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为了改善镁质熔剂性球团矿质量,以唐钢提供的矿粉为原料,通过调整MgO含量,研究MgO含量对镁质熔剂性球团的影响。实验采用圆盘造球机造球,筛选出直径10~12.5 mm的生球测定生球性能并在竖炉中焙烧,然后进行抗压强度及冶金性能测定。结果表明:随着MgO含量的提高,生球抗压强度呈上升趋势,生球落下强度呈下降趋势,爆裂温度变化不大;球团抗压强度逐渐降低,当MgO含量达到2.4%时,降低趋势变缓,球团粘结现象增多;软化开始,温度略微升高,软化区间逐渐降低,还原膨胀率呈降低趋势,冶金性能得到明显改善。
In order to improve the quality of magnesia flux pellets, the ore powder supplied by Tangshan Iron and Steel Co., Ltd. was used as raw material. By adjusting the content of MgO, the influence of MgO content on magnesia flux pellets was studied. In this experiment, a ball pelletizer was used to make the pellet. The pellets with the diameter of 10 ~ 12.5 mm were selected to measure the pellet properties and roasted in a shaft furnace. Then the compressive strength and metallurgical properties were measured. The results show that with the increase of MgO content, the compressive strength of green pellets is on the rise, the dropping strength of green pellets is on a downward trend and the rupture temperature does not change much. The compressive strength of pellets decreases gradually. When MgO content reaches 2.4% The trend of slowing, pellet bonding phenomenon increased; softening began, the temperature slightly increased, the softening interval gradually decreased, reducing the expansion rate decreased, the metallurgical properties have been significantly improved.