High-temperature molten steel slag is a large amount of industrial solid waste containing available heat energy and resources. This paper introduces an efficient and comprehensive utilization process of high-temperature molten steel slag. The waste heat energy in the high-temperature molten steel slag can be fully recovered through the three-stage heat exchange. Through mass balance and energy balance, the theoretical heat recovery rate can reach 81.42 pct when the waste heat stored in steel slag is converted into usable heat energy, and the exergy efficiency of the overall system is 27.93 pct. When the waste heat stored in the steel slag is converted for electric energy, the theoretical heat recovery rate can reach 24.49 pct, and the exergy efficiency of the overall system is 33.83 pct. When the waste heat stored in steel slag is used for cogeneration, the theoretical heat recovery rate can reach 83.98 pct, and the exergy efficiency of the overall system is 38 pct. The normal-temperature solid steel slag produced by the process is easy for iron selection and subsequent high value-added utilization. The solidification of steel slag in this process consumes a large amount of CO₂ so that the free calcium oxide (f-CaO) in the steel slag is fixed, which is more conducive to subsequent utilization, thereby achieving the purpose of energy saving and emission reduction. Compared with the utilization of traditional steel slag, this process can better utilize the energy and resources contained in steel slag and provides a new method for fully utilizing the waste heat energy and resource attributes of high-temperature molten steel slag.

高温钢水渣是大量含有可利用热能和资源的工业固体废物。介绍了一种高效综合利用高温钢水渣的工艺流程。高温钢水渣中的余热能通过三级换热得到充分回收。通过质量平衡和能量平衡，将钢渣中储存的余热转化为可用热能时，理论热回收率可达81.42%，整个系统的火用效率为27.93%。当钢渣中储存的余热转化为电能时，理论热回收率可达24.49%，整个系统的火用效率为33.83%。当钢渣中储存的余热用于热电联产时，理论热回收率可达83.98%，整个系统的火用效率为38%。该工艺生产的常温固态钢渣易于选铁和后续高附加值利用。该过程中钢渣的凝固消耗了大量的CO₂使钢渣中的游离氧化钙（f-CaO）固定，更有利于后续利用，从而达到节能减排的目的。与传统钢渣利用相比，该工艺可以更好地利用钢渣中所含的能源和资源，为充分利用高温钢水渣的余热能和资源属性提供了一种新方法。