硫化銅鉱の水素による部分脱硫およびその塩酸浸出に関する研究
1984 年 100 巻 1151 号 p. 47-52
詳細
1984 年 100 巻 1151 号 p. 47-52
The activated leaching of chalcopyrite with hydrogen was investigated in this paper for the up-grading of copper concen-trates and the recovery of S as S° and of Fe as Fe304. Desulfurization of chalcopyrite with hydrogen was found to be most effective as compared to thermal decomposition under reduced pressure or in an inert gas stream. The reaction proceeds as shown below:
CuFeS2→β-chalcopyrite→bornite+Fe1-XS→Fe+bornite→Fe+Cu.
Coagulation of the dissociated FeS into a massive particles and formation of bornite phase surrounding it were observed under a light microscope. Also, it was found that partially reduced product was leached readily by hydrochloric acid solution with a vigorous evolution of H2S and Cu2S was formed. The residue with 73 to 79 per cent copper was obtained under optimum conditions. The dissolution of iron in bornite was affected significantly by nonstoichiometry of bornite and was slightly influ-enced on the acid concentration or leaching temperature.
