Community Research and Development Information Service - CORDIS


Heat recovery possibilities in a cast iron melting furnace were studied by TEKSID. At 40 tonne steel/hour a cupola furnace produces 25000 Nm**3/h of flue gases with 16-22% CO. After heat losses at the chimney, the recoverable heat is about 12.4-10**6 kcal/h, mainly combustion heat in CO. This study shows that the heat is usable for electricity production which will be used at the plant. 87 kWh of electricity can be recovered per tonne of steel produced with the aid of a steam turbine driven generator of 3.5 MW. The combustion of the low calorific gas (approximately 400 kcal/Nm**3) gave positive results: wet CO gas can be burnt without methane added and air preheated. The pilot plant consisting of combustion chamber and equipment to produce and condense steam without turbine and generator was built and run satisfactorily. Fouling problems due to residual dust, necessitated extending the research to include impurified gases (contract EE-B-2-163-I). The aim is to observe type and intensity of fouling, study cleaning systems, frequency of intervention and maintenance costs, and the degree of spontaneous separation of dusts. Initial cost estimates suggest that electricity thus produced will be cheaper than conventionally produced electricity. Of environmental benefit, furthermore, is the burning of the CO.

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Bibliographic Reference: EUR 10524 EN (1986) MF, 77 P., BFR 150, BLOW-UP COPY BFR 400, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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