论文部分内容阅读
为改善球团矿的冶金性能,进行了含MgO球团矿的冶金性能试验研究,分析了不同MgO添加方式造球工艺的效果。结果表明,在合理的MgO添加方式下,对含MgO球团矿,氧化镁含量由0.6%提高到1.8%后,球团矿RDI+3.15由62.2%增加到约75%,还原度RI由34%增加到45%～53%(900℃还原1h),还原膨胀指数RSI(还原度40%)由23%降低到约20%,且软熔温度明显提高,冶金性能改善。认为提高氧化镁含量的方式应当是菱镁石或含MgO精矿粉,避免添加白云石。
In order to improve the metallurgical properties of pellets, the metallurgical properties of the pellets containing MgO were investigated. The effects of different MgO addition methods on pelletizing were analyzed. The results showed that the RDI + 3.15 of the pellets increased from 62.2% to about 75% for MgO-containing pellets and the content of magnesia increased from 0.6% to 1.8%. The reduction RI was from 34 % To 45% -53% (900 ℃ for 1h), the reduction swelling index RSI (reduction degree 40%) decreased from 23% to about 20%, and the reflow temperature increased obviously and the metallurgical properties improved. It is believed that the way to increase the content of magnesia should be magnesite or MgO concentrate powder, to avoid adding dolomite.