Ndedzipi mhando dze tube heating furnaces?

1. Cylindrical furnace: including pure radiant cylindrical furnace and convection-radiative cylindrical furnace, the hearth of which is cylindrical.

2. Vertical furnace: its furnace is a rectangular box, and the furnace tube can be placed horizontally or vertically. Including horizontal tube vertical furnace and riser vertical furnace.

3. Other types of heating furnaces: including box furnaces, inclined top furnaces and pure convection furnaces.