Beneficiation method for recovering uranium from rare earth ore

A beneficiation method and a technology for recovering uranium, which are applied in the field of uranium resource beneficiation, can solve the problems of low uranium content, difficult separation and enrichment of uranium, complex uranium occurrence state, etc., and achieve the effects of reducing radioactive hazards and high-efficiency enrichment.

Active Publication Date: 2021-09-03
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Aiming at the technical problems in the prior art that the uranium in rare earth ores is complex, the uranium content is low, and the separation and enrichment of uranium is difficult, the purpose of the present invention is to combine the characteristics of uranium-containing rare earth ores and the occurrence of uranium minerals Features, develop a method to achieve high-efficiency separation and enrichment of uranium minerals without changing the existing rare earth recovery process and without affecting the recovery rate of rare earths. This method can significantly reduce the content of uranium in rare earth concentrates and tailings , reduce radioactive hazards to the environment, and recover valuable uranium resources

Method used

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  • Beneficiation method for recovering uranium from rare earth ore
  • Beneficiation method for recovering uranium from rare earth ore
  • Beneficiation method for recovering uranium from rare earth ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A rare earth mine in northern my country mainly includes bastnaesite, xing'anite, brown yttrium niobium ore, pyrochlore, thorite, fractalite, magnetite, quartz, zircon, feldspar, chlorite, calcite, black Mica and other mineral composition, REO content 0.92%, U content 0.021%.

[0065] In this example, the flotation effects of uranium minerals added with uranium mineral activator lead nitrate and without uranium mineral activator were compared, and the test numbers were test A and test B respectively.

[0066] (1) The ores in test A and test B were crushed to -12mm respectively, and then the fine-grained ores below -0.5mm were separated with a sieve to obtain +0.5mm coarse-grained ore and -0.5mm fine-grained ore.

[0067] (2) Adjust the density of the dense medium suspension to 1.5kg / m 3 , the dense medium feed pressure is set to 110kPa, the ratio of the ore volume fed to the resuspension liquid volume is 1:5, and the +0.5mm coarse-grained grade of test A and test B are ...

Embodiment 2

[0082]A rare earth mine in northern my country mainly includes bastnaesite, xing'anite, brown yttrium niobium ore, pyrochlore, thorite, fractalite, magnetite, quartz, zircon, feldspar, chlorite, calcite, black Mica and other mineral composition, REO content 0.92%, U content 0.021%.

[0083] (1) Crush the ore to -10mm, and then use a sieve to separate the fine-grained ore below -1mm to obtain +1mm coarse-grained ore and -1mm fine-grained ore.

[0084] (2) Adjust the density of the dense medium suspension to 1.8kg / m 3 , the feeding pressure of the dense medium is set to 120kPa, the ratio of the solid volume of the ore fed to the volume of the resuspension liquid is 1:4.5, and the +1mm coarse-grained ore is separated by a dense medium cyclone to obtain a gravity concentration concentrate And re-election tailings I.

[0085] (3) Under the condition of magnetic field intensity 17000Oe, classify-1mm fine-grained ore with strong magnetic separator, obtain magnetic separation concent...

Embodiment 3

[0098] A rare earth mine in northern my country mainly includes bastnaesite, xing'anite, brown yttrium niobium ore, pyrochlore, thorite, fractalite, magnetite, quartz, zircon, feldspar, chlorite, calcite, black Mica and other mineral composition, REO content 0.92%, U content 0.021%.

[0099] In this example, the flotation effects of uranium minerals added with trialkyl oxyphosphorus as an auxiliary collector for uranium minerals and those without auxiliary collectors for uranium minerals were compared, and the test numbers were test A and test B respectively.

[0100] (1) The ores in test A and test B were crushed to -10mm respectively, and then the fine-grained ores below -1mm were separated with a sieve to obtain +1mm coarse-grained ore and -1mm fine-grained ore.

[0101] (2) Adjust the density of the dense medium suspension to 2.0kg / m 3 , the dense medium feed pressure is set to 140kPa, the ratio of the volume of the ore fed to the volume of the resuspension is 1:4, and the...

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Abstract

The invention discloses a beneficiation method for recovering uranium from rare earth ore. The beneficiation method comprises the steps that uranium-containing rare earth ore is finely crushed and then classified, and coarse-fraction ore and fine-fraction ore are pre-enriched through a dense medium cyclone and a high-intensity magnetic separator correspondingly; after the mixed rough concentrate is reground, rare earth minerals are firstly subjected to flotation, uranium minerals are then subjected to flotation, and after flotation uranium concentrate is reground, the uranium grade is further improved through weak magnetic iron removal; and after scavenging tailings in the flotation process are reground, uranium ore is further separated and enriched through reselection, the uranium concentrate subjected to reselection is subjected to strong magnetic separation, the uranium grade is improved, the yield of the finally obtained uranium concentrate is 5.50%, the uranium grade is 0.27%, and the recovery rate is 71.44%. According to the beneficiation method for recovering the uranium from rare earth ore, precious uranium resources can be efficiently recovered while rare earth ore recovery is not affected, and the radioactive hazard to the environment is reduced.

Description

technical field [0001] The invention relates to a beneficiation method for rare earth ore containing uranium, in particular to a beneficiation method for simultaneously recovering rare earth and uranium ore from rare earth ore, and belongs to the technical field of beneficiation of uranium ore resources. Background technique [0002] A certain amount of uranium is often associated with rare earth mines in northern my country, but the uranium grade is generally relatively low, between 0.01% and 0.05%. At present, rare earth mine production enterprises generally do not recycle this part of uranium resources, and some uranium-containing minerals enter the rare earth concentrate. , a part of it enters the tailings, and almost all of them are not recovered separately, which is not conducive to environmental protection and wastes precious strategic uranium resources. Uranium in rare earth ores is mainly dispersed in zircon, pyrochlore, pyrochlore, thorite and other minerals in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 刘志超李广李春风马嘉强录德刘会武苏学斌阙为民刘忠臣唐宝彬向秋林
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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