The heating of a new galvanizing pot must be slow and even. The temperature of the entire pot must be balanced, i.e. the maximum temperature of the inside of the pot must be less than 480°C, the temperature difference between the pot and the bottom must be less than 100°C, and the temperature difference between the inside and outside of the pot must be less than 50°C. The required heating time should be determined by the size and geometry of the pot and the zinc capacity. Before heating up, a heating curve chart and table must be drawn up to meet the actual situation, and temperature control and work records must be kept at the same time.
During the heating up process, the overall temperature of the galvanizing pot must be balanced, especially to prevent local high temperature so that the thermal expansion is fully released. When the temperature rise reaches 120℃, there should be a constant temperature stage of 6 hours, when the temperature section is to allow the water in the kiln bricks to be fully evaporated; when the temperature rise reaches 300℃, there should be a constant temperature arrangement of 24 hours. The temperature rise should not be more than 6℃ per hour; Above 300℃, it can be faster, but it should not exceed 8℃ per hour until the working temperature.It must be ensured that the critical control temperature should not be exceeded at any time.