Effective Use of Carbonaceous Materials from Waste in Ironmaking Process

有效利用废弃物对环境保护很重要。本文对利用废弃物中的碳质材料作为还原剂在炼铁过程中的应用进行了基础性研究。将来自废物（城市废物和木本生物质）的碳质材料与赤铁矿试剂混合。在N_2气氛中，用热重分析仪（TG）或立管电炉在1000-1200℃下加热。结果，使用石墨的混合物样品的反应停滞，使用城市垃圾和木本生物质的混合物样品的反应进行而没有反应停滞。这是因为城市垃圾和木本生物质的反应性比石墨的反应性好。

It is important for environmental protection to use waste materials effectively. In this work, we conducted fundamental researches on the application of carbonaceous materials from waste as a reducing agent in an ironmaking process. Carbonaceous materials from waste (carbonized municipal waste and carbonized woody biomass) were mixed with a hematite reagent. The mixtures were heated up at the temperatures of 1000-1200℃ in N_2 gas by using a thermo gravimetric analysis (TG) or a vertical tube electric furnace. As a result, however a reaction of the mixture sample using a graphite stagnated, a reaction of the mixture sample using the carbonized municipal waste and the carbonized woody biomass progressed without the reaction stagnating. This is because a reactivity of the carbonized municipal waste and the carbonized woody biomass is better than that of the graphite.