Saturday 2 November 2019

J G Kumarmangalam Memorial Lecture on 45th CIL Foundation Day


JG Kumarmangalam Memorial Lecture on the 45th Foundation Day of Coal India Limited
November 01, 2019
Nirmal Chandra Jha
Former CMD, Coal India Limited.

Respected dignitaries on the dais, my eminent seniors in the audience, my colleagues and friends I worked with, all the executives and non-executives of CIL and its subsidiary companies and the friends from media!

I am honoured today to get a chance to deliver a lecture before you in the memory of late JG Kumarmangalam, the first Chairman of the nationalised coal sector. This is special to me as I had the privilege of receiving my degree in B. Tech. from the then Indian School of mines, now IIT(ISM) Dhanbad from this great personality in the year 1974.

This occasion reminds me of the period of my B. Tech. course study. Exactly fifty years ago in 1969, when I was admitted to the Indian School of mines, the coal sector was running through difficult times. The industry was largely in private hands with restricted growth & investment with only one public sector company, NCDC, managing some mines and new projects. Job opportunities were scarce. Mining education required at least seven years of rigorous studies and training to qualify for a respectable job. I was dissuaded by many of my seniors and relatives to shift to some other engineering college so that on passing out I could get a satisfying job. However, I thought of continuing at ISM.

During the course of my five years study period, the coal sector underwent massive reforms. All the private collieries were taken over by the Government in two phases, coking coal mines in December 1971 and non-coking coal mines in January 1973. The first government coal company created after nationalization of coking coal mines was Bharat Coking Coal Limited (BCCL) in 1972, followed by Coal Mines Authority Limited (CMAL) in 1973. The Government decided to bring all the nationalized coal mines under one umbrella and Coal India Limited was formed in 1975 encompassing four divisions of CMAL and BCCL as fully owned subsidiaries.

In the year 1974, when I obtained my degree from ISM, both BCCL and CMAL continued to have their separate identities and I got the appointment in BCCL and was posted at Sudamdih Project, inherited from the then NCDC. It was a boon in disguise for me to have been trained there, as this project later proved to be a stepping stone for many of my seniors and colleagues to rise through the hierarchy of management to the posts of Chairmen, CMDs and Directors of CIL and its different subsidiaries. I received great learnings from all these seniors and extend my gratitude to all of them. In the later part of my professional career the contributions of two of my seniors, Shree Shashi Kumar and Shree S V Chaoji are immense and I extend my special gratitude to them for being my mentors.

After completing 37 years of service I had my own freedom at midnight of January 31st 2012 after concluding the IXth Wage Board Agreement at 11:30 PM. As CMD, CIL I got the privilege of receiving Maharatna status for CIL in April 2011, which was a continuing effort from the past. CIL also became the most valued company in India for a brief period in August 2011. Movement of coal gradation and pricing system from UHV to GCV system from January 2012 was a long overdue wish of both CIL and the Government, and conclusion of the IXth Wage Agreement in a record time of 6 months were some other landmarks in my tenure. I was, however, a continuing link for the previous 4 years in the process of establishing CIL as a globally aspired company and the positives that we created during our tenure reflected in the form of a huge success of the IPO in 2010.

In the 44 years of existence of Coal India Limited it has grown from strength to strength and has largely served the coal needs of the country. Yet the word “Reform of Coal Sector” is often talked about. The fact that the policy of enhancing coal production in the country through other modes has not been successful, the onus of meeting country’s entire coal demand was and is being thrust upon Coal India Limited. Ever since the Electricity Act 2003 was promulgated, the domestic demand for coal has been rising, particularly for the power sector. There is a feeling amongst the stake holders that CIL has not been able to meet the country’s coal demand and the coal sector needs to be restructured or reformed. CIL’s monopoly status too is envied and the stake holders feel that in absence of competition, CIL’s efficiency of operations is not up to the mark. This issue has been coming up quite frequently both in the Government and the media and hence I feel my talk today should focus on this subject.

Nationalisation of Coal Sector

We need to analyze in the first place as to why the coal sector was nationalized in the seventies, when it was already largely being run by the private sector companies, some of which were of good repute. Also, National Coal Development Corporation, a public sector company established in 1956, had come up with quite a few good mines across different coalfields which today add to the strengths of CIL. If, we look back at the history of nationalization of coal mines, we find that the Government of India, ever since Independence, had been serious on coal sector, as it provided basic energy fuel. The Government came up with a National Mineral Policy in 1947 itself and a working party for the coal industry was set up in 1951. The Estimates Committee of the Lok Sabha in 1954-56 itself had come to the conclusion that in the long run nationalization of the coal industry was essential in the interest of industrial development.

Though, the recommendations of the Estimates Committee were accepted by the then Government, their implementation was delayed by 15 years. The prevailing conditions of coal mines at the time of nationalization are found mentioned in the book, “Coal Industry in India”, written by the then Minister of Steel and Mines, late S Mohan Kumarmangalam, which formed the objectives of coal mines nationalization that can be broadly summarised as follows:

  •              To reorganize small collieries into larger ones with the point of view of increasing the resource of amalgamated mines to augment production.
  •              To infuse capital in the coal sector for augmenting production commensurate with the industry demand.
  •            To safeguard the interests of the workers engaged in coal production.
  •           To deploy modern scientific mining methods with a view to both increasing the volume of production as well as conservation of coal.
  •         To emphasize on the safety of mine workers and their welfare measures, and
  •         To keep transparent records of production, safety and payment of wages and taxes & royalties etc.


