Multistage combustor, molten steel tank preheating equipment and application method thereof

Abstract

The invention relates to the field of molten steel tank preheating equipment, in particular to a multistage combustor, molten steel tank preheating equipment and an application method thereof. The combustor comprises a combustor main body; the combustor main body is provided with an intake pipe for gas feeding; the combustor main body is provided with a combustion chamber for gas and oxygen combustion; the combustion chamber comprises a combustion chamber nozzle; the combustion chamber nozzle communicates with the outer side surface of the combustor main body; and the combustor main body is provided with an ignition gun for ignition. The invention discloses the multistage combustor structure; the structure of the combustor is optimized; and pure oxygen is adopted to replace air as the combustion assisting medium, so that the heat loss caused by participation of nitrogen and inert gas in the air in the heat exchange is reduced, and the system heat efficiency and the molten steel tank heating speed can be greatly improved.

Description

Technical field [0001] The invention relates to the field of molten steel tank preheating equipment, in particular to a multi-stage burner, a molten steel tank preheating equipment and a use method thereof. Background technique [0002] At present, the preheating of molten steel tanks mainly has the following problems: the current air-assisted baking burner flame has no rigidity, and the flame is mainly concentrated in the upper half of the molten steel tank, which cannot effectively transfer heat to the bottom of the molten steel tank, and the temperature uniformity in the ladle is poor; The on-site operators feedback that the current baking temperature of the molten steel tank is about 600℃ on average, and the heat storage in the ladle is low. After the molten steel enters the ladle, the temperature of the molten steel drops greatly, so the tapping temperature is higher; the baking operation time of the turnover molten steel tank is long , Resulting in a large number of turnove...

AI Technical Summary

Problems solved by technology

[0002] At present, there are mainly the following problems in the preheating of the molten steel tank: the flame of the current air-assisted combustion baking burner has no stiffness, and the flame is mainly concentrated in the upper half of the molten steel tank, which cannot effectively transfer heat to the bottom of the molten steel tank, and the temperature uniformity in the ladle is poor; according to Feedback from on-site operators shows that the current average baking temperature of molten steel tanks is about 600°C, and the heat stored in the ladle is low. After the molten steel is put into the ladle, the temperature of molten steel drops greatly, so the requirement for tapping temperature is high; the baking operation time of the turnover steel tank is long , resulting in a large number of turnover packages; the number of turnover steel tanks participating in the production is as many as 30 sets, and the capital occupation, maintenance costs and management costs are high

Images