A study was conducted for metal extraction from copper smelting dust using the oxidation leaching and control of potential technology.The effects of H2O2 dosage,H2O2 feeding speed,initial HCl concentration,leaching te...A study was conducted for metal extraction from copper smelting dust using the oxidation leaching and control of potential technology.The effects of H2O2 dosage,H2O2 feeding speed,initial HCl concentration,leaching temperature,liquid-to-solid ratio and leaching time on metals leaching efficiencies were investigated.The following optimized leaching conditions were obtained:H2O2 dosage of 0.8 mL/g(redox potential of 429 mV),H2O2 feeding speed of 1.0 mL/min,initial H2SO4 concentration of 1.0 mol/L,initial HCl concentration of 1.0 mol/L,leaching temperature of 80°C,initial liquid-to-solid ratio of 5:1 mL/g and leaching time of 1.5 h.Under the optimized conditions,copper and arsenic can be effectively leached from copper smelting dust,leaving residue as a suitable lead resource.The average leaching efficiencies of copper,arsenic and iron are 95.27%,96.82%and 46.65%,respectively.展开更多
The SKS furnace is a horizontal cylindrical reactor similar to a Noranda furnace,however,the oxygen enriched air isblown into the furnace from the bottom.Mechanism model of the SKS process was developed by analyzing t...The SKS furnace is a horizontal cylindrical reactor similar to a Noranda furnace,however,the oxygen enriched air isblown into the furnace from the bottom.Mechanism model of the SKS process was developed by analyzing the smeltingcharacteristics deeply.In our model,the furnace section from top to bottom is divided into seven functional layers,i.e.,gas layer,mineral decomposition transitioning layer,slag layer,slag formation transitioning layer,matte formation transitioning layer,weakoxidizing layer and strong oxidizing layer.The furnace along the length direction is divided into three functional regions,that is,reaction region,separation transitioning region and liquid phase separation and settling region.These layers or regions play differentroles in the model in describing the mechanism of the smelting process.The SKS smelting is at a multiphase non-steady equilibriumstate,and the oxygen and sulfur potentials change gradually in the length and cross directions.The smelting capacity of the SKSprocess could be raised through reasonably controlling the potential values in different layers and regions.展开更多
A computer model has been developed to simulate the distribution behaviors of Ni, Co. Sn. Ph,Zn, As, Sb, Bi, An and Ag in copper smelting process. The model assumes that the copper smelting furnaceis in thermodynamic ...A computer model has been developed to simulate the distribution behaviors of Ni, Co. Sn. Ph,Zn, As, Sb, Bi, An and Ag in copper smelting process. The model assumes that the copper smelting furnaceis in thermodynamic equilibrium. As many as 21 elements (Cu. S, Fe. Ni, Co. Sn, As, Sb. Bi, Ph. Zn.An. Ag. O, N, C, H, Ca, Mg, Al, and St) and 73 compounds are considered. This model accounts forphysical entrainment in the melts. The predictions by the present computer model are compared with theknown commercial data from Guixi Smelter in China, Home Smelter in Canada and Naoshima Smelter inJapan. The agreements between the computer predictions and the commercial data are excellent, so that thepresent computer model can be used to monitor and optimize the actual industrial operations of copper smelting. It is applicable to simulation of almost all copper pyrometallurgical processes.展开更多
基金Project(2016M602427)supported by the Postdoctoral Science Foundation of ChinaProject supported by the Fundamental Research Funds for the Central Universities of Central South University,China
文摘A study was conducted for metal extraction from copper smelting dust using the oxidation leaching and control of potential technology.The effects of H2O2 dosage,H2O2 feeding speed,initial HCl concentration,leaching temperature,liquid-to-solid ratio and leaching time on metals leaching efficiencies were investigated.The following optimized leaching conditions were obtained:H2O2 dosage of 0.8 mL/g(redox potential of 429 mV),H2O2 feeding speed of 1.0 mL/min,initial H2SO4 concentration of 1.0 mol/L,initial HCl concentration of 1.0 mol/L,leaching temperature of 80°C,initial liquid-to-solid ratio of 5:1 mL/g and leaching time of 1.5 h.Under the optimized conditions,copper and arsenic can be effectively leached from copper smelting dust,leaving residue as a suitable lead resource.The average leaching efficiencies of copper,arsenic and iron are 95.27%,96.82%and 46.65%,respectively.
基金Project(51620105013)supported by the National Natural Science Foundation of China
文摘The SKS furnace is a horizontal cylindrical reactor similar to a Noranda furnace,however,the oxygen enriched air isblown into the furnace from the bottom.Mechanism model of the SKS process was developed by analyzing the smeltingcharacteristics deeply.In our model,the furnace section from top to bottom is divided into seven functional layers,i.e.,gas layer,mineral decomposition transitioning layer,slag layer,slag formation transitioning layer,matte formation transitioning layer,weakoxidizing layer and strong oxidizing layer.The furnace along the length direction is divided into three functional regions,that is,reaction region,separation transitioning region and liquid phase separation and settling region.These layers or regions play differentroles in the model in describing the mechanism of the smelting process.The SKS smelting is at a multiphase non-steady equilibriumstate,and the oxygen and sulfur potentials change gradually in the length and cross directions.The smelting capacity of the SKSprocess could be raised through reasonably controlling the potential values in different layers and regions.
文摘A computer model has been developed to simulate the distribution behaviors of Ni, Co. Sn. Ph,Zn, As, Sb, Bi, An and Ag in copper smelting process. The model assumes that the copper smelting furnaceis in thermodynamic equilibrium. As many as 21 elements (Cu. S, Fe. Ni, Co. Sn, As, Sb. Bi, Ph. Zn.An. Ag. O, N, C, H, Ca, Mg, Al, and St) and 73 compounds are considered. This model accounts forphysical entrainment in the melts. The predictions by the present computer model are compared with theknown commercial data from Guixi Smelter in China, Home Smelter in Canada and Naoshima Smelter inJapan. The agreements between the computer predictions and the commercial data are excellent, so that thepresent computer model can be used to monitor and optimize the actual industrial operations of copper smelting. It is applicable to simulation of almost all copper pyrometallurgical processes.
