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Technique of improving rare earth recovery rate and fluorite grade in tailings

A process method, fluorite technology, applied in solid separation, flotation, etc., can solve the problem of low recovery rate, achieve the effect of improving fluorite grade and rare earth recovery rate

Inactive Publication Date: 2014-06-04
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the production of rare earth concentrates with a product grade greater than 60%, the recovery rate will be lower, so for the sake of plant efficiency, generally do not produce rare earth concentrates with a product grade of more than 60%

Method used

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  • Technique of improving rare earth recovery rate and fluorite grade in tailings
  • Technique of improving rare earth recovery rate and fluorite grade in tailings
  • Technique of improving rare earth recovery rate and fluorite grade in tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In the present embodiment, the technological method of improving rare earth recovery rate and fluorite grade in the tailings comprises the following steps:

[0051] 1) Mixed flotation

[0052] Such as figure 1 Shown is the flow chart of the mixed flotation process; in the mixed flotation process, the pH is 10-11, and the temperature is 25°C. Mixed flotation includes a rough selection, a second sweep and four refinements.

[0053] Roughly select 250g of Baiyan Obo tailings with a REO grade of 7.00% or more and a fluorite grade of 11.5% or more, and add Na 2 CO 3 30ml, water glass 20ml, and collector 50ml to obtain the roughing concentrate and roughing tailings, and the roughing concentrate continues to be selected for the first stage.

[0054] The rougher tailings are ground, and the particle size reaches -200 mesh, accounting for more than 96.8%.

[0055] The tailings after grinding are subjected to the first-stage scavenging, adding 10ml of water glass and 20ml of...

Embodiment 2

[0083] In the present embodiment, the technological method of improving rare earth recovery rate and fluorite grade in the tailings comprises the following steps:

[0084] 1) Mixed flotation

[0085] Such as figure 1 Shown is the flow chart of the mixed flotation process. In the mixed flotation process, the pH is 10-11 and the temperature is 30°C. Mixed flotation includes a rough selection, a second sweep and four refinements.

[0086] Roughly select 250g of Baiyan Obo tailings with a REO grade of 7.00% or more and a fluorite grade of 11.5% or more, and add Na 2 CO 3 32ml, water glass 18ml, and collector 52ml to obtain the roughing concentrate and roughing tailings, and the roughing concentrate continues to be selected for the first stage.

[0087] The rougher tailings are ground, and the particle size reaches -200 mesh, accounting for more than 96.8%.

[0088] The tailings after grinding are subjected to the first-stage scavenging, adding 9ml of water glass and 21ml of c...

Embodiment 3

[0116] In the present embodiment, the technological method of improving rare earth recovery rate and fluorite grade in the tailings comprises the following steps:

[0117] 1) Mixed flotation

[0118] Such as figure 1 Shown is the flow chart of the mixed flotation process. In the mixed flotation process, the pH is 10-11 and the temperature is 28°C. Mixed flotation includes a rough selection, a second sweep and four refinements.

[0119] Roughly select 250g of Baiyan Obo tailings with a REO grade of 7.00% or more and a fluorite grade of 11.5% or more, and add Na 2 CO 3 29ml, water glass 21ml, and collector 49ml to obtain the rougher concentrate and rougher tailings, and the rougher concentrate continues to be selected for the first stage.

[0120] The rougher tailings are ground, and the particle size reaches -200 mesh, accounting for more than 96.8%.

[0121] The tailings after grinding are subjected to the first-stage scavenging, adding 12ml of water glass and 18ml of col...

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Abstract

The invention discloses a technique of improving rare earth recovery rate and fluorite grade in tailings, and the technique of improving rare earth recovery rate and fluorite grade in tailings comprise the following steps of : (1) mixing foam and mixing tailings are obtained through level one roughing, multistage of scavenging and multistage of refined selection of the tailings raw material; (2) total rare earth enrichment content and total fluorite enrichment content are obtained by separating the mixing foam; (3) rare earth concentrate is obtained through the level one roughing, multistage of scavenging and multistage of refined selection of the total rare earth enrichment content; (4) fluorite concentrate is obtained through the level one roughing, multistage of scavenging and multistage of refined selection of the total fluorite enrichment content. The technique of improving rare earth recovery rate and fluorite grade in tailings is capable of improving rare earth recovery rate and fluorite grade in tailings.

Description

technical field [0001] The invention relates to the field of metal beneficiation, in particular to a process for improving the recovery rate of rare earth and the grade of fluorite in tailings. Background technique [0002] Baiyun Obo Mine is rich in iron, rare earth, niobium and fluorite, etc. It is a rare mineral resource in the world. However, due to no breakthrough in ore dressing technology, only about 70% of iron and about 10% of rare earth are recycled in current production. The rest are all discharged into the tailings, and the amount of tailings stockpiled is very large, which not only wastes mineral resources, but also has an impact on the environment. [0003] "Baiyun Obo Mining and Metallurgy Technology" compiled by Baotou Steel in 1995 summarized the results of the dressing and smelting research of the paragenetic ore in the past few decades, especially the research results of the beneficiation process. The weak magnetic-strong magnetic —Flotation combined bene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03D1/001B03D101/02B03D101/04
Inventor 张永邬虎林马鹏起车丽萍马艳萍任俊环
Owner INNER MONGOLIA BAOTOU STEEL UNION
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