Description: Das Projekt "Entwicklung eines umweltfreundlichen Waermebehandlungsverfahrens fuer die Herstellung von Hochtechnologie-Stahldraehten" wird vom Umweltbundesamt gefördert und von ISPAT Hamburger Stahlwerke durchgeführt. General Information: Small gauge high carbon content steel wires are produced through successive drawing operations that reduce wire cross section up to 1000 times and more for instance from 5.5 to 0.18 mm). This very delicate process requires one or two intermediate heat treatments in order to re-form the original well proportioned microstructure of the wire, so enabling the material to withstand the final extreme grain elongation that is necessary to get the very high mechanical resistance required by the market to the final product (3.200 - 3.300 Mpa). The heat treatment consists in: - Phase a) heating up the wires up to +/- 1000 C. - Phase b) abrupt cooling down of the wires up to 550-600 C. The very high working temperatures makes this process very critical in terms of energy consumption and efficiency. The standard technology is actually based on 'open fire furnaces' (phase a) and 'lead baths' (phase b), pushing the industries to try different ways of process including the technology of 'fluidized beds' for potenting (phase b) in view of the potential damages produced to the environment and to the operators by the use of big quantities of lead. Nevertheless, the fluidized bed technology cannot actually guarantee heat transfer coefficients as high as those obtained with the use of the lead and is not very well accepted. HEATWIRE objectives and mains expected innovations are then related to: Objectives: - reduction of energy consumption between 30 per cent and 40 per cent; - increasing of efficiency in the use of energy up to 40 per cent.; - final removal of 'lead bath' technology with consequent positive impaction the environmental and user's health with the new FIB technology; - constant heat transfer coefficients and constant values of process parameters within the equipment; - increase of wire strength up to 10-20 per cent with consequent reduction of tyre steel content. This should lead to a potential saving of car fuel and toxic emissions. Innovations: - new compact high efficiency equipment with constant heat transfer coefficients. The new furnace will be based on an optimized fluidized bed technology; - implementation of an integrated monitoring system capable of keeping the process under control; - determination of the optimum thermic cycle relevant to the high carbon steels(0.7 and 0.8 per cent C) being used; - capability of reproducing (production level) a specified thermic cycle, so getting mechanical characteristics of the final wire within very little tolerances. The application of the new technology would lead to an expected energy saving of approximately 1.2 x 10 6 MJ only for the European lines. In addition, the increased resistance of the final product (steel cord), would lead to a lower tyre weight and a consequent reduction of toxic emissions. Prime Contractor: Le Four Industriel Belge S.A.; Bruxelles/Belgium.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Fossiler Brennstoff ? Hitzeresistenz ? Brennstoff ? Getreide ? Stahlindustrie ? Werkstoff ? Kohlenstoffgehalt ? Main ? Blei ? Integrated Monitoring ? Offenes Feuer ? Gewährleistung ? Fahrzeugreifen ? Aufbereitungstechnik ? Verfahrensparameter ? Wirbelschicht ? Wärmeeffizienz ? Wärmemarkt ? Verfahrenstechnik ? Energieverbrauch ? Umwelthygiene ? Innovation ? Wärmetechnik ? Kohlenstoffkreislauf ? Wirbelschichtfeuerung ? Zwischenprodukt ? Monitoring ? Emissionsminderung ? Stahl ? Thermisches Verfahren ? Energieeinsparung ? Produktionstechnik ? Energienutzung ? Heizung ? Umweltfreundliche Technologie ? Physikalische Größe ? Ofen ? Schadstoffminderung ? other energy topics ? Betriebsparameter ? renewable sources of energy ?
Region: Hamburg
Bounding box: 9.99302° .. 9.99302° x 53.55073° .. 53.55073°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1998-01-01 - 2000-12-31
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