加入三种SiO_2微粉的Al_2O_3-SiC-C铁沟料性能比较
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摘要
为了提高Al_2O_3-SiC-C铁沟浇注料的性能,在其配料中分别添加2%(w)粒度分布、平均粒度、比表面积、纯度和无定形度均不相同的三种SiO_2微粉(92SiO_2微粉、95SiO_2微粉和99SiO_2微粉),比较了Al_2O_3-SiC-C铁沟浇注料的流动性、显气孔率、烧后线变化、常温强度、热态强度和抗渣性等。结果表明:1)含95SiO_2微粉的浇注料流动性整体上好于含92SiO_2微粉的;含99SiO_2微粉的浇注料早期流动性较好,但随时间衰减较快。2)烘干试样的显气孔率差别较大,含92SiO_2微粉试样的最小,含99SiO_2微粉试样的最大。3)含99SiO_2微粉的试样烧后收缩或膨胀均最小,体积稳定性最好。4)含不同SiO_2微粉的试样常温抗折强度相差不大。5)含92SiO_2微粉或99SiO_2微粉的试样高温抗折强度较优。6)含92SiO_2微粉的试样抗渣性最差,含99SiO_2微粉的试样抗渣性最好。
In order to improve the properties of Al_2O_3-SiC-C castables for iron runner,three kinds of SiO_2 micropowders( w( SiO_2) is 92%,95%,and 99%) with different particle size distribution,average particle sizes,specific surface area,purities and amorphous degrees were separately added to the Al_2O_3-SiC-C castables,and the fluidity,apparent porosity,linear change rate after heat treatment,cold strength,hot strength and slag resistance of the Al_2O_3-SiC-C castables were compared. The results show that:( 1) the fluidity of the castables containing 95% SiO_2 micropowder is better than that of the castables with 92% SiO_2 micropowder; the early fluidity of the castables with 99% SiO_2 micropowder is good but declines fast with the time;( 2) the apparent porosity of the dried specimens varies much,the castables containing 92% silica micropowder have the minimum value and the castables with 99% silica micropowder have the maximum value;( 3) the specimen containing 99% silica micropowder has the minimum shrinkage or expansion rate thus the best volume stability after firing;( 4) the cold modulus of rupture of the specimens have no significant difference;( 5) the castables with 92% or 99% silica micropowder have high hot modulus of rupture;( 6) the castables with 92% silica micropowder have the worst slag resistance,and the castables with 99%silica micropowder have the best slag resistance.
In order to improve the properties of Al_2O_3-SiC-C castables for iron runner,three kinds of SiO_2 micropowders( w( SiO_2) is 92%,95%,and 99%) with different particle size distribution,average particle sizes,specific surface area,purities and amorphous degrees were separately added to the Al_2O_3-SiC-C castables,and the fluidity,apparent porosity,linear change rate after heat treatment,cold strength,hot strength and slag resistance of the Al_2O_3-SiC-C castables were compared. The results show that:( 1) the fluidity of the castables containing 95% SiO_2 micropowder is better than that of the castables with 92% SiO_2 micropowder; the early fluidity of the castables with 99% SiO_2 micropowder is good but declines fast with the time;( 2) the apparent porosity of the dried specimens varies much,the castables containing 92% silica micropowder have the minimum value and the castables with 99% silica micropowder have the maximum value;( 3) the specimen containing 99% silica micropowder has the minimum shrinkage or expansion rate thus the best volume stability after firing;( 4) the cold modulus of rupture of the specimens have no significant difference;( 5) the castables with 92% or 99% silica micropowder have high hot modulus of rupture;( 6) the castables with 92% silica micropowder have the worst slag resistance,and the castables with 99%silica micropowder have the best slag resistance.
引文
[1]罗琼,陈庆洁,鄢文,等.均质矾土骨料对Al2O3-SiC-C铁沟浇注料性能的影响[J].耐火材料,2015,49(3):190-194.
[2]魏建修,樊海兵,薛海涛,等.矾土骨料对Al2O3-SiC-C铁沟浇注料性能的影响[J].耐火材料,2013,47(4):274-277.
