ISSN 2594-357X
35º Seminário de Redução de Minério de Ferro e Matérias-Primas — Vol. 01 , num. 35 (2005)
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Abstract
This paper mainly emphasizes development of a multi-fluid blast furnace model and its application to simulate several innovative ironmaking operations. At first, the development process and framework of the model are simply introduced. Then, model simulations on hydrogen bearer injection show that the enhancement of hydrogen reduction brings the improvement of furnace performance, especially for injection of natural gas and plastics. Total heat input shows obvious decrease due to the decrease in direct reduction, solution loss and Si transfer reactions. Also, another simulation shows that if carbon composite agglomerates are charged in the furnace thermal reserve zone temperature will obviously decrease, and the reduction of iron-bearing raw materials will be retarded. However, the efficiency of blast furnace is improved due to the decrease in heat requirements for solution loss, sinter reduction and silicon transfer reactions, and less heat outflow by top gas and wall heat loss. The final application is to investigate the performance of blast furnace under top gas recycling together with plastics injection, cold oxygen blasting and carbon composite agglomerates charging. The model predicted lower in-furnace temperature, extremely accelerated reduction speed, drastically decreased CO emission and remarkably enhanced heat efficiency. Thus, the blast furnace operation with super high efficiency can be achieved through the practical applications of these innovative technologies.
This paper mainly emphasizes development of a multi-fluid blast furnace model and its application to simulate several innovative ironmaking operations. At first, the development process and framework of the model are simply introduced. Then, model simulations on hydrogen bearer injection show that the enhancement of hydrogen reduction brings the improvement of furnace performance, especially for injection of natural gas and plastics. Total heat input shows obvious decrease due to the decrease in direct reduction, solution loss and Si transfer reactions. Also, another simulation shows that if carbon composite agglomerates are charged in the furnace thermal reserve zone temperature will obviously decrease, and the reduction of iron-bearing raw materials will be retarded. However, the efficiency of blast furnace is improved due to the decrease in heat requirements for solution loss, sinter reduction and silicon transfer reactions, and less heat outflow by top gas and wall heat loss. The final application is to investigate the performance of blast furnace under top gas recycling together with plastics injection, cold oxygen blasting and carbon composite agglomerates charging. The model predicted lower in-furnace temperature, extremely accelerated reduction speed, drastically decreased CO emission and remarkably enhanced heat efficiency. Thus, the blast furnace operation with super high efficiency can be achieved through the practical applications of these innovative technologies.
Keywords
Blast furnace, Innovative ironmaking technology, Multi-fluid model.
Blast furnace, Innovative ironmaking technology, Multi-fluid model.
How to cite
Yagi, Junichiro; Chu, Mansheng; Nogami, Hiroshi.
Numerical Analysis on Innovative Operations of Blast Furnace by Mathematical Model Based on Multi-Fluid Theory,
p. 177-187.
In: 35º Seminário de Redução de Minério de Ferro e Matérias-Primas,
São Paulo - SP, Brasil,
2005.
ISSN: 2594-357X, DOI 10.5151/2594-357x-35Red - 177-187
