工程科学学报.第41卷.第12期：1520-1526.2019年12月 Chinese Journal of Engineering,Vol.41,No.12:1520-1526,December 2019 D0L:10.13374/.issn2095-9389.2019.07.04.033,http://journals.ustb.edu.cn 功能化新型耐火材料的设计、制备及应用 王恩会)，陈俊红)，侯新梅四 1)北京科技大学钢铁共性技术协同创新中心.北京1000832)北京科技大学材料科学与工程学院，北京100083 ☒通信作者，E-mail:houxinmei01@126.com 摘要围绕两种新型耐火材料展开，即钢包精炼用高性能低碳镁碳耐火材料以及超低氧钢用耐火材料，初步实验表明，将 大尺寸的碳硅化铝(A山，SC,)引入到镁碳砖(MgO-C)中不仅可以提高其抗氧化能力，又能对含碳耐火材料氧化后的疏松结构 进行修复，有望成为新一代钢包精炼用高性能低碳镁碳耐火材料：CO-MgO-Al2O3(CMA)材料兼具优异的热机械和耐渣侵 性能的同时，还可以在服役过程产生低熔点精炼渣相，具备净化钢水的潜力.可以预见，上述功能化新型耐火材料有望为高 品质钢的进一步发展提供有力材料支撑 关键词耐火材料：结构设计：可控制备：高品质钢：工业应用 分类号TG142.71 Design,preparation,and application of new functional refractories WANG En-hui,CHEN Jun-hong?.HOU Xin-mei 1)Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China 2)School of Materials Science and Engineering.University of Science and Technology Beijing.Beijing 10008,China Corresponding author,E-mail:houxinmei01@126.com ABSTRACT Every significant technical advancement of the steel industry has depended on the support of refractories used as lining materials in various smelting containers.With the increasing demand for high-quality steels,the precise control of inclusions has become increasingly important.Existing technologies and equipment can effectively reduce the amount and average size of inclusions,but they cannot guarantee the complete removal of large-sized ones.In the steel-making process,refractories in close contact with molten steel are a main source of large-sized non-metallic inclusions;these can become bottlenecks,restricting improvements in steel quality.Based on this problem,the design,preparation,and application of new functional refractories become a critical focus for further development in the steel industry.These refractories are required to possess not only excellent thermo-mechanical properties(i.e.,zero or reduced contaminant for the molten steel),but also the ability to remove inclusions with a high melting point in molten steel.However,available refractories are in their primary stages depending on experience,resulting in no breakthroughs in the precise control of inclusions,and even contamination of molten steel.This study focused on two new refractory materials,namely large-sized Al SiC with controllable morphology,and Al2O3-MgO-CaO(CMA)with a ternary-layer structure.Preliminary experiments show that,with the introduction of the large-sized Al SiC4,oxidation resistance of MgO-C bricks is improved,and the loose structure resulting from the oxidation of carbon-containing materials can be repaired.CMA materials not only possess excellent thermo-mechanical properties and high slag resistance,but also can produce refining slag phases with a low melting point.This can contribute to the floating of inclusions,thus exhibiting the potential for purifying molten steel.These new,functional refractories should offer strong support for the further development of high-quality steels. 收稿日期：2019-07-04 基金项目：国家自然科学基金资助项目(51904021.51974021,51874027)：中央高校基本科研业务费资助项目(FRF.TP.19-008A1):国家优秀 青年基金资助项目(51522402)功能化新型耐火材料的设计、制备及应用 王恩会1)，陈俊红2)，侯新梅1) 苣 1) 北京科技大学钢铁共性技术协同创新中心，北京 100083    2) 北京科技大学材料科学与工程学院，北京 100083 苣通信作者，E-mail：houxinmei01@126.com 摘    要    围绕两种新型耐火材料展开，即钢包精炼用高性能低碳镁碳耐火材料以及超低氧钢用耐火材料，初步实验表明，将 大尺寸的碳硅化铝（Al4SiC4）引入到镁碳砖（MgO−C）中不仅可以提高其抗氧化能力，又能对含碳耐火材料氧化后的疏松结构 进行修复，有望成为新一代钢包精炼用高性能低碳镁碳耐火材料；CaO−MgO−Al2O3（CMA）材料兼具优异的热机械和耐渣侵 性能的同时，还可以在服役过程产生低熔点精炼渣相，具备净化钢水的潜力. 可以预见，上述功能化新型耐火材料有望为高 品质钢的进一步发展提供有力材料支撑. 关键词    耐火材料；结构设计；可控制备；高品质钢；工业应用 分类号    TG142.71 Design, preparation, and application of new functional refractories WANG En-hui1) ，CHEN Jun-hong2) ，HOU Xin-mei1) 苣 1) Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China 2) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣 Corresponding author, E-mail: houxinmei01@126.com ABSTRACT    Every significant technical advancement of the steel industry has depended on the support of refractories used as lining materials in various smelting containers. With the increasing demand for high-quality steels, the precise control of inclusions has become increasingly important. Existing technologies and equipment can effectively reduce the amount and average size of inclusions, but they cannot guarantee the complete removal of large-sized ones. In the steel-making process, refractories in close contact with molten steel are a main source of large-sized non-metallic inclusions; these can become bottlenecks, restricting improvements in steel quality. Based on this problem, the design, preparation, and application of new functional refractories become a critical focus for further development in the  steel  industry.  These  refractories  are  required  to  possess  not  only  excellent  thermo-mechanical  properties  (i.e.,  zero  or  reduced contaminant for the molten steel), but also the ability to remove inclusions with a high melting point in molten steel. However, available refractories are in their primary stages depending on experience, resulting in no breakthroughs in the precise control of inclusions, and even contamination of molten steel. This study focused on two new refractory materials, namely large-sized Al4SiC4 with controllable morphology, and Al2O3−MgO−CaO (CMA) with a ternary-layer structure. Preliminary experiments show that, with the introduction of the  large-sized  Al4SiC4 ,  oxidation  resistance  of  MgO−C  bricks  is  improved,  and  the  loose  structure  resulting  from  the  oxidation  of carbon-containing  materials  can  be  repaired.  CMA  materials  not  only  possess  excellent  thermo-mechanical  properties  and  high  slag resistance, but also can produce refining slag phases with a low melting point. This can contribute to the floating of inclusions, thus exhibiting  the  potential  for  purifying  molten  steel.  These  new,  functional  refractories  should  offer  strong  support  for  the  further development of high-quality steels. 收稿日期: 2019−07−04 基金项目: 国家自然科学基金资助项目 (51904021，51974021，51874027)；中央高校基本科研业务费资助项目（FRF-TP-19-008A1）；国家优秀 青年基金资助项目 (51522402) 工程科学学报，第 41 卷，第 12 期：1520−1526，2019 年 12 月 Chinese Journal of Engineering, Vol. 41, No. 12: 1520−1526, December 2019 DOI：10.13374/j.issn2095-9389.2019.07.04.033; http://journals.ustb.edu.cn