Along with steel production, various steelmaking slags are constantly gener-ated at considerably high rates. In general, steelmaking slags are not catego-rized into hazardous materials and do not cause any environmental issues. Therefore, recycling of steelmaking slags is often aimed at creating values by using the slags to replace high-cost raw materials. Chemical compositions and particle size distributions of slag products made from steelmaking slags will determine what raw materials the slag products can replace. Consequently, maximizing the values of steelmaking slags will require to produce slag prod-ucts with the highest values and to process the slags with the lowest costs. In this paper, several slag processing processes are assessed based on maximiza-tion of the values of the steelmaking slags.