顶吹转炉内二次燃烧初期的一个数学模型

本文在对顶吹转炉内气体流动，燃烧，传热研究的基础之上，合理耦合了炉内液滴北生，运动及传热的模型，给出了一个较全面的描述炉内燃烧与传热的数学模型。应用该模型研究了美国常用的１８０ｔ Ｂａｓｉｃ Ｏｘｙｇｅｎ Ｆｕｒｎａｃｅｓ炉内二次燃烧初期泡沫渣还未大量形成的燃烧及传热情况，得出了这一时期不同的二次氧枪设计与炉内二次燃烧率及热量传输效率之间的关系。

A MATHEMATICAL MODEL OF POST-COMBUSTION AT THE INITIAL STAGE IN TOP-BLOWN CONVERTER

Based on the studies of the gas-flow, combustion and heat transfer in the top-blown converter, a general and coupling mathematical model has been proposed. The post-combustion ratio and heat-transfer efficiency in a 180t basic oxygen furnace (BOF) for the different design of oxygen lance were calculated by using this model. The obtained results are very important for understanding the post-combustion mechanism and improving the equipment of the post-combustion as well as raising the utilizing ratio of post-combustion heat. This model can be also extended to study the post-combustion at any time in the converter with a low foam slag layer.