Multiple gaseous reduction of ilmenite: thermodynamic and experimental study  

作　　者：Wei Xiao Xiong-Gang Lu Xing-Li Zou Chong-He Li Wei-Zhong Ding 

机构地区：[1]Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University

出　　处：《Rare Metals》2015年第12期888-894,共7页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51074105);China National Funds for Distinguished Young Scientists(No.51225401)

摘　　要：In this paper, the thermodynamics of the reduction of ilmenite using multiple gases (H₂/CO) was calculated. It is found that the metallization rate of 20.1%–98.8%, H₂ consumption rate of 43.0%–99.1%, and carbon deposition amount of 5.7×10^?7?0.49mol can be obtained based on the conditions of hydrogen volume fraction of 10%–90% and temperature of 450–1200°C. Experimental study was also carried out using synthetic ilmenite as initial materials and reduced in a static bed reactor at 1100°C. The metallization rate reaches 97% when the multiple gas (70% H₂/10% CO/20% Ar) flow rate is 120ml·min^?1. A thermogravimetric analyzer was used to measure the variation of sample weight caused by the deposition of solid carbon. The amount of carbon deposited during experiments reaches its maximum while the original hydrogen volume content is 20%. The experimental results are well consistent with the thermodynamic analysis.In this paper, the thermodynamics of the reduction of ilmenite using multiple gases (H₂/CO) was calculated. It is found that the metallization rate of 20.1%–98.8%, H₂ consumption rate of 43.0%–99.1%, and carbon deposition amount of 5.7×10^?7?0.49mol can be obtained based on the conditions of hydrogen volume fraction of 10%–90% and temperature of 450–1200°C. Experimental study was also carried out using synthetic ilmenite as initial materials and reduced in a static bed reactor at 1100°C. The metallization rate reaches 97% when the multiple gas (70% H₂/10% CO/20% Ar) flow rate is 120ml·min^?1. A thermogravimetric analyzer was used to measure the variation of sample weight caused by the deposition of solid carbon. The amount of carbon deposited during experiments reaches its maximum while the original hydrogen volume content is 20%. The experimental results are well consistent with the thermodynamic analysis.

关 键 词：Multiple gases HYDROGEN Thermodynamic analysis Direct reduction 

分 类 号：TF55[冶金工程—钢铁冶金]