DE1282040B - Process for operating chamberless furnaces for melting steel - Google Patents

Process for operating chamberless furnaces for melting steel

Info

Publication number
DE1282040B
DE1282040B DER37798A DER0037798A DE1282040B DE 1282040 B DE1282040 B DE 1282040B DE R37798 A DER37798 A DE R37798A DE R0037798 A DER0037798 A DE R0037798A DE 1282040 B DE1282040 B DE 1282040B
Authority
DE
Germany
Prior art keywords
furnace
chamberless
operating
furnaces
exhaust gases
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DER37798A
Other languages
German (de)
Inventor
Dr-Ing Walter Hess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheinische Stahlwerke
Original Assignee
Rheinische Stahlwerke
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rheinische Stahlwerke filed Critical Rheinische Stahlwerke
Priority to DER37798A priority Critical patent/DE1282040B/en
Publication of DE1282040B publication Critical patent/DE1282040B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/562—Manufacture of steel by other methods starting from scrap
    • C21C5/565—Preheating of scrap
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

Verfahren zum Betreiben von kammerlosen Schmelzöfen zum Schmelzen von Stahl Die Patentanmeldung R 35756 VI a / 18b betrifft eine Ofenanlage, der zufolge die fühlbare Wärme der Abgase eines mit Sauerstoffbrennern betriebenen kammerlosen Stahlschmelzofens dadurch zur Schrottvorwärmung ausgenutzt wird, daß die Ofenabgase möglichst unmittelbar durch an die Ofenöffnung mittels eines Krümmers ansetzbare, austauschbare Behälter gesaugt werden, in denen sich der Einsatz der folgenden Schmelze befindet.Process for operating chamberless melting furnaces for melting von Stahl The patent application R 35756 VI a / 18b concerns a furnace system, according to which the sensible heat of the exhaust gases from a chamberless one operated with oxygen burners Steel melting furnace is used for preheating the scrap that the furnace exhaust gases as directly as possible by attaching to the furnace opening by means of a bend, replaceable containers are sucked, in which the use of the following melt is located.

Bei der Verwendung von Sauerstoffbrennern zum Schmelzen von Schrott, Roheisen u. dgl. hat sich nun ergeben, daß die Verbrennung nach Erreichen einer bestimmten Temperatur des festen Einsatzes unvollständig wird, weil dieser dann die Verbrennungsgase zum Teil wieder reduziert, wobei er selbst in unerwünschter Weise oxydiert. Um diese Oxydation zu vermeiden, ist es zweckmäßig, den Sauerstoff in einem geringeren als dem stöchiometrischen Verhältnis dem Brenner zuzuführen. Darüber hinaus kann es beim Feinen der flüssigen Schmelze erforderlich werden, mit reduzierender Flamme, d. h. ebenfalls unterstöchiometrisch zu arbeiten. In beiden Fällen wird ein erheblicher Teil des Brennstoffes im Stahlschmelzofen nicht verbrannt, und diese in den Abgasen chemisch gebundene Wärme geht für den Prozeß verloren.When using oxygen burners to melt scrap, Pig iron and the like has now shown that the combustion after reaching a certain temperature of the fixed insert is incomplete because this then the combustion gases are partially reduced again, whereby he himself becomes undesirable Way oxidized. In order to avoid this oxidation, it is advisable to use the oxygen to be fed to the burner in a ratio less than the stoichiometric ratio. In addition, it may be necessary to use when refining the liquid melt reducing flame, d. H. also to work substoichiometric. In both In some cases, a considerable part of the fuel in the steel melting furnace is not burned, and this heat, which is chemically bound in the exhaust gases, is lost for the process.

Gemäß der Erfindung soll hier nun dadurch Abhilfe geschaffen werden, daß in den die ansetzbaren Behälter mit dem Schmelzofen verbindenden Krümmer etwa in Richtung der ansetzbaren Behälter insbesondere vorgewärmte und/oder mit Sauerstoff angereicherte Luft zur Nachverbrennung des im Ofen nicht verbrannten Teiles der Abgase eingeleitet bzw. eingeblasen wird.According to the invention, a remedy is to be provided here by that in the bend connecting the attachable container with the melting furnace, for example in the direction of the attachable container in particular preheated and / or with oxygen Enriched air for afterburning the part of the not burned in the furnace Exhaust gases are introduced or blown in.

Durch diese Maßnahme wird der in den Ofenabgasen noch enthaltene unverbrannte Brennstoff, der als CO und H2 vorliegt, verbrannt und in dem Bereich der Abgase eine Temperaturerhöhung erzielt, in dem diese mit dem Einsatzgut der nächsten Schmelze in intensive Berührung kommen.This measure removes the unburnt one still contained in the furnace exhaust gases Fuel in the form of CO and H2 is burned and in the exhaust gas area a temperature increase achieved in which this with the charge of the next melt come into intense contact.

Claims (1)

Patentanspruch: Verfahren zum Betreiben eines kammerlosen Schmelzofens zum Schmelzen von Stahl nach Patentanmeldung R 35756 VI a / 18b (deutsche Auslegeschrift 1273 550), bei welchem die den Ofen verlassenden Abgase durch die Einsatzstoffe enthaltende, vorzugsweise an die Ofenöffnung mittels eines Krümmers auswechselbar ansetzbare Behälter hindurchgesaugt werden, dadurch gekennzeichnet, daß in den Krümmer insbesondere vorgewärmte und/ oder mit Sauerstoff angereicherte Luft zur Nachverbrennung des im Ofen nicht verbrannten Teiles der Abgase etwa in Richtung der ansetzbaren Behälter eingeführt wird. In Betracht gezogene Druckschriften: Deutsche Auslegeschrift Nr. 1102 977.Patent claim: Method for operating a chamberless melting furnace for melting steel according to patent application R 35756 VI a / 18b (German Auslegeschrift 1273 550), in which the exhaust gases leaving the furnace are sucked through containers containing the input materials, preferably replaceable at the furnace opening by means of a bend are, characterized in that in particular preheated and / or oxygen-enriched air is introduced into the manifold for post-combustion of the part of the exhaust gases not burned in the furnace approximately in the direction of the attachable container. Publications considered: German Auslegeschrift No. 1 102 977.
DER37798A 1964-04-29 1964-04-29 Process for operating chamberless furnaces for melting steel Pending DE1282040B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER37798A DE1282040B (en) 1964-04-29 1964-04-29 Process for operating chamberless furnaces for melting steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER37798A DE1282040B (en) 1964-04-29 1964-04-29 Process for operating chamberless furnaces for melting steel

Publications (1)

Publication Number Publication Date
DE1282040B true DE1282040B (en) 1968-11-07

Family

ID=7405318

Family Applications (1)

Application Number Title Priority Date Filing Date
DER37798A Pending DE1282040B (en) 1964-04-29 1964-04-29 Process for operating chamberless furnaces for melting steel

Country Status (1)

Country Link
DE (1) DE1282040B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102977B (en) * 1956-07-31 1961-03-23 Zsigmond De Galocsy Process for operating a shaft furnace intended for scrap remelting with one or more burners installed in the lower part of the furnace and a furnace for carrying out this process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102977B (en) * 1956-07-31 1961-03-23 Zsigmond De Galocsy Process for operating a shaft furnace intended for scrap remelting with one or more burners installed in the lower part of the furnace and a furnace for carrying out this process

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