加热炉的分类:

按炉型结构分类：有箱式炉、立式炉等。 按燃烧形式分类：底烧式炉、侧烧式炉。 按供风形式分类：强制供风炉、自然供风 .

Classification of heating furnace:

According to the type of furnace type structure, there are box type furnace, vertical furnace and so on. According to the form of combustion, the bottom burning furnace and the side burning furnace. Classification according to the form of air supply: forced air supply furnace and natural supply wind.

在使燃料能完全燃烧的情况下希望空气过剩系数越低越好。但过低可能造成燃烧不完全，而过高将增加了炉内空气量，降低炉子的热效率，对于强制通风或引风，还将增加动力消耗，烟气中的氧含量过多也将增加对炉管和其他部件的损失。

It is hoped that the higher the air surplus coefficient, the better the fuel can be completely burned. But too low may cause incomplete combustion, and too high will increase the volume of air in the furnace and reduce the thermal efficiency of the furnace. For forced ventilation or induced draught, it will also increase power c***umption and excessive oxygen content in the flue gas will also increase the loss of furnace tubes and other components.

对流传热：对流传热是炉气与钢材表面接触时的热交换过程，包括炉气各部分发生位移所产生的对流作用及炉气分子之间的导热作用。

Convective heat transfer: convection heat transfer is the heat exchange process of the contact between the furnace gas and the steel surface, including the convection of the displacement of each part of the furnace gas and the heat conduction between the molecules of the furnace gas.