A new coal tailings washing plant

摘要

Older coal dumps aside of ceased coal mines in Western European Countries very often contain schistose rejects, which, when,, washed", produce leftover coal in a quantitity that varies between 6percent - 12percent of retrieved coal. For this particular purpose the Belgian company EXTERBEL developed and established a new technology, washing in two stages in a dense suspension, created with a pulp made up of sludge and water. The material in the first stage is separated gravimetrically in a scrolled barrel, then by centrifugal forces in cyclone systems. The coal then is drained and dried, the shist reintegrated to match the local terrain on the site. The system is very flexible and economic, working in closed circuits, easy to handle, environmentally excellent and more or less applicable for most raw material processing purposes.