Have the objectives of coal mines nationalization been met?

In the times that have gone by, I feel most of the objectives have been met, except augmenting production commensurate with the industry demand. More than 1100 mines were taken over in the two phases and later nationalized in May 1973. Many of these were amalgamated to form larger mines and production got enhanced. Subsequent new projects were opened up in larger areas with larger production levels. Today the total number of mines with CIL is stated to be 364. The size of mines has been on the increase over the years both in terms of area and the mine capacity. As on date CIL has 20 mines with annual capacity of more than 10 MTPA, contributing 380 MTPA, which is more than 50% of CIL’s current total production. It is also learnt that CIL has plans to increase the number of high capacity mines to 35 with total capacity of 806 MTPA, ranging from 10 MTPA to 70 MTPA in the near future. Average capacity of these mines would be around 23MTPA per mine.

Lots of actions have also been taken in respect of safeguarding the interests of workers both in terms of their monetary compensation and their safety. Today, CIL workmen are paid one of the best salaries in the Public Sectors and their satisfaction in the welfare amenities is also quite high. In the field of introduction of mining technologies too tremendous growth has taken place both in the underground and opencast mines. As regards record keeping, there is no denying the fact that in the present era of auditing no records can be fudged. 

With regard to infusing capital to open up more projects, both the Government of India and the Coal India Limited management over the years have done their best to invest in mines, augment production and meet the demand of coal by the coal consuming industries. Total coal production of CIL in 1974-75 was 79 MT which has grown to 607 MT in the previous financial year, registering a CAGR of 4.74%. The production, however, has remained short of the demand, resulting in increasing import of coal. Domestic supply of coal in the year 2018-19 was 735 MT against the total consumption of 970 MT, the shortfall being met through imports.

Coal Imports

Coal import had started in the year 1985 itself for meeting the coking coal requirement. The quantity kept on growing thereafter but remained under 25 MT till 2001. Coal imports, excluding lignite, coke and other coal products, increased to 59 MT in 2008-09 and thereafter steeply rose up registering nearly 235 MT in the last fiscal. This figure comprises nearly 50 MT of coking coal and about 185 MT of non-coking coal. Import of coal involves huge foreign exchange outgo. Total value of imported coal of about 208 MT during 2017-18 was about Rs. 1,38,477 crores. 

Whereas, coking coal imports cannot be avoided due to non-availability of the required quality indigenously, in the non-coking coal category also about 75 MT is non substitutable due to their higher quality and economic considerations of the coastal power plants. The balance 110 MT is of the quality that can be met from the indigenous sources and every effort needs to be made to supply such quantities from domestic sources.

One of the major factors responsible for increase in the imported coal quantities is the cost of coal vis-à-vis its quality. We are all aware that barring a few coalfields, the quality of Indian coals is much inferior compared to the internationally traded coals. Even for the same heat value, domestic coals have the disadvantage of much higher ash content compared to the preferred destination coals of Australia, Indonesia or South Africa. Thus, if the landed cost of imported coal in energy terms from any of these sources is the same as that from an indigenous supply source, the consumer prefers imported coal due to extra cost of ash handling. Hence, apart from the quantity considerations, it is equally important to make available the right quality on the basis of total cost of utilisation. Unless the domestic coal is competitive on total cost basis, I am afraid the rise in imported coal quantity cannot be arrested.

Coal scenario till date

Though, it is a history and known to all, I will like to spend some time in analyzing why the current situation of non-availability of adequate quantities of indigenous coal has arisen even after formation of Coal India Limited.

Until 1991, all the coal bearing areas, except those in the command areas of SCCL and leasehold areas of Tata Steel and IISCO (now SAIL) were with Coal India Limited and it had the freedom to open up any coal project to increase production as required, based on long term perspective plans. In fact, that was a period when the slogan was, “coal at any cost”. Government of India provided the budgetary support both for capital as well as for the revenue shortage, if any, and fixed prices for different grades of coal. In the process a number of coking coal projects, whose financial appraisal indicated loss even at 100% capacity utilization, were approved by the Government itself.

That time having passed over, the era of liberalization of economy, gradual withdrawal of budgetary support from the Government and allowing CIL to fix prices of its products set in during the years 1991 to 2000. This period also saw amendment of Coal Mines Nationalisation Act to allow captive mining by Power and Cement producers and operators of coal washeries in 1993. The Washery Operators, however, were not given any coal block. It was expected that as the growth in the industry sector was largely to come from three basic industries – power, steel and cement; captive mining would provide them opportunity with meeting their own requirements and the economy would be pushed forward by creation of infrastructure in the country.  CIL was asked to release all blocks of coal that it did not require for maintaining a production level of 400 MTPA for the next 20 years. The boundaries of CIL operations were, thus, limited by this policy and the rest of the coal blocks were earmarked for allocation under captive mining route for consumers of Power, Steel and Cement industries or reserve blocks. The allocations continued till 2009 and about 208 coal blocks were allotted to different allocates, which were found not legal by the Supreme Court, and were cancelled, barring a few, through its order dated 24th September 2014.

