The copper concentrate is leached by catalyzing and oxidizing process, and the leaching rate is more than 98% on the following optimum conditions: 0.2 mol/L catalyst, 2 mol/L NaCl, 3mol/L H 2SO 4, L∶S=5∶1, 85℃, 6h.
The yield,grades of copper,silver and lead for the copper concentrate are 12.79%,21.05%,286.30g/t and 4.59%,respectively. The copper recovery is up to 93.40%,and the total recovery of silver is 81.11%.
Copper was extracted directly with LIX973(1+2) kerosene system at pH=1.2 in the high sulfated copper solution leached pressure from the gold copper concentrate ore, in which the iron, zinc needn't separated. The recovery of copper was 99.92% through three series simulation countercurrent extracting.
The optimum conditions of technology are:the amount of additional agent is 4%~6% of copper concentrate ore powder,the roasting time is 3 hours , the leaching time is 2.5~3 hours . In leaching solution,the amount of sulfuric acid is controlled 55~60 g/L.
Using solvent extraction to separate Fe3+ from the leaching solution of arsenic-bearing sulfide copper concentrate ore is an important step of the process for preparing copper arsenate. P204 can extract Fe3+ from sulphate solution selectively.
A Practicable technology for comprehensive utilization of cyanide residues was described in this paper. The flowsheet of bulk flotation-separation was advanced to recover Cu and Au from cyanide residues. Cu-concentrate containing Cu 17.21%,Au9.38g/t,Ag2212.86g/t and S-concentrate containing S42.12% were obtained by this technology.
The procedures were applied to the determination of palladium in standard reference samples of copper-nickel ore and copper concentrate.
Distribution of Copper, Nickel, Cobalt and Iron between Products of Smelting of Copper Concentrate Obtained by Flotation of Conv
The results obtained were applied to the determination of mercury in a copper concentrate.
A laboratory-scale cell for the continuous electrolytic reduction of chalcopyrite contained in copper concentrate is described.
A purely instrumental neutron activation analysis method, using high resolution gamma-ray spectrometry with intrinsic Ge and Ge(Li) detectors, has been used for the analysis of trace elements in copper concentrate samples.