颗粒级配对低碳镁碳砖性能的影响  

Effect of grain composition on properties of low carbon magnesia-carbon brick

作　　者：王长明[1] 何见林[2,3] 顾华志[2] 杨强[1] 李冬梅[1] 汪厚植[2] 

机构地区：[1]攀枝花钢铁(集团)公司冶金材料有限责任公司,四川攀枝花617023 [2]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [3]武汉钢铁(集团)公司耐火材料有限责任公司,湖北武汉430082

出　　处：《钢铁研究》2010年第1期4-7,共4页Research on Iron and Steel

摘　　要：以电熔镁砂、鳞片石墨为主要原料,热固性酚醛树脂为结合剂,金属Al粉为抗氧化剂,按颗粒连续密堆理论Andreassen公式计算颗粒级配,研究了3种镁砂临界粒度和粒度分布系数对低碳镁碳砖常温物理性能、热膨胀性能、抗氧化性及抗侵蚀性的影响。结果表明:选用适当的镁砂临界粒度,调整颗粒级配,可增大石墨与镁砂的比表面接触,减缓镁砂高温条件下的热膨胀应力,提高低碳镁碳砖的物理性能。Low carbon-magnesia carbon brick were prepared with fused-magnesia and flake graphite as raw materials,phenolic resin as bonding agent,aluminum metal powder as antioxidants.According to the theory of dense granules of continuous Andreassen formula,the effects of three kinds of critical particle of magnesite clinker and particle size distribution coefficient on properties of low carbon magnesia-carbon brick,including thermal expansion ratio,oxidation resistance and slag resistance,were studied.The results showed that by choosing the proper magnesia critical particle size and adjusting the particle gradation,contacting surface area between the graphite and magnesia can be increased,and the thermal expansion stress of magnesia at high temperature can be reduced,therefore the properties of low carbon magnesia-carbon brick are improved.

关 键 词：临界粒度 粒度分布系数 低碳镁碳砖 

分 类 号：TQ175.71[化学工程—硅酸盐工业]