An Experimental Study on Copper Recovery from Cu-Pb-S Base Cu Matte

摘要

The acid/chloride direct leaching of copper matte wasexperimentally studied for the optimization of the Korea Zinc copper recoveryprocess. In leaching, the effects of key operational parameters such as particlesize distribution, concentrations of chloride, sulfuric acid, and ferric ions, andleaching time were studied. The rate of copper dissolution in acid and ferricions was found to be dependent upon both the leaching temperature andparticle size distribution of Cu-matte. The copper recovery rate increased withthe decrease in particle size, whereas it increases parabolically with theincrease in the leaching temperature from 60 to 900C. The activation energyof the copper leaching reaction was found to be 12.1 kcal/mole. In theelectrowinning of copper from the filtrate, the surface morphology ofelectrowon copper was strongly dependent upon the initial concentration ofsulfuric acid. The efficiency was also adversely affected by the increasingconcentrations of sulfuric acid, chloride ions, and total iron (Fe~(+2) / Fe~(+3)),within our experimental range. The current efficiency decreased with theconcentrations of both chloride and total iron. The optimum concentration ofsulfuric acid seemed to be 120-140 g/#iota#, while that of total iron was lessthan 4 g /#iota#.