期刊
METALS
卷 9, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/met9010015
关键词
high-aluminum iron ore; synergistic reduction; high-manganese iron ore; hercynite; fayalite
资金
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources [2017zy002, 2017zy012]
- Wuhan University of Science and Technology [2017xz013]
- National Natural Science Foundation of China [51574281]
How to utilize low grade complex iron resources is an issue that has attracted much attention due to the continuous and huge consumption of iron ores in China. High-aluminum iron ore is a refractory resource and is difficult to upgrade by separating iron and alumina. An innovative technology involving synergistic reducing and synergistic smelting a high-aluminum iron ore containing 41.92% Fe-total, 13.74% Al2O2, and 13.96% SiO2 with a high-manganese iron ore assaying 9.24% Mn-total is proposed. The synergistic reduction process is presented and its enhancing mechanism is discussed. The results show that the generation of hercynite (FeAl2O4) and fayalite (Fe2SiO4) leads to a low metallization degree of 66.49% of the high-aluminum iron ore. Over 90% of the metallization degree is obtained by synergistic reducing with 60% of the high-manganese iron ore. The mechanism of synergistic reduction can be described as follows: MnO from the high-manganese ore chemically combines with Fe2SiO4 and FeAl2O4 to generate Mn2SiO4, MnAl2O4 and FeO, resulting in higher activity of FeO, which can be reduced to Fe in a CO atmosphere. The main products of the synergistic reduction process consist of Fe, Mn2SiO4, and MnAl2O4.
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