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Beneficiation comprehensive recovery method for low-grade iron-containing uranium ore

A recovery method and uranium ore technology, applied in the field of uranium ore beneficiation, can solve the problems of poor economic benefit and high production cost, and achieve the effect of reducing iron grade, improving grade and reducing production cost

Active Publication Date: 2021-09-03
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the low-grade iron-containing uranium ore in the prior art, due to the low uranium grade, the economic benefits are poor, the iron enters the solution during the leaching process, affects the separation and extraction of uranium, needs to remove iron, and has high production costs. The purpose of the present invention The purpose is to provide a comprehensive recovery method of low-grade iron-containing uranium ore. This method combines gravity separation, magnetic separation and flotation, not only can obtain radioactive and qualified iron concentrates, and realize comprehensive recovery of magnetite , improve the economic benefits of ore deposits, and can increase the grade of uranium in the ore, reduce the amount of subsequent hydrometallurgy ore processing, and achieve the purpose of reducing production costs

Method used

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  • Beneficiation comprehensive recovery method for low-grade iron-containing uranium ore
  • Beneficiation comprehensive recovery method for low-grade iron-containing uranium ore
  • Beneficiation comprehensive recovery method for low-grade iron-containing uranium ore

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The main uranium mineral in a certain iron-bearing uranium ore is crystalline uranium ore, followed by pitchblende. The uranium grade in the ore is low, with a uranium grade of 0.035%. The iron-bearing minerals include magnetite, hematite, and pyrite. More than 95% is magnetite, the iron grade is 6.83%, and the gangue minerals are mainly serpentine, feldspar, quartz, biotite, muscovite, fluorite, calcite, zircon, monazite, chlorite, etc.

[0033] (1) The ore is crushed to -5mm with a high-pressure roller mill. After the ore is crushed, the ore fineness is ground to -3mm with a ball mill, and the tailings are pre-thrown with a spiral chute to obtain a spiral chute concentrate and a spiral chute tailings.

[0034] (2) The spiral chute concentrate obtained in step (1) is ground with a ball mill, and the fineness is ground to -0.6mm, and the sieve with a sieve size of 0.074mm is divided into two parts of +0.074mm and -0.074mm, respectively. Sorting by shaking table to obtai...

Embodiment 2

[0046] The main uranium mineral in a certain iron-bearing uranium ore is crystalline uranium ore, followed by pitchblende. The uranium grade in the ore is low, with a uranium grade of 0.035%. The iron-bearing minerals include magnetite, hematite, and pyrite. More than 95% is magnetite, the iron grade is 6.83%, and the gangue minerals are mainly serpentine, feldspar, quartz, biotite, muscovite, fluorite, calcite, zircon, monazite, chlorite, etc.

[0047] In this example, the effect of flotation deuranization on the radioactivity of iron ore concentrates is compared. The process of test A has flotation deuranization, and the process of test B has no process of flotation deuranization.

[0048] (1) Test A and Test B ores are crushed to -4mm by high-pressure roller mill respectively. After the ore is crushed, the ore fineness is ground to -2mm by ball mill, and tailings are pre-thrown by spiral chute to obtain spiral chute concentrate and spiral chute. Chute tailings.

[0049] (2...

Embodiment 3

[0063] The main uranium mineral in a certain iron-bearing uranium ore is crystalline uranium ore, followed by pitchblende. The uranium grade in the ore is low, with a uranium grade of 0.035%. The iron-bearing minerals include magnetite, hematite, and pyrite. More than 95% is magnetite, the iron grade is 6.83%, and the gangue minerals are mainly serpentine, feldspar, quartz, biotite, muscovite, fluorite, calcite, zircon, monazite, chlorite, etc.

[0064] This example compares the flotation effects of uranium under the condition of adding different dosages of uranium mineral activator lead nitrate, which are numbered test A, test B, test C and test D respectively.

[0065] (1) Test A, Test B, Test C, and Test D four groups of ores were respectively crushed to -3mm by high-pressure roller mill. Tails, get spiral chute concentrate and spiral chute tailings.

[0066] (2) Grind the spiral chute concentrates obtained in Test A, Test B, Test C, and Test D steps (1) with a ball mill, ...

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Abstract

The invention discloses a beneficiation comprehensive recovery method for low-grade iron-containing uranium ore. The beneficiation comprehensive recovery method comprises the steps that uranium ore and magnetite are enriched in advance through gravity separation of the low-grade iron-containing uranium ore, then a magnetite is separated from gravity separation concentrate through low-intensity magnetic separation, the uranium ore is removed from magnetic separation rough concentrate through flotation and multiple times of low-intensity magnetic concentration, the quality of the iron ore concentrate is improved, the radioactivity is removed, the iron grade in the finally obtained iron ore concentrate is 67.12%, the iron recovery rate is 91.59%, and the radioactivity reaches the national standard; and the uranium grade in the obtained uranium concentrate is 0.261%, the uranium recovery rate is 84.41%, the iron grade is only 1.56%, the uranium grade in the uranium concentrate is improved, and the iron grade in the uranium concentrate is reduced. According to the beneficiation comprehensive recovery method for the low-grade iron-containing uranium ore, comprehensive recovery of the low-grade iron-containing uranium ore is really realized.

Description

technical field [0001] The invention relates to a mineral processing method of low-grade uranium ore, in particular to a comprehensive recovery method of low-grade iron-containing uranium ore, belonging to the technical field of uranium mineral processing. Background technique [0002] According to preliminary statistics, among the uranium resources discovered in my country, about 39% of the uranium ore is associated with other valuable elements, and the elements that can be comprehensively utilized include vanadium, copper, lead, zinc, molybdenum, rhenium, niobium, zirconium, gold , iron, rare earth, etc. After decades of development, my country's single uranium metal type, simple ore properties, high uranium content, and economically exploitable resources have become less and less, and a large number of low-grade uranium ores with associated polymetallic metals have gradually become the main body of development and utilization. For low-grade polymetallic uranium deposits, ...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 刘志超李广李春风
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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