著者

一ノ瀬 幸夫

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.97, no.1122, pp.676-680, 1981-08-25 (Released:2011-07-13)

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Hachinohe Smelting Company was established on Feb. 1st, 1967 as a joint toll smelter to take advantage of the Imperial Smelting Process to treat mixed and complex ores, especially some concentrates from “black ore” in Tohoku district of Japan and concentrates from Huanzala Mine in Peru. The Hachinohe ISF plant was commissioned in Feb., 1967, and has beensu ccessfully operating with excellent performances.The Smelter Complex consists of sinter plant, acid plant, furnace plant, and zinc refinery. The sinter plant employs the Lurgi type sintering machine, while acid is produced in Lurgi type double contact acid plant. Some parts of crude zinc producedb y the ISF is further refined by its own reflux ing refining plant. Bullion is shipped without refining.Since the, operation commencement, various improvements and modifications have been constantly applied to make the plant competitive, emphasizing the theme of “conservation and recovery of energy”. A typical example of the efforts is incorporation of power generator which utilizes waste heat of the furnace off-gas. Now the plant is trying to further strengthen its ability to cope with low production.rate forced by current unfavorable situations surrounding zinc industry