Effect of Nickel on Formation Mechanisms of Silico-ferrite of Calcium and Aluminum （SFCA）

• Published in: 钢铁研究学报：英文版 2015 (6), p.478-486
• Main Author: Xin-yu LI Bu-xin SU Lei-ge XIA Jian-liang ZHANG Hong-wei GUO
• Format: Article
• Language: English
• Subjects: SFCA; X-射线衍射分析; 无镍; 烧结实验; 铁矿石资源; 铁素体; 铁酸钙; 铝硅酸盐
• ISSN: 1006-706X; 2210-3988

Under the pressures of both the de＇crease of high-grade high quality iron ore resources and the increase of raw material costs, the iron and steel enter＇prises in China turn to adopt iron ores which contain special elements such as nickel, manganese, etc. in the sintering blend. Anaiytica｜ reagents were used for sintering experiments, and the sinters were analyzed with X-ray diffraction, s6ailning electron microscopy and mineralogical microscopy to study the effect of nickel on the silico ferrite of calcium and aluminum （SF（＇A） bonding phase formation during sinte- ring. The results indicated that SFCA was divided into nickel containing and nickel-free areas due to the presence of nickel. The increasing content of nickel would greatly reduce the content of SFCA and promote the formation of calcium aluminum silicate. A great deal of Fe2 Oa participated in the crystal transition to Fe3 O3 , reducing the a mount of Fe2O2 involved in the formation of calcium ferrite. When the blending ratio of NiO, which is used to provide the nickel in the sintering process, is less than 3 % , the calcium ferrite is in substantially interleaving cot rosion with hematite and magnetite. Both the porosity and silicate glass phase content are low, which contributes to the sintering production.