Beneficiation of Cooking Coal By Column Flotation
Introduction
A national research organisation offers a process for beneficiation of cooking coal by column flotation. In general for the steel industry, the ash percentage of coal should not exceed more than 18%. In Indian coal the ash percentage is too high compared to the demand of steel plant. In the coal washery the coal is crushed to particular size to get the low ash coal by heavy media cyclone and fines and middling portion of the flotation to remove the ash content of the coal for final utilisation. In India particularly the cooking coal deposit is not much. So all the steps are to be taken to utilise the cooking coal as much as possible. In this process, the ash percentage is to be reduced from 35-40% to 16-18% from the tailing streams of the plant with 50% weight recovery. The work was carried out for the carbon recovery from tailing stream of West Bokaro Coal.
Washery II. In TISCO at 100 kg/hr rate the column flotation work was done in laboratory. It was scaled up to 3-4 tons/hr and the pilot plant was designed and installed at the plant site. TISCO has now advertised the Global Tender for commissioning the commercial plant of the capacity of 40 tons/hr on the basis of this technology.
Marketing of the manufactured product
Marketing should be done by the licensee.
List of machinery/ equipment
- Crusher
- Ball mill
- Conditioner
- Flotation column
- Centrifuge
- Slurry pumps
- Wash water reservair
- Reagent pumps
- Flowmeters
- Vibrating screen
Chemical Industry, energy
Production cost - Rs. 500-600/ton
Selling price - Rs. 1200-1400/ton
Capital investment - Rs. 50 lakhs for 3-4 tons/hr capacity with control system
Profitability - Rs. 20-25 lakhs/year
Inputs Required
Raw material
ROM coking coal/tailing of coal washery
Transfer Forms
Process know-how; Feasibility and techno-economics report; Design engineering; Guidance for installation and commissioning
Main Application
Energy
For further information please contact
Technology Bureau for Small Enterprises
APCTT Building, Qutub Institutional Area
P.O. Box – 4575
New Delhi – 110016, India
Tel.: 91—26864501, 26856276, 2696619/521
Fax : 91-11-26856274
E-mail : tbse@apctt.org
