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A method for enriching uranium in brine

A technology of brine and elements, applied in the field of trace element extraction, can solve the problems of shortening time and difficulty in enriching trace elements, and achieve the effects of shortening time, reducing mother liquor entrainment loss, and simple process flow

Active Publication Date: 2018-10-02
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the defects of the prior art, provide a new uranium element enrichment method, solve the problem that trace elements are difficult to enrich in the existing salt lake old brine, and use the multi-stage salt field multi-stage separation method to make the uranium element enrichment The efficiency is increased to ≥60.0%, which reduces the cost and shortens the time, so that the salt lake resources can be used rationally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for enriching uranium in brine, comprising the following steps:

[0026] (1) Take Qinghai Gasikule Lake type salt lake brine and place it in an evaporation pond as a raw material;

[0027] (2) Take 10kg of brine and place it in a climate simulation room, which can simulate the temperature from winter to summer in Yantian;

[0028] The composition of brine is referred to as K + , Mg 2+ 、Na + , Cl - , SO4 2- The main solution, the trace element is Li + and U-based. where K + The mass content is 0.10%, Mg 2+ The mass content is 9.0%, Na + The mass content is 0.1%, Cl - The mass content is 22.0%, SO4 2- The mass content is 3.20%, Li + The mass content is 0.10%, and the U content is 0.50mg / L;

[0029] (3) Put 10kg of brine taken in the previous step into the evaporation tank and place it in a climate simulation room with a temperature of about -15°C. Observe the temperature of the brine regularly. After the temperature of the brine drops to nearly -15°C...

Embodiment 2

[0041] A method for enriching uranium in brine, comprising the following steps:

[0042] (1) Take Qinghai Gasikule Lake type salt lake brine and place it in an evaporation pond as a raw material;

[0043] (2) Take 10kg of brine and place it in a climate simulation room, which can simulate the temperature from winter to summer in Yantian;

[0044] The composition of brine in the described (2) refers to K + , Mg 2+ 、Na + , Cl - , SO 4 2- The main solution, the trace element is Li + and U-based, where K + The mass content is 0.25%, Mg 2+ The mass content is 7.5%, Na + The mass content is 0.18%, Cl - The mass content is 23.0%, SO 4 2- The mass content is 2.50%, Li + The mass content is 0.05%, and the U content is 0.60mg / L;

[0045] (3) Put a certain amount of old brine into the evaporation tank and place it in a climate simulation room with a temperature of about -15°C, observe the brine temperature regularly, and wait for the temperature of the brine to drop to near...

Embodiment 3

[0057] A method for naturally enriching trace elements in old brine, comprising the following steps:

[0058] (1) Take Qinghai Gasikule Lake type salt lake brine and place it in an evaporation pond as a raw material;

[0059] (2) Take 10kg of brine and place it in a climate simulation room, which can simulate the temperature from winter to summer in Yantian;

[0060] The composition of brine is referred to as K + , Mg 2+ 、Na + , Cl - , SO4 2- The main solution, the trace element is Li + and U-based, where K + The mass content is 0.19%, Mg 2+ The mass content is 8.14%, Na + The mass content is 0.14%, Cl - The mass content is 22.5%, SO4 2- The mass content is 3.00%, Li + The mass content is 0.08%, and the U content is 0.55mg / L;

[0061] (3) Put a certain amount of old brine into the evaporation tank and place it in a climate simulation room with a temperature of about -15°C, observe the brine temperature regularly, and wait for the temperature of the brine to drop to...

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Abstract

The invention relates to the technical field of microelement extraction and particularly discloses a method for uranium element enrichment in bittern. The method comprises the following steps: S1, alternatively carrying out low-temperature separation out and high-temperature evaporation on bittern to obtain treated old bittern; S2, carrying out multistage solid-liquid separation treatment on the old bittern under normal temperature, wherein mass ratio of content of uranium element in the liquid phase obtained from the back-stage solid-liquid separation to content of element in the liquid phase obtained from the front-stage solid-liquid separation is 1.7:1 to 1.8 :1; and S3, concentrating to obtain uranium element. With adoption of the method, the problem that microelements in old bittern of the existing salt lake is difficult for enrichment is solved, and the yield of uranium element is increased to equal to or greater than 60.0% by directly utilizing natural energy and through a multistage separation method of a multistage salt pan, so that the cost is reduced, the time is shortened, and the salt lake resource is reasonably utilized.

Description

technical field [0001] The invention relates to the technical field of trace element extraction, in particular to a method for enriching uranium in brine. Background technique [0002] Uranium is a national strategic resource and the main raw material for producing nuclear energy in my country. The brine of Gasikule Salt Lake in Qinghai is rich in uranium element, which is one of the main uranium resources in my country. With the increasing shortage of energy raw materials in the world, like lithium resources, uranium resources, as one of the main alternative energy sources, will surely become the object of competition in the world, and the development of uranium resources in salt lakes has become inevitable. However, in the existing Yantian process, during the solid-liquid separation process, the mother liquid in the solid phase entrains and loses a large amount of resources, resulting in a low yield of trace elements, and the entire process takes a long time and costs hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B60/02C22B7/00
CPCC22B7/006C22B60/0252Y02P10/20
Inventor 张志宏马艳芳王婧王健康张永明赵冬梅付振海董生发
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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