Contribution of coal supply through captive mining

In spite of 26 years of the history of introduction of captive mining policy by the Government, the contribution of coal production from this sector has been dismal. While CIL grew from the level of 305.4 million tonnes in 2003-04 to 606.9 million tonnes in 2018-19, SCCL grew from 33.6 million tonnes to 64.4 million tonnes, the captive mining grew from 9.5 million tonnes to about 50 million tonnes only in the same period, against its planned contribution of around 250 MT. This indicates that in spite of limitations in the coal resource ownership by CIL, it has shown ample growth in coal production. In my opinion, if CIL was allowed to retain ownership over the blocks it was forced to release for allocation in captive route, today’s coal production scenario of the country would have been different and the country would not have been subjected to import all the 185 million tonnes of thermal coal in 2018-19.
I remember, during the year 2006-07, when I was the Director In-charge of Coal Resource Development at CMPDI, the thrust on captive mining was huge and CMPDI, through CIL, was asked to identify more coal blocks with a view to allocating for captive use from out of the subsequently regionally and detailed explored blocks. These details were prepared and submitted to the Government. Parallelly, as the production from Captive blocks was not coming up, CIL was asked to meet country’s total coal requirement, through the New Coal Distribution Policy (NCDP), issued by the Government in October 2007, in spite of opposition from CIL. At CMPDI, we had worked out the maximum theoretical production that could be achieved from the then available CIL blocks, which worked out to a peak of around 700 MT. Based on this a request was made to the Government for allocating nearly 130 coal blocks to CIL with a resource base of nearly 15 billion tonnes for projectisation and meeting the directives of NCDP. However, till the year 2011, this did not come about and CIL had to struggle with its production plans within the confinements of its limited boundaries and the aggressive problems of land acquisition, forestry and environment clearances and the new concept of Comprehensive Environmental Pollution Index (CEPI) brought about in 2010. It is learnt that some subsidiaries of CIL have been allocated 15 additional coal blocks in the recent past, which have a potential to produce additional about 225 MTPA or so. But the contribution from these is not foreseen much till the FY 2025-26.

Future Coal Demand Scenario

Looking forward, the overall coal demand for the country is estimated to be 900 – 1000 MT by 2020 and 1300 – 1900 MT by 2030, as per the Coal Vision 2030 document, prepared by M/s KPMG for the Ministry of Coal. The demand scenario is influenced by economic growth, energy efficiency and emergence of alternate coal uses. By 2030, out of the overall coal demand, thermal coal demand is estimated to be 1150 – 1750 MT. While this appears to be a very wide range, the nature of uncertainties in the ecosystem are also quite wide.
Against these demands, CIL has proposed to produce and supply 1002 MTPA by the FY 2025-26. With the base of 660 MT at 2019-20, this will require a CAGR of 7.2%. Sustaining this type of growth consistently over next 6 years is a daunting task for CIL and it needs to gear up for the same on all fronts.

Challenges before Coal India and the need for strategizing its plans

In the past 4 years several statutory changes have been brought in by the Government with a view to augmenting domestic coal production. Coal Mines (Special Provisions) Act, 2015 provides for mining by both Government and private companies. This has paved way for commercial mining in the country. Mines and Mineral (Development & Regulation) Act 1957 has been amended accordingly in 2015 and processes for granting mining lease have been defined through auction route. However, even after introduction of these Acts, the concept of captive mining is continuing, which does not find place in the new Coal Mines Act. It is also learnt that the provision of prior approval of the Central Government for grant of mining lease is being done away with. The Government has already approved 100% FDI in the coal mining sector. These are some of the steps in the right direction to bring in more players in the field of coal mining for increasing domestic coal.

The average PLF of power plants is sliding down and has reached the level of 52% in August 2019, which used to be above 80% in the year 2009-10. Many new capacities in power generation have been created but neither there is enough coal to produce the same nor at times there is enough power market for utilizing these created capacities. In one of the conferences last month I attended, the Central Power Secretary asked the participants that due to such great famine of coal there was a need to develop technologies that could produce coal within two years from the date of allotment. His wish list also included opening of coal mines of 100 MTPA capacity.

While his wish might have been driven by the problems, he is faced with in Power Ministry, getting domestic coal production from new blocks or enhancing even existing projects so quickly or in such quantities in the present environment is a difficult dream. The problems of land acquisition, statutory clearances for forest land and environmental clearances continue to hinder the path of timely operationalisation of  coal blocks. Added to this are the problems created by the local habitants every now and then and at times they have the free ways to bring even highly producing mines to a grinding halt. Also, being an industry under the sky, the severity of the seasons adversely impacts coal production. Thus, whether mining is done by Coal India or Commercial Miner or the Captive Miners, these problems are common to all. The Government, therefore, has to tackle these issues effectively and help increase domestic coal production.

