Bastnaesite beneficiation process

Abstract

The invention discloses a beneficiation process applicable to bastnaesite of a weathered layer. The process comprises steps as follows: a, strong magnetic separation is performed; b, concentrate pulp after strong magnetic separation is concentrated to the mass concentration of 30%-50%; c, the concentrated pulp is subjected to floatation; d, flotation concentrate is subjected to strong magnetic separation to obtain rare earth ore concentrate with 50%-72% of REO (rare earth oxide). The process adopts procedures of magnetic separation, floatation and later magnetic separation, is suitable for conventional bastnaesite, and is particularly suitable for the bastnaesite located on the weathered layer; the problem that rare earth in the bastnaesite of the weathered layer is difficult to recover due to the fact that argillization and powdering are severe and coarse and fine rare-earth minerals are obviously inlaid in a non-uniform manner in the prior art is solved, the rare earth grade is guaranteed, the rare earth recovery rate is guaranteed, excessive waste of rare earth is avoided, the cost is low, the benefit is high, and the bastnaesite beneficiation process has higher economic and social benefits and is worthy of popularization and application.

Description

technical field [0001] The invention belongs to the field of mineral processing technology, and in particular relates to a bastnaesite mineral processing process located in a weathered layer. Background technique [0002] The possession of rare earths in the Panxi region of Sichuan ranks second in the country. The Dechang Dalucao rare earth mine and the Mianning Maoniuping rare earth mine in this area are the most important single bastnaesite-type rare earth resources in China. Mianning Maoniuping rare earth ore is a relatively conventional rare earth ore. It was discovered early, has a deep research level, and has a coarse embedded particle size. It is relatively easy to obtain high-quality rare earth concentrates through simple beneficiation processes. The main rare earth mineral in Dechang Dalutrao Rare Earth Mine is bastnaesite, which is located in the weathered layer and is severely altered by surface weathering. Due to weathering, the particle size becomes finer and t...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a beneficiation process of bastnaesite, which is mainly aimed at the serious pulverization of bastnaesite in the weathered layer, and the phenomenon of obvious uneven distribution of rare earth minerals. The rare earths caused by this are difficult to recycle and the problem of low recovery rate

Images