The method of extraction of uranium from ores

 

(57) Abstract:

The invention relates to the processing of uranium ores. Effect: decrease after desorption of the residual capacity of the anion exchange resin for uranium, the loss of uranium from the liquid phase discharged pulp. The extraction of uranium from ores carried out by successive application of crushing, ore grinding, acid leaching of the ore pulp, sorption of uranium anion exchange resin desorption of uranium from saturated anion exchange resin solutions of sulfuric and nitric acids, extraction peredishki trade fraction decorativ organic mixture. Treatment of the anion exchange resin after desorption of uranium are sernistokislogo a refined extraction, followed by washing the resin with water from excess acidity, filing washed of the anion on the sorption of uranium and washing solutions after treatment of the anion with refined extraction - making a Stripping solution. 3 table.

The present invention relates to the field of chemical technology and can be used in the hydrometallurgical processing of uranium ores.

There is a method of uranium ore processing, including crushing, grinding ore by sulfuric acid wyborami sulfuric and nitric acids, extraction cleaners commodity fractions decorativ mixture of extractants, with the formation of sernistokislogo refined and the subsequent receipt of oxides of natural uranium, the return of refined extraction on the operation of the leaching [Laskaris B. N. and other Bustytranny method of processing of uranium ores. Atomic energy, 1977, T. 43, No. 6, S. 477-480].

The disadvantage of this method is the dilution of the pulps refined extraction on the leaching step.

The closest adopted for the prototype, is the method of extraction of uranium from ores, including crushing, ore grinding, acid leaching of the ore pulp, sorption extraction of uranium anion exchange resin desorption of uranium from saturated anion exchange resin solutions of sulfuric and nitric acids, extraction cleaners commodity fractions decorativ organic compound with the subsequent receipt of oxides of natural uranium, the return of refined extraction on the preparation of the Stripping solution [Gromov B. C. Introduction to chemical technology of uranium. M, Atomizdat, 1978, S. 146, 195].

The disadvantage of this known method is the high residual capacity of uranium in the anion exchange resin supplied to the sorption, which leads to increased losses of uranium th capacity of the anion exchange resin for uranium after desorption, resulting in reduced loss of uranium from the liquid phase discharged pulp.

This is achieved in that in the method of extraction of uranium from ores, including crushing, ore grinding, acid leaching of the ore pulp, sorption extraction of uranium from the liquid phase of the pulp resin, desorption of uranium from the resin solutions of sulfuric and nitric acids, extraction cleaners commodity fractions decorativ organic mixture with the formation of sernistokislogo refined, the subsequent receipt of oxides of natural uranium, according to the invention the anion exchange resin after desorption is subjected to additional processing sernistokislogo a refined extraction, containing minimal concentrations of uranium, the treated anion exchange resin is rinsed with water from excess acidity and serves on the sorption of uranium and washing solutions after treatment of the anion with refined extraction is directed to the preparation of the Stripping solution.

The proposed method is compared with the known provides a significant improvement in sorption-desorption.

The following are examples of the extraction of uranium from ores on known and proposed methods. For treatment of the anion used the refined extraction, with whom xtracey:resin=1:2. Comparative data on the content of uranium in the anion exchange resin after desorption on known and proposed methods are given in table.1.

It is known that the processes of sorption, desorption of uranium from solutions and slurries occur due to the diffusion of ions of uranyl sulfate inside the grain of the anion. Obstacle to implement the mass transfer process can serve as a steric hindrance caused by the shielding of the active groups of the anion exchange resins of various compounds formed in the phase of the anion in the process of sorption of uranium, for example of silicon dioxide, iron compounds, molybdenum and other Processing of the anion exchange resin after desorption of uranium refined extraction allows additional decarbonate uranium inside the grain, and to reduce the residual capacity of uranium.

In table.2 shows the results of the sorption of uranium in the area of its low concentration in the liquid phase of the pulp, and table.3 - indicators for the saturation of the anion of the richest in uranium content of the solution after desorption him on known and proposed method.

From the above table.1-3 data suggest that the proposed method of extraction of uranium from ores can reduce the residual capacity of the anion ptx2"> In General the presented data show that the proposed method is compared with the known provides a higher extraction of uranium.

The method of extraction of uranium from ores, including crushing, grinding, ores, sulfuric acid leaching of the ore pulp, sorption extraction of uranium from the liquid phase of the pulp resin, desorption of uranium from the resin solutions of sulfuric and nitric acids, extraction cleaners commodity fractions decorativ organic mixture with the formation of sernistokislogo refined and the subsequent receipt of natural uranium oxides, characterized in that after desorption of uranium anion exchange resin is subjected to additional processing sernistokislogo a refined extraction, containing minimal concentrations of uranium, the treated anion exchange resin is rinsed with water from excess acidity and serves on the sorption of uranium and washing solutions after treatment of the anion with refined extraction is directed to the preparation of the Stripping solution.



 

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