Method for microbiological leaching of uranium-molybdenum ore and enrichment and separation of uranium and molybdenum

Abstract

The invention discloses a method for microbiological leaching of uranium-molybdenum ore and enrichment and separation of uranium and molybdenum. The method comprises a microbiological leaching method of uranium-molybdenum ore and an enrichment and separation method of uranium and molybdenum in a leachate; in the leaching method, an oxidizing agent for leaching the uranium-molybdenum ore is biological high iron, namely an acidophilous acidithiobacillus ferrooxidans solution containing the biological high iron. The method comprises the following specific steps: firstly crushing the uranium-molybdenum ore so that the crushed materials with the granularity of above 200 meshes account for more than 50% of the total amount and the crushed materials with the granularity of 30 meshes account for not more than 10% of the total amount; then infiltrating the crushed uranium-molybdenum ore in a biological oxidizing agent solution, carrying out solid-liquid separation after infiltrating, and then carrying out ion exchange on the microbiological leachate of the uranium-molybdenum ore by using 201*7 resins, and carrying out iron elution, uranium elution and molybdenum elution. In the method, the uranium leaching rate is above 80%, the molybdenum leaching rate is within the range from 60% to 70% or above, and the molybdenum leaching rate is increased by 20-30%; the uranium, molybdenum and iron in the leachate are eluted by using a PH1.0 solution by virtue of an ion exchange column, and the removal rate of the iron is above 95%, the adsorption rate of the uranium and the molybdenum is not affected, the uranium and the molybdenum adsorbed on the resin are desorbed by using different desorption reagents step by step, and the recovery rate of the uranium and the molybdenum is above 80%.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and relates to a method for microbial leaching of uranium and molybdenum ore and enrichment and separation of uranium and molybdenum. Background technique [0002] Uranium and molybdenum have many similarities in geochemical properties, therefore, uranium and molybdenum often co-migrate and symbiotically enrich. Uranium and molybdenum are important resources for national defense. There are two kinds of uranium and molybdenum symbiotic resources: one is based on uranium resources, with the recovery of by-product molybdenum; The uranium-molybdenum ore belongs to the latter. [0003] The content of U in the raw ore of uranium-molybdenum ore is 0.135%, the content of Mo is 1.70%, the content of pyrite is 10%, and the molybdenum oxide is mostly distributed among the quartz grains; the colloidal molybdenum ore is mostly wrapped by pyrite or quartz , the uranium-molybdenum ore wrapped in sulf...

AI Technical Summary

Problems solved by technology

At present, the uranium-molybdenum ore leaching solution adopts extraction and stripping to enrich and separate uranium and molybdenum. The extraction process is complicated, and it is easy to cause secondary pollution of organic substances in the industrial water environment, and the effect is not ideal.

[0006] It can be seen that there are still many deficiencies in the existing technology, especially the leaching technology and the enrichment and separation technology still need to be further optimized and innovated.

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