泉店选煤厂工艺系统的改造

Technological reformation of Quandian coal preparation plant

针对泉店选煤厂精煤产率低,介耗高,浮选效果差、药耗高及循环水浓度高等问题,通过增加粗煤泥分选系统,将脱泥筛筛网孔径由0.75 mm改为1.00 mm,采用干扰床分选机(TBS)和德瑞克高频细筛分别替换高频筛和高频振动脱水筛;用浮选机替换浮选床,增加NFH系列电磁式药液定量注入泵自动添加浮选药剂;采用新型有机凝聚剂TLT8840配合有机絮凝剂TLT8623替换原普通絮凝剂,设计自动加药系统等措施对选煤厂进行了改造。改造后选煤厂粗精煤脱水效果明显改善,缓解了浮选系统分选压力,解决了煤泥水跑粗问题;精煤总产率提高了1.20%,尾煤灰分高达55.18%,浮选药耗由0.86 kg/t降至0.64 kg/t;尾煤浓缩药剂降低了10 g/t,循环水质量浓度降低了22 g/L,介耗降低了20%。同时选煤厂每年可增收3056.4万元,经济效益显著。

There were many problems in the original process of Quandian coal preparation plant, the clean coal yield was low, medium and drug consumption was high as well as the concentration of circulating water. To resolve these problems,sort coarse slime separately, broaden the seam of partial sieve from 0.75 mm to 1.00 mm; replace the high-frequency screen and high-frequency vibrating dehydration screen with TBS and Dirick fine sieve, replace the flotation bed with flotation machine, add NFH electromagnetic automatic flotation reagent injection pump, adopt TLT8840 organic cohesion agent with TLT8623 flocculants instead of original flocculants, design automatic dosing system. After transformation, the coarse and clean coal can be better dewatered, reduce the handing capacity of flotation system, avoid the coarse slime sneaking into slime water. The recovery rate of clean coat increase by 1.20 percent, the ash of railings reach up to 55. 18 percent, the flotation reagents decrease from 0. 86 kg/t to 0.64 kg/t. The concentration agent for tailings, circulating water concentration, and medium consumption reduce by 10 g/t, 22 g/L and 20 percent respectively. The economic benefits of coal preparation plant increase by 3. 0564x107 yuan per year.