Treatment of EAF Dust at Sotetsu Metal Co., Ltd.

Abstract

Sotetsu Metal Co., Ltd. was established in 1974 and started operation of Waelz kiln plant for treatment of EAF dust. In 1996, Sotetsu plant installed two Waelz kilns in series. At present, Sotetsu plant treats 70,000 tons of dust and produces 24,000 tons of crude zinc oxide and then 18,000 tons of high grade zinc oxide per annum. The chemical composition of the high grade zinc oxide is 78wt%Zn, 1.1wt%Fe, 0.02wt%Pd, < 0.01wt%Cl and < 0.01wt% F, and it can be used as a raw material of zinc electrowinning.