工程科学学报，第40卷，第10期：1237-1243,2018年10月 Chinese Journal of Engineering,Vol.40,No.10:1237-1243,October 2018 DOI:10.13374/j.issn2095-9389.2018.10.011;http://journals.ustb.edu.cn 不同镁含量钢渣陶瓷的致密化机制 宗燕兵，张学东⑧，马晴雨，苍大强 北京科技大学冶金与生态工程学院.北京100083 区通信作者，E-mail:zhangxuedong92@yeah.net 摘要为了获得钢渣制备陶瓷过程中，烧结温度和保温时间的影响规律及实现样品的致密化，在传统研究关于配方试制及 性能检测的基础上，以钢渣、黏土等为主要原料制备出钢渣陶瓷，针对低镁样品和高镁样品，研究了烧结温度和保温时间对样 品烧结性能的影响及致密化规律。基于烧结速率方程建立了烧结温度和保温时间对样品线性收缩率的函数关系.通过动力 学分析，得出不同条件下的烧结激活能，分析认为不同Mg含量下陶瓷样品的致密化方式为扩散控制，低镁样品烧结温度为 1000℃时，物质迁移由表面扩散控制，1100℃时，以体积扩散为主：高镁样品在1110℃以上烧结时，主要由液相烧结过程的扩 散控制 关键词钢渣；陶瓷；致密化：线性收缩率：动力学 分类号TF09 Densification mechanism of slag ceramics with different magnesium contents ZONG Yan-bing,ZHANG Xue-dong,MA Qing-yu,CANG Da-qiang School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:zhangxuedong92@yeah.net ABSTRACT Steel slag is an industrial solid waste generated during the steelmaking process and is an important secondary resource. Since steel slag is rich in aluminosilicates,it can be used to make ceramics.The use of steel slag to prepare ceramics plays an impor- tant role in the utilization of it.In this paper,the effect of the sintering temperature and holding time on the sintering process and the densification of products during the preparation of ceramics from steel slag were explored.In particular,low magnesium (Mg)and high Mg samples were chosen for study.The Mg oxide content for the low Mg sample was 2.52%and it was 10.50%for the high Mg sam- ple.Current studies of steel slag ceramics mainly consider the amount of steel slag,the basic formula of the trial,the subsequent per- formance of the test specimen,the influence of a certain element on the mechanical properties,and the crystal phase of the ceramic.In this work,the preparation of the ceramics with steel slag and clay as main raw materials was considered.By establishing the kinetic de- scription of the sintering process,the sintering activation energy with different magnesium contents could be calculated.The sintering activation energy for the low magnesium and high magnesium ceramic samples was relatively small,and was 36 kJ.mol-and 54 kJ. mol,respectively.Meanwhile,the densification of the ceramic samples with different magnesium contents was investigated.It is concluded that the material migration mechanism is controlled by surface diffusion when the sintering temperature of the low magnesium sample is 1000 C.At 1100C,the volume diffusion is the main control mode.When the high magnesium sample is sintered at 1110C or higher,the sintering process is mainly controlled by the diffusion of the liquid phase. KEY WORDS steel slag;ceramic;densification;linear shrinkage;kinetic 收稿日期：2017-11-14 基金项目：国家自然科学基金资助项目(51474028)：国家重点研发计划重点专项资助项目(2017Y℉00210301)：宁波市科技惠民资助项目 (2015C50058)工程科学学报,第 40 卷,第 10 期:1237鄄鄄1243,2018 年 10 月 Chinese Journal of Engineering, Vol. 40, No. 10: 1237鄄鄄1243, October 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 10. 011; http: / / journals. ustb. edu. cn 不同镁含量钢渣陶瓷的致密化机制 宗燕兵, 张学东苣 , 马晴雨, 苍大强 北京科技大学冶金与生态工程学院, 北京 100083 苣通信作者, E鄄mail: zhangxuedong92@ yeah. net 摘 要 为了获得钢渣制备陶瓷过程中,烧结温度和保温时间的影响规律及实现样品的致密化,在传统研究关于配方试制及 性能检测的基础上,以钢渣、黏土等为主要原料制备出钢渣陶瓷,针对低镁样品和高镁样品,研究了烧结温度和保温时间对样 品烧结性能的影响及致密化规律. 基于烧结速率方程建立了烧结温度和保温时间对样品线性收缩率的函数关系. 通过动力 学分析,得出不同条件下的烧结激活能,分析认为不同 Mg 含量下陶瓷样品的致密化方式为扩散控制,低镁样品烧结温度为 1000 益时,物质迁移由表面扩散控制,1100 益时,以体积扩散为主;高镁样品在 1110 益 以上烧结时,主要由液相烧结过程的扩 散控制. 关键词 钢渣; 陶瓷; 致密化; 线性收缩率; 动力学 分类号 TF09 收稿日期: 2017鄄鄄11鄄鄄14 基金项目: 国家自然科学基金资助项目(51474028);国家重点研发计划重点专项资助项目(2017YFC0210301);宁波市科技惠民资助项目 (2015C50058) Densification mechanism of slag ceramics with different magnesium contents ZONG Yan鄄bing, ZHANG Xue鄄dong 苣 , MA Qing鄄yu, CANG Da鄄qiang School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣Corresponding author, E鄄mail: zhangxuedong92@ yeah. net ABSTRACT Steel slag is an industrial solid waste generated during the steelmaking process and is an important secondary resource. Since steel slag is rich in aluminosilicates, it can be used to make ceramics. The use of steel slag to prepare ceramics plays an impor鄄 tant role in the utilization of it. In this paper, the effect of the sintering temperature and holding time on the sintering process and the densification of products during the preparation of ceramics from steel slag were explored. In particular, low magnesium (Mg) and high Mg samples were chosen for study. The Mg oxide content for the low Mg sample was 2郾 52% and it was 10郾 50% for the high Mg sam鄄 ple. Current studies of steel slag ceramics mainly consider the amount of steel slag, the basic formula of the trial, the subsequent per鄄 formance of the test specimen, the influence of a certain element on the mechanical properties, and the crystal phase of the ceramic. In this work,the preparation of the ceramics with steel slag and clay as main raw materials was considered. By establishing the kinetic de鄄 scription of the sintering process, the sintering activation energy with different magnesium contents could be calculated. The sintering activation energy for the low magnesium and high magnesium ceramic samples was relatively small, and was 36 kJ·mol - 1 and 54 kJ· mol - 1 , respectively. Meanwhile, the densification of the ceramic samples with different magnesium contents was investigated. It is concluded that the material migration mechanism is controlled by surface diffusion when the sintering temperature of the low magnesium sample is 1000 益 . At 1100 益 , the volume diffusion is the main control mode. When the high magnesium sample is sintered at 1110 益 or higher, the sintering process is mainly controlled by the diffusion of the liquid phase. KEY WORDS steel slag; ceramic; densification; linear shrinkage; kinetic