Sustainable Mining and Metallurgy

A certain amount of ferroferric oxide will be produced in the process of smelting concentrate by oxygen-enriched air oxidation in side-blowing furnace. When the ferroferric oxide content in slag is too high, the viscosity of melt will increase and accretion will form in the bath to make the furnace bottom rise so as to reduce the bath volume. In more serious situation, the foamed slag will be produced, resulting in slag-spillage accident. In this article, by combining the production practice of side-blowing smelting furnace, the ferroferric oxide generation in smelting process in side-blowing furnace and controlling measures were discussed, and the elimination measures of ferroferric oxide in various parts were introduced. The results show that the main cause of ferroferric oxide is its inclusion in raw material and slag peroxidation. In production, the ferroferric oxide content can be controlled by means of controlling the content of ferroferric oxide and high-melting-point impurities in raw material, adjusting coal feed amount, adding appropriate amount of quartz and other measures.