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研究以煤泥为还原剂,印尼某海滨钛磁铁矿在直接还原焙烧过程中,不同焙烧温度下矿物组成变化规律.X射线衍射和扫描电镜分析结果表明,随着焙烧温度的升高,钛磁铁矿逐渐被还原.其中铁矿物经过浮士体(FeO),最终被还原成金属铁;而钛则经过钛尖晶石最终生成钛铁矿和少部分的铁板钛矿.在整个直接还原焙烧过程中,金属铁颗粒在1100℃左右生成,然后不断长大,在1250℃时金属铁颗粒明显增多,在之后的保温过程中,金属铁颗粒不断长大,并在此过程中将金属铁从中分离出来.
In this paper, the variation of mineral composition of a beach-side titanomagnetite in Indonesia during the process of direct reduction calcination at different calcination temperatures was studied using slime as reducing agent.The results of X-ray diffraction and scanning electron microscopy showed that with the increase of calcination temperature, Magnetite is gradually reduced, in which the iron minerals pass through the flotation body (FeO), eventually reduced to metallic iron; and titanium is through the titanium spinel eventually generate ilmenite and a small part of the iron plate in the whole In the process of direct reduction calcination, metallic iron particles are generated at about 1100 ℃, and then grow up continuously. The metallic iron particles increase obviously at 1250 ℃. During the subsequent heat preservation process, the metallic iron particles grow up continuously. During this process, Metal iron separated from it.