钢渣的处理工艺和综合利用

Treatment process and comprehensive utilization of steel slag

钢渣作为冶金产业的主要固体废弃物,由于其产量大、稳定性差等特点,导致我国整体利用率处于较低水平。介绍了包钢热闷钢渣的组成成分,阐述目前国内主要的处理工艺及优缺点,以及不同的处理条件下,钢渣的成分差异、使用率及主要应用厂家。结合钢渣的矿相、物理性质详细阐述了国内外钢渣的利用现状和使用途径,主要包括企业内部循环和企业外部循环两种方式,企业内部循环主要包括用于回收废钢铁和用作烧结材料方面,企业外部循环主要包括筑路施工和建筑、农业肥料生产及土壤改良、混凝土、烟气脱硫、吸收二氧化碳、功能材料等相关领域。另外,针对目前钢渣利用的不足之处,展望钢渣未来的发展方向。

Steel slag,as the main solid waste in the metallurgical industry,has a low overall utilization rate in China due to its large output and poor stability.The composition of hot pressed steel slag at Baotou Steel has been introduced in the text.The current main treatment processes and advantages&disadvantages in China have been elaborated,as well as the differences in composition,utilization rate,and main application manufacturers of steel slag under different treatment conditions.Based on the mineral phase and physical properties of steel slag,the current utilization status and usage pathways of steel slag both domestically and internationally have been elaborated,mainly including internal and external circulation of enterprises.Internal circulation of enterprises mainly includes the recycling of waste steel and the use of sintering materials.External circulation of enterprises mainly includes road construction and construction,agricultural fertilizer production and soil improvement,concrete,flue gas desulfurization,carbon dioxide absorption,and functional materials and related fields.In addition,aiming at the shortcomings in the current utilization of steel slag,the future development direction of steel slag has been expected.