Abstract
Toyama Showa Denko Co., Ltd.(TSK) is situated in the industrial area near by the Toyama port. TSK is smelting ferro-alloys such as ferro-nickel, ferro-chromium and ferro-molybdenum, and these products are mainly used for stainless steel making.TSK had been Toyama works of Showa Denko Co., Ltd., but became the subsidiary of Showa Denko Co., Ltd. on January 22, 1979.Since we started ferro-nickel smelting in 1969, we have had much experience about it during more than ten years.At present, we go on smelting ferro-nickel, based on the rotary kiln-electric furnace process. The annual capacity of this process is about 4500 tons of nickel.TSK is dependent for its raw material ores on garnierite obtained from the nickel oxide deposits in areas such as New Caledonia and Indonesia. Garnierite is a rich siliceous ore of which the nickel content varies between 2.3-2.6%. Our process is to calcine these ores in the rotary kiln and to reduce the hot materials in the electric furnace. In this paper, the outline of our smelting process, and improvements of plants are described.
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