Effect circumferential gas distribution on the dynamic characteristics of a blast furnace

Курунов, И. Ф.; Доброскок, Віталіна Олексіївна; Isteev, A. I.; Pleshkov, V. I.

doi:10.1007/bf01132741

Cited by 2 publications

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“…Information on dynamic characteristics of blast furnace thermal state control (by changing the silicon content in hot metal) enables to stabilize heating of the furnace hearth by means of control actions from the top (changing the ore load) and from the bottom (by changing the oxygen concentration in blast, natural gas flow rate and moisture amount in blast) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Blast Furnace Thermal State in Real-Time Operation

Спирин

Онорин

Истомин

2020

SSP

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The paper gives a general description of the dynamic model of the blast-furnace process that enables to calculate transition processes of the blast furnace thermal state, evaluated by the content of silicon in hot metal. It provides calculation results of the transition processes to be subjected to changes in control actions: ore load from the top and oxygen concentration in blast, natural gas flow rate and hot blast temperature from the bottom. Specific features of these transition processes during blast-furnace smelting are analyzed. The paper shows that the dynamic characteristics of blast furnaces change are subjected to control actions and depend significantly on properties of melted raw materials and operating parameters of blast furnaces. The oscillatory transition process in the blast furnace is observed in the case after disturbance it has an opposite influence on the thermal state of the lower and uppers stages of heat exchange. The paper presents prediction results of the silicon content in hot metal. It gives practical recommendations for selection of control actions.

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Section: Introductionmentioning

confidence: 99%

Prediction of Blast Furnace Thermal State in Real-Time Operation

Спирин

Онорин

Истомин

2020

SSP

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Design and Computational Fluid Dynamics Analysis of a Novel Compact Mixing Chamber in Blast Furnace Ironmaking

Dutta

2021

Journal of Thermal Science and Engineering Applications

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Homogeneous mixing of hot air from the hot blast stove with suitable quantity of cold air in a mixing chamber is very essential to maintain uniform temperature of hot air at all tuyers of a blast furnace. Proper design of the mixing chamber is very important for stable and efficient operation of blast furnace, lower energy consumption, and lower carbon dioxide emission. Comprehensive understanding of the physics of the mixing process is very essential for efficient design of the mixing chamber. In this paper CFD simulations are conducted to analyze the mixing of hot and cold air in a tangential cold gas inlet type and in a radial cold gas inlet type mixing chambers, which are commonly used in the industry. Results show that both types of mixing chamber produce very non-homogeneous mixture of cold and hot air despite having large mixing length in the long hot blast main. Also, design of a novel compact mixing chamber is presented and CFD analysis of this mixing chamber is conducted. The new mixing chamber is found to produce almost homogeneously mixed air stream within a very short length due to very high turbulence of the intensely swirling air flow. Also, the new mixing chamber is found to save large amount of high quality thermal energy, which is wasted in the other two designs through the wall of the long hot blast main.

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Effect circumferential gas distribution on the dynamic characteristics of a blast furnace

Cited by 2 publications

References 0 publications

Prediction of Blast Furnace Thermal State in Real-Time Operation

Prediction of Blast Furnace Thermal State in Real-Time Operation

Design and Computational Fluid Dynamics Analysis of a Novel Compact Mixing Chamber in Blast Furnace Ironmaking

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