Rare earth precipitation device and rare earth precipitation method

Abstract

The invention provides a rare earth precipitation device and a rare earth precipitation method. The rare earth sedimentation device comprises a precipitation container, a feeder, a stirrer and a sealing cover; the precipitation container is provided with a body and a containing cavity defined by the body; the feeder is used for supplying rare earth liquid and a precipitating agent to the containing cavity of the precipitation container; the stirrer is provided with a stirring paddle, and the stirring paddle is arranged in the containing cavity; and the sealing cover is detachably arranged at the top of the body to seal the containing cavity. According to the rare earth precipitation device and the rare earth precipitation method, through the arrangement of the sealing cover, the pressure in a reaction space is increased, the forward implementation of a precipitation reaction is strengthened, the formation of crystallites is promoted, meanwhile, the growth rate of precipitated crystalsis decreased, precipitated samples are relatively small in particle size and low in crystallization rate, and fewer impurities are contained in the precipitated samples; then closed operation can improve the operating environment, the precipitating agent and the rare earth liquid participate in the reaction in a relatively stable ratio, and the use efficiency of the precipitating agent is improved; and finally, the closed operation can increase the stirring strength, liquid-phase pH distribution is uniform, and crystal particle size growth is promoted to be more uniform.

Description

technical field [0001] The invention relates to the field of rare earth production, in particular to a rare earth precipitation device and a rare earth precipitation method. Background technique [0002] After the rare earth ore goes through the leaching and extraction steps in the later stage of the production process, the rare earth feed liquid needs to be purified by precipitation. In the precipitation process, there are positive sequence feeding, co-feeding and reverse sequence feeding. Different feeding methods have effects on the crystal form, crystal size and distribution of the precipitate. Adding the rare earth precipitant to the rare earth feed liquid in the forward sequence feeding or adding the rare earth feed liquid to the rare earth precipitant in the reverse sequence feeding will affect the precipitation quality of rare earth precipitated crystals due to the high concentration of a certain reactant in the local area, and then affect the subsequent filtration ...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a rare earth precipitation device and a rare earth precipitation method to solve the problem of unstable quality of rare earth crystals obtained by the rare earth precipitation device in the prior art

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