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秘鲁磁铁矿粉具有粒度细、品位高、脉石含量低等优点,但其碱金属含量相对较高,且SiO2含量过低,容易引起球团矿还原膨胀率高等问题,而且放置时间较长的秘鲁矿粉成球性能下降,影响造球和生球质量。通过试验,研究了秘鲁矿粉的造球性能,以及地方矿粉和含镁熔剂对秘鲁矿粉球团造球、焙烧及成品球质量的影响。试验结果显示,采取高压辊磨、配加地方矿粉或含镁熔剂等措施可以改善秘鲁矿粉的成球性能和生球质量。秘鲁矿粉配加SiO2含量较高的地方矿粉或添加蛇纹石、橄榄石等含镁熔剂,能有效控制球团矿的还原膨胀率。
Peruvian magnetite powder with fine grain size, high grade, low gangue content, but its alkali content is relatively high, and the SiO2 content is too low, easily lead to the pellet reduction and expansion rate higher, and placed a longer time Peru mineral powder into the ball performance decline, affecting pelletizing and ball quality. Through experiments, the pelletizing properties of Peruvian ore powder and the influence of local ore powder and magnesia flux on the pelletizing, roasting and finished ball quality of Peruvian ore pellets were studied. The test results show that the high pressure roller mill with local ore powder or magnesia flux can improve the balling performance and ball quality of Peruvian ore powder. Peru mineral powder with high content of SiO2 slag or add serpentine, olivine and other magnesium flux, can effectively control the reduction of pellets swelling.