Coal washery design - I : the E.M.R. process / J. Visman, Metals Reduction and Energy Centre. : M34-20/141E-PDF

“The process described here is designed for the beneficiation of coal, especially highly friable coals of the type found in western Canada. The main components of the E.M.R. process comprise the following four unit operations: selective feed preparation; scalping in bulk using water as a medium; oil-assisted drying of coal slimes; and water recovery. The system operates with a closed water circuit and avoids thermal drying, thus preventing pollution of the air and of water at the source. It provides for the optional treatment of middlings by special methods, e.g. the liberation of intergrown coal by grinding and separation by heavy-medium methods, tabling, etc. A wide variety of separators can be used, and this provides the flexibility of choice needed for producing optimum results at a maximum profit per ton of pithead coal (run-of-mine). A closed water system is maintained for all combinations. A general method for determining steady-state conditions is introduced. This procedure is essential for the advance calculation of slimes recirculation and its control, especially if the process must turn out metallurgical grades from highly variable raw coal"--Abstract, p. i.

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