Navoi Mining and Metallurgical Combinat, Navoi, Uzbekistan:

O. P. Vasilenok, Head of the Central Research Laboratory, vasilyonok@ngmk.uz
B. T. Ruziev Head of Uranium Geotechnology Facility of the Central Research Laboratory
I. A. Ivanova, Leading Production Engineer of the Uranium Geotechnology Facility of the Central Research Laboratory

This study is devoted to the effect of an oxidizer used in in-situ leaching of uranium on the behavior of an associated useful component – rhenium. The relevance of the study consists in the systematization of influence exerted by various oxidizing agents involved in in-situ leaching of uranium on the rate of rhenium transition to pregnant solution. As a result, it is possible to outline conditions for commercial recovery of rhenium. This work is important as it expands the research with a view to by-recovering scandium, vanadium and other valuable components from complex ore. The authors show that the most significant part in transition of rhenium to leach solution belongs to an oxidizer and its nature. This fact is confirmed by the studies of uranium and rhenium leaching at some deposits in the Tian Shan megaprovince. It is emphasized that without an oxidizer in a sulfurous medium, rhenium transition to pregnant solution to be processed by sorption is under 20–30% while with an oxidizer, rhenium transition exceeds 50–60%. The nature of an oxidizing agent is very important. The most active agents commercially applicable are identifi ed as hydrogen peroxide and sodium hypochlorite.

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