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chosen in the experiments. The results show that the increase of temperature, concentrations of ammonia and ammonium sulphate is propitious to the leaching rate of copper ore. The leaching rate... that the leaching rate was controlled by interface transfer and diffusion across the product and the activation energy was 15 kJ/mol. Tangdan oxidized copper ore, which contains high-grade calcium magnesium......
concentration, particle size of crude ore and agitation rate on the leaching efficiency of copper were also evaluated. And the kinetic equations of the leaching process were obtained. The results show... of agitation rate on leaching process of copper At leaching time of 1 and 3 h, and the mass ratio of liquid to solid of 5?1, H2SO4 concentration of 50 g/L and core sample granularity of 0.200-0.125 mm......
Simulated small-scale pilot heap leaching of low-grade copper sulfide ore with selective extraction of copper QIN Wen-qing(覃文庆), ZHANG Yan-sheng(张雁生), LI Wei-zhong(黎维中), WANG Jun(王 军) School... extraction of copper were investigated. Lix984 dissolved in kerosene was used as extractant. The results show that it is possible to selectively leach copper from the ores by heap leaching. The copper......
; copper sulphides; bioleaching; leaching ratio; surface morphology ... flow is a prevailing phenomenon within the dump leaching[12]. The leaching rate and recovery efficiency of the dump are influenced by the preferential solution flow, so the practice of this technology......
brings some disadvantages such as slow rate of reaction and leaching, or in acid medium in pressure oxidative leaching [7, 8]. The multi-metal copper alloy obtained from the industrial slag is multi... on the leaching of copper. The copper recovery rate stayed the same when the stirring speed was more than 250 r/min and other experimental conditions were kept constant. 5.2 Effect of leaching temperature......
J. Cent. South Univ. (2020) 27: 2249-2258 DOI: https://doi.org/10.1007/s11771-020-4446-3 Separation of silicon and iron in copper slag by carbothermic reduction-alkaline leaching process WANG Hong... solution; carbothermic reduction; alkaline leaching Cite this article as: WANG Hong-yang, SONG Shao-xian. Separation of silicon and iron in copper slag by carbothermic reduction-alkaline leaching......
and the modeling process of grey system theory. It was used for forecasting the rate of copper extraction from the primary sulfide ore during a laboratory microbial column leaching experiment... and mineral processing, etc. The leaching rate of such copper sulphide ore is low. The grey forecasting result indicates that the rate of copper extraction is approximately 20% even after leaching for six......
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were chosen as parameters in the experiments. The results show that temperature, concentration of ammonia and ammonium chloride have favorable influence on the leaching rate of copper oxide ores.... And it is considered difficult to be leached out. 3.2 Effect of operation parameters on copper leaching rate The effect of particle size, concentration of lixiviant, solid-to-liquid ratio and temperature......
Intensification of pretreatment and pressure leaching of copper anode slime by microwave radiationYANG Hong-ying(杨洪英)1, MA Zhi-yuan(马致远)1, 2, HUANG Song-tao(黄松涛)2, LV Yang(吕阳)1, XIONG Liu(熊柳)1(1... 100088, China)Abstract:The application of microwave irradiation for pretreatment of copper anode slime with high nickel content prior to pressure sulfuric acid leaching has been proposed. The microwave......
