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首页> 外文期刊>ISIJ international >Corrosion Behavior of Alumina Containing Refractory in Blast Furnace Hearth by CaO–SiO2–MgO–Al2O3–Cr2O3 Slags
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Corrosion Behavior of Alumina Containing Refractory in Blast Furnace Hearth by CaO–SiO2–MgO–Al2O3–Cr2O3 Slags

机译：CaO–SiO 2 –MgO–Al 2 O 3 –Cr 2 <对高炉炉膛含氧化铝耐火材料的腐蚀行为/ sub> O 3 炉渣

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摘要

The corrosion behaviors of corundum brick and carbon composite brick used in blast furnace hearth by CaO–SiO_(2)–MgO–Al_(2)O_(3)–Cr_(2)O_(3)(-CaF_(2)) slags were studied in the present work. The degradation of the corundum brick in slag was a result of slag infiltration and brick dissolution, and the corrosion of the brick became more serious with the addition of CaF_(2) due to the decrease of slag viscosity. The disintegration of carbon composite brick in CaF_(2)-containing slag was caused by the combination of slag penetration, brick dissolution and reaction between slag and brick. By comparing the corrosion behavior in CaF_(2)-containing slag between the corundum brick and carbon composite brick, the corrosion degree of the corundum brick was greater than that of the carbon composite brick. To the blast furnace operation in which a low grade iron ore such as laterite ore and CaF_(2) containing slag (about 2 wt%) are used, it was found that the carbon composite brick with better slag corrosion resistance can be selected as a hearth refractory so as to improve the operation performance and ensure the longer campaign life of blast furnace.
机译：CaO–SiO_（2）–MgO–Al_（2）O_（3）–Cr_（2）O_（3）（-CaF_（2））渣对高炉炉膛用刚玉砖和碳复合砖的腐蚀行为在当前工作中进行了研究。炉渣中刚玉砖的降解是炉渣渗入和砖块溶解的结果，而随着CaF_（2）的加入，由于炉渣粘度的降低，砖的腐蚀变得更加严重。碳复合砖在含CaF_（2）的炉渣中的崩解是由炉渣渗透，砖的溶解以及炉渣与砖之间的反应共同引起的。通过比较刚玉砖和碳复合砖在含CaF_（2）的炉渣中的腐蚀行为，发现刚玉砖的腐蚀程度大于碳复合砖的腐蚀程度。发现在高炉操作中使用低品位铁矿石（例如红土矿和含渣（约2 wt％）的CaF_（2））时，发现可以选择具有更好的耐渣腐蚀性能的碳复合砖作为材料。从而提高了炉膛的耐火性能，保证了高炉的使用寿命。

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