A kind of low chloride radical rare earth carbonate processing method

Abstract

The invention relates to a process technology of rare earth metallic compounds, and discloses a processing method for rare earth carbonate with low chlorine ions. The processing method comprises the steps as follows: step 1, preparation of rare earth carbonate: rare earth carbonate is extracted from a rare-earth chloride solution; step 2, burning treatment: rare earth carbonate is added into a material bowl which is then placed into a tunnel kiln for burning to further remove the chlorine ions in rare earth carbonate; and step 3, packaging and sampling: the material bowl after burning treatment is taken out of the tunnel kiln and cooled, then the material bowl is removed, and the prepared rare earth product is packaged and sampled. According to the processing method for rare earth carbonate with low chlorine ions, repeated warm water washing and repeated burning processes are adopted, and a purified water adding step is performed before burning, so that the content of chlorine ions in the rare earth is reduced effectively.

Description

technical field [0001] The invention relates to a rare earth metal compound processing technology, in particular to a low chloride rare earth carbonate processing method. Background technique [0002] The heavy rare earth solution after mixed rare earth grouping, if used as a finished product, needs to undergo precipitation treatment to turn it into a solid phase. At present, there are two commonly used precipitation methods: one is oxalic acid precipitation, which has large precipitated particles and small impurities, but the price of oxalic acid is high and toxic, which will pollute the environment; moreover, the solubility of oxalate is large, which affects the recovery of rare earths Rate. Therefore, this precipitation method with high precipitation cost and high difficulty in secondary separation is not practical. The other is carbonate precipitation, which has low precipitation cost, small solubility product of rare earth carbonate, and convenient follow-up treatment...

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a low-chloride rare earth carbonate processing method to solve the problem of high chloride content in rare earth carbonate

Images