作者：XU Lei,GAO Song,CHEN Min,WANG Nan

作者单位：1Northeastern University,2Wuhan University of Science and Technology

会议录名称：Conference on Refractories International 2018

出版年：2018-10-17

起页：1

止页：4

总页数：4

馆藏号：

分类号：TQ175

语种：英文

会议名称：Conference on Refractories International 2018

会议地点：中国浙江杭州

会议时间：2018-10-17

会议主办者：中钢集团洛阳耐火材料研究院,中国金属学会耐火材料分会,耐火材料杂志社,先进耐火材料国家重点实验室

关键词：MgO–C refractory,Fe,Oxidation behavior,Bridging effect,Microstructure

内容简介

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.