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本文主要对攀枝花钒钛磁铁矿钠化氧化球团回转炉还原过程中物质成分的演变进行了研究。球团入回转炉还原过程可分为四个阶段:第一阶段(950—1040℃)为磁铁矿-钛铁晶石固溶体,即高铁钛铁晶石阶段;第二阶段(1040—1100℃)为浮士体(FeO)-高铁钛铁晶石矿物组合阶段;第三阶段(1100℃)为金属铁-钛铁晶石矿物组合阶段,第四阶段(产品球团,1200℃)为金属铁-黑钛石矿物组合阶段。而铁、钛、镁和钠等元素演变的规律是:铁元素在氧化球团中主要集中在赤铁矿中,少部分集中在铁板钛矿中。入回转炉后,在第一阶段主要集中在高铁钛铁晶石中;还原到第二阶段时铁元素主要集中在浮士体和高铁钛铁晶石中;还原到第三阶段铁元素主要集中在金属铁中,其次分布在钛铁晶石中;还原到第四阶段铁元素主要集中在金属铁中。钛、镁和钠等元素从第二阶段开始逐渐集中到钛矿物中,一直到第四阶段或产品球团钛、镁等元素几乎全部集中到黑钛石中,而钠只有部分集中到黑钛石中。全部硅、镁和部分钙、镁、钠等元素从始至终都集中在硅酸盐玻璃中。
In this paper, the evolution of material composition in the process of reduction of Panzhihua vanadium titanomagnetite sodium oxide pellet rotary kiln was studied. Pellet into the converter reduction process can be divided into four stages: the first phase (950-1040 ℃) for the magnetite - ilmenite solid solution, that is, high-iron ilmenite stage; the second stage (1040-1100 ℃ ) For the FeO-Fe-Fe-Ti-Fe spinel assemblage phase; the third stage (1100 ° C) is the metallic iron-ilmenite-mineral assemblage stage and the fourth stage (product pellet, 1200 ° C) Iron - black titanium mineral combination phase. The iron, titanium, magnesium and sodium and other elements of the evolution of the law is: iron oxide pellets are mainly concentrated in hematite, a small part of the concentration in the iron-titanium ore. Into the converter, the first phase mainly concentrated in the high-iron ferro-ilium; to restore the second phase when the iron elements are mainly concentrated in the high-speed ferro-ilmenite ferro-iron and iron; to the third phase of the main focus of iron In the metal iron, followed by the distribution of ilmenite; reduction to the fourth stage of iron is mainly concentrated in the metal iron. Titanium, magnesium and sodium and other elements from the second phase began to gradually concentrate into titanium minerals, until the fourth stage or product pellets titanium, magnesium and other elements are almost all concentrated in black titanium stone, and sodium is only partially concentrated in black titanium Stone. All silicon, magnesium and some calcium, magnesium, sodium and other elements are concentrated in the silicate glass.