Method for solving resin poisoning and blockage by in-situ leaching uranium mining

Abstract

The invention belongs to the technical field of neutral or alkaline leaching in-situ leaching uranium mining, and in particular, relates to a method for solving resin poisoning and blockage by in-situleaching uranium mining. In view of the phenomenon of resin organic matter poisoning, the prior art has many disadvantages, such as high consumption of reagents, high labor intensity of preparation,and influence of the properties of resin and introduction of OH<-> into the resin due to repeated soaking with high-concentration acids and alkalis, and causing of further hardening of resin during adsorption. The method comprises the steps: step 1, analyzing the composition of precipitates and the reasons of resin poisoning; step 2, determining a treatment scheme; step 3, backwashing with clear water; step 4, preparing reagents and soaking; step 5, backwashing with adsorbed tail liquor combined with compressed air; and step 6, observing and treating. Compared with conventional methods at homeand abroad, the method can effectively improve the work efficiency, has low cost, and has great advantages and utilization value.

Description

technical field [0001] The invention belongs to the technical field of neutral or alkaline leaching uranium mining, and in particular relates to a method for solving resin poisoning and blockage in ground leaching uranium mining. Background technique [0002] In the production process of neutral and alkaline leaching uranium mines, ion exchange resin poisoning and sediment clogging often occur. Resin poisoning not only reduces the saturation capacity of the resin, but also increases the consumption of post-treatment reagents and increases production costs; resin Clogging is a major problem faced by in-situ leaching uranium mining enterprises. Different mines have different processes and methods to deal with resin clogging, but none of them can effectively solve the problems of resin poisoning and clogging. [0003] The content of carbonate, pyrite, feldspar and organic matter in the ore of the Nalinggou uranium deposit is relatively high, and CO 2 +O 2 In situ leaching pro...

AI Technical Summary

Problems solved by technology

[0013] In view of the lack of resin poisoning and clogging techniques used in neutral or alkaline leaching uranium mines at home and abroad, according to the causes of resin poisoning and the physical and chemical properties of each sediment, without introducing other impurity ions and damaging the resin as little as possible In the case of special characteristics, the present invention provides an integrated process of resin detoxification and deblocking (a combined process of immersion in hydrochloric acid and hydrogen peroxide solution, compressed air agitation, and recoil of adsorption tail liquid) to treat blockage and organic matter poisoning resin, so as to eliminate resin The purpose of removing precipitates and restoring resin exchange capacity

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