engleski

Numerical study on ladle baking process of oxy-fuel combustion

Oxy-fuel combustion technology is an advanced combustion method, which has many advantages such as high theoretical combustion temperature, low flue gas emission and enhanced heat transfer of gas radiation. This method also presents a good way for high temperature preheating. Ladle baking technology is widely used in the steel production proces s because the continuous casting of molten steel at high drawing speed and low superheat can be realized I t is favorable towards reduc ing the center segregation and other defects of the billet. However, the traditional air combustion ladle baking technolo gy has many disadvantages such as high energy consumption and serious pollution. In the present study, a three dimensional mathematical model has been built considering the oxy-fuel combustion and fluid flow coupled with heat transfer of the ladle baking process. Considering the difference between gas radiation in oxygen-enriched combustion compared to that in air-assisted combustion, a modified WSGGM model has been introduced and compared with the traditional model. At the same time, two methods of oxy-fuel combustion and air combustion have been studied, and the results show that the oxy- fuel combustion is more efficient and achieves fuel savings of 41.6%.

energy consumption ; oxy fuel combustion ; the modified WSGGM ; ladle baking ; numerical simulation heat transfer

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