Method for extracting uranium from acidic, high-specific-gravity or low-concentration uranium ore extraction solution

A low-concentration, raw solution extraction technology, applied in the field of uranium extraction, can solve the problems of difficult concentration of uranium solution, achieve the effect of improving product quality, accelerating the leaching process, and improving physical properties

Inactive Publication Date: 2014-06-11
CNNC NORTHERN URANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for extracting uranium from acidic, high specific gravity or low concentration uranium ore extraction stock solution to improve production capacity and reduce cost for the problem of difficult enrichment of acidic, high specific gravity or low concentration uranium solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In a 250mL separatory funnel, the first-stage transition, fourth-stage countercurrent extraction, first-stage washing, and first-stage back-extraction tests were carried out.

[0018] A method for extracting uranium from acidic, high specific gravity or low concentration uranium solution according to the present invention comprises the following steps in sequence:

[0019] Step 1: Obtaining the extraction stock solution: pile up powder ore with a particle size of less than 8mm, connect multiple piles in series with pipelines, and use concentrated H 2 SO 4 Spraying starts from the first pile, collects the leachate obtained from the bottom of the first pile, and then sprays the top of the next pile with the leachate, and proceeds sequentially, so that the pH value of the leachate of each pile is 0.8-1.5, and collects the leachate obtained from the bottom of the last pile as the original solution, and leaching The cycle is 120 days, and the mass concentration of each elem...

Embodiment 2

[0027] In a 250 mL separatory funnel, the experiments of 1-stage transformation, 5-stage countercurrent extraction, 1-stage washing, and 1-stage back extraction were carried out.

[0028] A method for extracting uranium from acidic, high specific gravity or low concentration uranium solution according to the present invention comprises the following steps in sequence:

[0029] Step 1: Obtaining the extraction stock solution: pile up powder ore with a particle size of less than 8mm, connect multiple piles in series with pipelines, and use concentrated H 2 SO 4 Start spraying from the first pile, collect the leachate obtained from the bottom of the first pile, and continue spraying as the spray agent for the next pile, and proceed in sequence, so that the pH value of the leachate in each pile is 0.8-1.5, and collect the leachate obtained from the bottom of the last pile as the extraction agent. Stock solution, the leaching period is 120 days, and the composition of the obtained...

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Abstract

The invention relates to hydrometallurgical extraction technology of uranium and aims at providing a method for extracting uranium from acidic, high-specific-gravity or low-concentration uranium ore extraction solution, to overcome the difficult concentration problem of an acidic, high-specific-gravity or low-concentration uranium solution, so as to improve the yield and reduce the cost. According to the method provided by the invention, tri-fatty amine is used as an extractant to extract an acidic, high-specific-gravity or low-concentration complicated uranium solution, polyhydric alcohol is used as an additive to perfect the physical properties of the extractant, and the effect of extracting uranium from the acidic, high-specific-gravity or low-concentration uranium ore extraction solution is good.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy extraction of uranium, in particular to a method for extracting uranium from acidic, high specific gravity or low concentration solutions. Background technique [0002] With the development of nuclear energy in my country, the demand for natural uranium is increasing. Due to the decline in the grade of uranium ore, more low-grade, multi-component refractory ores need to be re-mined and processed, resulting in a generally low concentration of uranium in the uranium ore extraction solution and increasingly complex components. In addition to containing conventional SO 4 2- , iron, phosphorus, aluminum, manganese, vanadium, calcium, magnesium, silicon, molybdenum and other impurities, but also contains a certain amount of humic acid, organic matter, heavy metal oxides, etc. Among them, acidity, high specific gravity or low concentration are the main characteristics of this kind of uranium o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/28C22B60/02
Inventor 廖德攀孔凡峰王辉解洪亮周云云李世俊孙希龙刘扬李闪
Owner CNNC NORTHERN URANIUM IND CO LTD
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