Leaching Mechanism of Aluminum during Column Leaching of Ion-Adsorption Rare Earth Ore Using Magnesium Sulfate

Aluminum is a significant impurity in the ion-adsorption rare earth ore. The changes occurrences of aluminum have great influence on leaching In this paper, column method was employed using magnesium sulfate as agent to investigate effects pH and concentration earths. results show that at low concentrations, earths greatly enhanced, while not significantly affected by decrease agent. At high slight increase observed, accompanied upon decreasing behavior related during process. promotes transition Hy-Al Sol-Al, but due Mg2+ agent, Sol-Al back-adsorbed onto clays transformed into Ex-Al, resulting no content leach solution. However, higher solution comes mainly from transformation Ex-Al. Lowering can promote thereby increasing above provide theoretical support for optimization situ ore sulfate.