Effect of the Main Feeding Belt Position on Burden Distribution during the Charging Process of Bell-less Top Blast Furnace with Two Parallel Hoppers

Xu, Wenxuan; Cheng, Shusen; Niu, Qun; Zhao, Guifeng

doi:10.2355/isijinternational.isijint-2017-003

Cited by 21 publications

(6 citation statements)

References 22 publications

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“…Comparing with the rectangular rotating chute at a same tilting angle, the deflection extent of particles in the semi-circular rotating chute is larger. In the literature [24], it is indicated that during the early 60 s of the charging process, the coke average diameter almost keeps stable. Then the coke average diameter increases gradually until the charging time reaches to 120 s approximately.…”

Section: Resultsmentioning

confidence: 99%

Effect of the cross-section shape of rotating chute on particle flow and burden distribution during the charging process of bell-less top blast furnace with two parallel hoppers

Cheng

Niu

et al. 2017

Ironmaking & Steelmaking

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To investigate the effects of the cross-section shape of rotating chute on the burden distribution of stock surface, the motion of particles during the charging process of blast furnace using two different types of rotating chute was calculated by discrete element method. The calculation result shows that the particle velocity at the outlet of the rectangular rotating chute is smaller than that at the outlet of the semi-circular rotating chute, and the heap apex of stock surface is closer to the centre of blast furnace when the rectangular rotating chute is used. The deviation of burden total volume distribution in the circumferential direction of stock surface when the burden is charged by the rectangular rotating chute and the semi-circular rotating chute is 0.075 and 0.126, respectively. It can be concluded that the rectangular rotating chute is beneficial for the uniform circumferential burden distribution.

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Section: Resultsmentioning

confidence: 99%

Effect of the cross-section shape of rotating chute on particle flow and burden distribution during the charging process of bell-less top blast furnace with two parallel hoppers

Cheng

Niu

et al. 2017

Ironmaking & Steelmaking

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“…For our purpose, mass flow would be the most ideal outcome, but studies have shown that the type of hopper used in simulation mainly results in funnel flow. [28][29][30] We use the profile shown in Fig. 5(a) and colour the particles (irrespective of whether they are pellets or sinter) according to the time in which they exit the hopper.…”

Section: Hopper Dischargingmentioning

confidence: 99%

Effect of Selective Pellet Loading on Burden Distribution and Blast Furnace Operations

et al. 2023

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Good permeability of the blast furnace bed is of paramount importance for stable operations of the same and to achieve it, controlled burden distribution is the key. While coke is primarily used to maintain permeability of the furnace bed (with the ferrous burden particles being considerably smaller), global calls for reducing CO 2 emissions substantially are pushing blast furnaces to consume lower amounts of the same. Considering this, other burden distribution methods must be explored to maximize permeability of the burden layer. To do so, efforts are made to control pellet dumping in the burden layer in such a way that it occupies more volume in the mid-radial portions away from the walls. Pellets being spherical in shape and having narrower size distributions than sinter offer more inter particle porosity. Discrete element method (DEM) simulations are used to study the effect of the delay in pellet loading time in the ferrous burden (composed of pellets and sinter) on the positioning in the hopper. This positioning is found to subsequently affect the hopper output constitution, which then affects the radial constitution of the ferrous burden layer. Delaying the pellet loading on the ferrous burden is found to delay emptying of the same from the hopper, resulting in more pellets occupying the mid-radial region of ferrous burden layer in the blast furnace. Based on the observations from simulations, trials are taken in blast furnace and relevant parameters are monitored to capture the effect of such a charging practice on operations.

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“…Ferrous oxides and coke are charged at the top in layers and the reducing gas generating in the lower par meets de-ascending burden, exchanging heat and mass with it. In the shaft region, the indirect reduction reactions are the most central ones [2][3][4][5][6]. The burden distribution in the blast furnace is important for maintaining smooth burden descent and efficient gas utilization.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the influence of pellet proportion on burden distribution in blast furnace

Zhao

Saxén

Liu³

et al. 2022

Ironmaking & Steelmaking

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A mathematical model of the upper part of a 1080 m 3 bell-less top blast furnace is established. The influence of the mass proportion of pellet on burden distribution and packed bed structure is analysed by the discrete element method. The results show that the radial segregation of the charge is affected by the pellet ratio: when the proportion of pellets increases from 20% to 40%, the angle of the pile decreases from 32.3°to 27.3°, while the bottom width of the pile increases, and the height and top width of the pile tend to decrease. Furthermore, with the increase of the proportion of pellets, the porosity of the packed bed tends to decrease. For the packed bed within 1 m from the furnace wall, the porosity tends to decrease from the edge to the centre.

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Effect of the Main Feeding Belt Position on Burden Distribution during the Charging Process of Bell-less Top Blast Furnace with Two Parallel Hoppers

Cited by 21 publications

References 22 publications

Effect of the cross-section shape of rotating chute on particle flow and burden distribution during the charging process of bell-less top blast furnace with two parallel hoppers

Effect of the cross-section shape of rotating chute on particle flow and burden distribution during the charging process of bell-less top blast furnace with two parallel hoppers

Effect of Selective Pellet Loading on Burden Distribution and Blast Furnace Operations

Numerical study on the influence of pellet proportion on burden distribution in blast furnace

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