Comprehensive Recovery Of S~0 From Residues Of Hot-press Acid Leaching Of Copperbearing Gold Concentrate Using Kerosene Method

There is about 15% sulfur remaining in leach residue of copper-bearing gold concentrate. It will influence gold extraction and increase consumption of NaCN in the latter process if the sulfur is not recovered. And it will also do harm to the environment if the residue of copper-bearing gold concentrate is deposited in the air directly. Chemical method, using organic solvent, was still used in industry. However, till now using kerosene, tetracarp, dimethylbenzene, cyclohexane as solvent to extract sulfur has been little study.Leaching technical process which used kerosene, tetracarp, dimethylbenzene, cyclohexane as different desulur solvent for leach residue of copper-bearing gold concentrate was studied in this thesis. This experiment method using kerosene and tetracarp was applied to the leaching process in order to explore the optimal operation condition including heating time, temperature and ratio of kerosene to residue. The operation condition using dimethylbenzene and cyclohexane as desulur solvent was also investigated in this paper.Studies showed that using suitable, wellbehaved organic solvents can achieve high leaching efficiency, the working condition is simple and mild, and the sulfur quality is good; The solvent can be recycled and environmentally friendly. But it is more important to strengthen safety supervising in process for the inherent characteristic of organic solvent.