| 摘要 |
PURPOSE:To rapidly melt an ore as raw material and to obtain metallic ferroalloy in high efficiency, by subjecting a CO gas generated from melting reduction of metallic ores or metallic oxides to secondary combustion by blowing an oxygen gas and by adding a metallic ore into the resulting high-temp. region. CONSTITUTION:In the reaction vessel 1, a metallic ore or metallic oxide is melted by means of carbon material and oxygen to form an iron bath 7 and slag 8 to undergo melting reduction. Further, the CO gas generated from proceeded decarburizing reaction in the reaction vessel 1 is subjected to secondary combustion at the point of time it comes up with passing through the above slag 8 by means of the oxygen gas blown from the upper part via a tuyere 5 for introducing oxygen. then ore fines are fed into the resulting temp. region as high as 2,000-odd deg.C via a tuyere 6 for introducing ore diagonally from the upper part. In this way, the above ore fines are rapidly heated and melted to undergo reduction, so that metallic ferroalloy can be formed in high efficiency.
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