Study of Optimization Control of Ion-type Rare Earth Ore Leaching Process.

This paper takes ionic rare earth ore, from Jiangxi Ganzhou Zhudong, as the research object, using indoor column leaching method to carry out optimal adjustment of the ore leaching process, investigating the effect of various process factors and result analysis of ion-type rare earth ore before leaching and after leaching. The results show that, when the raw ore about 0.056% rare earth ore, the moisture content is 4%, the ore seam height is 43mm, leaching agent concentration is 4%, leaching solution pH value is 5.0, solid-liquid ratio is 1:0.8, flow rate is 3 mL/min. We can acquire through the test that leaching rate of rare earth is 94.32%, average concentration of rare earth in leaching solution is 1.58 g/L. There are only ion exchange reaction between rare earth ions and electrolyte. Cationic polyelectrolyte is retained in leaching residue when rare earth ions is exchanged leaching. The whole leaching process did not produce other new substance. There was only ion exchange reaction, with no natural crystal texture of rare earth ore change. [ABSTRACT FROM AUTHOR]