Refractories of Flash Furnaces in Japan
The first flash smelting in Japan began at Ashio Smelter in 1956. Since then many improvements have been made. In 1962, productivity increased three times from the first stage of development. Flash smelting offers great advantages in the use of reaction heat and recovery rate of sulfur, while reducing air pollution. The operating ratio of this smelting process at the early stage of development was not high enough because of problems of high copper loss in the slag, boiler troubles, and damages to refractories. Engineers of Furukawa Company in Ashio Smelter solved these problems one by one, and advised the building of the smelters listed below:
The productivity of one flash furnace was previously thought to be 5,000 tons per month; now some furnaces produce more than 10,000 tons per month. Such increased productivity is largely due to the refractory structure developed in Ashio.
Dowa Mining, Kosaka Smelter 1967
Nippon Mining, Saganoseki Smelter 1970, 1973
Sumitomo Metal Mining, Toyo Smelter 1971
Hibi-Kyodo Smelting, Tamano Smelter 1972
Nippon Mining, Hitachi Smelter 1972
KeywordsFlash Smelting Flash Furnace Reaction Shaft Shaft Journal Slag Line
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© The Minerals, Metals & Materials Society 1980