Method for recycling uranium from acidic waste water containing ammonium nitrate and uranium

A recovery method and ammonium nitrate technology are applied in the field of uranium-containing wastewater treatment and can solve problems such as inability to meet demand

Active Publication Date: 2017-05-10
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The uranium purification and conversion production line using U3O8 as raw material is a relatively mature process. When the raw material is replaced with ADU as the raw material for uranium purification and conversion production, it is bound to produce acidic uranium-containing and ammonium nitrate-containing wastewater, which is processed by the existing extraction method. Dealing with unsatisfactory needs

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  • Method for recycling uranium from acidic waste water containing ammonium nitrate and uranium

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Embodiment 1

[0034] Such as figure 1 Described, a kind of method for recovering uranium in acidic ammonium nitrate-containing uranium-containing wastewater of the present invention, it comprises the steps:

[0035] (1) The acidic ammonium nitrate-containing uranium-containing wastewater from uranium purification and conversion is mixed with sodium hydroxide solution to form an extraction stock solution with an acidity of 0.5mol / L;

[0036] The components of the acidic ammonium nitrate-containing uranium-containing wastewater include: [U]=4g / L, [HNO 3 ]=3mol / L, [NH 4 NO 3 ]=500g / L;

[0037] The mass percentage of described sodium hydroxide solution is 40%;

[0038] (2) extract the stock solution of step (1) gained and the TBP-hydrogenated kerosene extractant (30% tributyl phosphate+70% hydrogenated kerosene) of 30% by volume percentage to extract; Phase flow ratio 1:4;

[0039] (3) After the extraction, the loaded organic phase can be sent to the uranium purification conversion extrac...

Embodiment 2

[0041] Such as figure 1 Shown, the recovery method of uranium in a kind of acidic ammonium nitrate-containing uranium-containing wastewater of the present invention, it comprises the steps:

[0042] (1) The acidic ammonium nitrate-containing uranium-containing wastewater from uranium purification and conversion is pumped to the waste liquid storage tank for temporary storage;

[0043] The components of the acidic ammonium nitrate-containing uranium-containing wastewater include: [U]=4g / L, [HNO 3 ]=3mol / L, [NH 4 NO 3 ]=500g / L;

[0044] (2) When the wastewater described in step (1) is treated, it is pumped into the seasoning tank;

[0045] (3) use solid sodium hydroxide and deionized water preparation mass percent in the alkali preparation tank to be 40% sodium hydroxide solution, this sodium hydroxide solution is also pumped in the seasoning tank, and step (2) described The waste water is prepared into an extraction stock solution with an acidity of 0.5mol / L;

[0046] (4)...

Embodiment 3

[0052] Such as figure 1 Described, a kind of method for recovering uranium in acidic ammonium nitrate-containing uranium-containing wastewater of the present invention, it comprises the steps:

[0053] (1) The acidic ammonium nitrate-containing uranium-containing wastewater from uranium purification and conversion is mixed with sodium hydroxide solution to form an extraction stock solution with an acidity of 0.5mol / L;

[0054] The components of the acidic ammonium nitrate-containing uranium-containing wastewater include: [U]=0.2g / L, [HNO 3 ]=0.5mol / L, [NH 4 NO 3 ]=100g / L;

[0055] The mass percentage of described sodium hydroxide solution is 30%;

[0056] (2) extracting the stock solution obtained in step (1) with a TBP-hydrogenated kerosene extractant with a volume percentage of 20%; the two-phase flow ratio of the extractant and the stock solution is 1:3;

[0057] (3) After the extraction, the loaded organic phase can be sent to the uranium purification conversion extra...

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Abstract

The invention provides a method for recycling uranium from acidic waste water containing ammonium nitrate and the uranium. The method comprises the following steps that 1, the acidic waste water which contains the ammonium nitrate and the uranium and is obtained through uranium purification conversion is mixed with a sodium hydroxide solution, so that extraction primary liquid with the acidity ranging from 0.3 mol/L to 0.8 mol/L is obtained; 2, extraction is conducted on the obtained extraction primary liquid and a TBP-hydrogenized kerosene extraction agent with the volume percentage being 20-40%, wherein the two-phase flow ratio of the extraction agent to the extraction primary liquid is 1: (3-5); and 3, after extraction is completed, a loaded organic phase can be sent to a uranium purification conversion extraction procedure to be used as an extraction agent for extracting pulse columns, sampling analysis is conducted on a raffinate phase obtained after extraction, if the uranium content is less than or equal to 50 micrograms/L, the operation is returned to step 1 to be used for compounding the sodium hydroxide solution with the mass percentage being 30-50%, and if the uranium content is greater than 50 micrograms/L, the operation is returned to step 1, wherein a product is treated as waste water again. By means of the method, technological parameters are determined reasonably; the waste water treatment technology is optimized; the method is used for conducting uranium recycling treatment on the acidic waste water containing the ammonium nitrate and the uranium technologically; and the uranium yield is 99% or above all the time.

Description

technical field [0001] The invention relates to the technical field of uranium-containing wastewater treatment, in particular to a method for recovering uranium in acidic ammonium nitrate-containing uranium-containing wastewater. Background technique [0002] Uranium-containing wastewater treatment mainly includes evaporation concentration method, precipitation method, adsorption method, ion exchange method, membrane treatment method, extraction method, magnetic molecular method, and ion flotation method. Among them, the methods that have been widely used in industry mainly include evaporation concentration method, precipitation method, adsorption method, ion exchange method and extraction method. The evaporation and concentration method is not suitable for treating waste water containing volatile nuclides and foaming easily. It consumes a lot of heat energy and has high operating costs. At the same time, potential threats such as corrosion, scaling, and explosion must be co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B60/02C22B7/00C22B3/38
CPCC22B7/006C22B60/026C22B3/3846
Inventor 张慧忠魏刚高月华茹发全马晓文陆文博蒙秀君侯彦龙冯秀燕周会琴李浩然
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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