Commercial Mining

Introduction of commercial mining is hoped to solve the problems of coal availability in the country. The stakeholders have the feeling that in absence of any competition Coal India’s efficiency is poor and hence commercial mining is required at the earliest to improve CIL’s efficiency. I have a different view point. Though, statutory provisions for this was made four years ago, the first auction for allotment of coal blocks under this policy is yet to be made. If, it takes so much time just for allotment of a block, how much would be required for bringing such blocks to production. Other issues that need to be considered are - who is going to finance such mines in view of the uncertainties that the mining sector is faced with? Also, what is most important is the quality of coal in such blocks. Almost all the new blocks have very inferior quality of coal with high ash content. The size of blocks is another issue for planning large production to make them profitable. An investor looks for a return on investment of not less than 20%. I do not think any player will get such high return from commercial mining in India. Thus, in my opinion, meeting entire demand and making coal availability surplus through commercial mining is a difficult task and the failure, if any, of this concept of mining, is likely to put Coal India on continuing pressure of producing more coal. It is, therefore, imperative that Coal India prepares itself to provide quality coal at the least price and continue to remain a competitive player in the market.

Diversification

Coal India also needs to plan for diversification of its business with an eye on future. We should not forget that in the fast-changing technological scenario in the world, no existing technology has a long-term life, be it in any sector. Hence, the challenges from the renewables should be taken seriously and Coal India needs to strategize its actions in demonstrating power generation through renewables, particularly solar power, by utilizing the land available from its mined-out areas. Diversion in the areas of producing syngas, transportation fuel and chemicals from coal is also a necessity now for sustenance of Coal India as a business entity.

Introduction of latest technologies

In the past, several new technologies were introduced both in underground mining and opencast mining through the bi-lateral agreements with the advanced mining countries and new technologies were introduced. Bi-lateral agreement system between two Governments was later abolished for the mining sector and this route for new technologies got closed. I agree that the scope of high capacity Longwalls in our underground mines is limited, but Continuous miners and Short-wall in Underground mines and mechanized cutting of OB and Steep angle conveyors for coal haulage as well as in pit crushing and conveying system both for coal and OB in Opencast mines need to be tried to prove their cost effectiveness. On quality front too, setting up of Washeries on a large-scale basis would be a necessity for future. The proposal of loading all coal through silo loading system has to be expedited so that fast loading is established at all rail loading points. Road transport needs to be completely eliminated for improving environmental set up in coalfields. These are some of the focal areas that CIL has to put thrust on in order to remain a global best practices coal mining company. I would also suggest that CIL needs to reverse its declining trend of departmental production by adopting best mining technologies, else it may have a threat to remain a coal mining company.

Suggested policy interventions by the Government for enhancing indigenous coal production

In the light of the foregoing discussions some policy interventions are suggested to the Government also for consideration:
  1.          Coal India should be allocated more coal blocks in the vicinity of their operations and should be facilitated in getting the various clearances for starting coal production at the earliest. In the long run Government can only depend on its own company and not on private companies which will have the option of shutting down its business in the case of adversities.
  2.               Coal blocks for auction should be formed with larger resource base, preferably with extractable coal reserve of 200 MT and more to enable the successful bidder to plan for high capacity mines of not less than 10 MTPA by opencast and 2-3 MTPA by underground.
  3.              There should be only two types of coal producers – a Government company and other company, as is mentioned in the Coal Mines (Special Provisions) Act, 2015. Distinction between captive miner and commercial miner should be removed.
  4.             With the introduction of commercial mining, pricing of coal would become a bigger issue and there would be a lack of level playing field between the existing producers of coal and the new entrants. CIL has inherited the past legacies and is losing heavily on underground mines. The new entrants will have their operations in the Greenfield areas and will have the liberty of choosing manpower and technology to make the mine more profit oriented. A regulatory authority would be required to be set up for fixation of price of coal based on cost of mining by the different companies.
  5.               Ministry of Coal should put a coal block in the allocation list only after written consent from the Ministry of Forest & Environment that the block shall be granted forestry clearance following the due process in a defined timeframe.
  6.             Land acquisition & Resettlement and Rehabilitation (LARR) Act, 2013 should be amended to exclude the provision of obtaining consent from the villagers. Once the block has been selected for mining, all hindrances for further clearances from the public should be removed from the law for its timely projectisation and production.
  7.            The criterion of environmental clearance based on coal production capacity of a project should be changed to total excavation capacity, including that of the over burden in the case of an opencast mine, as only coal production does not create environmental degradation but the OB too has a role in it. This will provide an opportunity for the producers to increase the coal production in any year if the required OB removal is less, without any violation of environmental norms.
  8.           Even after simplification of the processes for environmental and forestry clearances the time taken for clearance has not reduced considerably. The concept of single window clearances for all approvals, starting from approval of mining plan to mine opening permission should be introduced. Accountability should be fixed for delays in clearances as a deterrent for delays. Introduction of time bound e-clearance would be quite helpful in this respect.