[3]张连进,王义龙,张宏进,等.硼化钙加入量对Al2O3-SiC-C铁沟浇注料性能的影响[J].耐火材料,2016,50(1):60-63.
[4]阮国智,周少坤,张智慧,等.SiO2微粉加入量对Al2O3-Si C-C出铁沟浇注料性能的影响[J].耐火材料,2012,46(4):262-266.
[5]古丽寨娜·哈布都拉,荣巍,程本军.硅微粉对Al2O3-SiC-C质铁沟料的性能影响[J].硅酸盐通报,2016,35(6):1795-1799.
[6]程本军,张萍,李鹏飞,等.硅微粉对铝镁浇注料的性能影响[J].硅酸盐通报,2015,34(7):2062-2067.
[7]王子军,梁小龙,冯晨辉,等.硅微粉的加入对刚玉自流浇注料性能的影响[J].工业炉,2017,39(4):62-64.
[8]王义龙,王子军,马伟平,等.硅微粉对ρ-Al2O3结合莫来石浇注料的影响[J].硅酸盐通报,2014,33(11):3046-3049.
[9]刘新,曲殿利,李志坚.微粉对抗铝浇注料性能的影响[J].硅酸盐通报,2012,31(3):726-730.
[10]薛海涛,顾华志,彭云涛,等.不同二氧化硅微粉对矾土基低水泥浇注料性能的影响[J].耐火材料,2011,45(5):338-340.
[11]薛海涛,顾华志,姚建,等.不同品质硅微粉对矾土基低水泥浇注料性能的影响[J].工业炉,2014,36(1):64-67.
[12]韩行禄.不定形耐火材料[M].2版.北京:冶金工业出版社,2002:180-183,286.
[13]徐迅,卢忠远.纳米二氧化硅对硅酸盐水泥水化硬化的影响[J].硅酸盐学报,2007,35(4):478-485.
[2]魏建修,樊海兵,薛海涛,等.矾土骨料对Al2O3-SiC-C铁沟浇注料性能的影响[J].耐火材料,2013,47(4):274-277.
[3]张连进,王义龙,张宏进,等.硼化钙加入量对Al2O3-SiC-C铁沟浇注料性能的影响[J].耐火材料,2016,50(1):60-63.
[4]阮国智,周少坤,张智慧,等.SiO2微粉加入量对Al2O3-Si C-C出铁沟浇注料性能的影响[J].耐火材料,2012,46(4):262-266.
[5]古丽寨娜·哈布都拉,荣巍,程本军.硅微粉对Al2O3-SiC-C质铁沟料的性能影响[J].硅酸盐通报,2016,35(6):1795-1799.
[6]程本军,张萍,李鹏飞,等.硅微粉对铝镁浇注料的性能影响[J].硅酸盐通报,2015,34(7):2062-2067.
[7]王子军,梁小龙,冯晨辉,等.硅微粉的加入对刚玉自流浇注料性能的影响[J].工业炉,2017,39(4):62-64.
[8]王义龙,王子军,马伟平,等.硅微粉对ρ-Al2O3结合莫来石浇注料的影响[J].硅酸盐通报,2014,33(11):3046-3049.
[9]刘新,曲殿利,李志坚.微粉对抗铝浇注料性能的影响[J].硅酸盐通报,2012,31(3):726-730.
[10]薛海涛,顾华志,彭云涛,等.不同二氧化硅微粉对矾土基低水泥浇注料性能的影响[J].耐火材料,2011,45(5):338-340.
[11]薛海涛,顾华志,姚建,等.不同品质硅微粉对矾土基低水泥浇注料性能的影响[J].工业炉,2014,36(1):64-67.
[12]韩行禄.不定形耐火材料[M].2版.北京:冶金工业出版社,2002:180-183,286.
[13]徐迅,卢忠远.纳米二氧化硅对硅酸盐水泥水化硬化的影响[J].硅酸盐学报,2007,35(4):478-485.