Effects of Ammonium Salts on Rare Earth Leaching Process of Weathered Crust Elution-Deposited Rare Earth Ores

In order to reveal the influence of ammonium salts on rare earth leaching process weathered crust elution-deposited ores, acetate, chloride, and sulfate were used as agents. The effects agent efficiency expansion, dissolution, transformation behavior clay minerals in studied. results showed that followed acetate > chloride sulfate, with values 90.60%, 85.96%, 84.12%, respectively. swelling ratio mineral < sulfate; was 2.09% when agent. Thermogravimetric analysis interlayer water content lowest Under conditions different agents, contents changed from illite halloysite smectite kaolinite. When agent, relative conversion 1.49%, only 0.17%. SEM expanded dissolved obviously Meanwhile, layered structure relatively complete Therefore, it had least effect swelling, minerals. This can provide a theoretical basis for safe production ore, screening green efficient