Preheating scrap for charging into furnace - using heat energy in exhaust gases discharged from the furnace

Appareil a prechauffer une matiere destinee a etre introduite dans une installation de fabrication d'acier

  • Inventors: EIJI UDO
  • Assignees: Nikko Industry
  • Publication Date: April 16, 1982
  • Publication Number: FR-2492077-A1

Abstract

Appts.for preheating material to be charged into steel making equipment comprises a bypass duct connected to a dust collecting combustion chamber. A hood is fitted to the other end of the duct and is shiftable to the posn. of a preheating pit. A charging bucket is removably positioned in each pit and has an exhaust gas passage. A communicating duct joins the outlet duct of the combustion chamber with each preheating pit. Used for preheating scrap, alloy Fe, directly reduced Fe and lime for charging into an electric furnace. The heat energy of exhaust gas resulting from a steel making process is recovered from the combustion chamber through a bypass circuit and introduced into the charging bucket serving as a preheating chamber. The preheating removes water from the charge so as to avoid explosion accidents when charged into the furnace.
<P>L'APPAREIL COMPREND UN CONDUIT DE TRANSFERT 6 RELIE A UNE CHAMBRE COLLECTRICE DE POUSSIERE D'UNE INSTALLATION DE FABRICATION D'ACIER, UNE HOTTE 8 S'ADAPTANT AU CONDUIT 6 ET POUVANT ETRE AMENEE SELECTIVEMENT A LA POSITION DE L'UNE DE PLUSIEURS FOSSES DE PRECHAUFFAGE 31, UNE BENNE 19 PLACEE DE FACON AMOVIBLE DANS CHACUNE DE CES FOSSES ET PRESENTANT INTERIEUREMENT UN PASSAGE DE GAZ D'ECHAPPEMENT ET DANS LE BAS UN DISPOSITIF DE FOND OUVRANT 21, AINSI QU'UN CONDUIT DE COMMUNICATION 36 ENTRE CHACUNE DES FOSSES ET UN CONDUIT DE SORTIE 3 DE LA CHAMBRE DE COMBUSTION. ON PLACE DANS LA BENNE 19 LA MATIERE A INTRODUIRE DANS L'INSTALLATION DE FABRICATION D'ACIER ET ON LA PRECHAUFFE AU MOYEN DE GAZ D'ECHAPPEMENT VENANT DE LA CHAMBRE DE COMBUSTION. L'APPAREIL ASSURE UNE ECONOMIE D'ENERGIE, UNE MEILLEURE SECURITE ET UNE PLUS GRANDE EFFICACITE D'ECHANGE THERMIQUE.</P>

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    DE-2302012-B1March 28, 1974Verfahren und vorrichtung zum vorwaermen von schrott

NO-Patent Citations (0)

    Title

Cited By (2)

    Publication numberPublication dateAssigneeTitle
    FR-2807030-A1October 05, 2001Jean Georges DaveneProcede et installation de prefabrication directe d'elements en beton arme
    WO-03029500-A1April 10, 2003Jean Davene, Jacques BarbeIntegrated prefabrication of reinforced concrete elements including production of concrete reinforcing bars and upgrading of the slag produced