中间包Al_(2)O_(3)-MgO-Cr_(2)O_(3)质挡墙的研制与应用  

Development and Application of Al_(2)O_(3)-MgO-Cr_(2)O_(3) Slag Wall Castables for Tundish

作　　者：陈永强 张连进 王文学 Chen Yongqiang;Zhang Lianjin;Wang Wenxue(Tangshan High Temperature Materials Co.,Ltd.,Tangshan Hebei 063021,China;Hebei Guoliang New Materials Co.,Ltd.,Tangshan Hebei 063021,China)

机构地区：[1]唐山贝斯特高温材料有限公司,河北唐山063021 [2]河北国亮新材料有限公司,河北唐山063021

出　　处：《山西冶金》2024年第9期67-69,72,共4页Shanxi Metallurgy

摘　　要：以烧结镁砂、电熔镁砂、高铝矾土、棕刚玉、板状刚玉、活性氧化铝微粉、二氧化硅微粉、氧化铬绿微粉为主要原料,外加高效减水剂制备中间包挡墙浇注料,并将其与原有浇注料进行对比试验。结果表明:在110℃保温24 h、1 200℃保温3 h和1 500℃保温3 h这3种处理条件下,新研制的Al_(2)O_(3)-MgO-Cr_(2)O_(3)质浇注料除常温强度略低外,烧后强度和高温抗折强度都明显高于同一条件下的对比浇注料;新研制的浇注料热震稳定性和抗渣性均明显好于原用镁质浇注料;采用新研制的Al_(2)O_(3)-MgO-Cr_(2)O_(3)质浇注料制作中间包挡墙,并在板坯中间包上试用,使用寿命明显提升,取得了预期的效果。Experiments of Al_(2)O_(3)-MgO-Cr_(2)O_(3)slag wall castables for tundish were developed to compare the property difference between other two samples,using sintered magnesia,fused magnesia,bauxite,brown fused corundum,sintered alumina,ultrafine active alumina,silica fume and chromium oxide powders as raw materials,plus high-range water reducing admixture.The results indicated that the fired strength(1 200℃and 1 500℃) of the new castables is all above others,except of 110℃situation.The thermal shock resistance and slag resistance of Al_(2)O_(3)-MgO-Cr_(2)O_(3)castables are better.On the basis of previous tests,Al_(2)O_(3)-MgO-Cr_(2)O_(3)slag wall were produced and carried out application.The using effect in practice was satisfying and up to the expectation.

关 键 词：中间包 挡墙 浇注料 Al_(2)O_(3)-MgO-Cr_(2)O_(3) 

分 类 号：TF777[冶金工程—钢铁冶金]