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本文借助于光学显微镜、电子扫描显微镜等研究方法及烧结杯解剖等试验手段,研究了攀钢烧结矿的固结机理及钛在烧结过程中的行为。研究表明,攀枝花含钛铁精矿在烧结过程中首先生成铁酸钙,之后随温度升高铁酸钙和硅质物料反应生成硅酸盐熔体。最后成品矿由玻璃相,铁酸钙固结,钛赤铁矿的连晶也起一定的固结作用。烧结前92.42%的 TiO_2固溶于钛磁铁矿中,烧结后 TiO_2则赋存于钙钛矿,钛磁铁矿和钛赤铁矿中。随着烧结矿中 TiO_2含量增加,钙钛矿增加,铁酸钙减少。人工合成了块状钙钛矿,它的抗压强度只有83.3N/mm~2。烧结过程中,钙钛矿主要在1200℃以上从熔体中析出。在现有原料条件下,减少钙钛矿的有效措施是采用低温氧化气氛烧结。
In this paper, by means of light microscope, scanning electron microscope and other research methods and experimental methods such as sintering cup anatomy, the solidification mechanism of sintered ore and the behavior of titanium during sintering are studied. The research shows that the iron-containing concentrate of FeTi containing titanium in Panzhihua firstly produced calcium ferrite during the sintering process and then reacted with silicate material to produce silicate melt with the increase of temperature. The final product ore by the glass phase, calcium ferrite solidification, titanium hematite crystal also play a role in consolidation. 92.42% of the TiO 2 solid solution before sintering in the titanium magnetite, sintered in the presence of TiO 2 perovskite, titanium magnetite and titanium hematite. With the increase of the content of TiO_2 in sinter, the perovskite increases and the calcium ferrite decreases. Artificially synthesized massive perovskite, its compressive strength is only 83.3N / mm ~ 2. During sintering, perovskites are mainly precipitated from the melt above 1200 ° C. Under the existing raw material conditions, reducing the perovskite effective measures is the use of low-temperature oxidation sintering atmosphere.