2010
DOI: 10.1179/174328109x422566
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Burden distribution control and its optimisation under high pellet operation

Abstract: Gas distribution control under high pellet blast furnace (BF) burden operation is more difficult than with sinter due to low angle of repose, high rolling characteristics and layer collapse tendency. Also heavier pellets exert a pushing effect on the preceding coke layer thereby forcing coke towards wall with the pellets also rolling down towards the centre. High pellet proportion at the centre promotes high peripheral flow affecting the burden layer profile and process stability. In order to achieve accurate … Show more

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Cited by 18 publications
(14 citation statements)
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“…Accordingly, the performance (i.e., testing error) is sensitive to the combination of (C, σ). There is a sharp decrease when C and σ are in the range of ( 2 −15 ,2 5 ) and ( 2 −25 ,2 25 ) respectively. Then, with the increase of C, the testing error tends to be stable.…”
Section: A Production Indicators Modeling Experimentsmentioning
confidence: 99%
See 1 more Smart Citation
“…Accordingly, the performance (i.e., testing error) is sensitive to the combination of (C, σ). There is a sharp decrease when C and σ are in the range of ( 2 −15 ,2 5 ) and ( 2 −25 ,2 25 ) respectively. Then, with the increase of C, the testing error tends to be stable.…”
Section: A Production Indicators Modeling Experimentsmentioning
confidence: 99%
“…Thereinto, burden distribution scheme in the upper part of BF plays a crucial role in BF operation, which influences the gas flow distribution, and the utilization ratio of heat and chemical energy [3], [4]. Accordingly, the key to keep a smooth and stable operation environment is to form a proper burden surface, further it will achieve higher productivity, lower fuel rate and better quality of molten iron [5]. However, during the BF ironmaking process, many complicated chemical reactions and heat transport phenomena occur inside the furnace as the solid materials move downward and hot gases flow upward, so it is difficult to establish the mechanism model to accurately describe the effect of burden surface on the state of BF [6], [7].…”
Section: Introductionmentioning
confidence: 99%
“…The different characteristics of the burden layers, especially in the radial direction, lead to non-uniform gas distribution. Therefore, it is essential to ensure an appropriate radial distribution of the charge [7][8][9].…”
Section: Introductionmentioning
confidence: 99%
“…Conventionally, sinter is used as the major burden due to its physical, chemical and metallurgical properties. In addition, it is easier to control the burden distribution in the blast furnace throat with sinter compared to pellets [7,[21][22][23] since the small and round shape and high density of pellets make this raw material more prone to roll on the burden surface and percolate into the void between larger (coke) particles [24]. However, since the sintering process also causes serious environmental pollution, many iron and steel enterprises have recently restricted the sintering production, so it has become a common trend to increase the proportion of pellets in the burden structure of blast furnace.…”
Section: Introductionmentioning
confidence: 99%
“…8,9) Various schemes have been suggested to prevent the collapse, for example creating a coke plateau near the wall and controlling the particle trajectory. 10,11) Some other schemes have used it to their advantage to achieve a central working furnace. 12,13) It is hard to ascertain the effect of the charging a layer on the underlying layers as it is difficult to measure the underlying profile after the new layer has been charged.…”
Section: Introductionmentioning
confidence: 99%