组合药剂对微细粒氟碳铈矿与萤石的浮选分离效率的影响

Effects of Combined Reagents on Flotation Separation Efficiency of Fine Bastnaesite and Fluorite

通过单矿物浮选与人工混合矿浮选、Zeta电位及接触角测试,研究了复合捕收剂(辛基羟肟酸(OHA)+辛基酚聚氧乙烯醚(OP-10))和组合抑制剂(水玻璃+乙二胺四乙酸(EDTA))对-15μm微细粒氟碳铈矿与萤石浮选分离效果的影响及作用机制。结果表明:OP-10能够显著提高OHA对微细粒氟碳铈矿的捕收能力;组合抑制剂对萤石的选择性抑制效果优于单一抑制剂;使用复合捕收剂与组合抑制剂相对于仅使用单一捕收剂与抑制剂水玻璃,氟碳铈矿与萤石的浮选分离指数由2.41提高至7.0,同时捕收剂OHA用量由1.5×10^(-4) mol·L^(-1)降低至1.2×10^(-4) mol·L^(-1);Zeta电位测试表明,EDTA能够有效抑制复合捕收剂在萤石表面的吸附,而对氟碳铈矿的影响较弱;接触角测试表明,复合捕收剂与EDTA能够强化氟碳铈矿与萤石的表面疏水性差异,提高浮选分离效果。

The effect of mixed collectors(Octylhydroxamic acid(OHA)and octylphenol ethoxylated(OP-10))and combined inhibitors(sodium silicate and ethylenediaminetetraacetic acid(EDTA))on the flotation separation of bastnaesite from fluorite and the separation mechanism were studied by single mineral flotation,artificial mixed minerals flotation,zeta potential,and contact angle measurements.The results show that OP-10 significantly improves the collecting ability of OHA in the recovery of micro-grained bastnaesite.Combined inhibitors have a better inhibition effect on fluorite than a single inhibitor.The flotation separation index of bastnaesite and fluorite decreases from 2.41 to 7.0 when using mixed collectors and combined inhibitors,and the dosage of OHA decreases from 1.5×10^(-4) to 1.2×10^(-4) mol·L^(-1).Zeta potential test shows that EDTA can effectively prevent the adsorption of mixed collectors on fluorite surface but have a weak effect on bastnaesite.Contact angle test shows that mixed collectors and EDTA can enhance the difference of surface hydrophobicity of bastnaesite and fluorite and improve their flotation separation efficiency.