A static approach towards coke collapse modelling in blast furnace

Authors: Nag, S.¹; Basu, S.²; Yu, A.B.²

Source: Ironmaking & Steelmaking, Volume 36, Number 7, October 2009 , pp. 509-514(6)

Publisher: Maney Publishing

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Abstract:

Burden distribution control in a blast furnace has a close relationship with wind acceptance and gas utilisation. Quantification of radial distribution of ore and coke is important for proper control of blast furnace operation. Charging of metallic burden over a layer of coke causes a portion of the coke layer to get dislodged from its original position, similar to the situation observed when a heavy material is dropped on a bed of lighter particles. This phenomenon, designated 'coke collapse', significantly changes the ore/coke distribution in the radial direction and thus affects the permeability of the furnace shaft. In the present work a mathematical model for quantifying the amount of coke collapse has been proposed on the basis of 'stability of slope theory'. The calculation from this model has been compared with the results from experiments in simplified physical models. Predictions of the mathematical model are in good agreement with experimental results.

Keywords: BLAST FURNACE; BURDEN DISTRIBUTION; GAS DISTRIBUTION; ORE/COKE RATIO; COKE COLLAPSE

Document Type: Research article

DOI: 10.1179/174328109X443338

Affiliations: 1: Tata Steel Limited, Jamshedpur, 831001, India;, Email: samiknag@tatasteel.com 2: Tata Steel Limited, Jamshedpur, 831001, India

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