Carbon content and temperature prediction of molten pool based on converter gas analysis

As early as the 1980s, foreign iron and steel companies have already used flue gas analysis technology to guide actual production. The dynamic prediction model of carbon content in the converter bath is established by continuously collecting smoke information from the flue gas analyzer and establishing a mathematical model using carbon balance. As the smelting environment of the converter bath is complex and changeable, the detection and judgment of the bath temperature has always been the key and difficult point to be overcome in the smelting process. At present, most of the steel mills in China still control the smelting process of the converter with experience or static control, and the temperature hit rate is low.
Hebei Union University scholars based on flue gas analysis to obtain the flue gas flow and composition, the application of carbon balance principle to build the carbon integral mathematical model can dynamically predict the carbon content in the molten pool; furnace gas information delay, furnace gas volume, gun position coefficient and The correction of the decarburization rate inflection points A and B can improve the precision of the dynamic prediction of the carbon content in the molten pool. Based on the dynamic prediction of carbon content in the molten pool, a dynamic temperature prediction model of the molten pool was constructed based on the theory of thermal balance and the thermodynamics of carbon and oxygen reaction. The correction of the decarburization rate inflection points A and B and the construction of the staged model can increase the temperature of the bath. Forecast accuracy. Based on this, the VISUAL BASIC 6.0 and SQL SERVER 2000 databases were used to build a dynamic prediction system for the carbon content and temperature of the molten pool. The system was used to run off-line 46-furnace smelting data for a certain period of time. The results showed that the endpoint W(C)< At 0.2%, the prediction deviation was less than 0.02%, and the hit rate was 84.8%. The model endpoint temperature deviation was less than 20°C. The hit rate was 84.8%, and the CT double hit rate was 73.9%, basically meeting the smelting requirement for the final hit rate.

Semi Coke

The production of semi-coke is mostly based on low-temperature dry distillation, and the dry distillation temperature is generally around 600 ℃. Due to the late start, the annual output of a single furnace of semi-coke low-temperature dry distillation equipment is mostly around 30,000 tons/year, and 50,000 tons/year The low-temperature dry distillation furnace equipment of the above scale is still in the exploration and test stage, and the technical process of large-scale equipment is still immature. Only one furnace and multiple doors and other combined technologies can be used to achieve centralized large-scale production.

Semi Coke, Petroleum Coke, Metallurgical Coke, smelting coke.

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