侧吹熔炼含铁冶炼渣玻璃化研究  

Research on vitrification of side-blown smelting ferrous smelting slag

作　　者：徐小锋 李冲[1] 张国华 黎敏 崔沐[1] 代文彬[1] 李志博 兰欣 XU Xiaofeng;LI Chong;ZHANG Guohua;LI Min;CUI Mu;DAI Wenbin;LI Zhibo;LAN Xin(China ENFI Engineering Corporation,Beijing 100038,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中国恩菲工程技术有限公司,北京100038 [2]中南大学资源加工与生物工程学院,湖南长沙410083 [3]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《中国有色冶金》2023年第1期131-139,共9页China Nonferrous Metallurgy

基　　金：国家重点研发计划资助项目“含硫铁渣钙/铁分离与高品位铁精粉制备技术与装备”(2021YFC2902504);院士工作站合作研发项目(ENFIBMGGG10P088)。

摘　　要：为实现危险废物侧吹熔炼含铁冶炼渣的无害化处理,本文采用高温熔融玻璃化技术进行处理,通过掺杂不同质量比例的氧化硅控制碱度,在不同熔融温度、不同冶炼气氛下进行熔融,而后进行水碎。结果表明:随着碱度的下降,熔渣的玻璃态物质占比升高、半球温度明显降低、Fe^(3+)/Fe^(2+)比例略微下降、黏度上升;同时,当冶炼气氛氧分压下降时,熔渣的玻璃态物质占比和半球温度明显降低,Fe^(3+)/Fe^(2+)比例均呈下降趋势;1380~1420℃区间内,熔炼温度对上述性质影响不太明显;温度升高,玻璃态物质占比、半球温度和黏度略有下降;熔融温度1400℃时,在CO和CO_(2)分压比例1∶1、保温时间3 h、碱度0.7的最佳工艺下,用含铁冶炼渣制备出的玻璃体中有害元素的浸出毒性及酸溶失率远低于相关表征限值要求,可以实现无害化处置。In the study,advanced vitrification technology is adopted to achieve harmless treatment of hazardous side-blown smelting ferrous smelting slag.Various proportions of silica were added to control the basicity of the raw materials,and different melting temperatures as well smelting atmospheres were set to prepare glassy products.The results showed that:with the decrease of alkalinity,the vitrification degree of the slag system increased,the hemispheric temperature decreased significantly,the Fe^(3+)/Fe^(2+)ratio decreased slightly,and the viscosity increased;meanwhile,when the oxygen partial pressure of the smelting atmosphere decreased,the vitrification degree,the hemispheric temperature and the Fe^(3+)/Fe^(2+)ratio of the slag system all showed a decreasing trend;in the range of 1380~1420℃,smelting temperature had little effect on the above comprehensive properties;the vitrification degree,hemispherical temperature and viscosity decreased slightly with the increase of temperature;under the optimal experimental conditions(temperature 1400℃,CO∶CO_(2)=1∶1,holding time 3 h and basicity 0.7),the toxic substances and acid dissolution rate in the glassy products prepared from side-blown ferrous smelting slag were much lower than that of the limited value,and could realize the harmless disposal.

关 键 词：危险废物 含铁渣 玻璃化 浸出毒性 无害化 冶炼渣 氧化硅 酸溶失率 

分 类 号：X756[环境科学与工程—环境工程] TF803.1[冶金工程—有色金属冶金]