Abstract: To reduce the pollution of taphole clay and develop environment-friendly taphole clay,Al₂O₃-SiC-C waterless taphole clay was prepared using brown corundum,SiC,coke,sericite,kyanite,clay,and Si₃N₄-Fe powder as the main raw materials,NS-FH as the composite sintering aid,and environmentally friendly polyhydroxy saccharides glucose and sucrose as the binders.The effect of the extra addition of glucose or sucrose solution (0,8%,9%,10%,11%,12% and 13%,by mass) on the properties of Al₂O₃-SiC-C waterless taphole clay was studied.The results show that the Al₂O₃-SiC-C waterless taphole clay with good comprehensive properties can be prepared using polyhydroxy saccharides glucose or sucrose as the binder;when the addition of sucrose solution is 12%,the performance of the waterless taphole clay is the best,the Marshall value is 1.14 MPa,and the sample fired at 1 350 ℃ in an atmosphere with carbon embedded has the linear shrinkage rate of 0.72%,bulk density of 2.41 g·cm^-3,apparent porosity of 24.4%,cold compressive strength of 40.1 MPa and hot modulus of rupture (embedded in carbon at 1 400 ℃ for 30 min) of 12.1 MPa.

Key words: polyhydroxy saccharide binders, Al₂O₃-SiC-C waterless taphole clay, Marshall value, mechanical properties, microstructure

摘要： 为减少炮泥的污染,开发环境友好型炮泥,采用棕刚玉、SiC、焦炭、绢云母、蓝晶石、黏土、Si₃N₄-Fe粉等为主要原料,NS-FH为复合烧结助剂,分别以环保无污染的多羟基糖类葡萄糖和蔗糖为结合剂,制备Al₂O₃-SiC-C质无水炮泥。研究了葡萄糖或蔗糖溶液的外加量(加入质量分数分别为0、8%、9%、10%、11%、12%、13%)对该炮泥性能的影响。结果表明:以多羟基糖类葡萄糖或蔗糖为结合剂,可制得综合性能较好的Al₂O₃-SiC-C质无水炮泥;外加12%(w)的蔗糖溶液时,无水炮泥的性能最佳,其马夏值为 1.14 MPa,1 350 ℃埋石墨烧后的线收缩率、体积密度和显气孔率分别为0.72%、2.41 g·cm^-3和24.4%,常温耐压强度和高温抗折强度(1 400 ℃埋碳并保温30 min)分别为40.1和12.1 MPa。

关键词: 多羟基糖类结合剂, Al₂O₃-SiC-C质无水炮泥, 马夏值, 力学性能, 显微结构