摘要
粗煤泥的高效分选一直是选煤厂技术管理追求的目标,通过分析同忻煤矿选煤厂TBS尾煤性质,针对磨后煤泥浮选精煤回收率低的问题,采用高速调浆浮选、选择性絮凝浮选以及"一粗一精"两段浮选三种工艺分别对浮选过程进行强化。结果表明,随着磨矿时间的增加,适宜浮选的0.045~0.125mm粒度级产率在15min时达到峰值54.43%;TBS尾煤磨矿后常规浮选精煤产率较低,仅为28.73%,采用上述三种改进工艺分别使精煤产率提高至33.79%、37.25%和37.04%;但三种改进工艺具有各自的缺点,比如增加或者更换设备、药剂消耗增加等,需要根据实际生产情况进行工艺选择。
The high-efficiency separation of coarse slime has always been the goal of the technical management of coal preparation plant.Aiming at the low recovery rate of clean coal in post-grinding flotation,according to the properties of TBS tailings in Tongxin Coal Mine Coal Preparation Plant,high-speed pulp conditioning flotation,selective flocculation flotation,and a roughing-cleaning two-stage flotation are used respectively to strengthen the flotation process.The results show that,as grinding time increases,the yield of 0.045~0.125 mm particle size fraction suitable for flotation reaches its peak of 54.43%at 15 minutes;the clean coal yield in conventional flotation of ground TBS tailings only 28.73%,which can be enhanced using the above three processes to 33.79%,37.25%,and 37.04%,respectively;while the three flotation strengthening processes have their own shortcomings,such as adding or replacing equipment,increasing agents consumption,which need to be adjusted according to specific situation in production.
作者
李强
侯晓超
LI Qiang;HOU Xiao-chao(Jinneng Holding Coal Industry Group Dadi Coal Preparation Engineering(Datong)Co.,Ltd.,Datong 037003,China)
出处
《煤炭工程》
北大核心
2021年第S01期117-121,共5页
Coal Engineering
关键词
干扰床分选机
浮选
调浆
选择性絮凝
浮选过程强化
teeter bed separator
flotation
pulp conditioning
selective flocculation
flotation strengthening