Comparative Study on the Effect of Different Gas Types in Baking Regenerative Ladle
DOI:
https://doi.org/10.24425/afe.2025.153776Abstract
Regenerative high-temperature air combustion (HTAC) is currently the most effective technology for ladle preheating and baking. However, the impact of different gas types on regenerative ladle baking varies significantly. Thus, a comparative analysis of the effects of various gas types on ladle baking is essential for optimizing the HTAC process and identifying suitable gas alternatives for practical applications. This study specifically examines the baking of a 130 t ladle utilizing HTAC technology, with natural gas, coke-oven gas, and converter gas as fuel sources. The research compares the influence of these gas types on flame characteristics and temperature, focusing on their effects on the internal temperature and flow field within the ladle. The results indicate that natural gas, coke-oven gas, and converter gas produce flame lengths of 2.3 m, 2.6 m, and 2.83 m, respectively, after achieving stable combustion. Both natural gas and coke-oven gas demonstrate superior flame shapes and greater stability, resulting in faster ladle baking rates. The inner wall and bottom of the ladle can be heated to temperatures exceeding 1200 K using natural gas or coke-oven gas, whereas converter gas stabilizes at around 1100 K. Furthermore, the thermal efficiencies of the baking process are measured at 25.43%, 22.08%, and 7.97% for natural gas, coke-oven gas, and converter gas, respectively. Therefore, natural gas and coke-oven gas are viable alternatives to converter gas for heating steel ladles, effectively meeting the demands of industrial production.References
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