包钢稀土尾矿中稀土矿物的浮选再回收  

Flotation Recovery of Rare Earth Minerals in Baotou Steel Rare Earth Tailings

作　　者：张悦[1,2] 林海[1,2] 董颖博[1,2] 李国栋[1,2] 王鑫[1,2] 许晓芳[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《金属矿山》2016年第3期176-179,共4页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:2012AA062402)

摘　　要：包钢稀土尾矿中的稀土矿物有较高的再回收价值。对-74μm粒级产率为77.73%、REO品位为5.97%、主要稀土矿物氟碳铈矿和独居石含量分别达4.10%和3.80%的包钢稀土尾矿试样进行了浮选再选试验。结果表明,在磨矿细度为-74μm占95%,粗选矿浆浓度为40%,矿浆温度为30℃,粗选Na OH用量为3 000 g/t,水玻璃用量为2 000 g/t,H205+LD用量为400+300 g/t情况下,采用1粗3精2扫、中矿顺序返回流程处理试样,获得了REO品位为45.08%、REO回收率为75.27%的稀土精矿。The rare earth minerals in Baotou Steel rare earth tailings have great value. The yield of-74 μm of tailings is77. 73%. REO content of tailings is 5. 97%. The main rare earth minerals are bastnaesite and monazite,the content of which are 4. 40% and 3. 80% respectively. Reconcentration by flotation experiments on the tailings were carried out. The results indicated that,under conditions of the grinding size of 95% passing 74 μm,pulp concentration of 40% and pulp temperature at 30℃,Na OH dosage of 3 000 g / t,silicate sodium dosage of 2 000 g / t,H205 ＋LD dosage of 400 ＋300 g / t,rare earth concentrate was obtained by using process of one roughing,three cleaning,one scavenging,and middles back to the flowsheet in turn. The final concentrate REO grade is 45. 08% and recovery is 75. 27%.

关 键 词：稀土尾矿 浮选 再回收 

分 类 号：TD923.7[矿业工程—选矿]