Influence of Above Burden Probes in Blast Furnace on Centre Coke Charging and Subsequent Operational Stability

Chakrabarty, Arijit; Ohri, Rohan; Chaudhari, Ujjwal; Sahoo, Tejraj; Nag, Samik; Gupta, Ishwari Prasad

doi:10.1007/s40831-023-00765-3

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…At the same time, as the thick the coke layer increases, with an increase in the ore layer thickness, the homogen In the soft melt droplet layer, as the thickness of the coke layer increases, the skeleton effect of the coke strengthens, the permeability of the soft melt droplet layer improves, and the maximum pressure drop decreases. At the same time, as the thickness of the coke layer increases, with an increase in the ore layer thickness, the homogeneity of the ore coke weakens relative to the soft melting zone, the interaction between the ore coke weakens, and the softening and dripping temperatures both increase [23].…”

Section: Dripping Properties Of Molten Metalmentioning

confidence: 99%

Study on the High-Temperature Interaction between Coke and Iron Ores with Different Layer Thicknesses

Wang,

Du,

Diao

et al. 2024

Materials

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Coke plays a key role as the skeleton of the charge column in BF. The gas path formed by the coke layer in the BF has a decisive influence on gas permeability. At high temperatures, the interface between coke and ore undergoes a melting reaction of coke and a reduction reaction of ore. The better the reducibility of the ore, the more conducive it is to the coupling reaction of ore and coke. The melting loss reaction of coke becomes more intense, and the corresponding strength of coke will decrease, which will affect the permeability of the blast furnace and is not conducive to the smooth operation of the blast furnace. Especially with a deterioration in iron ore quality, BF operation faces severe challenges, which makes it necessary to find an effective way to strengthen BF operation. In this study, a melting-dropping furnace was used to develop and clarify the high-temperature interaction between coke and iron ores with different layer thicknesses. The influencing factors were studied by establishing a gas permeability mathematical model and observing the metallographic microscope images of samples after the coke solution loss reaction. The relationships between coke layer thickness, distribution of gas flow, and pressure drop were obtained. The results showed that, under certain conditions, the gas permeability property of a furnace burden has been improved after the coke layer thickness increased. Upon observing the size of coke particles at the interface reaction site, the degree of melting loss reaction can be determined. A smaller particle size indicates more melting loss reaction. A dripping eigenvalue for molten metal was introduced to evaluate the dynamic changes in the comprehensive dripping properties of molten metal of furnace burden, which showed that the dripping eigenvalue for the molten metal could deteriorate because of the unruly thickness and the coke layer thickness should be limited through considering the operational indicators of the blast furnace.

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Section: Dripping Properties Of Molten Metalmentioning

confidence: 99%

Study on the High-Temperature Interaction between Coke and Iron Ores with Different Layer Thicknesses

Wang,

Du,

Diao

et al. 2024

Materials

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Evolution Mechanism of Blast Furnace Cooling Plate Slag‐Hanging Behavior with Different Cooling System Structure

Zhang,

Tang,

Chu

et al. 2024

steel research int.

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Based on the 3D heat transfer numerical simulation model, the evolution mechanism of blast furnace cooling plate slag‐hanging behavior with different cooling system structures is analyzed. Cooling plate reduced by 20 mm will not affect its slag‐hanging behavior. Copper cooling plate is best suited for high heat load areas. The vertical spacing of cooling plate is extended by 200 mm, the uniformity of the slag layer decreases by 5%, and the temperature of cooling plate and refractory material increases by 11 and 50 °C. Cooling plate vertical spacing of 510 mm or less can ensure stable slag hanging in the blast furnace. When using a single refractory material, the average uniformity of the slag layer is 95%, 86%, and 79% for graphite brick, semigraphite brick, and sialon‐SiC brick, respectively. Si3N4‐SiC brick cannot operate properly in high heat load areas. The factory can consider setting 125 mm sialon‐SiC brick in the furnace; graphite brick is used outside the furnace lining. The slag layer is well distributed, and the average value of uniformity is about 90%. Even if the slag layer is fully dislodged, the hot surface temperature of the furnace lining is 785 °C, and it can be quickly reslag hanging.

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The Research on the Stability of the Burden Surface Shape During Adjustments to the Blast Furnace Charging Procedure

Di,

Yan,

Cheng

et al. 2024

Metall Mater Trans B

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Influence of Above Burden Probes in Blast Furnace on Centre Coke Charging and Subsequent Operational Stability

Cited by 3 publications

References 19 publications

Study on the High-Temperature Interaction between Coke and Iron Ores with Different Layer Thicknesses

Study on the High-Temperature Interaction between Coke and Iron Ores with Different Layer Thicknesses

Evolution Mechanism of Blast Furnace Cooling Plate Slag‐Hanging Behavior with Different Cooling System Structure

The Research on the Stability of the Burden Surface Shape During Adjustments to the Blast Furnace Charging Procedure

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