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Treatment of coal tailings

D. Woodruff,     FLSmidth, Germany

L. Macnamara,     FLSmidth, UK

Abstract:

This chapter describes the treatment of fine coal tailings from a coal preparation facility, starting from the acceptance of tailings, or fine raw coal, into a plant thickener, which concentrates the tailings as a slurry, and produces clarified water for recirculation to the process plant. The methods of disposal of the thickened slurry tailings are discussed, from the types of filtration technologies available, to new methods, including deep cone paste thickening. All these dewatering processes are designed to recirculate the maximum amount of water to the plant and offer alternatives for the tailings solids disposal to the older solution ...

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