Community Research and Development Information Service - CORDIS


Modern mining methods produce large quantities of fines and most coal preparation processes result in yet more fines and the addition of water. Pressures for a reduction in sulphur emissions from coal-fired power stations may cause coal for this purpose to be crushed to much finer sizes. Typically about 50% of the sulphur in British coal occurs as iron pyrites or marcasite, which can be removed by physical means. This report presents results of a project whose main aim was to examine methods of control of flotation plant (and associated water circuitry) to achieve a more consistent product with as low an ash content and as high a solids content as possible. A successful technique had already been established to control flotation plant (and associated equipment) but the costs were prohibitively high. A digital computer was dedicated to solving conservation equations based on off-line sampled readings of ash content, solids concentration and certain real-time transducer measurements. Tests showed that significant improvements could be achieved by applying extra measurement and control to this circuit, as long as complexities in its real-time performance and in its supporting infrastructure could be accommodated.

Additional information

Authors: JONES T, British Coal Corporation, Cheltenham (GB);SPRIGGS D, British Coal Corporation, Cheltenham (GB);WILLIAMS J, British Coal Corporation, Cheltenham (GB)
Bibliographic Reference: EUR 17157 EN (1997) 214pp., FS, ECU 36.50
Availability: Available from the (2)
ISBN: ISBN 92-827-9225-0
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