WebWithout a reliable design method for the leaching and seepage step of in situ leaching (ISL), problems such as low comprehensive resource recovery rate and frequent geological … WebJul 16, 2024 · After 6 h, the permeability changes little and tends to stability. In this process, magnesium ions interact with rare earth ions in solution. In 5 h of MgSO 4 leaching, the …
(PDF) Experimental Study on the Permeability of Rare Earths with ...
WebOct 17, 2024 · To better understand the permeability of uranium sandstone, improve the leaching rate of uranium, and explore the change law of pore structure characteristics and blocking mechanism during... WebJun 1, 2024 · In terms of physical factors, the uranium leaching rate depends on the extent of change of the sandstone porosity and permeability. In terms of chemical factors, the leaching rate improves by increasing the temperature of the leaching solution and amount of CO2 and O 2 dissolved in the water. sb 212 california
Evolution of pH during in-situ leaching in small concrete cavities ...
WebSmall amounts (0.4 cc) of neutral water placed in small cylindrical cavities (5 mm diameter) in concrete exposed to 100% relative humidity first developed a pH comparable to that of a saturated Ca(OH)2 solution. The pH then increased over a period of days-weeks toward a higher terminal value. A micro pH electrode arrangement was used. This behavior was … WebJan 6, 2024 · CO2 + O2in situ leaching has been extensively applied in uranium recovery in sandstone-type uranium deposits of China. The geochemical processes impact and constrain the leaching reaction and leaching solution migration; thus, it is necessary to study the CO2 + O2–water–rock geochemical reaction process and its influence on the physical … Webpermeability, capacity of a porous material for transmitting a fluid; it is expressed as the velocity with which a fluid of specified viscosity, under the influence of a given pressure, … sb 2128 texas 2019