To conclude, I would like to reemphasise that Coal India Limited has been and will continue to remain the mainstay of the country in respect of coal supply. I congratulate the present management team under the leadership of Shree Anil Kumar Jha in registering a growth of plus 7% in coal production and supplies last year. The growth this year so far has not been as desired but I hope with the competent team that Coal India has today, it would be achieved by the end of the year. I do hope the stakeholders will take enough steps to restore the value of Coal India that the market had recognised in the past.
Thank you very much for giving me a patient listening.


Friday 19 July 2019

Coking Coal Availability for Indian Steel Industry – Issues and Challenges.


Steel demand projections

India has become the 3rd largest steel producer in the world with a production of 91 MT and a capacity of 125 MT in FY 2015-16. The low per capita steel consumption of being low at 61 Kg in India compared to world average of 208 Kg, there is significant potential for growth. As per the National Steel Policy, 2017, the crude steel demand will grow threefold in next 15 years to reach a demand of 255 MT by 2030-31. It is anticipated that a crude steel capacity of 300 MTPA will be required by 2030- 31, based on the demand projections. Even with this demand of crude steel by 2030-31, India’s per capita finished steel consumption would reach only to 158 Kg.  However, achieving crude steel capacity up to 300 MT will require extensive mobilization of natural resources, finances, manpower and infrastructure including land.

Requirement of coking coal

As per the aforesaid Policy, the demand for coking coal is expected to be 161 MTPA; that of non-coking coal for PCI about 31 MTPA and the non-coking coal requirement for DRI route is estimated at 105 MTPA by the FY 2030-31.

The current dependence on imported coal is about 85%, which as per the National Steel Policy is supposed to be brought down to 65% by 2030-31. This indicates that 35% of the total requirement of 161 MTPA by 2030-31, i.e., 56.35 MTPA needs to be met from the domestic sources by the year 2030-31. This is a great challenge for both the Steel Producers and the Coal Producers in the country.
The National Steel Policy aims at increasing the availability of coking coal through overseas asset acquisition, establishing  sufficient number of modern coking coal Washeries, facilitating allocation of indigenous coking coal reserves in the country exclusively to steel sector with no diversion of such coal to any other sector, facilitating exploration and optimal utilization of deep seated coking coal reserves,  expeditious implementation of Jharia Action Plan to improve the domestic availability of coking coal and  taking suitable fiscal measures to support the rising requirement in the steel sector.

Coking Coal Availability in India

Though, India is fortunate to have 3rd largest share of coal resource in the world, the quantity of coking coal is very limited. Further, due to the “Drift Theory” origin of coal in India, where the woody material was transported to longer distances, carrying along external impurities, made such coals contain very high amount of inert material or mineral matter, commonly known as ash content. These mineral matters are finely disseminated within the coal matrix, which have made the coal more difficult to be washed or beneficiated for reducing the ash content.

Coking coals in India are categorised in three categories, namely Prime Coking Coal, that can form coke for metallurgical purposes without blending with other coals: Medium Coking Coals, that require blending with Prime coking coals for coke making: and Semi-coking Coals that are weak in coking properties but can be blended in small proportions with Prime coking coals for coke making.
Prime coking coals are available in India only in the upper seams (Seams IX and above) of the Jharia Coalfield, which have mostly been exploited in the past and the remnant resources are now available in the surface constrained areas like, Surface Fires, Rivers, Townships, Human Settlements and Road & Rail infrastructures.

Medium coking coals are available in various coalfields in Jharkhand (lower seams of Jharia coalfield, Raniganj, East Bokaro, West Bokaro, Ramgarh, North Karanpura & South Karanpura), West Bengal (Raniganj coalfiled) and, Madhya Pradesh (Pench Kanhan & Sohagpur), which have substantial resources with high ash content.

Semi-coking coals are available in very limited areas of West Bengal (Raniganj coalfield), Jharkhand (Ramgarh coalfield and Chhattisgarh (Sonhat coalfield).

As per the GSI estimates of 2017, the total coking coal resource in India is 34.533 billion tonnes (Bt) with Prime, medium and Semi-coking being 5.313Bt, 27.512Bt and 1.707Bt respectively. Based on the status of exploration the break-up of these resources is as follows1:

Coal Type
Measured Resource (billion tonnes)
Indicated Resource (billion tonnes)
Inferred Resource (billion tonnes)
Total Resource (billion tonnes)
Prime Coking
4.614
0.698
0.000
5.313
Medium Coking
13.500
12.132
1.879
27.513
Semi-coking
0.519
0.995
0.193
1.707
Total Coking
18.634
13.826
2.072
34.533
1.     Source GSI publication

General characteristics of coking coal

Coking coals are such coals that can form quality coke during carbonisation. Coke quality in terms of cold and hot strength plays an important role in the smooth running of Blast Furnaces. The four most important characteristics of coke that dictate the right quality parameters of coking coals required to make such coke are, Micom-10, Micom-40, CSR and CRI values. These are basically the strength parameters of the coke at different conditions.

