三产品重介质选煤工艺在唐山春澳选煤厂的应用  

Application of three products heavy medium coal preparation process in Tangshan Chun'ao coal preparation plant

作　　者：白景启[1] 邢玉梅[1] 陈艳春[1] 

机构地区：[1]天地科技股份有限公司唐山分公司,河北唐山063000

出　　处：《洁净煤技术》2013年第3期26-29,共4页Clean Coal Technology

摘　　要：针对唐山春澳选煤厂煤源复杂、煤质波动大等特点,为了最大程度地回收精煤产率,通过分析重介与跳汰、预先脱泥入选与不脱泥入选、有压给料与无压给料的优缺点,确定选煤厂主选方法为不脱泥无压入料的三产品重介质旋流器分选工艺。通过对螺旋分选机、干扰床分选机(TBS)及煤泥重介质旋流器等粗煤泥分选工艺的对比,确定采用煤泥重介分选工艺分选粗煤泥。最终确定唐山春澳选煤厂采用无压给料三产品重介质旋流器+煤泥重介+浮选分选工艺,尾煤煤泥水浓缩压滤,全厂洗水实现闭路循环,整个分选工艺具有产品系统及煤泥水处理灵活可变的特点。唐山春澳选煤厂试车结果表明:三产品重介质旋流器的重介悬浮液入口压力达到0.2 MPa,矸石带煤率小于1%,分选效果良好;精煤灰分在10%以下,中煤灰分约为35%,矸石灰分在70%以上;介耗较低,处理量稳定在160 t/h,也可达到200 t/h。Complex coal resources and wide coal quality fluctuation in Tangshan Chun＇ao coal preparation plant led to lower clean coal yield. Analyse the advantages and disadvantages of dense-medium separation and jigging, pre- desliming and undesliming separation, pressurized feeding and unpressurized feeding, then determine the main preparation process is three products heavy medium cyclone process, which is undesliming and unpressurized feeding. By comparing spiral,TBS and dense medium cyclone, adopt the last one to prepare slime. At last, combining the above two techniques as the proper preparation technology of Tangshan Chun ＂ao coal preparation plant. The slime water of tailings is concentrated by filters, the washing water is recycled. The adjustment of products and slime water treatment system is flexible. The results show that, the inlet pressure of three products dense medium cyclone can reach up to 0. 2 MPa,the coal mixed in gangue is less than 1 percent,the ash of clean coal and gangue is re- spectively less than l0 percent and 70 percent, the ash of middings is 35 percent, the handing capacity stabilize around 160 t/h,sometimes can reach up to 200 t/h.

关 键 词：三产品重介质旋流器 粗煤泥分选 煤泥重介分选 浮选 介耗 

分 类 号：TD942.7[矿业工程—选矿]