Self-repairing of MgO-C Refractory during High Temperature Oxidation
With the aim to achieve self-repairing of MgO–C refractory during high temperature oxidation,iron powder,as a new antioxidant,was introduced into this refractory.The effect of Fe addition on microstructure evolution and properties of MgO–C refractory was investigated.Based on the results,the coexistence of periclase,Fe and MgAl2O4 was identified in the presence of graphite at high temperatures.Compared to the traditional MgO–C refractory,the densification and bonding degree of Fe-containing refractory after oxidation were greatly improved by the formation of Mg(Fe1.2Al0.8)O4 bridges and MgOss.This change of microstructure caused a dramatic decrease in the effective diffusion coefficient,which contributed the most to the improvement of the oxidation resistance.The maintenance of strength against oxidation time was another important finding for this refractory.
MgO-C refractory Fe Oxidation behavior Bridging effect Microstructure
XU Lei GAO Song CHEN Min WANG Nan
School of Metallurgy,Northeastern University,Shenyang 110819,China;The State Key Laboratory of Refra School of Metallurgy,Northeastern University,Shenyang 110819,China
国际会议
Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)
杭州
英文
1-4
2018-10-17（万方平台首次上网日期，不代表论文的发表时间）