Amongst all ranks of coal, depending on their age (Peat, Lignite, Bituminous and Anthracite), only a few bituminous coals possess the required properties for production of right quality coke for the use in a Blast Furnace. As such, the quality parameters of the coking coals are very important for deciding the blend ratio of different coking coals from different sources for making a good coke. The required characteristics of coke are achieved by making coke after blending coking coals from different sources to satisfy the pre-defined proximate characteristics, ultimate analysis characteristics rheological properties, petrographic properties and the ash chemistry.

Important parameters of the proximate analysis are the moisture content, volatile matter and the ash (inorganic residue), each expressed as percentage of total. The ultimate analysis results show the percentages of different elements like C, H, N, S and P.

In the rheological properties, Free Swelling Index (FSI) or Crucible Swelling Number (CSN), Maximum Fluidity (ddpm) and Plastic Range are very important to decide the suitability of any coal for coke making. For high strength coke, various coals used in the blend should have a broad range of common plastic temperature; otherwise coals will not be compatible.

During the process of formation of coal, that is, conversion of wood or plant material to bituminous coal stage, different types of macerals, like Vitrinite, Semi-Vitrinite, Liptinite, Exinite and Inertinite are formed that behave differently upon heating. Only the first four macerals are characterised as reactives. Petrographic properties are determined through microscopic studies of coal samples for determination of their type, rank and mineral matter. General characteristics of coking coals show that the reflectance of Vitrinite (Ro) varies from 0.6% to 1.8%, however, the acceptable range of reflectance (Ro) for good coke making varies from 1.1% to 1.4%. Mean maximum reflectance (MMR), which is denoted as Rmax or MMR is normally 1.066 times Ro value.

The ash chemistry of coal in terms of its composition as CaO, SiO2, Al2O3, Na2O, K2O etc. are also important to decide whether the slag of the Blast Furnace will have acidic nature or basic nature.
Thus, it can be seen from the above that selecting a particular coal for coke making requires rigorous testing of the same in terms of the different required properties and making coke after blending the same with other suitable coals to meet the required coke parameters.

Quality Comparison of Indian Coking Coals with Australian coking coal

Australia is the major supplier of coking coal to India and also to the world trade. Indian Steel producers meet their requirement of coking coal largely from Australia and partly from USA, New Zealand, Mozambique, Russia and China. Quality-wise Australian coals are superior and as such are more favoured by the Indian Steel industry. However, the international price of coking coal is very volatile and becomes unaffordable for the steel producers at times.

A comparison of some typical imported Australian coking coal with typical Indian coking coals is shown below2:

Sl. No.
Coal/coke parameters
Australian coking coal
Indian washed coking coal
Remarks
A
Proximate Analysis




Moisture (%)
1 - 2
2 – 2.5


Ash (%)
7.5 - 9.8
15.24 – 18.03
Higher in Indian coals.

Volatile Matter (%)
19.3 - 24.3
18.58 – 24.84

B.
Ultimate Analysis




Carbon (%)
88.3 - 90
70.9 – 75.1


Hydrogen (%)
4.67 -  5.0
4.03 – 4.23


Nitrogen (%)
1.8 - 2.06
1.08 – 1.57


Sulphur (%)
0.55 -  0.7
0.57 – 0.83


Phosphorous (%)
0.007 - 0.07
0.026 – 0.18

C.
Petrographic Analysis




Vitrinite (%)
55 - 70
46.5 – 55.0
Lower in Indian coals.

Liptinite (%)
0 - 1
0 – 4.4


Exinite (%)
0
0


Inertinite (%)
27 – 42
38.1 – 45.6
Higher in Indian coal.

Mineral Matter (%)
2 – 4
5.9 – 9.9
Higher in Indian coal

Vitrinite Reflectance (Rmax)
1.17 – 1.55
0.98 – 1.3
Lower in Indian coal.
D.
Ash Analysis




SiO2
50.3 – 66.5
8.22 – 11.25


Al2O3
28 – 33.1
4.92 – 5.29


Fe2O3
2.4 – 7.6
0.01 – 1.05


CaO
0.2 – 3.9
0.095 – 0.63


Na2O
0.3 – 0.9
0.001 – 0.052


K2O
0.85 – 1.5
0.2 – 0.33

E.
Caking Property




CSN
7.5 – 9.0
5 – 6
Lower swelling index due to higher ash in Indian coal.

Gray King Coke Type
G5 – G10
C – E/F
Relatively inferior coke type
F.
Giesler Plastometer Value




Maximum Fluidity (ddpm)
75 – 1100
772 - 2400
Superior fluidity in Indian coal.
G.
Coke Properties




Micum M40
80 – 84
NA


Micum M10
7 – 8
NA


Coke reactivity index (CRI)
21 – 35
NA


Coke Strength after reaction (CSR)
65 – 72
NA

2.     Source: Compiled from various available sources.

Coking coal price concern

Historically, price of imported coking coal had a downward trend since 2012 (US$ 252.1) till 2015 (US$ 90). From the second half of 2016, there has been steep rises in the prices, sometimes touching the figure of US$ 260 per tonne. Coking coal prices in the international market continue to trend higher since December 2017 on the back of supply tightness in Queensland, Australia. Difficulties in securing loading slots in Queensland for contract cargoes continued to tighten global supply of coking coal in late 2017. In March 2018 the prices are in the range of US$ 220-225 per tonne.

