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以纯试剂为原料采用固相合成法,用等摩尔比的Fe_2O_3和MgO,在1280℃、于空气气氛下烧结合成铁酸镁,研究了铁酸镁压团在拟定还原制度下对赤铁矿还原各阶段还原产物的影响。研究表明:在Fe_2O_3还原到Fe_3O_4阶段,形成了铁酸镁晶格结构类型的固溶体,稳定了铁酸镁晶格;在Fe_2O_3还原到FexO阶段,形成大量的镁质浮氏体,而残留的铁酸镁中,铁以不同化合价存在于其中;在Fe_2O_3还原到Fe阶段,铁酸镁被分解为两相,分别是金属铁和氧化镁,且对产物铁的晶格结构无影响。最终探明了铁酸镁在Fe_2O_3压团还原过程中的行为规律。
Pure reagent was used as raw material to synthesize magnesium ferrite with equimolar ratio of Fe 2 O 3 and MgO at 1280 ℃ under air atmosphere by solid phase synthesis method. The reduction of hematite with ferrite compaction under the proposed reduction was studied The effect of reduction products at each stage. The results show that a solid solution of lattice structure type of ferrite is formed during the reduction of Fe 2 O 3 to Fe 3 O 4, and the lattice of ferrite is stabilized. During the reduction of Fe 2 O 3 to FexO, a large amount of magnesian bauxite is formed, while the residual iron In magnesium acid, iron exists in different valences. During the reduction of Fe 2 O 3 to Fe, the magnesium ferrite is decomposed into two phases, namely, metallic iron and magnesium oxide, respectively, and has no effect on the lattice structure of the product iron. Finally, the behavior of magnesium ferrite during the reduction of Fe_2O_3 was investigated.