为改善转炉修补料对环境和工人身体造成的危害,以镁砂骨料(5～3、3～1和≤1 mm)和细粉(≤0.088mm)、SiO2微粉、SiC(≤1 mm)、α-Al2O3微粉、球状SiO2聚苯乙烯空心球为原料,制备了环保型水结合镁质修补料,并研究了SiC加入量(质量分数,分别为0、1％、2％、3％和4％)、球状SiO2外加量(质量分数,分别为0.04％、0.08％、0.16％、0.24％)、聚苯乙烯空心球外加量(质量分数,分别为0.05％、0.1％、0.2％和0.3％)对该修补料常温和高温(1000℃)流动性的影响.结果表明:(1)SiC加入量(w)从0至1％时,修补料的常温与高温流动性基本不变,加入量继续增加,则流动性明显降低.(2)随着球状SiO2外加量的增加,修补料的常温和高温流动性均先增加后降低,当其外加量(w)分别为0.08％和0.24％时,修补料的常温和高温流动性最好.(3)随着聚苯乙烯空心球外加量的增加,修补料常温流动值先增大到一定值后保持不变,高温流动性先增加后降低,当外加量(w)为0.2％时,高温流动性最好.%The water bonded magnesia-based repairing materials were prepared using magnesia aggre-gates(5-3,3-1 and ≤1 mm) and fines(≤0.088 mm),SiO2 micropowder,SiC( ≤1 mm),α-AI2O3 mi-cropowder,spherical SiO2 and bubble polystyrene as starting materials to reduce the harm of repairing materials for converter to environment and workers. Effects of SiC additions (0,1%,2%,3% and 4%, in mass) .spherical SiO2 extra additions (0.04% ,0.08% ,0.16% and 0.24% , in mass), bubble polystyrene extra additions(0,0.05% ,0.1% ,0.2% and 0. 3% ,in mass) on flowabilities at room temperature and high temperature(l 000 ℃) were researched. The results show that; (1)when SiC addition increases from 0 to 1% ,the flowabilities at room temperature and 1 000 ℃ don't change,with SiC addition further increasing, they both obviously decrease;(2)with spherical SiO2 extra addition increasing,the flowabilities at room and 1 000 ℃ firstly increase and then decrease,the repairing materials perform the best flowability with 0.08% spherical SiO2 at room temperature and 0.24% spherical SiO2 at 1 000 ℃;(3)with bubble polystyrene extra addition increasing,the flowability at room temperature firstly increases to a certain degree and then maintains, but the flowability at 1 000 ℃ firstly increases and then decreases;when the bubble polystyrene extra addition is 0.2% ,the high temperature flowability is the best.
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