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A combined demineralization-agglomeration two-stage process for salty coal is introduced for increasing quality and yield of coal concentrates.
The salt was dissoluted and removed by coal treatment with 0.1-0.3 mass% oil. After demineralization 3-20 mass% of oil was added to the coal hydromixture The resulting coal concentrate has ash content of 6-lo%, moisture content of lo-12%, and salt content ~0.4% per dry mass.
π SIMILAR VOLUMES
Datong coal has high flotability and Illinois coal has low flotability. They were used to study flotability with respect to evaluation of the critical wetting surface tension (yc) of each coal particle. When the flotability of coal particles having the same yc value was compared between Datong and I