Beneficiation method for comprehensively recycling strontium mineral from rare earth tailings

A mineral processing method and tailings technology, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of large land occupation, environmental and safety hazards, waste of resources, etc., and achieve the effect of reducing the amount of tailings produced

Active Publication Date: 2019-05-28
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

[0005] On the other hand, a large amount of strontium ore and other resources associated with rare earth tailings have not been comprehensively recovered, which not only wastes precious resources, but also occupies a large amount of land for tailings disposal, and there are certain environmental and safety hazards

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  • Beneficiation method for comprehensively recycling strontium mineral from rare earth tailings

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Embodiment 1

[0034] A mineral processing method for comprehensively recovering strontium minerals from rare earth tailings, the steps are as follows:

[0035] 1) Take the rare earth beneficiation tailings, add water and adjust the slurry until the ore accounts for 25% of the mass percentage of the slurry. The test results show that the raw ore mainly contains SrO16.18wt%, Fe 2 o 3 3.17wt%, REO 0.85wt%, K 2 O 4.18wt%, Na 2 O 1.40wt%, Al 2 o 3 9.90wt%, SiO 2 28.32wt%, CaF 2 15.16wt%, BaO 1.25%, etc.

[0036]2) carry out two-stage gravity separation to the ore pulp of step 1), obtain gravity separation concentrate and gravity separation tailings;

[0037] 3) carry out strong magnetic separation operation to the gravity separation concentrate obtained in step 2), the magnetic separation intensity is 1.0 Tesla, obtain magnetic minerals (tailings I) and non-magnetic minerals, and the non-magnetic minerals are celestite concentrates;

[0038] 4) Add 5% by mass sodium silicate solution, 1...

Embodiment 2

[0045] A mineral processing method for comprehensively recovering strontium minerals from rare earth tailings, the steps are as follows:

[0046] 1) Take the rare earth beneficiation tailings, add water and adjust the slurry until the ore accounts for 30% of the mass percentage of the slurry. The test results show that the ore mainly contains SrO 18.50wt%, Fe 2 o 3 4.86wt%, REO 0.80wt%, K 2 O 4.20wt%, Na 2 O 1.51wt%, Al 2 o 3 9.72wt%, SiO 2 31.05wt%, CaF 2 12.28wt%, BaO 1.76%, etc.

[0047] 2) carry out two-stage gravity separation to the ore pulp of step 1), obtain gravity separation concentrate and gravity separation tailings;

[0048] 3) Carry out strong magnetic separation operation to the gravity separation concentrate obtained in step 2), the magnetic separation intensity is 1.5 tesla, obtain magnetic mineral (tailings I) and nonmagnetic mineral, nonmagnetic mineral is lapis lazuli concentrate;

[0049] 4) Add 7.5% by mass of sodium silicate solution to the grav...

Embodiment 3

[0056] A mineral processing method for comprehensively recovering strontium minerals from rare earth tailings, the steps are as follows:

[0057] 1) Take the rare earth beneficiation tailings, add water and adjust the slurry until the ore accounts for 30% of the mass percentage of the slurry. The test results show that the raw ore mainly contains 20.15wt% SrO, Fe 2 o 3 4.06wt%, REO 0.75wt%, K 2 O 3.58wt%, Na 2 O 1.03wt%, Al 2 o 3 8.13wt%, SiO 2 31.52wt%, CaF 2 11.16wt%, BaO 1.75%, etc.

[0058] 2) carry out two-stage gravity separation to the ore pulp of step 1), obtain gravity separation concentrate and gravity separation tailings;

[0059] 3) Carry out strong magnetic separation operation to the gravity separation concentrate obtained in step 2), the magnetic separation intensity is 1.2 tesla, obtain magnetic minerals (tailings I) and nonmagnetic minerals, and the nonmagnetic minerals are celestite concentrates;

[0060] 4) To the gravity separation tailings describ...

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Abstract

The invention discloses a beneficiation method for comprehensively recycling a strontium mineral from rare earth tailings and relates to a beneficiation method for the rare earth tailings containing celestite and strontianite. The beneficiation method comprises the following steps that (1) heavy minerals in the rare earth tailings are screened out through gravity concentration, so that gravity concentrate is obtained; (2) rare earth, iron and other magnetic minerals in the gravity concentrate in the step (1) are attracted out through strong magnetic separation, so that celestite concentrate isobtained; (3) the strontianite mineral in the gravity tailings in the step (1) is floated out through flotation, so that strontianite concentrate is obtained. The beneficiation method for comprehensively recycling the strontium mineral from the rare earth tailings has the beneficial effects of remarkably recycling the strontium mineral from the rare earth beneficiation tailings, improving the comprehensive utilization value of resources and greatly lowering the discharge amount of tailings.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of beneficiation tailings, in particular to a beneficiation method for comprehensively recovering celestite, strontite and other strontium-containing minerals from rare earth tailings. Background technique [0002] In addition to rare earth minerals, rare earth ores are accompanied by a large amount of useful minerals such as strontium ore. The recycling of associated minerals can not only create huge economic benefits for enterprises, but also effectively reduce tailings emissions and improve the comprehensive utilization of resources. The sustainable development of the environment and resources is of great significance. [0003] Strontium ore is the main raw material for producing various strontium compounds and metal strontium. There are more than 10 kinds of strontium minerals known in nature. The main minerals used to extract strontium in industry are celestite and strontite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00B03D1/018B03D1/012B03D101/00B03D101/02
Inventor 曾小波熊文良杨耀辉严伟平
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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