著者

阿部 秀来

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.98, no.1133, pp.561-565, 1982-07-25 (Released:2011-07-13)

被引用文献数

2 1

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The trace amounts of gallium and indium are contained in the Black Ore type of deposits distributed at Hokuroku area in Akita. Gallium and indium tend to be concentrated into the zinc concentrates through mineral processing.Dowa Mining Co., Ltd. began to examine the recovering process of gallium and indium in 1963 whengallium was given attention as raw material of semi-conductor, and studied manysided technique to recover both metals fromthe by-product of zinc refinery. Our gallium and indium recovery process is characterized by the zinc residue treatmentprocess of The lijima Zinc Refinery of Akita Zinc Co., Ltd. which is very useful to concentrate both metals, and also by thesolvent extraction process to separate gallium and indium from the sulfuric acid solution.Considering how to solve the problem derived from the application of the technique to the plantoperation, gallium recovering plant was constructed in Kosaka Smelter of Dowa Mining Co., Ltd. simultaneously with theconstruction of Iijima Zinc Refinery.Operation started in January 1972, and is producing high quality gallium and indium. Though only 40kg/m ofmetallic gallium and some indium hydroxides were produced when started, now 180kg gallium and 250kg indium areproduced every month.