为了提高镁铝尖晶石浇注料的性能，研究了氧化锡加入量（质量分数分别为5％、7．5％和10％）对基质中分别采用板状刚玉 T60和活性氧化铝 CL370的镁铝尖晶石浇注料性能和显微结构的影响。结果表明：在镁铝尖晶石浇注料中添加氧化锡，随着氧化锡添加量的增加，采用板状刚玉试样的显气孔率和烧后线变化率减小，常温抗折强度增大；而采用活性氧化铝试样则以氧化锡添加量为7．5％（w）时显气孔率和烧后线变化率最小，常温抗折强度最大。添加氧化锡的镁铝尖晶石浇注料在1450℃煅烧5 h 后均含有 Mg2 SnO4、CaSnO3和Ca2 SnO4。可见，氧化锡在高温下与镁砂和铝酸钙水泥发生一系列原位反应提高组分之间的结合，并促进浇注料的烧结。
Effects of tin oxide additions (5%,7.5% and 10% by mass)on the properties and microstructure of magnesium aluminate spinel castables adopting tabular corundum T60 or reactive alumina CL370 as the matrix were researched in order to improve the properties of magnesium aluminate spinel castables.The results show that with the tin oxide addition increasing,the apparent porosity and linear change on heating of castables made from tabular alumina decrease,and the cold modulus of rupture increases;the apparent porosity and linear change on heating of castables made from reactive alumina with 7.5% SnO2 addition is the lowest,and the cold modulus of rupture reaches the maximum value;the main reaction products include Mg2 SnO4 ,CaSnO3 and Ca2 SnO4 in castables after calcined at 1 450 ℃ for 5 h;tin oxide addition can strengthen the bonding between the components of castables by in-situ reactions,and promote the sintering.
参考文献
| [1] | 李正平 .炼铜转炉用耐火材料损毁机理研究[D].西安建筑科技大学,2003. |
| [2] | 萧治彭.耐火材料在有色金属冶炼炉窑上的应用[J].资源再生,2012(04):54-57. |
| [3] | 陈肇友.有色金属火法冶炼用耐火材料及其发展[J].资源再生,2008(08):46-49. |
| [4] | Bradt R C .Mg-Al spinel:Is it the mullite of the 21 st century[J].Refract Appl News,2004,9(04):8-10. |
| [5] | 刘锡俊,袁林,刘维,朱维忠,叶亚红,翟耀杰.有色冶炼炉用耐火材料研究与应用[J].中国有色金属,2013(20):60-63. |
| [6] | 韦志仁,李军,刘超,林琳,郑一博,葛世艳,张华伟,窦军红.水热法合成SnO2金红相纳米柱晶体[J].人工晶体学报,2006(01):107-109. |
| [7] | Yuan W J;Zhu Q Y;Deng C J.Effects of SnO2 addition on the properties of alumina-magnesia refractory castables[J].New J Glass Ceram,2015(05):1-7. |
| [8] | Jedynak L;Wojsa J;Podworny J et al.Refractories from the MgO-Al2 O3 -SnO2 system for metallurgical applications[J].Ceram Mater,2011,63(01):34-39. |
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