廃プラスチック高炉原料化技術のこれまでと将来展望(<特集>容器包装リサイクル法施行10年の歩み)

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For the purpose of environmental conservation and resource recycling, the injection of waste plastic into blast furnace has been developed as a substitute reducing agent for coke and pulverized coal. Firstly, the combustion and gasification behaviours of waste plastics have been studied using the raceway hot model and the actual blast furnace. From the results of plastics injection experiments, it was clarified that combustibility of coarse plastics in raceway was much different from that of pulverized coal. The combustion and gasification efficiency of waste plastics became higher with the increase of its particle size. The particle granulated hard showed a high combustion and gasification efficiency compared with the softly granulated particle and pulverized coal. Thus, it was concluded that the particle of waste plastics processed coarse and hard could be effectively utilized as a reducing agent in the blast furnace. In addition, the mixed granulation of waste woods and waste plastics was investigated, and the simultaneous injection of waste plastics and pulverized coal was also examined. It became clear that combustion and gasification efficiency of both were improved owing to adhesion effect. Then, the granulation process of waste plastics to fine particles and the dechlorination of PVC were developed to increase the injection rate into blast furnace. On the basis of the above mentioned results, the waste plastics injection facilities were installed in Keihin and Fukuyama works of JFE Steel and the waste plastics injection operation at blast furnace has been successfully carried out and contributed to the favorable recycling of waste plastics.
一般社団法人日本エネルギー学会の論文
2010-06-20

著者

有山達郎
東北大学多元物質科学研究所

廃プラスチック高炉原料化技術のこれまでと将来展望(<特集>容器包装リサイクル法施行10年の歩み)

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