浮选柱反浮选脱镁工艺研究  

Reverse Flotation Process for Magnesium Removal Using Flotation Column

作　　者：曹本三郎 张逸 龙秉文[1] 邓伏礼[1] 戴亚芬 丁一刚[1] CAO Bensanlang;ZHANG Yi;LONG Bingwen;DENG Fuli;DAI Yafen;DING Yigang(School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430074,China)

机构地区：[1]武汉工程大学化工与制药学院,湖北武汉430074

出　　处：《化学与生物工程》2020年第7期47-50,68,共5页Chemistry & Bioengineering

基　　金：湖北省技术创新专项重大项目(2018ACA153)。

摘　　要：利用浮选柱对高硅镁中低品位胶磷矿(P2O525.74%、MgO 1.31%、SiO213.79%)进行反浮选脱镁实验,优化了反浮选脱镁工艺,并比较了浮选柱和浮选机的反浮选脱镁效果。确定最佳脱镁工艺条件为:捕收剂用量1.2 kg·t^-1、磷酸用量7 kg·t^-1、充气流量600 L·h^-1、冲洗水流量6 L·h^-1、柱径比8,在此条件下,得到P2O5品位为27.36%、MgO含量为0.64%的精矿,且精矿产率为92.65%,P2O5回收率为98.71%。We carried out the reverse flotation experiments for magnesium removal on middle and low grade phosphate rock with high silica magnesia(P2O525.74%,MgO 1.31%,and SiO213.79%)using flotation column,and optimized the reverse flotation process for magnesium removal.Moreover,we compared the reverse flotation effects of flotation column and flotation machine.The optimal conditions for magnesium removal can be determined as follows:the collector dosage of 1.2 kg·t^-1,the phosphoric acid dosage of 7 kg·t^-1,the aeration flow rate of 600 L·h^-1,the washing water flow rate of 6 L·h^-1,and the column diameter ratio of 8.Under above conditions,the concentrate with P2O5 grade of 27.36%and MgO content of 0.64%can be obtained,meanwhile,the yield of concentrate is 92.65%,and the recovery rate of P2O5 is 98.71%.

关 键 词：浮选柱 反浮选 药剂用量 工艺条件 

分 类 号：TQ126.3[化学工程—无机化工] TD923[矿业工程—选矿]