为了剖析当今钢铁工业固相二次资源的利用水平、存在问题，提出解决途径，进一步提高工业绿色和低碳水平，本工作介绍了钢铁工业的气相、固相和液相二次资源内容，概述了国内外钢铁工业固相二次资源(以下称：固废)的研究和利用现状。由于钢铁工业固废利用的难点和堵点是钢渣的利用，本工作重点以钢铁工业钢渣为例，介绍了其在国内外的利用概况、存在的共性问题，并提出了解决的途径。由于钢渣是在现有炼钢的特有高温物化环境中产生的，导致钢渣成为一种过烧的硅酸盐产物，其活性差、易磨性差、含铁量高，还含有一定量的游离氧化钙(f-CaO)，给钢渣资源和热量的回收及利用都带来了非常大的难度，以至于全世界对钢渣资源和余热的利用还没有找到理想的方法。因此，钢渣成为世界钢铁工业固相二次资源绿色处理和低碳利用的难点和堵点。本工作在剖析了钢铁工业固废利用技术目前存在的各类问题基础上，根据当前国家政策法规的要求，针对上述存在问题提出了应对的对策途径，为钢铁工业固废下一步高效、绿色和高值利用，提供了建议和研究方向。

In order to improve the steel industrial secondary resources utilization level (steel slag as an example), the different gas, liquid, and solid phase secondary resources (wastes) from the steel industry are introduced first, and then the recent situation of the solid phase secondary resources is introduced. The problems and the relevant countermeasures are put forward for steel slag future utilization. So far steel slag is one of the most difficult proposals and utilization of solid secondary resources, and has become a hot topic in the world steel industry. So new steel slag technologies and product development are urgently needed for high efficiency, cleaner, and high value-added utilization for steel slag utilization.So new steel slag technologies and product development are urgently needed for high efficiency, cleaner, and high value-added utilization for steel slag.