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为查明钒钛磁铁矿球团固结机理,本文记述了攀枝花铁精矿球团固结与物相变化的实验研究,研讨了氧化反应与球团结构、高温焙烧与物相组成及石灰石添加物对球团结构的影响。实验研究表明,攀枝花精铁矿经细磨成球后,在1250℃氧化焙烧可获得质量好的球团矿;赤铁矿晶体大小不是固结的主要原因;而再结晶的重要作用却在于改变球团结构:固相反应生成稳定的钛赤铁矿及矿物的紧密堆积。攀枝花铁精矿球团固结应以氧化反应完全为前提,适当控制焙烧温度和渣相,形成以钛赤铁矿为骨架的稳定物相组成与结构。
In order to investigate the consolidation mechanism of vanadium-titanium magnetite pellets, the experimental study on the consolidation and phase transformation of the iron concentrate pellets of Panzhihua was carried out. The effects of oxidation reaction, pellet structure, calcination at high temperature, phase composition and limestone Effect of additives on pellet structure. Experimental studies have shown that, after finely grinding into fine spheres, Panzhihua fine iron ore can be oxidized and roasted at 1250 ℃ to obtain good quality pellets; the size of hematite crystal is not the main reason for consolidation; and the important role of recrystallization is to change Pellet structure: The solid phase reaction produces a stable accumulation of titanium hematite and minerals. Panzhihua iron concentrate pellets should be based on the premise of complete oxidation reaction, proper control of calcination temperature and slag phase, the formation of titanium hematite skeleton as a stable phase composition and structure.