According to the heating method, it can be divided into steam heating jacketed pot and electric heating jacketed pot. The selection of steam heating jacketed pot is designed according to the heating temperature requirements of materials or the size of steam pressure. The required thickness of the steel plate is thicker. The electric heating jacketed pot does not have the problem of pressure, but the electric heating jacketed pot consumes a lot of electricity, which is relatively not very energy-saving. Electric heating is suitable for industrial enterprises without steam boilers.