Beneficiation method of high-mud micro-fine particle rare earth minerals

Abstract

The invention relates to a beneficiation method of high-mud micro-fine particle rare earth minerals. The beneficiation method includes the following steps that magnetic separation is carried out afterreselection to obtain magnetic separation concentrates and magnetic separation tailings; classification of the magnetic separation concentrates is carried out, wherein the magnetic separation concentrates in the +A size fraction are subjected to spiral chute reselection and shaker reselection to obtain shaker rare earth concentrates and shaker tailings, the magnetic separation concentrates in the-A size fraction is subjected to slurry adjusting, and one-time flotation roughing, one-time flotation sweeping and one-time blank selection are carried out to obtain flotation coarse concentrates; and the flotation coarse concentrates are subjected to reselection to obtain centrifugal reselection rare earth concentrates and centrifugal reselection rare earth middlings, and the shaker rare earthconcentrates and the centrifugal reselection rare earth concentrates are combined into total rare earth concentrates. By means of the beneficiation method, the processing capacity per unit area is high, the sorting efficiency is high, and the floor space is saved. The method combining flotation and reselection is adopted, the consumption of flotation reagents is small, the cost is low, the mineralseparation enrichment ratio is high, and the rare earth recovery rate is high.

Description

technical field [0001] The invention relates to the technical field of ore dressing, and more specifically, relates to a method for beneficiating high-mud fine-grained rare earth minerals. [0002] technical background [0003] Known as "industrial vitamins", rare earths are widely used in petroleum, chemical industry, metallurgy, permanent magnet materials and other fields, and are strategic resources for economic and military development. my country is a country with a large amount of rare earth resources, among which Sichuan is the second largest province of rare earth resources in my country. Light rare earths are mainly distributed in Mianning County and Dechang County of Liangshan Prefecture. The main rare earth minerals are bastnaesite and bastnaesite , monazite, allanite, etc. The surface raw ore of rare earth deposits is often severely weathered, with high content of primary slime and fine-grained rare earth minerals, which is complex and difficult to separate, and w...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects and deficiencies of high mud and fine-grained rare earth minerals in the existing technology of high cost, low sorting efficiency, and low recovery rate, and to provide a high-mud fine-grained rare earth minerals beneficiation method