ABSTRACT

The large loss of fine-grained bastnaesite has become an increasingly important issue restricting the development of rare earth ore flotation industry. To solve this issue, a new collector mixture that combines octyl hydroxamic acid (OHA) and octyl phenol ethoxylation (OP10, the number of ethylene oxide groups is 10) is proposed to be used to improve the flotation of bastnaesite. The flotation adsorption mechanism of OHA/OP10 on bastnaesite was investigated by a series of experimental and analytical tests. The results showed that when the molar ratio of OHA/OP10 was 3:1, the OHA/OP10 combination significantly improved the recovery of −74 + 38 μm and −15 μm bastnaesite compared with only OHA. Optical microscopy revealed that mixed OHA/OP10 had a beneficial effect on fine-grained bastnaesite aggregation. In addition, the results of the zeta potential test, fluorescence spectrum analysis, and XPS analysis showed that OHA and OP10 were co-adsorbed on the surface of bastnaesite.

摘要

细粒氟碳铈矿大量流失已成为制约稀土矿浮选行业发展的日益重要的问题。为了解决这个问题，提出了一种结合辛基异羟肟酸（OHA）和辛基酚乙氧基化（OP10，环氧乙烷基团数为10）的新型捕收剂混合物来改善氟碳铈矿的浮选。通过一系列实验和分析测试研究了OHA/OP10在氟碳铈矿上的浮选吸附机理。结果表明，当OHA/OP10摩尔比为3:1时，与单独使用OHA相比，OHA/OP10组合显着提高了-74+38μm和-15μm氟碳铈矿的回收率。光学显微镜显示混合的 OHA/OP10 对细粒氟碳铈矿聚集有有益的影响。此外，