Uranium, iron, thorium and rare earth extraction and separation process

Abstract

The invention relates to a uranium, iron, thorium and rare earth extraction and separation process, wherein a UFe / ThRE-containing solution is subjected to extraction and separation with P350 in a hydrochloric acid system, a reducing substance is added to the obtained U-Fe-supported organic phase, the organic phase is subjected to washing-iron with a nitric acid solution to obtain the pure-U-supported organic phase and the raffinate containing bivalent iron, and the pure-U-supported organic phase is subjected to back extraction with a Na2SO4-containing H2SO4 solution so as to obtain the UO2SO4 solution. According to the present invention, with the introduction of the reducing substance into the process, the difficultly-separated trivalent iron and the hexavalent uranium can be effectively separated; and the whole process achieves the comprehensive utilization of the whole element.

Description

technical field

[0001] The invention is an extraction and separation process for uranium, iron, thorium and rare earth, specifically, UFe / ThRE is separated by using P350 in a hydrochloric acid system, and reducing substances are added in the U / Fe separation process to reduce ferric iron , to solve the effective separation of iron and uranium, to obtain uranium-containing substances and ferric nitrate products respectively, belonging to the field of rare earth hydrometallurgy. Background technique

[0002] Monazite is one of the important rare earth ores. This kind of ore also contains a considerable amount of uranium, which is a nuclear fuel urgently needed by the country at present, and contains a high content of thorium, which is a valuable resource for important nuclear fuel in the future. After monazite concentrate is extracted by traditional alkali decomposition-hydrochloric acid solution, the remaining radioactive thorium uranium (rare earth) solution slag also contain...

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