连铸中间包涂料组成及性能对钢水增氢的影响分析  

Influence of composition and properties of con-casting tundish coating on hydrogen pick-up of molten steel

作　　者：徐国涛 刘孟 吴杰 张彦文 张洪雷 Xu Guotao;Liu Meng;Wu Jie;Zhang Yanwen;Zhang Honglei(Wuhan Branch of Baosteel Research Institute(R&D Center of Wuhan Iron&Steel Co.,Ltd.),Wuhan 430080,Hubei,China;不详)

机构地区：[1]宝钢股份中央研究院,湖北武汉430080 [2]武钢有限技术中心,湖北武汉430080

出　　处：《耐火材料》2020年第4期361-364,共4页Refractories

摘　　要：对用于生产钢轨的连铸中间包材料的组成、性能及烘烤工艺进行了分析,结果表明:镁橄榄石质涂料因为含蛇纹石矿物相,导致在300~1050℃时其质量损失率较高,质量损失的速率较大,尤其是在蛇纹石的相变过程中变化较大。镁质涂料经1150℃处理后的结构仍然是多孔、未致密烧结的结构,其工作层中骨料和基质在冷态下都存在吸潮问题。如果中间包不是烘烤后热态投入使用,会存在返潮;冷包使用也会因水分去除不完全导致钢水增氢。因此,控制中间包的原材料组成,避免采用含羟基蛇纹石原料,提高烘烤温度,保证烘烤时间,避免冷包投用是减少钢水增氢的关键。The composition,the properties and the baking technology of refractories for con-casting tundish for producing rail were analyzed.The results show that:at 300-1050℃,the forsterite coating has large mass loss rate since it contains serpentine mineral phases,especially during the phase transition of serpentine.The coating after treatment at 1150℃is still porous and not densely sintered,so the moisture absorption problem exists in both aggregates and matrix in the working layer.If the tundish is not used in hot state after baking,there will be moisture absorption;using a cold tundish will lead to hydrogenation of molten steel due to incomplete water removal.Therefore,the keys to reduce the hydrogenation of molten steel are controlling the raw material composition of the tundish,avoiding the use of raw material containing hydroxy serpentine,increasing the baking temperature,ensuring the baking time and avoiding the use of cold tundish.

关 键 词：连铸 中间包 耐火材料 钢 增氢 

分 类 号：TQ175.73[化学工程—硅酸盐工业]