1.概述 近年来,由于压缩烧油,已有部分轧钢加热炉改烧粉煤。它与燃烧气体和液体燃料的加热炉有所不同,粉煤在管道中输送需要热风,输送用的热风——一次风占总风量的20～30％。生产实践表明,一次风温为150～200℃较好;其余的热风——二次风予热温度不限,越高越好。其次,粉煤加热炉的炉气中含有大量灰尘。这些灰尘随炉气带入炉膛,其中部分落在炉膛和钢坯表面 1. Overview In recent years, due to the compression of oil burning, some have been turning furnace rolling pulverized coal. It is different from the heating furnace for burning gas and liquid fuel. The pulverized coal needs hot air to be transported in the pipeline. The hot air used for transportation - the primary air accounts for 20 to 30% of the total air volume. Production practice shows that the first air temperature is 150 ~ 200 ℃ better; the rest of the hot air - the second air temperature is not limited, the higher the better. Second, the furnace gas furnace contains a lot of dust. The dust is brought into the furnace with the furnace gas, some of which fall on the surface of the hearth and billet