刚玉质浇注料气孔孔径与透气度灰色关联度分析
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摘要
为探究刚玉质低水泥浇注料气孔孔径对透气度的影响,以电熔白刚玉和铝酸钙水泥为主要原料,利用浇注料气孔结构参数随烘烤温度(100、300和600℃)和烘烤时间(1、3、5、10、15和24 h)的变化,制备了气孔结构参数不同的低水泥浇注料试样,结合灰色系统理论研究了不同孔径范围气孔对透气度的影响。结果表明:100℃烘烤后,孔径在0. 3~0. 1和﹤0. 1μm的气孔与透气度的灰色关联度最大; 300℃烘烤后,孔径在0. 3~0. 1和5~1μm的气孔与透气度的灰色关联度最大; 600℃烘烤后,孔径在0. 3~0. 1和﹤0. 1μm的气孔与透气度的灰色关联度最大。因此,在所有烘烤温度下,孔径在0. 3~0. 1μm的气孔与浇注料的透气度灰色关联度均最大,说明孔径在0. 3~0. 1μm的气孔对浇注料透气度的影响最大。
This work aims at investigating the effect of pore size on air permeability of alumina based low cement castables. Castable specimens were prepared using white fused alumina and calcium aluminate cement as the main starting materials,adjusting their pore structure parameters by controlling the baking temperature( 100,300 and 600 ℃) and baking duration( 1,3,5,10,15 and 24 h). Combined with the grey system theory,the effect of pore size on the permeability was investigated. The results show that,after baking at 100 ℃,pores with diameter of 0. 3-0. 1 μm and < 0. 1 μm have the highest degree of grey correlation with air permeability; after baking at 300 ℃,pores with diameters in the range of 0. 3-0. 1 μm and 5-1 μm have the highest degree of grey correlation with air permeability; after drying at 600 ℃,pores with diameter in the range of 0. 3-0. 1 μm and < 0. 1 μm have the highest degree of grey correlation with air permeability. For all baking temperatures,pores with diameter of 0. 3-0. 1 μm have the highest degree of grey correlation with air permeability,indicating that pores in this range have the greatest influence on the air permeability of castables.
This work aims at investigating the effect of pore size on air permeability of alumina based low cement castables. Castable specimens were prepared using white fused alumina and calcium aluminate cement as the main starting materials,adjusting their pore structure parameters by controlling the baking temperature( 100,300 and 600 ℃) and baking duration( 1,3,5,10,15 and 24 h). Combined with the grey system theory,the effect of pore size on the permeability was investigated. The results show that,after baking at 100 ℃,pores with diameter of 0. 3-0. 1 μm and < 0. 1 μm have the highest degree of grey correlation with air permeability; after baking at 300 ℃,pores with diameters in the range of 0. 3-0. 1 μm and 5-1 μm have the highest degree of grey correlation with air permeability; after drying at 600 ℃,pores with diameter in the range of 0. 3-0. 1 μm and < 0. 1 μm have the highest degree of grey correlation with air permeability. For all baking temperatures,pores with diameter of 0. 3-0. 1 μm have the highest degree of grey correlation with air permeability,indicating that pores in this range have the greatest influence on the air permeability of castables.
引文
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[2]姜东梅,李红霞,王战民,等.纳米科技在耐火材料中的研究现状及发展趋势[J].耐火材料,2006,40(4):297-299.
[3]周宁生,王战民,张三华.耐火浇注料施工和使用性能测试方法的改进[J].耐火材料,1997,31(3):164-166.
[4]朱伯铨,方斌祥,李享成,等.气孔结构参数对耐火浇注料性能影响的研究进展[J].耐火材料,2010,44(1):63-66.
[5]何霞,王战民,李再耕.低水泥浇注料抗爆裂性能的改善[J].耐火材料,1997,31(1):29-32.
[6]王战民,赵瑾,曹喜营,等.致密耐火浇注料快速烘烤致爆裂研究[J].硅酸盐学报,2014,42(6):768-772.
[7]邓聚龙.灰色系统理论教程[M].武汉:华中理工大学出版社,1990:1-3.
[8] STONIS R,ANTONOVICH V,PUNDENE I,et al. Effect of temperature on the curing of medium-cement refractory concrete with a composite deflocculant[J]. Refract Ind Ceram,2012,52(6):414-418.
[9] CARDOSO F A,INNOCENTINI M D M,AKIYOSHI M M,et al.Effect of curing time on the properties of CAC bonded refractory castables[J]. J Eur Ceram Soc,2004,24(7):2073-2078.
[10]张金喜,冉晋,马宝成,等.碳化对混凝土抗冻性的影响及机理[J].建筑材料学报,2017,20(1):12-17.
[11]刘燕春,周振龙,纪国富,等.低水泥浇注料干燥特性的研究[J].钢铁,1992(11):45-48.
[12]王俊,张大飞.低水泥浇注料加热炉的快速烘炉[J].机械制造与自动化,2011,40(5):44-44.
[13]罗明勇.大掺量矿渣水泥基材料孔隙结构与透气性研究[D].北京:清华大学,2013.
[14]陈悦,李东旭.压汞法测定材料孔结构的误差分析[J].硅酸盐通报,2006,25(4):198-201.
[15]常东武.压汞法测量孔隙时减小误差的方法及分析[J].实验技术与管理,2003,20(5):76-80.
[16]汤永净,汪鹏飞,邵振东.压汞实验和误差分析[J].实验技术与管理,2015,32(5):50-54.
[17]申卯兴,薛西锋,张小水.灰色关联分析中分辨系数的选取[J].空军工程大学学报:自然科学版,2003,4(1):68-70.
[18]肖新平,谢录臣,黄定荣.灰色关联度计算的改进及其应用[J].数理统计与管理,1995(5):27-30.