Abstract:

Abstract:Shen Jiazhuang coal preparation plant wash raw coal from coal mine’s own,belong to rich coal and which is the rare kinds of coal in domestic. According to the national energy policy,the coal was required to wash into the whole class,in order to improve the washing efficiency and Implementation of maximizing recycling. Three products pressure heavy medium cyclone was used to separating 50-0.3mm raw coal,and -0.3mm coal was separated by slime flotation process,so that, the process system has the features such as simple、high stability、low production and operation cost and strong adaptability to changes of coal. However,coarse slime have the minimum separation efficiency because of being the junction of effective particle size range between gravity separation and flotation separation. Therefore,coarse slime separation scheme with Teetered Bed Separator（TBS） was used，which maked the raw coal desliming screen undersize directly into TBS with classification and separation. So that,heavy medium coal preparation system under limit of separation was improved,with the result of improving the separating efficiency,reducing heavy medium consumption, and reducing the load of flotation machine and pressure filter.

Key words: Key words: Teetered Bed Separator, coarse slime separation, Separation size, reduce medium consumption, improve the efficiency of separation