Corrosion behavior of carbon composite brick in high alumina slags

Reaction Behavior of Coke in a High Alumina Slag

“…The diameter decrement which was the difference of the original and final diameter was used to characterize the reaction degree of the coke and slag. It should be mentioned that the experimental method and the data analysis method has been conducted by many researchers to investigate the dissolution behavior of refractories into molten slag, [14][15][16][17] and this method has a better accuracy and reproducibility.…”

“…5 that the diameter decrement of the coke increased with the rise of rotation speed. The mass transfer of the reactant at the interface between the coke and molten slag was influenced by the rotation speed, and a higher rotation speed could increase the renewal rate of reactant, 17) which could improve the mass transport kinetics, and then facilitate the slag-coke interfacial reaction. On the other hand, the strong scouring of slag under high rotation speed conditions also could accelerate the coke degradation, which increased the diameter decrement of the coke.…”

Corrosion Behavior of Alumina Containing Refractory in Blast Furnace Hearth by CaO–SiO₂–MgO–Al₂O₃–Cr₂O₃ Slags

“…In order to reflect the real flow state of molten slag in the blast furnace hearth, the corrosion experiments of the refractories in CaO-SiO 2 -MgO-Al 2 O 3 -Cr 2 O 3 (-CaF 2 ) slags were studied by using finger rotating method, which has been employed in our previous studies [10][11][12] and by many other researchers. 6,13,14) Since the detail of experimental apparatus has already been described in our previous study, 10) it was not mentioned in this paper.…”

“…In our previous papers, [10][11][12] the corrosion mechanisms of refractories, such as carbon composite brick and carbon brick, in CaO-SiO 2 -MgO-Al 2 O 3 -Cr 2 O 3 -based slag have been systematically investigated. In this work, the corrosion behavior of corundum brick by CaO-SiO 2 -MgO-Al 2 O 3 -Cr 2 O 3 slag with or without CaF 2 addition was studied.…”

“…Furthermore, the corrosion behavior of carbon composite brick in CaF 2 -containing slag was also investigated, as a comparison with previous studies. [10][11][12] The aim of this work is to advance the fundamental understanding of the corrosion mechanisms of refractories by blast furnace slags and subsequently provide a guidance to improve the quality of the refractory and prolong the service life of the blast furnace. This will be also helpful so as to increase the use of low-grade ores such as laterite ores in blast furnace.…”