镁尖晶石砖在RH真空处理的应用及对钢水增铬的影响  

Application of magnesia spinel bricks in RH vacuum treatment and its effect on chromium increase in molten steel

作　　者：曹一 孔勇江 饶江平 刘黎 付刚强 徐志华[1] CAO Yi;KONG Yongjiang;RAO Jiangping;LIU Li;FU Gangqiang;XU Zhihua(Wugang Refractory Co.,Ltd.,Wuhan 430083,China;Steelmaking Plant,Wuhan Iron and Steel Co.,Ltd.,Wuhan 430081,China;Baosteel Central Research Institute(R&D Center of Wuhan Iron&Steel Co.,Ltd.),Wuhan 430080,China)

机构地区：[1]武钢耐火材料有限责任公司,湖北武汉430083 [2]武汉钢铁有限公司炼钢厂,湖北武汉430081 [3]宝钢股份中央研究院(武钢有限技术中心),湖北武汉430080

出　　处：《炼钢》2024年第1期47-51,共5页Steelmaking

摘　　要：针对武汉钢铁有限公司炼钢厂RH真空处理装置使用镁铬砖存在的铬污染及钢水增铬问题,以大结晶电熔镁砂、铝镁尖晶石、金属铝粉和硅粉为原料,以热固性酚醛树脂为结合剂,制备了RH真空用镁尖晶石砖,在该炼钢厂进行了工业应用试验,三炼钢分厂RH真空插入管平均使用寿命130次,底部槽平均使用寿命384次,使用寿命与镁铬砖相当。四炼钢分厂RH真空插入管平均使用寿命97.17次;底部槽平均使用寿命194.28次;冶炼电工钢条件下寿命有所降低。镁尖晶石砖与镁铬砖相比增Cr质量分数平均降幅64.49%,利于降低钢水中的Cr含量。In response to the issue of chromium pollution and the increase of chromium content in molten steel caused by the use of magnesia-chrome bricks in the RH vacuum treatment facility of Steelmaking Plant,Wuhan Iron and Steel Co.,Ltd.,magnesia spinel bricks for RH were prepared using large crystalline fused magnesia,aluminum magnesium spinel,aluminum powder,silicon powder,and thermosetting phenolic resin as a binder.Industrial application tests were conducted at Steelmaking Plant,Wuhan Iron and Steel Co.,Ltd.The average service life of the RH snorkel was 130 cycles in No.3 Steelmaking Plant,and the average service life of the bottom tank was 384 cycles,which were comparable to that of magnesia-chrome bricks.In No.4 Steelmaking Plant,the average service life of the RH snorkel was 97.17 times,and the average service life of the bottom tank was 194.28 times,with a decrease in service life under the condition of oriented silicon steel production.Compared to magnesia-chrome bricks,the average increase in Cr mass fraction by magnesia spinel bricks was reduced by 64.49%,which is beneficial for reducing the Cr content in molten steel.

关 键 词：RH真空 无铬化 镁尖晶石砖 炼钢 精炼 增铬 

分 类 号：TF769.4[冶金工程—钢铁冶金]