Abstract
Saganoseki Smelter & Refinery increased the annual production capacity from 240, 000 metric tons to 300, 000 metric tons in 1982, together with improvements of environmental protection and impurity removal. These made the Saganoseki smelter a pollutionless and the largest scale coastal smelter, both in name and reality. However, Saganoseki was forced to operate at low production rate for about six years since then because of the economic deterioration, facing a crisis of its existence. In 1989, Japanese economy turned to prosperity and the copper market recovered allowing Saganoseki to operate at its full capacity.In 1991, Saganoseki attained a reinforcement of its production capacity to 330, 000 metric tons per annum without the increase of the number of main smelting facilities. Technological and operational improvements made at Saganoseki for a last decade are introduced in this paper dividing into four areas of topics, that is, smelting, sulfuric acid production, electrolytic refining and utility supply.
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