Method for flotation of rare earth from Baiyunebo tailings

Abstract

The invention relates to a method for flotation of rare earth from Baiyunebo tailings and belongs to the field of ore dressing. The method is characterized by adopting the following steps: firstly, performing ore grinding on the Baiyunebo tailings till the tailings in the particle size of -200 meshes account for above 95%; then performing pulp mixing and flotation on the tailings subjected to the ore grinding, wherein the flotation comprises rougher flotation, concentration and scavenging, and the series of the flotation is determined according to the grade of the rare earth in the tailings and the final requirements on the grade of rare earth concentrate; and sequentially returning middlings generated by the flotation to the upper stage of the flotation. The adopted reagent system is as follows: water glass is taken as an inhibitor, a hydroxamic acid type collector is taken as the collector, and No.2 oil or No. 318 oil is taken as a foaming agent. The method is simple, the production cost is low, the pollution is avoided, the recovery rate of the rare earth is high, the finally obtained tailings can also be used as the raw material for separating other minerals and the comprehensive utilization of resources is realized.

Description

technical field [0001] The invention relates to a method for flotation rare earth from Baiyunebo tailings, which belongs to the field of ore dressing. Background technique [0002] Baiyan Obo tailings refers to the tailings formed by Baotou Iron and Steel Co., Ltd. using Baiyan Obo ore as raw material after iron and rare earth selection. It also includes a considerable part of tailings formed only after iron selection. These tailings are mixed together and piled up in the In the tailings dam, after 50 years of slow accumulation, the tailings stockpile has exceeded 200 million tons, and it is still increasing. [0003] Baiyun Obo Mine is a rare super-large polymetallic paragenetic ore in the world, rich in iron, rare earth, fluorite, niobium and other useful minerals. The recovery rate of rare earth minerals is only about 70% up to now, and the recovery rate of the most valuable rare earth minerals is less than 20%, and there are still many useful minerals that have not been...

AI Technical Summary

Problems solved by technology

[0003] Baiyun Obo Mine is a rare super-large polymetallic paragenetic ore in the world, rich in iron, rare earth, fluorite, niobium and other useful minerals. The recovery rate of rare earth minerals is only about 70% until now, and the recovery rate of the most valuable rare earth minerals is even less than 20%, and there are still many useful minerals that have not been effectively recovered, and all these minerals that have not been recovered are used as tailings. The form is piled up in the tailings dam, forming the huge reserves of Baiyun Obo tailings

This not only puts a huge pressure on the surrounding ecological environment, but also causes a huge waste of resources

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