DZX-9捕收剂浮选冕宁低品位氟碳铈矿试验研究

氟碳铈矿型稀土矿浮选,一般需脱泥预处理后用芳香烃羟肟酸或改性羟肟酸等捕收剂在一定条件下浮选可获得合格的氟碳铈精矿1-3]。四川冕宁三岔河低品位氟碳铈矿型稀土矿含泥高,REO品位仅为1.65%,氟碳铈矿呈不等粒嵌布,矿物组成相对复杂。以弱磁选-重选后所得到的粗精矿(简称重精矿,REO品位为3.73%)为研究对象。研究结果表明,采用常规浮选捕收剂难以获得满意效果,采用自研DZX-9为捕收剂,在pH=8～9,碳酸钠、水玻璃为调整剂,经一次粗选、一次扫选和二次精选,实验室小型浮选闭路试验可获得精矿产率为5.70%,REO品位为60.31%,REO回收率为92.16%较好的技术指标。

Experimental Research on Flotation of the Low-grade Bastnaesite in Mianning

The flotation of the bastnaesite type rare earth ore requires the flotation using the collectors of arbon hydroximic acid or modified hydroximic acid after desliming pretreatment to obtain the qualified bastnaesite concentrate.This kind of ore in Sanchahe Mianning Sichuan has the characteristics that the content of mud is high,the grade of REO is only 1.65%,the bastnaesite is disseminated unequally and the mineral composition is very complex.The rough concentrate(shorted as gravity concentrate)with the grade of REO as 3.73%obtained from low-intensity magnetic separation—gravity separation was chosen as the research object.The results show when the collector of DZX-9 was adopted,under the condition of that the value of pH is 8～9,sodium carbonate and water glass were acted as regulators,through one roughing,one scavenging and two cleaning,the closed-circuit flotation test can get the concentrate with the yield of 5.70%,the REO grade of 60.31%and the recovery of 92.16%.The technical index is good.