|  | 10/08/2004 |
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Sumitomo Metal Mining Uses More Oxidation Zinc Ore at Harima
Sumitomo Metal Mining increases usage of oxidation zinc ore, which is made from steel making dust, to 50% of raw materials at Harima zinc smelter in Hyogo from current 30%. The smelter with Imperial Smelting Process, which smelts zinc and lead at same time, tries to shift recycling materials when European zinc smelters with ISP stop operations one after another due to low productivity.
The firm uses steel making dust, which is produced at electric furnace steel makers and contains 20% of zinc, for the zinc and lead unit by concentrating to around 60% of zinc purity making oxidation zinc sintered mine and briquette at Shisaka plant in Ehime. The firm transport the raw materials to Harima and adds lead ore at sinter process. The firm uses the materials to smelt zinc and lead like smelting with ore. The Harima smelter has 8,000 tonnes per month of distillation zinc output capacity and 2,600 tonnes of electrolytic copper, in which the plant uses 400 tonnes.
Traditional raw materials of bulk ore containing zinc and lead is cheaper because they are smelted only by ISP, not by general electrolytic process. However, the steel making dust is cheaper than the traditional ore as recycling material. The ISP is expected for environmental friendly method by recycling zinc to smelting because the process has advantage in removal of impurities.
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 | Sumitomo Metal Mining Uses More Oxidation Zinc Ore at Harima
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