Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 26    No. 12    December 2016

[PDF Download]        [Flash Online]

    

Reductive kinetics of Panzhihua ilmenite with hydrogen
Chang-yuan LU1,2,3, Xing-li ZOU1,2,3, Xiong-gang LU1,2,3, Xue-liang XIE1,2,3, Kai ZHENG1,2,3, Wei XIAO4, Hong-wei CHENG1,2,3, Guang-shi LI1,2,3

1. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
2. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China;
3. Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai 200072, China;
4. Shanghai Shanshan Tech. Co., Ltd., Shanghai 201209, China

Abstract:The hydrogen reduction of Panzhihua ilmenite concentrate in the temperature range of 900-1050 °C was systematically investigated by thermogravimetric analysis (TG), X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. It was shown that the products of the Panzhihua ilmenite reduced at 900 °C were metallic iron and rutile. Above 1000 °C, ferrous pseudobrookite solid solution was generated. During the reduction process, element Mg gradually concentrated to form Mg-rich zone which can influence the metallization process. The reduction reaction proceeded topochemically and its related reduction kinetics were also discussed. The kinetics of the reduction indicated that the rate-controlling step was the diffusion process. The apparent activation energy of the hydrogen reduction of Panzhihua ilmenite was calculated to be 117.56 kJ/mol, which was larger than that of synthetic ilmenite under the same reduction condition.

 

Key words: Panzhihua ilmenite; synthetic ilmenite; hydrogen reduction; kinetics; rate-controlling step; magnesium migration

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com