TY - JOUR
T1 - Corrosion Behavior of MgO-C Ladle Refractory by Molten Slag
AU - Zhao, Qing
AU - Zheng, Xiang
AU - Liu, Chengjun
AU - Jiang, Maofa
AU - Saxén, Henrik
AU - Zevenhoven, Ron
N1 - post-print, 12 månader, Publisher's rights
Har mailat Ron & Henrik [1.11.2021 LN]
PY - 2021/4
Y1 - 2021/4
N2 - The damage of ladle refractory, which mainly occurs at the position of the slag line, results in an increasing need of maintenance and repair and can, in the worst case, lead to a breakout of melts causing potential risks for the personnel and damage of equipment. On the basis of this fact, the corrosion behavior of MgO–C refractory in contact with molten slag during the steel refining process is experimentally studied in this work. Rotating and static dipping tests of MgO–C refractory in CaO–SiO2–Al2O3–MgO–FeO slags are conducted, and the effects of composition of slag, carbon in refractory, and rotation speed on the corrosion behavior are investigated. Results show that the corrosion depth of the MgO–C refractory increases with FeO content of slag and rotation speed of MgO–C rod, whereas it decreases with an increase in slag basicity. Slag notably penetrates the surface layer of MgO–C refractory after the carbon is oxidized, causing an aggravation of the corrosion. Moreover, the corrosion mechanism of MgO–C refractory in molten slag during the refining process is studied and illustrated in this work.
AB - The damage of ladle refractory, which mainly occurs at the position of the slag line, results in an increasing need of maintenance and repair and can, in the worst case, lead to a breakout of melts causing potential risks for the personnel and damage of equipment. On the basis of this fact, the corrosion behavior of MgO–C refractory in contact with molten slag during the steel refining process is experimentally studied in this work. Rotating and static dipping tests of MgO–C refractory in CaO–SiO2–Al2O3–MgO–FeO slags are conducted, and the effects of composition of slag, carbon in refractory, and rotation speed on the corrosion behavior are investigated. Results show that the corrosion depth of the MgO–C refractory increases with FeO content of slag and rotation speed of MgO–C rod, whereas it decreases with an increase in slag basicity. Slag notably penetrates the surface layer of MgO–C refractory after the carbon is oxidized, causing an aggravation of the corrosion. Moreover, the corrosion mechanism of MgO–C refractory in molten slag during the refining process is studied and illustrated in this work.
KW - CaO–SiO2–Al2O3–MgO–FeO slag, corrosion, MgO–C refractory, molten, refining
U2 - 10.1002/srin.202000497
DO - 10.1002/srin.202000497
M3 - Article
SN - 1611-3683
VL - 92
JO - Steel Research International
JF - Steel Research International
IS - 4
M1 - 2000497
ER -