Utilization of converter steel slag by remelting and reducing treatment

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Ma, Jiao^1 ; Zhang, Yibo^1 ; Hu, Tianqi^1 ; Sun, Shushan^1

Central Research Institute of Building and Construction, MCC Group, Beijing

100088, China^1

关键词: Cement and concrete industries;    Chemical compositions;    Converter steel slags;    ITS applications;    Reducing treatment;    Reduction of iron oxide;    Supplementary cementitious material;    Utilization rates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/2/022088/pdf
DOI  :  10.1088/1757-899X/382/2/022088

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In China, as by-products of iron and steel industry, the utilization rate of steel slag is still relatively low and its open-air stacking occupies a lot of land, where there is a quite different situation of blast furnace slag as supplementary cementitious material in concrete. Considerable amount of metallic iron and iron oxide are lost within slag. In addition, undesirable volume change occurs when slag used as admixture in construction due to high free-CaO content, limiting its application in cement and concrete industry. In this study, remelting and reducing treatment was conducted to recycle iron and modify the chemical composition of the residue. Results showed that iron oxide could be reduced to iron and adjusting materials were found to promote reduction of iron oxide and stability of slag and separation of iron and slag.