IMPROVED PROCESS AND PLANT FOR BENEFICIATION OF COKING OR NON-COKONG COAL

摘要

An improved process for benefication of coking or non-coking coal comprising the sequential steps of:--(a) loading with coking or non-coking coal, to be processed, a series of movable baskets, running on a guide line, each of said baskets being constitute by an open-top housing with perforated sheet metal or metallic wire net walling and having formed therein two chambers separated by a manually or mechanically operable flap value, and further having a latched bottom made of perforated sheet metal or metallic wire net, said latched bottom being adapted to be opened to cause unloading of the contents of the lower one of said chambers in the event of its latch being subjected to an impact force against a hard surface provided at an unloading zone:(b) separating the coal form the associated impurities by passing said baskets loaded with the coal to a separation zone constituted by a gravity bath made up of finely ground solid suspensions, such as herein described, and during such separation keeping the flap value of each of said baskets open so as to allow the heavier impurities to trickle down through the valve opening and accumulate in the lower chamber, ensuring that the flap valves are closed just before the baskets leave said separation zone; and(c) rinsing the so separated coal by passing the basket through a water-spraying zone, followed by unloading operations of the separated products (both floats and sinks).