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HomeDetermination of the coke bed voidage in the blast furnace hearth
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The objectives of the research consist of developing and applying techniques and model tools allowing an online evaluation of the blast furnace hearth conditions and mainly its permeability, in order to guarantee a stable furnace operation and to control the refractory wear through early corrective actions. CRM determined the coke bed voidage in the hearth of BFB of Cockerill-Sambre by two techniques: one based on pressure measurement inside the taphole and the other based on electromotive force measurement. To get a better understanding of the data, a mathematical model was developed taking into account the movements of the deadman. ln order to continuously determine the hot metal flow rate, BFI measured the filling level in the runner at BF 2 of TKS. A statistical wear model evaluated the cross-sectional runner geometry. The data have been fed into a model to calculate the coke bed voidage on multiple taphole blast furnaces. To control the wear caused by preferential liquid flow, Corus IJmuiden developed a monitoring of temperature and heat flux information from purpose-installed duplex thermocouples. This information has been correlated over time to identify any persistent trends and used to evaluate control measures such as blocked tuyères and process shutdowns. Industrial trials at Fos BF1, consisting of temperature profile measurements along the tuyère axis, radioactive tracer experiments and coke core borings, enabled IRSID to propose a picture for the description of the effects of the central coke charging practice. Moreover, IRSID used the Fluent code ta describe the liquid flow in the hearth with regard to the deadman conditions and to simulate tracer experiments. From studies of the behaviour of the hearth skull, Corus UK proposed a method for its monitoring. The iron flow rate was measured by using strain gauges attached to the torpedo ladles, and the slag flow rate was estimated from the slag pelletiser current. Data from tuyère core drilling samples were examined to estimate the voidage in the hearth.
- Published:
- Corporate author(s): CRM Centre de Recherches Métallurgiques (BE) , Directorate-General for Research and Innovation (European Commission) , IRSID Institut de Recherches de la Sidérurgie Française (FR) , ThyssenKrupp (DE)
- Personal author(s): Havelange, O ; Venturini, M. J ; Danloy, G
- Themes: Industrial research and development
- Subject: applied research , iron , iron and steel industry , iron and steel-working machinery , iron ore , metalworking , steel
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| ISSN | ISBN 92-894-7492-0 | DOI | Catalogue number KI-NA-20-942-EN-S |
- Released on EU publications website:
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