Thermodynamic Activity of Chromium Oxide in CaO-SiO2-MgO-Al2O3-CrOx Melts

被引：18

作者：

Dong, Pengli ^{[1
,2
]}

Wang, Xidong ^{[3
]}

Seetharaman, Seshadri ^{[2
]}

机构：

[1] Univ Sci & Technol, Dept Phys Chem, Beijing 100083, Peoples R China

[2] Royal Inst Technol, Dept Mat Sci & Engn, Stockholm, Sweden

[3] Peking Univ, Coll Engn, Beijing 100871, Peoples R China

来源：

STEEL RESEARCH INTERNATIONAL | 2009年 / 80卷 / 03期

关键词：

equilibrium; activity; chromium oxide; steel; melts; SULFIDE CAPACITY; OXIDATION-STATE; PHASE-RELATIONS; SYSTEM; 1500-DEGREES-C; EQUILIBRIUM;

D O I：

10.2374/SRI08SP124

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Thermodynamic activities of chromium oxide contained in CaO-SiO2-MgO-Al2O3 melts were measured in the present work using gas-slag equilibrium technique. The oxygen partial pressure was varied (10(-)3, 10(-4), 10(-5) Pa). Gas mixture of CO, CO2 and Ar were used and investigated at 1803, 1873 and 1923 K. The activities of CrO showed a strong positive deviation from ideality and a decrease with increasing temperature and oxygen partial pressure. A mathematical expression relating the amount of chromium oxide in the slag phase with the activity of Cr in the metal phase based on the present experimental results is presented.

引用

页码：202 / 208

页数：7