真空碳热还原温度对电炉钢渣自粉化的影响  

Effect of Vacuum Carbon-Thermal Reduction Temperature on Self-Pulverization of Steel Slag in Electric Furnace

作　　者：罗万平 雷玉办 郑玉龙[3] 黄润[1] 龙显泽 杨明杰 顾建超 高美琳 阎鑫宇 LUO Wanping;LEI Yuban;ZHENG Yulong;HUANG Run;LONG Xianze;YANG Mingjie;GU Jianchao;GAO Meilin;YAN Xinyu(School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Guangxi Modern Polytechnic College,Hechi 547099,China;Shougang Guiyang SPECIAL Steel Co.,Ltd.,Guiyang 550299,China)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]广西现代职业技术学院,河池547099 [3]首钢贵阳特殊钢有限责任公司,贵阳550299

出　　处：《真空科学与技术学报》2024年第5期428-435,共8页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金项目(52064010);贵州大学创新创业项目(gzusc2023003);广西高校中青年教师科研基础能力提升项目(2022KY1434)。

摘　　要：为解决电炉钢渣易磨性差,文章采用理论计算结合真空碳热还原的方法对电炉钢渣进行还原研究。通过理论计算确定电炉钢渣中各组分随还原温度升高时的变化情况,从而设定真空碳热还原实验的还原温度区间。实验结果表明,随着还原温度的不断升高电炉钢渣自粉化效果呈现出一个先上升后下降的趋势,同时Fe不断被还原出来并表现出明显的聚集效果有利于后续的分离回收。最佳还原条件为:配碳量16%,碱度R=1,保温60 min,1450℃下电炉钢渣的自粉化率达到93.8%,试样中粒径小于89.2μm颗粒占比高达90%。相较于传统电炉钢渣自粉化研究,在常压空气气氛下,还原温度高达1600℃时,电炉钢渣自粉化率仅达到49.97%,真空碳热还原具有粉化率高还原温度低的明显优势。In order to solve the poor grindability of electric furnace steel slag,the reduction of electric furnace steel slag is studied by using theoretical calculation combined with vacuum carbon thermal reduction.The changes of each component in the electric furnace steel slag with the increase of reduction temperature were determined by theoretical calculation,and the reduction temperature range of the vacuum carbon-thermal reduction experiment was set.The experimental results show that with the increasing reduction temperature,the self-pulverization effect of electric furnace steel slag shows a trend of first increasing and then decreasing,while Fe is continuously reduced and shows an obvious aggregation effect,which is conducive to subsequent separation and recovery.The optimal reduction conditions were as follows:carbon content of 16%,alkalinity R=1,heat preservation for 60 min,the selfpulverization rate of electric furnace steel slag reached 93.8%at 1450℃,and the proportion of particles with a particle size of less than 89.2μm in the sample was as high as 90%.Compared with the traditional research on the self-pulverization of electric furnace steel slag,the self-pulverization rate of electric furnace steel slag only reaches 49.97%when the reduction temperature is as high as 1600℃in an atmospheric air atmosphere,and the vacuum carbon thermal reduction has the obvious advantages of high pulverization rate and low reduction temperature.

关 键 词：电炉钢渣 真空碳热还原 热力学 粒度 自粉化 

分 类 号：TF135[冶金工程—冶金物理化学]