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Sorting pretreatment method for high-acid-consumption argillaceous sandstone type uranium ore

A technology for argillaceous sandstone and uranium ore, applied in the field of pretreatment of argillaceous sandstone-type uranium ore, which can solve the problems of large amount of sulfuric acid and oxidant, low uranium leaching rate, and high production cost

Active Publication Date: 2021-05-11
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] Aiming at the problems in the prior art that the argillaceous sandstone type uranium ore that is difficult to in-ground leaching is directly leached by acid method, the consumption of sulfuric acid and oxidant is large, the production cost is high, and the leaching rate of uranium is low when leaching by alkali method, the technical scheme of the present invention is based on Occurrence characteristics of uranium in argillaceous sandstone-type uranium ore. Before mineral leaching, use step-by-step flotation to separate and enrich independent uranium minerals with low carbonate content, which are easy to recover uranium by acid leaching, and then float Separation and separation of carbonate content is high, and it is easy to use alkaline leaching to recover the uranium concentrate in the adsorption state of uranium, thereby reducing the amount of ore treatment in subsequent hydrometallurgy, and overcoming the prior art argillaceous sandstone-type uranium ore that uses single acid leaching or alkali leaching Dip technical problems

Method used

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  • Sorting pretreatment method for high-acid-consumption argillaceous sandstone type uranium ore
  • Sorting pretreatment method for high-acid-consumption argillaceous sandstone type uranium ore
  • Sorting pretreatment method for high-acid-consumption argillaceous sandstone type uranium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An argillaceous sandstone-type uranium ore mainly includes plagioclase, argillaceous matter, microplagioclase, quartz, dolomite, calcite, gypsum, pitchblende, pyrite, goethite, limonite, carbonaceous matter , pyrite and other components. Uranium exists in two forms: independent minerals and adsorption states. Uranium minerals include pitchblende, uranite, and uranite. The output of most uranium minerals is closely related to pyrite, feldspar, quartz, and organic carbon. The uranium grade in the ore is 0.128%, and the carbon dioxide grade is 9.67%.

[0033] Four groups of drug system comparative tests were carried out, specifically:

[0034] (1) Grind the ore particle size to a fineness of -0.074mm, accounting for 60%, and adjust the pulp concentration to 15%.

[0035] Add the silicate mineral inhibitor sodium silicate No. 1 to No. 4 in the pulp to test dosages of 1000g / t, 800g / t, 800g / t, and 800g / t respectively, and stir for 15min at the rotor speed of the flotation m...

example 1

[0038] Example 1 test results are shown in Table 1.

[0039] Table 1 Example 1 test results

[0040]

[0041]

Embodiment 2

[0043] An argillaceous sandstone-type uranium ore mainly includes plagioclase, argillaceous matter, microplagioclase, quartz, dolomite, calcite, gypsum, pitchblende, pyrite, goethite, limonite, carbonaceous matter , pyrite and other components. Uranium exists in two forms: independent minerals and adsorption states. Uranium minerals include pitchblende, uranite, and uranite. The output of most uranium minerals is closely related to pyrite, feldspar, quartz, and organic carbon. The uranium grade in the ore is 0.128%, and the carbon dioxide grade is 9.67%.

[0044] (1) Grind the ore particle size to a fineness of -0.074mm, accounting for 65%, and adjust the pulp concentration to 20%.

[0045] (2) Add silicate mineral inhibitor water glass 600g / t to the pulp, and stir for 15min under the condition of flotation machine rotor speed 1500r / min, add carbonate mineral inhibitor sodium pyrophosphate 300g / t, and flotation machine Stir for 15 minutes under the condition of rotor speed 1...

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Abstract

The invention discloses a sorting pretreatment method for high-acid-consumption argillaceous sandstone type uranium ore. The method is characterized in that independent uranium ore of the argillaceous sandstone type uranium ore is floated out by inhibiting carbonate minerals, the content of the carbonate minerals in the floated uranium ore concentrate is low, uranium is easily leached and recycled by adopting an acid method subsequently, the acid consumption is low, and uranium ore with an absorption state is floated and recovered, uranium in the part of flotation uranium concentrate is easy to leach out, the content of carbonate minerals is high, an alkaline method is easy to leach and recover subsequently, and flotation tailings can be directly discarded. According to the method, the ores are subjected to flotation grouping according to the leaching characteristics of the ores and the occurrence characteristics of uranium, so that the reagent consumption of subsequent leaching can be effectively reduced, the leaching rate of uranium can be improved, flotation tailings can be discarded, and technical support is provided for economic development of uranium ore resources.

Description

technical field [0001] The invention relates to a pretreatment method for argillaceous sandstone-type uranium ore, in particular to a method for step-by-step flotation of argillaceous sandstone-type uranium ore to produce uranium concentrate with low carbonate content and easy acid leaching, and uranium concentrate with high carbonate content and easy acid leaching. The invention relates to a pretreatment method for uranium concentrate in adsorption state by alkali leaching, belonging to the technical field of uranium ore dressing. Background technique [0002] At present, among the proven sandstone uranium resources in northern my country, there are a large number of sandstone-type uranium deposits that are difficult to mine by in-situ leaching. Usually, these deposits have the characteristics of poor permeability, low confined water head, and depletion of groundwater. , Loose, bulky, swelling" and other soft rock characteristics, called argillaceous sandstone-type uranium d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D1/01B03D1/008C22B60/02C22B3/04B03D101/02B03D101/06B03D101/04B03D103/02
CPCB03D1/018B03D1/01B03D1/008C22B60/02C22B3/04B03D2201/02B03D2201/06B03D2201/04B03D2203/02Y02P10/20
Inventor 刘志超李春风李广强录德刘辉孟运生马嘉唐宝彬
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY