76. Why is zinc ingot always added directly from both ends of the galvanizing pot?

The hot-dip galvanizing method using direct zinc ingot feeding involves placing 23-25 kg zinc ingots at both ends of the galvanizing pot. Since furnaces with bottom or side heating typically feature combustion chambers at the pot's top and bottom, the high-temperature zones are concentrated at these ends. This method allows the ingots to reach higher temperatures for melting. Given that the molten zinc at these zones is inherently hotter than the central portion, the ingots not only melt faster but also help balance the temperature difference between the two ends and the middle section. As practical experience suggests the temperature fluctuation should not exceed 2-3°C, zinc ingots are always fed directly from the high-temperature zones at the pot's ends.