作者：GAO Jianying,Christoph W脰HRMEYER2,..

作者单位：1Imerys Aluminates (China),2Imerys Aluminates,3Imerys Technology Center,4Henan UST

会议录名称：Conference on Refractories International 2018

出版年：2018-10-17

起页：1

止页：1

总页数：1

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 brick,CMA,protective coating,oxidation resistance,stress concentration

内容简介

CMA refers to Calcium Magnesium Aluminates, which is porous synthetic material consisting of 70% ultrafine Al2O3-MgO spinel and 30% aluminate phases. The service life of MgO-C brick for ladle lining was improved remarkably when 5% CMA (2.5% 3-1mm and 2.5% 1-0mm) was introduced by substituting for fused MgO in same size and quantity. The used bricks after serving for 138 heats in 120t refining ladle were collected. Besides macro observation, postmortem investigation was carried out in terms of microstructural characterization with SEM and chemical composition measurement by EDS. There is a thin layer of protective slag coating on the hot surface. The used brick pieces jointed tightly together by condensed liquid phase, which is also covered on cold surface with 3-5mm in thickness.