Continuous heating furnaces include push steel furnace, walking furnace, rotary bottom furnace, chamber furnace and other continuous heating furnaces, but it is customary to refer to push steel furnace.

Most of the continuous heating furnaces are used for heating metal billets before rolling, and a few are used for forging and heat treatment.

The main features are: the billet moves continuously in the furnace according to the capacity of rolling, and the furnace gas flows continuously in the furnace; In general, under the condition that the section size, variety and output of the charge are unchanged, the temperature of each part of the furnace and the temperature of the metal in the furnace basically do not change with time, but only along the length of the furnace.