Abstract: Based on the size composition of coal slime in Panyi coal preparation,analyzed the negative effect of high ash content fine slime on separation process,presented technological process of pre-desliming plus pulp conditioning and two times flotation and emphasized on the structures,working principles process result of feed desliming pool,atomizing drop pulp conditioner and FJC jet flotation machine which are the key equipment in flotation system.The production practice show that the desliming and two times flotation process obtained good effect in Panyi coal preparation,this process have features of simple in system,high efficiency for equipment,low consumption in power and flotation agent and high quality for product.