电熔镁锆砂加入量对RH精炼炉用刚玉-尖晶石浇注料性能的影响  

Influence of fused MgO-ZrO_2 addition on properties of corundum-spinel castables for RH degassers

作　　者：朱新伟[1] 邱文冬 梁永和[1] 赵伟 岳鹏[1] 聂建华[1] 崔任渠[1] 

机构地区：[1]武汉科技大学高温陶瓷与耐火材料湖北省重点实验室培育基地,湖北武汉430081 [2]上海宝钢工业技术服务有限公司,上海201902

出　　处：《耐火材料》2013年第3期190-193,共4页Refractories

摘　　要：采用粒度为5～3 mm的电熔致密刚玉,3～1、≤1、≤0.074 mm的电熔白刚玉,1～0.044 mm的电熔富铝尖晶石等为主要原料,纯铝酸钙水泥、活性α-Al2O3微粉为结合剂,同时添加适量的微粉和高效复合减水剂,研究了电熔镁锆砂加入量(w)分别为0、2%、4%、6%、8%时对RH精炼炉用刚玉-尖晶石浇注料110、1 100和1 500℃处理后的抗折强度、耐压强度、线变化率,以及1 500℃处理后的耐磨性和1 600℃处理后的抗渣性能的影响。结果表明:1)加入2%(w)的电熔镁锆砂能明显提高浇注料的强度和耐磨性;2)随着镁锆砂含量的增加,线膨胀率明显增大,但电熔镁锆砂加入量为2%～4%(w)的浇注料体积稳定较好;3)加入电熔镁锆砂可以明显提高浇注料的抗渣渗透性,电熔镁锆砂加入量为2%(w)时,试样的抗渣渗透性最好。Corundum-spinel castables for RH degassers were prepared using main starting materials of fused dense corundum （5-3 mm） ,white fused corundum （3-1、≤1、≤0.074mm） and fused alumina- rich spinel （1-0. 044 mm）, binders of pure calcium aluminate cement and active cc-AI203 micropowder, adding a proper amount of micropowder and high efficient compound water reducing agent. The influences of fused MgO-ZrO2 additions （0,2 % ,4% ,6%, and 8 %, in mass） on modulus of rupture, crushing strength, permanent change in dimensions of the corundum-spinel castables fired at 110,1 100 and 1 500 ℃ for RH degassers were researched. Wear resistance of the castables treated at 1 500℃ and slag resistance of the castables treated at 1 600 ℃ were researched. The results show： （1）adding 2% fused MgO-ZrO2 can sig- nificantly improve the strength and wear resistance of the castables;（2）as MgO-ZrO2 addition increases, permanent change in dimensions increases obviously; but the castables volume is relatively stable when MgO-ZrO2 addition ranges from 2% to 4%;（3）fused MgO-ZrO2 can significantly improve the slag pene- tration resistance;the castables gain the best slag penetration resistance with 2% MgO-ZrO2.

关 键 词：电熔镁锆砂 RH精炼炉 刚玉-尖晶石浇注料 耐磨性 抗渣渗透性 

分 类 号：TQ175.73[化学工程—硅酸盐工业]