銅製錬工程を利用したシュレッダーダストリサイクル技術の確立

概要

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Recycling of shredder residues(SR) has been started in 1992 and was expanded the capacity in 2000 by charging them directly into two reverberatory furnaces which we have used for copper concentrates smelting since 1965. Directly charging SR into the reverberatory furnaces was so unique operation that a lot of technical problems arose after the expansion, such as dust troubles in boilers and electrostatic precipitators, corrosion of boiler tubes, damage to refractory of the furnaces and etc. SR treatment has increased due to overcoming such troubles, the amount of SR treatment reaches at 140,000 t per year in 2004 and Onahama Smelter and Refinery is one of the largest plants to treat SR in Japan.