不锈钢渣熔融还原中铬在铁浴和熔渣间的分配行为研究

通过正交试验考察不锈钢渣铁浴熔融还原中反应温度、炉渣碱度、渣中Al2O3含量及铁水初始铬含量对铬在铁浴和碱性炉渣间分配行为的影响。试验在石墨坩埚内进行,还原剂为碳饱和铁水中的碳。试验结果表明,对影响渣中铬还原因素的显著性顺序依次为:炉渣碱度>渣中Al2O3含量>铁水初始铬含量>反应温度。此外采用模式识别方法对试验样本进行聚类分析和优化,以获得对渣中氧化铬还原的最佳参数。

Allotment Behavior of Chromium between Iron Melt and Molten Slag in Melting Reduction of Stainless Steel Slag

The effects of reaction temperature, slag basicity, Al2O3 content and initial Cr content in bath on allotment behavior of chromite between iron melt and molten slag were studied through orthogonal experiments for melting reduction of stainless slag. The experiments were carried out in a furnace with graphite crucible employing carbon saturated dissolved in liquid iron as a reducing agent. The results showed that slag basicity was the primary factor for chromium reduction, which was followed by Al2O3 content in slag, initial Cr content in iron bath and reaction temperature. Besides, Pattern-Recognition-Method was applied for classification analog and optimization of the experimental samples, from which better reduction parameters of chromium oxide in slag was obtained.