Combining Dry and Wet Separation Methods Toward Improved Quality of Coal Siftings
Yu. F. Patrakov1, S. A. Semenova1, A. A. Stepanenko1,2, M. S. Klein1,3, T. E. Vakhonina3
1Institute of Coal, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
2Gormashexport JSC, Novosibirsk, Russia
3Gorbachev Kuzbass State Technical University, Kemerovo, Russia
Keywords: Pneumatic separation, hydraulic separation, gravity separation, flotation, oil agglomeration, coal, quality, consumption
Abstract
The article exhibits possibility of efficient treatment of coal siftings 0-13 mm in size as a case-study of the combined dry and wet separation of coking low-caking, low-metamorphozed coal. On the basis of estimation of processing behavior of the initial material, as well as the sieve, fraction and mineral analyses of different size grades of coal, several process flow sheets are developed. These process flow sheets include dry pneumatic separation of coal size grades of 1-13 mm, wet spiral separation of coal slime 0.2-3.0 mm in size, as well as flotation and oil agglomeration to separate coal and rock particles in fine coal slime. The proposed process flow sheets allow producing concentrates with the ash content from 15.3 to 9.9% at the mineral-free matter recovery to 90% and the calorific value over 7000 kcal/kg.
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