Why are zinc ingots always added directly from both ends of the galvanizing pot?

In the hot-dip galvanizing process where zinc ingots are directly added to the galvanizing pot, zinc ingots weighing approximately 23 to 25 kilograms each are thrown directly into the pot from both ends. This is because, regardless of whether the furnace is bottom-heated or side-heated, the combustion chambers are basically located at the two tops of the galvanizing pot. Therefore, the high-temperature zones are located at both ends, and adding zinc ingots from here allows the ingots to be exposed to higher temperatures and melt. Since the temperature of the molten zinc in the high-temperature zones is inherently higher than that in the middle, this not only melts the zinc ingots faster but also helps to reduce the temperature of the molten zinc in these two zones, bringing it closer to the temperature of the molten zinc in the middle section. At least, it minimizes the temperature difference. Based on general experience, the temperature deviation of the molten zinc should not exceed 2 to 3°C. Therefore, zinc ingots are generally always added directly from the high-temperature zones at both ends of the galvanizing pot.