The Reason for Adding Zinc Ingots Directly into the Galvanizing Pot from Both Ends

The hot-dip galvanizing method that involves adding zinc ingots directly into the galvanizing pot consists of dropping individual zinc ingots, weighing approximately 23 to 25 kilograms, directly into the pot from both ends. This practice is adopted because, regardless of whether the furnace is bottom-heated or side-heated, the combustion chambers are generally located at the two tops of the galvanizing pot. Therefore, the high-temperature zones are located at the two ends. Adding zinc ingots from these locations allows the ingots to be subjected to higher temperatures and melt quickly. Since the temperature of the zinc liquid in the high-temperature zones is inherently higher than that in the middle, this not only accelerates the melting of the zinc ingots but also helps reduce the temperature of the zinc liquid at these two locations, bringing it closer to the temperature of the zinc liquid in the middle section and minimizing the temperature difference. Generally, based on experience, the temperature variation of the zinc liquid should not exceed 2 to 3°C. Therefore, zinc ingots are typically added directly into the high-temperature zones at both ends of the galvanizing pot.