申家庄煤矿选煤厂粗煤泥分选系统改造

Transformation of coarse slime separation system of Shenjiazhuang coal preparation plant

针对申家庄煤矿选煤厂粗煤泥含量高引起的浮选尾矿跑粗、高中损、高介耗等问题,结合TBS分选原理及应用效果,采用TBS干扰床分选机对粗煤泥分选系统进行改造。具体措施为:加大原煤脱泥筛入料水冲溜槽的流量和冲洗力度,筛前段加设分流板,提高脱泥筛的脱泥效率;缩短倾斜板浓缩机的倾斜板间距,提高倾斜角度,减少溢流中粗颗粒含量;更换小筛孔筛板,增加喷水设备,提高脱介效率。改造后倾斜板浓缩机溢流中+0.500 mm粗颗粒产率由10.10%降为2.10%,改造效果明显;浮选压力明显降低,提高了精煤产率;TBS对粗煤泥分选效果良好,精煤质量和产率均大幅提高;介耗降低1.11 kg/t,中损降低4.76%。

Due to high coarse slime content in Shenjiazhuang coal preparation plant, there were lots of problems such as coarse flotation tailings, high middlings loss and dense medium consumption. Based on the separation principle and application effects of TBS, transform the coarse slime separation system with TBS. Increase the raw coal desliming sieve water chute flow as well as flushing strength, add diversion plate in order to improve the efficiency of desliming sieve. Shorten the inclined plate spacing of inclined plate thickener, improve angle of inclination to reduce the content of coarse soil particle in overflow. Replace the small mesh sieve plate and increase the water jet equipment to improve the efficiency of dense medium. The results show that, after transformation, the yield of ＋ 0. 500 mm coarse grain in inclined plate thickener overflow decrease from 10. 10 percent to 2. 10 percent. Flotation pressure reduce significantly and the clean coal recovery rate increase obviously. TBS for coarse coal slime has great separation effects. Dense medium consumption and middlings loss decrease by 1.11 kg/t and 4. 76 percent respectively.