高比例褐铁矿烧结机理分析及试验研究

Mechanism Analysis and Experimental Research on High Ratio Limonite Sintering

阐述了高比例配用褐铁矿对烧结过程的影响机理。褐铁矿比例提高时,由于其高同化性,不仅烧结过程中液相生成量增多,而且液相性质也发生改变,烧结过程中出现液相粘度升高、气泡难以溢出等现象,最终导致烧结利用系数下降,成品率降低;通过采取压料、厚料层、高碱度、防止过度同化等措施,可以为提高褐铁矿配比提供支撑。针对首钢某地料比的实验室研究表明,通过优化配矿,烧结配加50%褐铁矿后,生产指标较配30%褐铁矿时有所改善。

Mechanism of effect of high ratio limonite on sintering process was reviewed. When the limonite ratio increases, due to its high assimilability, not only does the liquid phase produce increase in the sintering process, but the liquid phase behavior also changes. In the sintering process, the liquid phase viscosity increases and the bubbles are difficult to escape, which finally result in decrease of sintering productivity and product yield. By taking such measures as pressing feed, deep bed layer, high basicity and preventing excess assimilation, support is provided for high ratio of limonite. The experimental study in Shougang on material ratio shows that, through proportioning optimization, after addition of 50% limonite, the production indexes are somewhat improved in comparison with addition of 30% limonite.