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Coal India does not have the capacity for underground mining, latest technology and safety measures. So the question isWould washing coal make a difference in India? In short, the answer is no. There is no regulation and fly ash is not treated as hazardous waste.
Coal Washing Exploration in India dates back to 1900s; though, first coking coal washeries in India were installed after independence. At present, most of the coking coal washeries are owned by
#0183;#32;CCS s seen a crucial climate prot ction technology for coalrich countries like India having potential in massively reducin CO2 emission as compared to any other existing technology. As third largest producer of coal and fourth largest greenhouse gas (GHG) mitter, India''s total emi sion are 7% of global emissions an is increasing at % per annum.
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Coal India Ltd. has taken the initiative to set up six washeries with a total capacity of about 19 Mt/y for washing LVMC coal in BCCL and CCL (Table ). The mode of setting up of five washeries in BCCL is under a BOM concept,, buildoperationmaintenance basis, through a global bidding process.
JCOAL is building a 400 tons/hour variablewave jig in the State of Odisha, India, as a coal washing model project of the New Energy and Industrial Technology Development Organization (NEDO). The project is intended to promote introduction of variablewave jigs in India, as there are many governmentowned and private companies planning to build new coal washing plants across India.
This technology works on the principle of vibrations. Coal is fed on to a vibrating fluidized bed having a height of 100 to 500 mm. It gets dried while travelling from one end to the other. Thus, VFBD Technology for drying coal is far superior to other systems in respect of : Wide particle size variations (no need to crush wet coal)
III. COAL WASHING TECHNOLOGY OPTIONS Clean coal technology being practiced in coal washeries in India, as precombustion clean coal technology, mainly focus on cleaning of coal by removing ash from coal. Earlier only coking coal was being washed because steel making needs coking coal of ash of 17 to 18%. The raw coal ash in Indian coking coal
Both clean coal and Rejects from the bath are fed to the dedicated desliming amp; rinsing (D amp; R) screens from which they are fed to the clean coal and Reject bunkers via respective conveyors. Under flow from the D amp; R screens are collected in Dilute Media Sump and fed to a Magnetic Separator for recovery of Magnetite, which is reused as media in the LOFLO Bath.
Coal gasification accounts for 5% of Chinas total coal consumption; it is a core technology in efficient and clean coal conversion, and important in the development of coalbased bulk chemicals (chemical fertilizers, methanol, olefins, aromatics, ethylene glycol, etc.), coalbased clean fuel synthesis (oil, natural gas), advanced integrated gasification combinedcycle (IGCC) power
#0183;#32;Figure: PESTEL Analysis of Coal Washery Industry Setting of Coal Washeries Legal Social Government Initiatives and Support Impact on Ecological Factors Policies and Governing Laws Cost Benefit Analysis Impact on local population Presently used and emerging technologies Usage of washed coal and washery rejects ROM Coal The report starts with the snapshot of coal washing industry in India
Currently 4 prominent/established technologies for coal washing are available in India. These are Barrel Washer, Heavy (Dense) Media Bath, Air (Pneumatic) Jig and Water (Batac) Jig. We expertise in all these technologies and use them at least at one of our plants depending upon the requirements and available coal quality.
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History of coal washing in India |
Unlike the rest of the world, Indian coal producers sell run of the mine coal. Simple deshaling, improved mining procedures and sizing of coal could bring down the average ash content of Indian coal to around 35% from the current level of over 40%. Full washing could reduce the ash content further, thereby saving transport costs
India is heavily dependent on coal based power for its electricity needs, 79 per cent of total electricity generation is coal/thermal based. This is not expected to change drastically in the near
Coal Washing Plants consist of several subprocessing modules including raw coal preparation (crushing and screening station), pre discharge rejects (rom jig, dense medium vessel/bath, rotary breaker), coal feeding and washing module (jigging or dense medium cyclones) as well as a dewatering module, coal handling module (conveyors, train/truck loading station, stacker reclaimer).
Coal Washing in India #190;A mty coal washery was setup with US technology at Dipka (Chattisgarh). #190;CLI, a US company, constructed the washery. #190;Tehnoeconomic studies were conducted with US AID. #190;The study recommended technology with heavy media separation. #190;Recently capacity of the washery enhanced to mty. amp; is operating at +100 %
#0183;#32;To be frank, coal, in its true sense, wouldnt ever be cleanbut it could be used in a cleaner manner than it is today. And we, the humble residents of the planet, would be much better off with the help of the clean coal technology. (*)Ms. Harsha, Department of Management Studies, Rajiv Gandhi Institute of Petroleum Technology, India
History of coal washing in india . Coal Preparation in India A Historical Perspective The earliest record of systematic coal washing study in India was an attempt by Prof. William Galloway using a preBaum type Jig washer before World War I on tested Assam coals.
By doing coal gasification we can get clean energy. We are inviting other countries to come with their technology for use in coal gasification, whether it can be used in mobility,quot; he said. quot;We cannot deny the resources and assets that India has but we want to see how can we make use of these assets in an environmentfriendly way.
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