摘要
采用不同粒度碳化硅部分取代高炉炭砖中的电煅煤骨料,借助X射线衍射仪、场发射扫描电镜、能谱仪以及激光导热仪等研究了碳化硅的引入对高温焙烧后高炉炭砖物相组成、显微结构和导热系数等性能的影响,并使用支持向量机回归建模算法建立了炭砖导热系数的数学模型,分析了各因素对炭砖导热系数影响程度。结果表明:碳化硅的加入可促进炭砖基体内原位陶瓷相Al N和β-Si C晶须的生成,进而有助于提高炭砖的耐压强度、导热系数和抗铁水侵蚀性能;由支持向量机建模分析得知,大粒度碳化硅的加入量和焙烧温度对导热系数提高的影响较为明显,适当增大大粒度碳化硅的含量并提高焙烧温度有可能进一步提高炭砖的导热系数。
The anthracite aggregates in carbon blocks for blast furnace were partially substituted by SiC with different particle size in present paper and the effect of SiC on phase composition,microstructure and thermal conductivity of carbon blocks fired at elevated temperatures was investigated with the aid of XRD,SEM,EDS and Laser thermal conductivity meter.Mathematical model of thermal conductivity was established by using support vector machine to analyze impact degree of different parameters on thermal conductivity.The result shows that addition of SiC could accelerate the formation of in-situ AlN andβ-SiC whiskers,thus improving the cold crushing strength,thermal conductivity and hot metal corrosion resistance of carbon blocks.The support vector machine modeling analysis reveals that the amount of coarse SiC and firing temperature has a great influence on thermal conductivity.The thermal conductivity of carbon blocks could be further enhanced by increasing the addition amount of coarse SiC and firing temperature appropriately.
作者
王同生
桑绍柏
李亚伟
WANG Tong-sheng;SANG Shao-bai;LI Ya-wei(State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第9期2913-2918,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金面上项目(51574186)
关键词
碳化硅
导热系数
支持向量机
高炉炭砖
SiC
thermal conductivity
support vector machine
carbon block
