摘要
现有滑板服役周期短,导致了高质量原材料的大量浪费,将用后滑板回收到合适的耐火材料中可以降低成本并获得相近的性能。以高铝矾土、铝碳复合滑板再生料(简称“再生料”)、SiC为骨料,以白刚玉粉、SiO_(2)微粉、Si粉、α-Al_(2)O_(3)微粉、Secar 71水泥、球状沥青为细粉,制备了Al_(2)O_(3)-SiC-C(ASC)浇注料。研究了再生料的性能特点,以及再生料等量代替高铝矾土的替代量(替代质量分数分别为0、6%、12%、18%、24%)对ASC浇注料性能的影响。结果表明:1)再生料的Al_(2)O_(3)含量与矾土的接近,并同时含有石墨、Al、Si,再生料的体积密度低于高铝矾土的;2)再生料的引入促进了ASC浇注料中SiC晶须的生成,提高了ASC浇注料的常温强度和抗热震性能;3)再生料具有更高的反应活性,能够通过反应烧结增强与基质间的结合,阻碍熔渣进一步渗透,提高ASC浇注料的抗渣侵蚀性能,添加24%(w)再生料的ASC浇注料可以满足出铁沟的性能要求。
The short service life of the currently used slide gates leads to significant waste of high-quality raw materials.Recycling spent slide gate materials into appropriate refractories can reduce costs and achieve comparable performance.In this work,Al_(2)O_(3)-SiC-C(ASC)castables were prepared using bauxite,the recycled alumina-carbon composite slide gate materials(abbreviated as“recycled material”hereinafter)and SiC as aggregates,and white corundum powder,SiO_(2)micropowder,Si powder,α-Al_(2)O_(3)micropowder,Secar 71 cement and spherical asphalt as fine powders.The performance of the recycled materials and the influence of the recycled materials addition to substitute for the bauxite(0,6%,12%,18%,and 24%,by mass)on the properties of the ASC castables were investigated.The results show that:(1)the recycled material has similar Al_(2)O_(3)content to bauxite,containing graphite,Al,and Si,and slightly lower bulk density;(2)the introduction of the recycled material promotes the generation of SiC whiskers in the ASC castables,improving the cold strength and thermal shock resistance;(3)the recycled material exhibits higher reactivity,which can enhance the bonding with the matrix through reactive sintering,hinder further slag penetration and improve the slag corrosion resistance of the ASC castables;the ASC castables with 24%recycled material meet the performance requirements for the iron trough.
作者
陈聪
韩兵强
魏佳炜
钟虎堂
赵浩浩
段俊龙
Chen Cong;Han Bingqiang;Wei Jiawei;Zhong Hutang;Zhao Haohao;Duan Junlong(State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)
出处
《耐火材料》
北大核心
2025年第6期471-476,共6页
Refractories
基金
湖北省科技计划项目(2024CSA075)。
