Development of Burden Distribution Simulation Model for Bell-less Top in a Large Blast Furnace and Its Application.

Hattori, Michinori; Iino, Bungo; Shimomura, Akio; Tsukiji, Hideaki; Ariyama, Tatsuro

doi:10.2355/isijinternational.33.1070

Cited by 38 publications

(24 citation statements)

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“…[1][2][3][4] The development of reduce and real scale models that allow to see how the burden should behave inside the blast furnace, are an important part of these studies. [5][6][7] These models try to reproduce main features of the blast furnace and show themselves as an useful tool to elucidate the best ways to distribute the burden. After testing a charging method in the model, this may be applied in the real blast furnace knowing its behaviour beforehand.…”

Section: Introductionmentioning

confidence: 99%

Burden Distribution Analysis by Digital Image Processing in a Scale Model of a Blast Furnace Shaft.

et al. 2000

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During the realigning of Aceralia's blast furnace B in Gijon, a 1/10 scale half-section, three-dimensional cold model of the BF shaft was built to test charging patterns and the effect of gas flow in burden distribution. The front side of this half model is closed by a methacrylate sheet that allows images of the burden distribution inside the model to be obtained, during and after the charging process. Image processing techniques were applied to obtain useful information from burden profile images. A complete study of a charging pattern is presented in this paper.The model has allowed study of some local effects of gas flow in burden distribution, such as changes in the final coke layer during ore charging, and the formation of a narrow window in the centre of the model that connects the successive coke layers.

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Section: Introductionmentioning

confidence: 99%

Burden Distribution Analysis by Digital Image Processing in a Scale Model of a Blast Furnace Shaft.

et al. 2000

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“…Compared with physical experiments, mathematical modeling [3] has gained popularity due to its lower cost and higher flexibility. The mathematical modeling approaches [4,5] regarding the BF burden distribution (corresponding to the bell-less charging system) can basically be categorized as volume-based simplified models or classical (continuum) force models [6][7][8][9][10][11][12][13][14], data-driven models [15,16], or hybrid models [17,18], as well as the more computationally expensive models based of the discrete element method (DEM) [19][20][21][22][23]. Among these models, the classical force model has advantages in terms of its simple model formulation and fast computation, which are readily suitable for online implementation.…”

Section: Introductionmentioning

confidence: 99%

Model-Based Analysis of Factors Affecting the Burden Layer Structure in the Blast Furnace Shaft

Saxén

Liu

et al. 2019

Metals

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The distribution of burden layers in an ironmaking blast furnace strongly influences the conditions in the upper part of the process. The bed permeability largely depends on the distribution of ore and coke in the lumpy zone, which affects the radial gas flow distribution in the shaft. Along with the continuous advancement of technology, more information about the internal conditions of the blast furnace can be obtained through advanced measurement equipment, including 2D profiles and 3D surface maps of the top burden surface. However, the change of layer structure along with the burden descent cannot be directly measured. A mathematical model predicting the burden distribution and the internal layer structure during the descending process is established in this paper. The accuracy of the burden distribution model is verified by a comparison with experimental results. A sensitivity study was undertaken to clarify the role of some factors on the arising layer distribution, including the descent-rate distribution, the initial burden surface profile, and the charging direction through the charging matrix. The findings can be used as a theoretical basis to guide plant operations for optimizing the charging.

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“…In this experiment, the Froude number, which is the ratio of inertia to gravity, was matched with that of the actual blast furnace, and the charging rate and rotation speed (39.0 rpm) were decided based on the actual charging conditions. 21,22) The furnace body has 12 holes in the lower part for air blowing during charging, and an electric feeder was set under furnace body to simulate burden descent. Air is blown into the lower shaft to simulate the inclination of the burden surface while the materials are being charged.…”

Section: Introductionmentioning

confidence: 99%

Development of New Charging Technique for Mixing Coke in Ore Layer at Blast Furnace with Center Feed Type Bell-less Top

Kashihara¹,

Iwai²,

Ishiwata³

et al. 2017

ISIJ Int.

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Improved permeability and increased gas utilization have been desired in order to achieve low coke rate operation of blast furnaces. Coke mixed charging in the ore layer is one of the effective measures for realizing these improvements. A new charging technique for mixing small coke in the ore layer at a blast furnace with a center feed type bell-less top was developed and investigated in an experiment with a 1/18.8 scale model of an actual blast furnace at JFE Steel. By the new charging technique that small coke was charged in the determined port of the upper bunker before ore was charged in the upper bunker, the discharge pattern of the mixed small coke discharged from the bell-less top was improved, and the radial distribution of the mixed small coke ratio at the furnace top after the mixed materials were charged in the blast furnace was also improved. The new charging technique was applied to an actual blast furnace at JFE Steel, and improvement of gas permeability and a decrease in the coke rate were confirmed.

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Development of Burden Distribution Simulation Model for Bell-less Top in a Large Blast Furnace and Its Application.

Cited by 38 publications

References 0 publications

Burden Distribution Analysis by Digital Image Processing in a Scale Model of a Blast Furnace Shaft.

Burden Distribution Analysis by Digital Image Processing in a Scale Model of a Blast Furnace Shaft.

Model-Based Analysis of Factors Affecting the Burden Layer Structure in the Blast Furnace Shaft

Development of New Charging Technique for Mixing Coke in Ore Layer at Blast Furnace with Center Feed Type Bell-less Top

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