ISSN 2594-357X
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Abstract
The thermal state is an important index to evaluate the blast furnace (BF) operation. Method of rapid and accurate real-time estimation of the thermal state has always been one of hot research topics. Although the measurements of hot metal temperature, silicon content and other indicators are used to judge the thermal state inside BF, it is difficult to be applied in practical production as a result of hard realtime detection. A method of forecasting the trend of theoretical combustion temperature (TCT) by using real-time detected gas utilization rate and coke ratio is developed in present work. Firstly the relationship between gas utilization rate and direct reduction rate is established based on the A.H.Pamm joint calculation method. Then the effect of gas utilization rate on coke ratio is calculated based on the relationship between direct reduction rate and coke ratio. Finally, according to the different value between the variation value of coke ratio which caused by gas utilization rate and the practical coke ratio, an new index which associates with gas utilization rate and coke ratio is proposed to predict the trend of TCT. It can be concluded that, as for a 4,747 m³ large-scale BF, the coke ratio decreases by 4.5 kg·(tHM)-1 while the gas utilization rate increases by 1%. The real-time estimating results of TCT are in good agreement with theoretical results, which indicates that the proposed method to forecast TCT in present work is applicable to be used in practical production.
The thermal state is an important index to evaluate the blast furnace (BF) operation. Method of rapid and accurate real-time estimation of the thermal state has always been one of hot research topics. Although the measurements of hot metal temperature, silicon content and other indicators are used to judge the thermal state inside BF, it is difficult to be applied in practical production as a result of hard realtime detection. A method of forecasting the trend of theoretical combustion temperature (TCT) by using real-time detected gas utilization rate and coke ratio is developed in present work. Firstly the relationship between gas utilization rate and direct reduction rate is established based on the A.H.Pamm joint calculation method. Then the effect of gas utilization rate on coke ratio is calculated based on the relationship between direct reduction rate and coke ratio. Finally, according to the different value between the variation value of coke ratio which caused by gas utilization rate and the practical coke ratio, an new index which associates with gas utilization rate and coke ratio is proposed to predict the trend of TCT. It can be concluded that, as for a 4,747 m³ large-scale BF, the coke ratio decreases by 4.5 kg·(tHM)-1 while the gas utilization rate increases by 1%. The real-time estimating results of TCT are in good agreement with theoretical results, which indicates that the proposed method to forecast TCT in present work is applicable to be used in practical production.
Keywords
Blast furnace; Gas utilization rate; Theoretical combustion temperature; Real-time estimate.
Blast furnace; Gas utilization rate; Theoretical combustion temperature; Real-time estimate.
How to refer
Shen, Wei;
Wu, Sheng-li;
Zhang, Li-hua;
Wu, Jie;
Xu, Jian;
Kou., Ming-yin.
REAL-TIME ESTIMATE OF BLAST FURNACE
THEORETICAL COMBUSTION TEMPERATURE BASED ON
THE VARIATION OF GAS UTILIZATION RATE AND COKE
RATIO
,
p. 366-372.
In: 42º Seminário de Redução de Minério de Ferro e Matérias-primas / 13º Seminário Brasileiro de Minério de Ferro / 6th International Congress on the Science and Technology of Ironmaking,
Rio de Jabeiro,
2012.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-22102