Soaring price of internally traded coking coal is a cause of great concern for the Indian steel producers due to their competitiveness in the world market for the steel products.

Need for demand side management

With the limited availability of domestic coking coal for the required quality and its spiralling high prices in the international market, it is necessary to look at the demand management side. It is more so important when we look at the current consumption rate of coke in Indian Steel Plants vis-à-vis global best practices. The National Steel Policy endeavours to pursue with the Integrated Steel Plants to reduce their coking coal consumption at par with global best practices by resorting to auxiliary fuel injection technologies like Pulverized Coal Injections (PCI)/ Coal Dust Injection (CDI) or natural gas/ syngas injection along with PCI/ CDI.

Targets for the techno-economic performance, as set forth in the National Steel Policy are as shown below:

Parameters
Units
International Best Practice
Current
Target for 2030-31
Coke Rate
Kg/thm
275 - 350
400 - 600
300 – 350
CDI Rate
Kg/thm
200 – 225
50 – 200
180 - 200
BF Productivity
tonnes/m3 /day
2.5 – 3.5
1.3 – 2.2
2.5 – 3.0
Specific Energy Consumption
Gcal/tcs
4.5 – 5.0
6.2 – 6.7
5.0 – 5.5


Coking coal production plan of Coal India Ltd for FY 2019-20

CIL has planned to enhance its coal production to the tune of 908MT by 2019-20. A breakup of the planned production vis-a-vis individual subsidiary is as follows3:-

Subsidiary Name
Total (MTPA)
Coking coal (MTPA)
Non-Coking Coal (MTPA)
G-10 & superior
G-11 & inferior
ECL
62.0
0.25
44.75
17.0
BCCL
53.0
45.78
7.22
-
CCL
133.5
24.4
45.57
63.5
NCL
110.0
-
96.00
14.0
WCL
60.0
0.52
59.48
-
SECL
239.6
0.14
20.42
219.0
MCL
250.0
-
1.5
248.5
Total
908.10
71.12
274.94
562.04
3.     Source: Published paper in the 5th International Conference on Coal Washing.

As can be seen from the above, around 71 MT of coking coal is planned to be produced, but due to non-availability of adequate washing capacity in CIL, most of these are being supplied to the power plants. This is the current practice and is likely to continue until the washery construction programme of CIL gains ground.

Coking coal washing - Present capacity and future plans

Most of the coking coals, being produced currently and also projected to be produced in future, are of inferior grade with ash content generally exceeding 35%. The current washing capacity of Coal India for coking coals is around 23.3 MTPA and it has a plan to set up new coking coal washeries to meet the requirement of coking coal for the steel producers. However, as Indian Coking coals have very poor washability characteristics these washeries are planned to wash at 18-19% ash content.

At present the total installed capacity of the coking coal washeries in India is about 31 MTPA which operate at around 20-30% capacity utilisation. Such low capacity utilisation is owing to the fact that most of them were set up 4 to 5 decades ago and not much required improvements were made in them with the changing quality of feed over the years. These washeries were planned with feed from superior grade coals, which have since exhausted.

CIL has identified to set up 18 new coking coal washeries with total throughput capacity of 48.2 MTPA (Source: Corporate presentation of CIL, April 2017) in its various subsidiaries under BOM/BOO concept. Three of these washeries at BCCL with a combined capacity 11.6 MTPA are likely to be commissioned shortly. Other three coking coal washeries with total capacity of 7.0 MTPA are in different stages of construction and are likely to commission by the year 2019-20. Additional one new coking coal washery with throughput capacity of 3.5 MTPA is planned to be set up at Tasra project of SAIL.

In view of the above the total installed capacity of the new washeries and the existing washeries of Tata Steel would be about 59.4 MTPA, which at an average yield of about 45% - 50% can provide clean coals at 18% ash to the extent of 27 to 30 MTPA. As most of the existing washeries would be replaced with the new ones, there still remains much gap between the estimated demand of coking coal from indigenous sources  and its likely availability. Further, it is also important to examine whether, all the domestic coal with 18-19% ash can be blended with imported coal at the steel plants from the point of view of Blast Furnace productivity and the related costs.

Prospect of washing Indian Coking coal at lower ash level

A Committee was constituted by the Ministry of Coal, Government of India in March 2017 under the Chairmanship of CMD, CMPDI with members from Steel and coking coal producing companies, CIMFR and IIT(ISM), Dhanbad for assessing the technical feasibility of washing coking coals (W-IV/ LVMC) to 13% ash content and the cost economics thereof.

