旋流微泡浮选柱在涡北选煤厂的应用  

Application of cyclon micro bubble flotation column in Wobei coal preparation plant

作　　者：冯立品[1] 周孟颖[1] 徐晓琦[1] 

机构地区：[1]安徽省煤炭科学研究院,安徽合肥230001

出　　处：《洁净煤技术》2011年第6期10-13,共4页Clean Coal Technology

摘　　要：分析了涡北选煤厂煤泥粒度组成,发现煤样矸石存在泥化现象,高灰细泥含量较高,对浮选不利。进行了浮选机的单因素浮选试验、两因素三水平正交试验以及最优药剂条件下的分步释放试验,同时进行了浮选柱的煤泥浮选试验。结果表明,当煤泥矿浆质量浓度为45 g/L,复合药剂为1.10 kg/t时,精煤灰分为10.97%,精煤产率为72.62%,浮选完善指标最高为53.43%,浮选机煤泥浮选效果最好;浮选柱可以分选出各种质量的精煤,精煤灰分可调性大,可以适应市场变化。最后进行了浮选机和浮选柱的综合对比试验,在精煤灰分相近的情况下,浮选柱不同程度地提高了精煤回收率和浮选完善指标,具有明显优势。According to analysis of the size composition of coal slime,find that coal gangue pelitization,high content of high-ash fine mud are bad for flotating.Single facter flotation tests of flotation machine,two factors and three levels orthogonal tests,substep releasing tests with the optimal mixture of flotation reagents have been taken.The results show that,while the mass concentration of coal slime pulp is 45 g/L and mixture flotation reagents is 1.10 kg/t,clean coal ash could reaches 10.97%,productivity of clean coal is 72.62%,improved flotation index is up to 53.43% and the flotation machine works best.The flotation column could seperate all kinds of fine coal,fine coal ash could be adjusted in wide range in order to meet the requirements.The comprehensive contrast tests of flotation machine and flotation column are taken at last,disposing the same clean coal ash,the results show that flotation column could highly improve clean coal recovery and flotation index compared with the flotation machine.

关 键 词：旋流微泡浮选柱 浮选机 正交试验 分步释放 精煤灰分 

分 类 号：TD923[矿业工程—选矿]