Deionization treatment method for groundwater in neutral in-situ leaching uranium mining well site

A technology for in-situ leaching uranium mining and treatment method, which is applied in the field of deionization treatment of groundwater in neutral in-situ leaching and mining uranium well sites, can solve the problems of large power consumption of reverse osmosis process equipment and the like, and achieve the effect of low energy consumption

Inactive Publication Date: 2019-02-19
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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Problems solved by technology

Long-term practice has found that the reverse osmosis process equipment consumes a lot of power, and the secondary wastewater is generated by backwashing after dosing

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  • Deionization treatment method for groundwater in neutral in-situ leaching uranium mining well site

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[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like figure 1 As shown, the neutral ground leaching mining uranium well site groundwater deionization treatment method steps of the present invention are as follows:

[0021] Step 1: The groundwater at the well site lifted by the deep well pump to the sump is first filtered through quartz sand and bag filter, and its suspended solids (SS) and chemical oxygen demand (CODcr) reach the following indicators: SS≤5mg / L , CODcr≤200mg / L, before proceeding to the next step.

[0022] Step 2: The wellsite groundwater (hereinafter referred to as raw water) after filtering up to the standard continues to enter the composite electrode composed of graphene, activated carbon fiber and activated carbon, and the working process and regeneration process are carried out in sequence, and the two processes are cyclical.

[0023] The third step: the workin...

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Abstract

The invention belongs to the technical field of groundwater treatment, in particular to a deionization treatment method for groundwater in a neutral in-situ leaching uranium mining well site. The method includes the following steps that: the well site groundwater lifted from a deep well pump to a liquid collection tank is first filtered by quartz sand and bag filter; and the well site groundwaterafter filtering up to the standard is called raw water, and the groundwater continues to enter a composite electrode, the working process and regeneration process are carried out in sequence, and thetwo processes are cyclic. The method can realize the recycle rate of the clear liquid of 50 %-85 %, the uranium concentration of the clear liquid is less than 5 mg/L, the conductivity is less than 300us/cm, and the TDS, sulfate and total hardness of the clear liquid can meet the requirements of the second-class groundwater quality standard. Compared with the traditional RO method, the energy consumption is low and no secondary pollution is generated. The generated purified water can be reused for the process steps of dispensing medicine and the like in the front section of a system; and meanwhile, the generated concentrated liquid can return to the front end of leaching of uranium ore for further enrichment through ion exchange process.

Description

technical field [0001] The invention belongs to the technical field of groundwater treatment, and in particular relates to a deionization treatment method for groundwater in a neutral ground leaching uranium mining well site. Background technique [0002] At present, the standards for groundwater treatment and restoration of in-situ leaching mines in my country are in a blank stage. Large-scale adoption of CO 2 +O 2 The United States, where the in-situ leaching uranium mining process is used, implements a mine production license system, requiring in-situ leaching mines to propose a groundwater treatment plan and put it into practice before mining, and the government department decides whether to issue a mining license based on the experimental results. The decommissioning management method of in-situ leaching mines implemented is divided into three stages, cleaning stage, deionization reinjection stage and reduction precipitation stage. Among them, the deionization proces...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F103/06
CPCC02F1/001C02F1/4691C02F2101/006C02F2103/06C02F2209/055C02F2209/08C02F2209/10C02F2301/08C02F2303/14
Inventor 陈乡原渊周根茂
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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