ニッケル・コバルトの溶媒抽出法による分離精製の工業化
1979 年 95 巻 1098 号 p. 441-445
詳細
1979 年 95 巻 1098 号 p. 441-445
In 1975, Sumitomo Metal Mining Co., Ltd. made a significant success on the foundation of a new plant for nickel and cobalt recovery from their sulfide mixtures and cobalt' hydroxide precipitate supplied by Marinduque Mining Co., Ltd. of Philippine and Sumitomo's conventional nickel refinery respectively by means of most advanced hydrometallurgical techniques including solvent extraction.
The Sumitomo's fully hydrometallurgical process developed for nickel and cobalt recovery covers the following technical features:
1) Nickel and cobalt separation by company's own solvent extraction technique
2) Production of electrolytic nickel and cobalt plate from their chloride solutions by electrowinning
3) Recovery of chlorine gas generated in electrowinning process followed by hydrochloric acid production
4) Gypsum production and ammonia recovery from ammonium sulfate solution ejected in solvent extraction process
Since the operations on commercial scale have been commenced in September of 1975, company has made great efforts to improve the process. And at present time, a new plant is in a position to provide electrolytic nickel of maximum 2, 500 t/Y and electrolytic cobalt of maximum 1, 500 t/Y, as well as some amount of their by-products such as nickel chloride, cobalt oxide, cobalt nitrate and so on without any major trouble.
