Heat balance analysis for rust reaction process of reduced ilmenite

被引：0
|
作者：
Zhao Q. [1 ,2 ]
Li M. [1 ,2 ]
Zhou L. [1 ,2 ]
Zhang T. [1 ,2 ]
机构：
[1] Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, Shenyang
[2] School of Metallurgy, Northeastern University, Shenyang
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 02期
基金：
中国国家自然科学基金;
关键词：
heat balance; reduced ilmenite; rust; rutile;
D O I：
10.11817/j.issn.1672-7207.2023.02.002
中图分类号：
学科分类号：
摘要：
To solve the problems of solw corrosion reaction of reduced ilmenite and the low efficiency, the heat balance in the corrosion reaction process of reduced ilmenite and its influence on the temperature change of the reaction system were studied. Combined with the balance calculation results, the influence of reaction temperature on the corrosion rate was investigated by analyzing the change of metal iron mass fraction in the corrosion process. The results show that theoretically, the heat released by the corrosion reaction will increase the temperature of the system. If the reaction time is shortened to 4.5 h, the temperature of the corrosion system will exceed 90 ℃. When the corrosion system is 1.5% hydrochloric acid, the liquid-solid ratio is 2∶1 (mass ratio), and the oxygen flow is 0.6 m3/h, the temperature of the reaction system is close to 85 ℃. At the same time, the change trend of the residual mass fraction of metallic iron in the corrosion product is consistent with the change of the system temperature. Temperature has a great influence on the corrosion reaction rate. When the reaction temperature is lower than 70 ℃, the corrosion rate accelerates with the increase of temperature. When the reaction temperature is 90 ℃, the oxygen solubility decreases, and the corrosion rate also decreases. © 2023 Central South University of Technology. All rights reserved.
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页码：415 / 421
页数：6
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