黄銅鉱湿式製錬プロセス研究開発の現状

概要

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Recently, SX - EW process for copper oxide is getting very popular. This process, however, is not applicable for chalcopyrite. Therefore, the development of new hydrometallurgical processes in which chalcopyrite is efficiently refined is essential. In these processes, the Cuprex process and the Intec process are introduced for the chloride solution process, and then, the CESL copper process and the total pressure oxidation process are also introduced for the pressure leaching process in sulfuric acid solution. The cuprex process has the solvent extraction process using Acolga reagents, and the Intec process has the electrowinning process using BrCl- 2(Halex). In the CESL process almost all of sulfur is recovered as an elemental sulfur through pressure leaching process. On the other hand, in the total pressure oxidation sulfur is almost completely to be oxidized to sulfate ion. Generally, hydrometallurgical processes have several advantageous points; 1) SOx is not exhausted, 2) capital cost and running cost are cheaper, 3) grade of concentrate and impurities do not affect the operation so much, 4) facilities are more compact, and so on.
社団法人資源・素材学会の論文
2000-01-25