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应用含镁添加剂,并配以膨润土,对铁矿球团进行了实验室试验。试验研究表明:添加轻烧白云石和镁砂对提高生球质量能起到一定的促进作用,而镁橄榄石的影响较小;随着添加剂用量的增加,三种球团矿的抗压强度均显著降低,其下降幅度由大到小依次为镁砂球团、轻烧白云石球团和镁橄榄石球团;适当提高焙烧温度,延长焙烧时间,有利于提高球团的抗压强度。另外,冶金性能研究也表明:随着添加剂用量的增加,球团还原度和软熔性能有一定提高,低温还原粉化和还原膨胀性能显著改善。
Application of magnesium additives, together with bentonite, iron ore pellets conducted a laboratory test. The experimental research shows that the addition of light-burned dolomite and magnesia can promote the quality of green ball to a certain extent, but the effect of forsterite is small. With the increase of the amount of additives, the compressive strength of the three pellets are Significantly decreased, the descending order descending order of magnesia pellets, light-burning dolomite pellets and forsterite pellets; appropriate increase in calcination temperature, prolonging the firing time is conducive to improving the pellet compressive strength. In addition, the metallurgical properties also show that: with the increase of the amount of additives, pellet reduction and reflow properties have increased to a certain extent, low temperature reduction pulverization and reduction and expansion significantly improved.