氧化铝微粉粒度对低碳镁碳材料结构与性能的影响
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- 英文论文题名：Effect of Particle Size of Alumina on Structure and Properties of Low-carbon Magnesia Carbon Materials
- 论文作者：张彦祥 ; 李红霞 ; 刘国齐 ; 杨金松 ; 杨文刚
- 英文论文作者：ZHANG Yanxiang ; LI Hongxia ; LIU Guoqi ; YANG Jinsong ; YANG Wengang ; Sinosteel Luoyang Institute of Refractories Research Co. ; Ltd. ; State Key Laboratory of Advanced Refractories
- 年：2016
- 作者机构：中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室;
- 论文关键词：粒度 ; 氧化铝微粉 ; 低碳镁碳材料 ; 尖晶石化
- 英文论文关键词：particle size ; alumina ; low-carbon magnesia carbon ; spinalization
- 会议召开时间：2016-11-18
- 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
- 语种：中文
- 分类号：TQ175.1
- 学会代码：CLDB
- 会议名称：第一届先进材料前沿学术会议
- 会议地点：中国陕西西安
- 主办单位：《材料导报》杂志社
- 学会名称：材料导报编辑部
- 页数：5
- 文件大小：1427k
- 原文格式：O
- 会议级别：全国
摘要
为提高低碳镬碳耐火材料的性能,以3~1 mm、≤1 mm、≤0.074 mm的电熔镬砂、≤0.15 mm的鳞片石墨和不同粒度(≤20μm、≤45μm、≤88μm、≤200μm)的氧化铝微粉为主要原料,酚醛树脂为结合剂,在200℃固化24 h、950℃和1 550℃保温3 h烧成制备低碳镬碳材料试样。研究了氧化铝微粉粒度分别对低碳镬碳材料试样的显气孔率、体积密度、耐压强度、常温抗折强度、高温抗折强度、抗热震性能等性能及相组成与显微结构的影响。结果表明,随着氧化铝微粉粒度的增加,材料的耐压强度、常温抗折强度和高温抗折强度均先增加后减小,抗热震性能先得到改善后变差,氧化铝微粉粒度为88μm时性能达到最好。
In order to improve the properties,magnesia-carbon specimens were prepared by using fused magnesia(3-1 mm,≤1 mm,≤0.074 mm),flake graphite(≤0.15 mm) and alumina powder with different size(≤20 μm,≤45 μm,≤88 μm,≤200μm) as the main raw materials,and phenolic resin as the binder by curing at 200 ℃ for 24 h and heat-treating at 950 ℃ and 1 550 ℃for 3 h.The effects of particle size of alumina on apparent porosity,bulk density,cold crushing strength,cold flexural strength,hot flexural strength,thermal shock resistance,phase compositions and microstructures were studied.The results show that with the increase of the particle size of alumina,the cold crushing strength,cold flexural strength,and hot flexural strength increase firstly and then decrease.The thermal shock resistance of specimens firstly improves and then deteriorates.Considering the comprehensive performance,the optimal particle size of alumina is 88 μm for low-carbon magnesia carbon materials.
In order to improve the properties,magnesia-carbon specimens were prepared by using fused magnesia(3-1 mm,≤1 mm,≤0.074 mm),flake graphite(≤0.15 mm) and alumina powder with different size(≤20 μm,≤45 μm,≤88 μm,≤200μm) as the main raw materials,and phenolic resin as the binder by curing at 200 ℃ for 24 h and heat-treating at 950 ℃ and 1 550 ℃for 3 h.The effects of particle size of alumina on apparent porosity,bulk density,cold crushing strength,cold flexural strength,hot flexural strength,thermal shock resistance,phase compositions and microstructures were studied.The results show that with the increase of the particle size of alumina,the cold crushing strength,cold flexural strength,and hot flexural strength increase firstly and then decrease.The thermal shock resistance of specimens firstly improves and then deteriorates.Considering the comprehensive performance,the optimal particle size of alumina is 88 μm for low-carbon magnesia carbon materials.
引文
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2 Ma Beiyue,Zhu Qiang,Sun Yong,et al.Synthesis of Al_2O_3-SiC composite and its effect on the properties of low-carbon MgOC refractories[J].J Mater Sci Technol,2010,26(8):715.
3 Aneziris C G,Hubdlkovd J,Barabds R.Microstructure evaluation of MgO-C refractories with TiO_2-and Al-additions[J].J Eur Ceram Soc,2007,27(1):73.
4李楠,张文杰.碳复合耐火材料[M].北京:科技出版社,1990.
5李楠,顾华志.耐火材料学[M].北京:冶金工业出版社,2002:185.
6 Leonardo Msante,Vanesa Munoz.High temperature mechanical behavior of Al_20_3-MgO-C refractories for steelmaking use[J].Ceram Int,2011,37(5):1472.
7 Gokce A S,Gurcan C.The effect of antioxidants on the oxidation behaviour of magnesia-carbon refractory bricks[J].Ceram Int,2008,34(2):323.
8 Xie Zhaohui,Ye Fangbao.Effect ofα-Al_2O_3 Micro-powder on properties of low carbon MgO-C refractories[J].Bull Chin Ceram Soc,2009,28(6):1249.(in Chinese)谢朝晖,叶方保.α-Al_2O_3微粉对低碳MgO-C材料性能的影响[J].硅酸盐通报,2008(6):1249.
9 Bavand-Vandchali M,Golestani-Fard F,et al.The influence of in situ spinel formation on microstructure and phase evolution of MgOC refractories[J].J Eur Ceram Soc,2008,28(3):563.
10 Tripathi H S,Ghosh A.Spinelisation and properties of AI2O3-MgAl_2O_4-C refractory:Effect of MgO and Al_2O_3 reactants[J].Ceram Int,2010,36(4):1189.
11 Bavand-Vandchali.Atmosphere and carbon effects on microstructure and phase analysis of in situ spinel formation in MgO-C refractories matrix[J].Ceram Int,2009,35(2):861.