A comprehensive recovery method for uranium-containing low-grade polymetallic ore

A polymetallic ore recovery method technology, which is applied in the comprehensive recovery of green and efficient beneficiation of uranium-containing low-grade polymetallic ores, and in the field of comprehensive recovery of uranium-containing low-grade polymetallic ores. Problems such as selection of equipment and pipelines can be achieved to improve the recovery rate of gravity separation, reduce the amount of sulfuric acid, and reduce the content of carbonate

Active Publication Date: 2022-05-17
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The ore of this deposit has the characteristics of complex composition, many types of useful minerals, and radioactivity. According to previous research results, it can be seen that although some progress has been made in the comprehensive recovery of uranium polymetallic ore dressing, there are still a series of problems: The ore is easy to muddy during the grinding process, which affects the recovery rate of useful minerals; the beta stone in the fine mud cannot be recovered; the radioactivity of the lead concentrate and iron concentrate in the mineral processing products exceeds the standard and cannot be sold directly; the uranium and niobium in the beta stone concentrate The grade enrichment ratio is not high, the follow-up smelting ore processing volume is large, and the production cost is high.
Chinese patent (CN109482336B) discloses a new process for re-separation and recovery of low-grade niobium-titanium-uranium ore, but this invention only pre-enriches useful minerals through re-election, and the grade of useful minerals is low without further separation.
Chinese patent (CN106925433B) discloses a polymetallic ore beneficiation process containing niobium-titanium-uranium ore. This process does not adopt the method of segmental crushing and segmental separation during re-election, and the re-election cost is high and the recovery rate of useful elements is low. , and fine-grained tailings did not use the flotation method to recover uranium, resulting in a low recovery rate of uranium. When recovering uranium, a single flotation method is used, which consumes a lot of flotation reagents and has a great impact on the environment.
Chinese patent (CN108787159B) discloses a comprehensive recovery and beneficiation method of low-grade uranium-containing polymetallic ore. This method is difficult to recover the uranium muddyed in the grinding process during re-election, and does not consider radioactive removal when recovering associated valuable metals , the radioactivity of beneficiation products does not meet the relevant standards, only flotation is used to recover minerals, and the pH of the pulp needs to be adjusted to be acidic, so not only the amount of flotation chemicals is large, but also the flotation equipment and pipelines will be corroded

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  • A comprehensive recovery method for uranium-containing low-grade polymetallic ore
  • A comprehensive recovery method for uranium-containing low-grade polymetallic ore
  • A comprehensive recovery method for uranium-containing low-grade polymetallic ore

Examples

Experimental program
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Effect test

Embodiment 1

[0072] A low-grade polymetallic uranium mine in Shaanxi is mainly composed of barite, calcite, feldspar, quartz, pyrite, galena, titanite, hornblende, biotite, epidote, garnet, magnetite , zircon, apatite, pitchblende, beta stone and other minerals, the main useful minerals are beta stone, galena, magnetite, etc., the grade of uranium is 0.016%, the grade of niobium is 0.017%, and the grade of lead is 0.54% %, iron grade is 4.04%.

[0073] (1) Firstly, the ore is finely crushed to -5mm, and the spiral chute is used for separation to obtain the spiral chute gravity separation coarse concentrate and gravity separation tailings 1.

[0074] (2) Grind the spiral chute re-selected coarse concentrate obtained in (1) to a fineness of less than 0.6mm, and divide the ore after grinding into five particle grades, which are -0.6~+0.4mm, -0.4~+ 0.2mm, -0.2~+0.074mm, -0.074~+0.043mm, -0.043mm. The first four particle fractions are re-selected with a shaking table, and the four gravity-sel...

Embodiment 2

[0086] A low-grade polymetallic uranium mine in Shaanxi is mainly composed of barite, calcite, feldspar, quartz, pyrite, galena, titanite, hornblende, biotite, epidote, garnet, magnetite , zircon, apatite, pitchblende, beta stone and other minerals, the main useful minerals are beta stone, galena, magnetite, etc., the grade of uranium is 0.016%, the grade of niobium is 0.017%, and the grade of lead is 0.54% %, iron grade is 4.04%.

[0087] (1) Firstly, the ore is finely crushed to -3.5mm, and the spiral chute is used for separation to obtain the spiral chute gravity separation coarse concentrate and gravity separation tailings 1.

[0088] (2) Grind the spiral chute re-selection coarse concentrate obtained in (1) to a fineness of less than 0.4mm, and divide the ore after grinding into four grades, which are -0.4~+0.2mm, -0.2~+ 0.074mm, -0.074~+0.043mm, -0.043mm. The first three particle fractions are re-selected with a shaking table, and the obtained three gravity-selected co...

Embodiment 3

[0101] A low-grade polymetallic uranium mine in Shaanxi is mainly composed of barite, calcite, feldspar, quartz, pyrite, galena, titanite, hornblende, biotite, epidote, garnet, magnetite , zircon, apatite, pitchblende, beta stone and other minerals, the main useful minerals are beta stone, galena, magnetite, etc., the grade of uranium is 0.016%, the grade of niobium is 0.017%, and the grade of lead is 0.54% %, iron grade is 4.04%.

[0102] (1) Firstly, the ore is finely crushed to -3mm, and the spiral chute is used for sorting, and the spiral chute gravity separation coarse concentrate and gravity separation tailings 1 are obtained.

[0103] (2) Grind the spiral chute re-election coarse concentrate obtained in (1) until the fineness is less than 0.3mm, and divide the ore after grinding into three particle grades, which are -0.3~+0.15mm, -0.15~+ 0.074mm, -0.074~+0.043mm, -0.043mm. The first two particle fractions are re-selected with a shaking table, and the obtained two grav...

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Abstract

The invention discloses a method for comprehensive recovery of uranium-containing low-grade polymetallic ore. The method is to finely crush the uranium low-grade polymetallic ore and then use a spiral chute to pre-throw the tailings, and then regrind the concentrate in the spiral chute and then classify and shake it. Bed re-election, and the tabekite lost in the small particle size during re-election is directly recovered by flotation, and the shaker gravity-selected concentrate can obtain radioactively qualified lead concentrate and Iron ore concentrates are finally enriched by a combination of magnetic separation and flotation. This method can realize the comprehensive recovery of various low-grade useful minerals in low-grade uranium polymetallic ores. It can not only reduce the amount of flotation reagents, Moreover, the grade of uranium and niobium in the tabelite concentrate is greatly improved, and the technological process has the advantages of environmental friendliness, high resource recovery rate, and low production cost.

Description

technical field [0001] The invention relates to a method for comprehensive recovery of low-grade polymetallic ore containing uranium, in particular to a method for comprehensive recovery of green and high-efficiency mineral processing of low-grade polymetallic ore containing uranium, and belongs to the technical field of mineral processing. Background technique [0002] A low-grade polymetallic uranium deposit in Shaanxi has huge uranium resources, reaching the standard of large-scale uranium deposits, but the uranium grade is only 0.016%. Nb 2 o 5 The amount of resources is 38,000 tons, and the grade is 0.021%. The amount of lead resources is 889,000 tons, with a grade of 0.49%. The polymetallic deposit has huge reserves, but the grades of useful components are lower than the cut-off grade, and direct hydrometallurgy has no economic benefits. Only by obtaining economically utilizable high-grade concentrate products through ore dressing pretreatment, and recovering assoc...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B03B9/00
CPCB03B9/00Y02W30/52
Inventor刘志超李广李春风强录德贾秀敏马嘉唐宝彬
OwnerBEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY