Metal
and Metalworking Industry -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.
Techno-Economics:
A 100 tpd plant will cost Rs. 640 lakhs.
Technology Package:
(i) Process know-how
(ii) technological flowsheet and material, water balance
equipment sizing and selection consultancy
(iii) Advice and assistant on plant set up and commisioning
on separate terms.
Released Through:
NML/CSIR
Contact: Director
National Metallurgical Laboratory
Jamshedpur - 831007, India
