Bektai Erkin Kaldybayuly - specialist in the field of mineral processing and biogeotechnology. In 1983 he graduated with honors from the Moscow Institute of Steel and Alloys (MISiS) with a degree in physical and chemical studies of metallurgical processes. In 1988, he defended his thesis on the analysis and optimisation of flotation schemes for GOK enrichment (for example, copper-zinc ores of the Uchalinsky GOK (Russia). This methodology was used by E. K. Bektai in developing recommendations for such large CIS enterprises as Zyryanovsky GOK (Kazakhstan), mercury-antimony GOKs (Kyrgyzstan), Almalyksky GOK (Uzbekistan), GOK Apatity (Russia), Gaisky GOK (Russia), etc.
He conducted design assessment of a number of deposits in Kazakhstan, research on bioleaching of refractory gold-arsenic ores and concentrates. The possibilities of using biotechnology for underground leaching of uranium for objects of Kazatomprom JSC during semi-industrial tests are proved.
Currently, E. K. Bektai is a member of the UN expert group on the classification of mineral resources, an academician of the International Academy of Informatization ’(KazMAIN), as well as a coordinator of research work at the BioGeoTechnology of gold, uranium and polymetallic ores NAO" KazNITU them. K. I. Satpayev. "
Application of biogeotechnology in closed mining systems
The results of applying biotechnological methods for underground downhole leaching of uranium are shown. Two biotechnological plants with a capacity of 150 thousand m3 per year each were mounted and put into pilot operation on the geotechnological field of the uranium deposit. During the operation of these plants, an increase in ORP (redox potential) of 30% in the activated leach solution was achieved, as well as an increase in uranium in the productive solution by 10-20%. These indicators are achieved when working on two blocks of a uranium deposit. The use of this technology allows to reduce the cost of chemical oxidizing agents by 5-8 times, reduce the time required for well completion, and improve technical and economic indicators for PSR of uranium