単一微粉炭粒子の燃焼メカニズムおよび燃焼率の向上方法

抄録

For keeping stable operation in PCI (pulverized coal injection) operation of blast furnace (BF), it is important to make clear the combustion mechanism of pulverized coal (PC). In this paper, combustion behavior of a single PC particle was investigated. Improvement of combustion efficiency of PC can be made by effective oxygen supply, because the combustion rate was controlled by oxygen diffusion.
As a new method to improve combustion efficiency, addition of oxidizing agent, was investigated. In present work, KMnO₄ solution was used as the oxidizing agent. It was confirmed that the burning time can he shorten with the increase of KMnO₄ concentration. The addition of oxidizing agent which improves PC combustion can bring great advantage for larger size PC injection.