Uranium ore dump leaching-agitation leaching combined hydrometallurgical method

A stirring leaching and uranium ore technology, which is applied in the field of uranium ore leaching technology, can solve the problems of poor permeability of ore piles, low leaching rate, and long leaching cycle, etc., and achieve the effects of less equipment investment, low production cost, and reduced adverse effects

Inactive Publication Date: 2018-03-16
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to propose a new uranium ore heap leaching-stirring leaching combined hydrometallurgy process, which solves the problem of poor heap permeability, long leaching cycle, and leaching prob...

Method used

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specific Embodiment

[0048] Specific examples are as follows: Granite-type uranium ore containing diabase in a uranium mining and metallurgy enterprise, with an average uranium grade of 0.15%, is primary crushed and secondary crushed by a two-stage jaw crusher, finely crushed by a pair of roller crushers, and screened by a linear vibrating screen. The "three sections and one closed circuit" process consists of crushing to -6mm, and water is added for primary crushing and screening. The sieve on the vibrating screen returns to fine crushing, and the undersieve is separated into -6mm~+0.15mm coarse-grained ore (coarse sand) and -0.15mm-grained mud ore (overflow) by the high weir spiral classifier. Coarse-grained ore (about 0.14% uranium grade) goes to the stockyard to build a 3.5m-high ore heap, and sprays and leaches with sulfuric acid as the leaching agent. After leaching for 100 days, the leaching slag grade is 0.012% to 0.014%, and the uranium leaching rate exceeds 90%. %, the acid consumption i...

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Abstract

The invention belongs to the technical field of a uranium ore leaching process in uranium hydrometallurgy and particularly relates to a uranium ore dump leaching-agitation leaching combined hydrometallurgical method. The uranium ore dump leaching-agitation leaching combined hydrometallurgical method comprises the following steps that (1) uranium ore dump leaching dumped ores are broken through theprocess of three stages with a single closed circuit; (2) through wet-type screening and grading, fine silt with the size fraction being smaller than 0.15 mm in screen underflow of the broken uraniumore dump leaching dumped ores in the step (1) is separated; (3) thin ore pulp in the step (2) enters a thickener to be concentrated; (4) the thickener underflow ore pulp in the step (3) enters an agitation leaching system to be leached, and the leached ore pulp is obtained; and (5) the leached ore pulp which is obtained in the step (4) is filtered and washed. According to the technical scheme, the grade of separated muddy ore uranium is higher than the average grade of the ores, the higher leaching rate can be obtained through agitation leaching, thus the leaching concept of 'low-dump and high-smelting' is achieved, and the ore treating technology tends to be more reasonable accordingly.

Description

technical field [0001] The invention belongs to the technical field of uranium ore leaching technology in uranium hydrometallurgy, and in particular relates to a uranium ore heap leaching-stirring leaching combined hydrometallurgy method. Background technique [0002] The basic hydrometallurgical process of extracting and producing uranium concentrate products from uranium ore, that is, yellow cake, is: after the ore is crushed or ground, it is leached with leaching agent sulfuric acid or carbonate, and the leaching solution is obtained after solid-liquid separation, and ion exchange with resin Or the solvent extraction process recovers uranium from the leaching solution to obtain a high-concentration uranium leaching solution or stripping solution, and at the same time separates it from most impurity ions. Sodium hydroxide or ammonia water is added to the eluting qualified solution or stripping solution to precipitate uranium diuranate concentrate, and the yellow cake produ...

Claims

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Application Information

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IPC IPC(8): C22B60/02C22B3/08
CPCC22B60/0234C22B3/08
Inventor 钟平汝曾毅君李铁球
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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