INTENSIFICATION OF INHIBITOR-ASSISTED URANIUM ISL PROCESS
Kenzhetaev Z.S. Togizov K.S. Omirgali A.K. Aben E.Kh. Zhalikyzy R.
2023National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2023#2023Issue 3108 - 118 pp.
Decrease in filtration characteristics of ores under complex mining and geological conditions affects the dynamics of uranium extraction from the subsurface and increases the repayment period of technological units and operating costs. In this regard, prevention of gypsum sludging during the in-situ leaching (ISL) of uranium ores for its intensification at enterprises in the Republic of Kazakhstan is a crucial task. Development of productive horizon treatment techniques with specific reagents accounting the mineralogical composition of ores and the structure of sludge-forming materials shall increase the efficiency of the mining. The X-ray phase studies of core mineralogical composition and sludging of productive horizons in Santonian, Maastrichtian and Campanian ore intervals allowed determining the factors impacting the ore filtration characteristics. Laboratory tests on agitated leaching of uranium from core samples using inhibiting additives enabled to select an effective composition and concentration of chemical reagents to prevent the gypsum sludging. The process borehole experiments resulted in development of a technique for treatment of productive horizons with chemical inhibiting agents. Laboratory studies on effective inhibiting additives for uranium ISL processes led to formulation of a productive horizon treatment procedure to provide the intensification of uranium recovery under complex mining and geological conditions. The developed method of uranium ISL intensified production allowed increasing its efficiency and reducing production costs by 5-7%. Besides, it reinforced the environmental and industrial safety of the uranium ISL process.
inhibitor , leaching solution , productive solution , sludging , uranium content , uranium leaching , well operation cycle
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Satbayev University, Almaty, Kazakhstan
Satbayev University
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