Community Research and Development Information Service - CORDIS


Investigations have been carried out into ways to improve the energy content of process gas collected from the BOS converter. Extensive process studies have been carried out to improve the understanding of the gas evolution process particularly in the event of process disturbances such as ore and raw dolomite additions. Dynamic models of the various gas extraction systems have been developed and validated against process data. These models have been used extensively to test alternative control strategies.

A system has been developed to detect flaring at the converter mouth and ways of incorporating this information into the control scheme have been evaluated using simulations. A semi-automatic system based on flaring has been tested at the Corus UK Scunthorpe works. This worked well subjectively, but it was not possible to quantify any benefits. Simulations using flare data to adjust hood pressure setpoints have indicated a possible improvement of 4% in gas energy content.

A control system using calculated air ingress rates, based on gas analysis and flow rate data, has been developed at Voest-Alpine Stahl Linz using the simulation. This scheme was subsequently tested on plant and found to increase the energy content of the collected gas by an average of 8.8% over a one-week period. At Corus NL, equations have been developed to determine the probability of puffing (flaring) based on process parameters. A control scheme using this calculated value has been simulated and energy savings of more than 4% are indicated.

Additional information

Authors: CHOWN A, Corus UK Ltd, Middlesborough (GB);SNOEIJER B, Corus NL, IJmuiden (NL);HAIDER K, Voest-Alpine Stahl Linz GmbH, Linz (AT)
Bibliographic Reference: EUR 20205 EN (2002), pp.177. Euro: 26.50
Availability: EUR-OP reference: KI-NA-20205-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-6726-9
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