使用済みプラスチック高炉原料化技術の進展(<総説特集>使用済みプラスチックのリサイクル技術の現状)

概要

論文の詳細を見る
To contribute to the effective recycling of materials for the benefit of the global environment, the utilization of waste plastics as injectant for blast furnaces is urgently desired. JFE Steel has developed and installed waste plastics recycling process at East Japan and West Japan works in 2000. On the basis of the experimental results by raceway hot model, simultaneous injection was investigated and the combustibility of plastics was enhanced because the combustion heat of the adhered pulverized coal promoted the gasification rate of the plastics. To increase the hardness of plastics, technology for combined agglomeration of the plastics with CaCO3 has been developed and it was confirmed that the strength of granulated plastics doubled in comparison with normal plastics. CaCO_3 also had the effect of lowering the melting temperature of the raceway-shell by assimilation. Simultaneous injection and combined agglomeration technologies have been successfully introduced at an actual blast furnace, resulting in a remarkable decrease in the RAR (Reducing Agent Rate) and the permeability in the lower part.
一般社団法人日本エネルギー学会の論文
2007-11-20