ISSN 2594-357X
34º Seminário de Redução de Minério de Ferro e Matérias-Primas — Vol. 01 , num. 34 (2004)
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The ironmaking blast furnace is a counter current chemical reactor whose main purpose is to produce hot metal from iron oxides. In the furnace, six phases: gas, lump solids (iron ore, sinter, pellets and coke), liquids (pig iron and molten slag) and powders (tuyere injectants: pulverized coal, coke fines or dust from the lump coke) interact with one another. A comprehensive three-dimensional transient mathematical model has been developed based on the multi-fluid theory. The model was composed of conservation equations of mass, momentum, chemical species and thermal energy for each phase mentioned above. This model includes phase transformations and chemical reactions such as melting of pig iron and slag components, moisture evaporation, reduction of iron oxides, solution loss, coke and pulverized coal combustion, silica reduction and gas phase reactions. By using this model, transient behaviors of the blast furnace process and its reactor performance have been successfully predicted. The mathematical model has been applied to develop a super-high efficiency blast furnace process. For this purpose carbon composite hot briquette charging and low melting temperature operations were evaluated resulting in significant improvement of productivity and energy consumption.
The ironmaking blast furnace is a counter current chemical reactor whose main purpose is to produce hot metal from iron oxides. In the furnace, six phases: gas, lump solids (iron ore, sinter, pellets and coke), liquids (pig iron and molten slag) and powders (tuyere injectants: pulverized coal, coke fines or dust from the lump coke) interact with one another. A comprehensive three-dimensional transient mathematical model has been developed based on the multi-fluid theory. The model was composed of conservation equations of mass, momentum, chemical species and thermal energy for each phase mentioned above. This model includes phase transformations and chemical reactions such as melting of pig iron and slag components, moisture evaporation, reduction of iron oxides, solution loss, coke and pulverized coal combustion, silica reduction and gas phase reactions. By using this model, transient behaviors of the blast furnace process and its reactor performance have been successfully predicted. The mathematical model has been applied to develop a super-high efficiency blast furnace process. For this purpose carbon composite hot briquette charging and low melting temperature operations were evaluated resulting in significant improvement of productivity and energy consumption.
Keywords
blast furnace, mathematical modeling, multi-fluid theory, pulverized coal injection, transient behavior, chemical reaction, phase transformation, thermal reserve zone, low temperature melting, carbon composite briquette
blast furnace, mathematical modeling, multi-fluid theory, pulverized coal injection, transient behavior, chemical reaction, phase transformation, thermal reserve zone, low temperature melting, carbon composite briquette
How to cite
Yagi, Junichiro.
Furnace Modeling and Its Application to Propose New Operations,
p. 751-760.
In: 34º Seminário de Redução de Minério de Ferro e Matérias-Primas,
None,
2004.
ISSN: 2594-357X, DOI 10.5151/2594-357x-34Red-751-760
