Abstract: The corundum-mullite bricks were prepared using brown corundum,α-Al₂O₃ powder,andalusite powder,and Guangxi white mud as raw materials.In order to improve the iron slag erosion and corrosion resistance of corundum-mullite bricks,2 mass% Si powder was introduced into the corundum-mullite bricks,and the properties of the samples were compared before and after Si powder addition.The results show that compared with the corundum-mullite sample without Si powder,the sample with Si powder has uniform and small pores,and the apparent porosity decreases from 15.8% to 13.5%,the cold compressive strength increases obviously,the hot modulus of rupture increases by 5.6 times,the hot toughness and the iron slag corrosion resistance and the penetration resistance are obviously improved.

Key words: blast furnace, silicon powder, corundum-mullite brick, iron slag corrosion resistance, hot modulus of rupture

摘要： 以棕刚玉、α-Al₂O₃粉、红柱石粉、广西白泥等为原料制备了刚玉-莫来石砖。为了提高刚玉-莫来石砖的抗渣铁侵蚀和冲刷,引入2%(w)的Si粉,对比分析了Si粉引入前后试样的性能。结果表明,与未引入Si粉的刚玉-莫来石试样相比,引入Si粉的试样气孔均匀细小,显气孔率从15.8%降至13.5%,常温耐压强度明显提高,高温抗折强度提高了5.6倍,高温韧性与抗渣铁侵蚀、渗透性明显改善。

关键词: 高炉, Si粉, 刚玉-莫来石砖, 抗渣铁侵蚀性, 高温抗折强度