Clean Coal (Coking/ Non-Coking)
Process
A process for the beneficiation of high ash coal.
Uses
For metallurgical use (coking), for direct reduction of iron ore, coal dust injection in blast furnace (non-coking).
Salient Features
The process is based on crushing, grinding and flotation of raw coal. Depending on the coal characteristics, a clean coal of 12% ash with 40-50% yield, 17% ash with 50-75% yield has been obtained for coking coal. For non-coking coal concentrates of 10-12% ash 40-65% yield have been obtained from a feed of 22.5-30% ash.
Environmental Considerations
Does not need any special attention.
Scale of Development
The process has been developed on 20 tpd scale.
Commercialisation Status
Washing plants at Jamadoba, West Bokaro, Dugda, Gidi, based on NML flowsheet for coking coal floation plant.
Major Raw Materials
Raw coal, Kerosene, Diesel oil, Pine Oil, Sodium silicate.
Major Plant Equipment/Machinery
Crushers, Grinders, Floation banks, Conditioners, Thickeners, Filters, Conveying equipments, Pumps.
Techno-Economics
A 100 tpd plant will cost Rs. 640 lakhs.
Technology Package
- Process know-how
- Technological flowsheet and material, water balance equipment sizing and selection consultancy
- Advice and assistant on plant set up and commisioning on separate terms.
Released Through
NML/CSIR
For further information please contact
Director
National Metallurgical Laboratory
Jamshedpur-831 007, India