Comprehensive studies were made by collecting samples of coking coal from the mines/seam currently under production, conducting washability tests and evaluating the cost of clean coal at 18% ash, 15% ash and 13% ash. The Committee’s major findings were as follows:

  1. In general, the desired selling price of clean coal produced on washing W-IV coal is less than the desired selling price of clean coal produced on washing ungraded coal.
  2. In the case of washing coal to obtain cleans coal at 13% ash, there is huge generation of middlings as compared to that at 18% ash clean coal. Marketability of such huge quantity of middlings needs to be looked into.
  3. In the case of clean coal at 13% ash, it is obvious that significant quantity of coal having coking properties is reporting to the middlings which could otherwise be used for metallurgical purpose.
  4. Depending on the quality of raw coal feed (W-IV & ungraded) and its washability characteristics, the theoretical yield of clean coal at 13% ash varies from 13% to 28% and the corresponding middlings at 34% ash varies from 62% to 51%, which is more than double the quantity of middlings generated at 18% ash clean coal. This indicates that huge quantity of coal having metallurgical properties migrates to middlings which can otherwise be used for metallurgical purpose if washed to obtain clean coal at 18% ash level.
  5. For washing W-II/ W-III grade coking coal at 13% ash clean coal, new washeries may be set up in the areas where there is potential of better yield leading to favourable techno-economics and the consumer is willing to accept clean coal at that price on long-term basis.
  6.  The technology for Washing may be selected on the basis of percentage of Near Gravity Material (NGM) at the cut-off ash, which could be Jig for <20% NGM and Heavy Media for >20% NGM.
  7. Washing of coking coal to produce clean coal at 13%, 15% and 18% may be considered based on the overall economics of the project which is greatly dependent on yield%. To have a balance between cost of production, yield and ash%, project specific study needs to be carried out in a holistic manner.
  8. In view of the above, it was recommended that washing of coking coal (WIV & LVMC) at 18% ash level will give viable techno-economics for both Steel Sector and CIL.


Emerging Technologies for extracting less than 10%-12% ash coal from high ash Indian coking coals.

A.         Studies done by CIMFR

CIMFR had conducted some studies on grinding of Low Volatile Coking coal to 100 micron size and then beneficiating it by floatation. To achieve the low ash (below 12% ash content, two-stage floatation studies were carried out. The typical results of the rougher and cleaning stage floatation by floatation column is shown in the flow sheet.

This coal has potential to give the product around 10%-12% ash content with 41%-42% yield and second product can be produced around 34%-35% ash having 16%-17% yield. The overall yield in two stage processes is around 57%-58%. The rejected tailings are having 68% ash content.  The second product can be used directly for power generation. There is also the possibility by blending the tailings with product II to use in fluidized bed power generation plant to utilize the full combustible values. 

This study indicates that there is ample potential to get up to 10% ash coking coal from Indian ROM coking coals. However, its cost economics and the technology for binding the 100 micron size product, to make them transportable, needs to be developed.

It is suggested that Indian Steel Producers should commission Research Organisations to develop this technology to recover maximum carbon from the domestic coking coal. It may be worth mentioning that the technology for drying and conditioning micron size coals to form a product in pellet size has already been developed in USA, which would require to be adopted in this technology. 

B          Recent developments in coal refining (reducing ash in clean coal to around 5%)

A remarkable new coal technology has been developed recently in the USA where coal refuse from the coal washeries are processed to efficiently separate it into hydrocarbon, mineral matter and water factions. The process takes place at a very small particle size (averaging around 100 microns) enabling the particles to respond to nano agents – the coal becomes very hydrophobic, facilitating very effective ash-mineral separation. The hydrocarbon fuel separated from this process is an extremely high quality coal and is produced as a robust, stable pellet with approximately 2 % moisture and 5% ash. As a fuel, such low ash-low moisture hydrocarbon fuel delivers substantial value in use for power stations (for thermal coal) and steel production (for coking coal).

Pilot scale demonstration of such separation at a capacity of 3 tph module has been made with the result of substantial reduction in the ash content and improvement in the FSI of coking coal rejects. It is also gathered that a number of small modules of 3 tph could be clubbed together to create an integrated capacity of 2 MTPA throughput for such processes.

Though, the above mentioned development is quite new and requires to be evaluated on commercial scale, the development itself appears to be innovative and requires a closer scrutiny for its use on a commercial scale for treating Indian coking coals which have inherently high ash content.

Conclusions

Indian Steel Producers are facing a lot of challenges in meeting the competitiveness of marketing steel in the world market due to highly volatile prices of coking coal. This is further compounded by the mammoth plan of increasing steel production in India in the coming 15 years. Domestic coking coal, having high ash content and difficult to wash characteristics, restrict their washability at lower ash levels and become extremely costly compared to the internally traded coking coals. However, in order to control overall costs of production of steel, it is necessary to blend domestic coking coals to the maximum extent, without compromising on the overall cost of production of steel. A lot of R&D work has to be undertaken to harness maximum quantity of coal at lower ash from the domestic coal. The conventional system of gravity based coal washing is not a solution to the increasing demand of coking coal. The emerging technologies need to be developed as discussed in the previous paragraph need to be tried and established to make them commercially viable to increase the availability of domestic coking coal for metallurgical purposes. The best way to maximise utilisation of Indian coking coal would be to conventionally wash it at 18% ash and treat the rest of coal (middlings and rejects) in the new technologies to reduce the ash to below 8-10% and blend it with 18% ash clean coal to reduce the overall ash content of the blend.