Reduction Kinetics of a Natural Ilmenite by Graphite

摘要：

Reduction of Bama ilmenite concentrate containing 49.78 mass% TiO2 and 27.96 mass% total Fe by graphite was studied using thermogravimetric analysis system under argon gas ambient at elevated temperature. The reduction degree of Bama ilmenite enhanced with increasing temperature, the reaction rate varied with temperature and reduction time simultaneously. The phase transformation, the chemical composition, the microstructure and morphology of reduced samples were investigated by using X-ray diffraction, Scanning electron microscopy, Energy disperse spectroscopy respectively. The high impurities content of Bama ilmenite evidently bated the reduction of ilmenite. Forming the enrichment zone of manganese prevented complete reduction of Fe2+. The reduction products were mostly reduced iron, rutile, reduced rutiles, Ti3O5 and pseudobrookite solid solution. The reduction kinetics was also discussed. The results showed that the reduction temperature was a key factor to control reaction rate.

关键词： Bama ilmenite reduction thermogravimetry impurity kinetics

作者: WANG Yu-ming YUAN Zhang-fu TAN Qiang-qiang

作者单位: Institute of Ironmaking Research, Baoshan Iron & Steel Co Ltd, Shanghai 201900, China State Key Labo State Key Laboratory of Multi-phase & Complex Systems, Institute of Process Engineering, Chinese Aca

会议类型: 国际会议

会议名称: The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)

会议地点: 上海

会议语种:英文

页码: 1362-1366

在线出版日期: 2009-10-20（万方平台首次上网日期，不代表论文的发表时间）