添加物对LF炉用镁钙碳砖性能的影响  

Effect of the Additives on the Properties of MgO-CaO-C Brick

作　　者：赵玉玺[1] 赵慧生[2] 侯文兵 

机构地区：[1]太原钢铁集团有限公司耐火材料公司,山西太原030003 [2]太原钢铁集团有限公司技术处,山西太原030003

出　　处：《山西建材》2000年第2期7-9,共3页

摘　　要：分析了Al、Si添加物不能增强镁钙碳砖并使碳化后制品膨胀的原因。试验结果显示 :Al和Si在高温下氧化成Al2 O3 和SiO2 ,继而再与CaO反应 ,生成C3 A和C2 S ,再加上C2 S的晶型转变 ,这一系列反应一方面使Al3 C4 和SiC的生成量减少 ,另一方面产生很大的体积膨胀效应 ,导致产品结构破坏。因此 ,与镁碳砖不同 。In The paper the cause is analyzed why the metal additives, Aluminium and Silicon, can not enforce the MgO-CaO-C brick and why they make the coked product expand. It is indicated by the experiment that under high temperature, aluminium and silicon are oxidated into Al 2O 3 and SiO 2 and then reacted with CaO to form C 3A and dicalcium silicate, and then α-C 2S→β-C 2S. These series of reactions reduce the production of Al 3C 4 and SiC, and, on the other hand, lead to the considerable expansion of volume, so that the structure of the product is changed greatly. Therefore, unlike magnesia-carbon brick, the metal Aluminium and silicon do not strengthen the MgO-CaO-C brick.

关 键 词：添加剂 镁钙碳砖 性能 影响 

分 类 号：TQ175.7[化学工程—硅酸盐工业]