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Content archived on 2024-04-15

BLAST FURNACE GAS PREHEATING.

Objective

THE AIM IS TO STUDY THE BOOSTING OF BLAST FURNACE GAS BY ITS PREHEATING TO HIGH TEMPERATURE (UP TO 100 CELSIUS DEGREES) USING ONE OF THE EXCHANGER TECHNOLOGY CURRENTLY DEVELOPED.
A study was carried out on a new continuous heat exchanger which should be capable of preheating the gases used in the steel industry to high temperatures (800 C to 1000 C). After a comparative study of several devices during the development stage, the Societe d'Etude de la Propulsion par Reaction (SEPR) exchanger was chosen. This is a monolitic ceramic exchanger with parallel channels.

Unfortunately, the experimental runs had to be prematurely stopped because of serious leakage problems. In spite of these technical difficulties, an interesting study was carried out into a new type of exchanger. The trials showed that clean air (ie without any combustion products) could be preheated to between 850 C and 900 C. Future developments of this technology can be expected with the development of new refractory materials.
THE STUDY WILL CONSIST OF THREE STEPS :

- PRELIMINARY STUDY OF EXCHANGER TECHNOLOGY - DEFINITION OF THE BEST AND MORE EFFICIENT TECHNOLOGY FOR BLAST FURNACE GAS PREHEATING.
- CONSTRUCTION OF THE TRIAL FURNACE PREHEATER, MOUNTED ON A 7 MW POWER FURNACE.
- EXPERIMENT ON TRIAL FURNACE. MEASUREMENT ON THE PREHEATER AND INSIDE THE FURNACE. MEASUREMENT OF TEMPERATURE, FLOW IN-OUT, FUME ANALYSIS.

Topic(s)

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Call for proposal

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Coordinator

Institut de Recherches de la Sidérurgie Française
EU contribution
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Address

57283 Maizières les Metz
France

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Total cost
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