The run-of-mine coal is to be broken in such a manner that 55% of it has a top size 1 half inches and that the ratio between top and bottom size does not exceed 5 to 1.
Reference:
Van der Walt, P. 1952. Crushing of Vereeniging coal to one and a half inches top size. http://hdl.handle.net/10204/13079 .
Van der Walt, P. (1952). Crushing of Vereeniging coal to one and a half inches top size Retrieved from http://hdl.handle.net/10204/13079
Van der Walt, PJ Crushing of Vereeniging coal to one and a half inches top size. 1952. http://hdl.handle.net/10204/13079
Van der Walt P. Crushing of Vereeniging coal to one and a half inches top size. 1952 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/13079
