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Method for flotation of rare earth from Baiyunebo tailings

A technology for tailings and rare earths, applied in flotation, solid separation and other directions, can solve the problems of not effectively recovering useful minerals, insufficient recovery rate of rare earth minerals, only about 70%, etc., and achieves low production cost, high recovery rate, simple method effect

Inactive Publication Date: 2012-01-18
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Method for flotation of rare earth from Baiyunebo tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] For the Baiyun Obo tailings with a rare earth REO grade of 7.02%, using the process technology of the present invention, the tailings are firstly ground until the particle size is -200 mesh and account for more than 95%, and then roughing, four times of beneficiation and The closed-circuit circulation beneficiation process of one-time scavenging performs rare earth flotation operations on the tailings.

[0022] 1) Grinding: use a ball mill to grind the Baiyun Obo tailings until the particle size is -200 mesh, accounting for more than 95%.

[0023] 2) Rough separation: add Baiyan Obo tailings with a rare earth REO grade of 7.02% into the rough separation tank, add water to mix and adjust the slurry to control the mass concentration of the slurry at 46% and start stirring. The temperature of the slurry is 39°C; while stirring Add water glass 1.5kg / t, LF8#2.6kg / t, 318 # The pH of the slurry is 0.12kg / t, and the pH of the slurry is 9.6. The roughed rare earth concentrate a...

Embodiment 2

[0030] For the Baiyun Obo tailings with a rare earth REO grade of 14.36%, using the process technology of the present invention, the tailings are firstly ground until the particle size is -200 mesh and account for more than 95%, and then the primary roughing, three-time beneficiation and secondary The closed-circuit circulation beneficiation process of secondary sweeping is used to perform flotation of rare earth on the tailings.

[0031] 1) Grinding: Use a ball mill to grind the Baiyun Obo tailings until the particle size is -200 mesh, accounting for more than 95%;

[0032] 2) Rough separation: Add Baiyun Obo tailings with rare earth REO grade of 14.36% into the rough separation tank, add water to mix and adjust the pulp to control the pulp concentration at 68% and start stirring. The temperature of the pulp is 70°C; while stirring Add 3.2kg / t of water glass, 3.6kg / t of H2O5, 0.14kg / t of No. 2 oil, and 10.4 of the pH of the slurry to obtain roughed rare earth concentrate and ...

Embodiment 3

[0039] For the Baiyun Obo tailings with a rare earth REO grade of 2.97%, using the process technology of the present invention, the tailings are firstly ground until the particle size is -200 mesh, accounting for more than 95%, and then roughed once and five times selected The closed-loop beneficiation process uses the rare earth flotation operation on the tailings.

[0040] The amount of agent added during flotation is calculated by weight ratio: rough selection: water glass 0.4kg / t, LF10#3.5kg / t, 318 # 0.15kg / t; Yijing: water glass 0.6kg / t, LF10#2.2kg / t, 318 # 0.06kg / t; Erjing: water glass 0.5kg / t, LF10#1.3 / t, 318 # 0.05kg / t; Sanjing: water glass 0.2kg / t, LF10#1.2kg / t, 318 # 0.05kg / t; four essences: water glass 0.4kg / t, LF10#1.5kg / t, 318 # 0.05kg / t; Wujing: water glass 0.2kg / t, LF10#0.8kg / t, 318 # 0.05kg / t. The mass concentration of the roughing pulp is controlled at 30%, the pulp temperature is 63°C, and the pH of the pulp is 9.0; the mass concentration of the refined ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03B1/00
Inventor 李梅柳召刚高凯张栋梁胡艳宏王觅堂张晓伟
Owner INNER MONGOLIA UNIV OF SCI & TECH
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