DE967255C - Lateral nozzle arrangement for the production of a well-castable Thomas steel with a low nitrogen content - Google Patents

Lateral nozzle arrangement for the production of a well-castable Thomas steel with a low nitrogen content

Info

Publication number
DE967255C
DE967255C DEM4454D DEM0004454D DE967255C DE 967255 C DE967255 C DE 967255C DE M4454 D DEM4454 D DE M4454D DE M0004454 D DEM0004454 D DE M0004454D DE 967255 C DE967255 C DE 967255C
Authority
DE
Germany
Prior art keywords
well
castable
nitrogen content
low nitrogen
nozzle arrangement
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.)
Expired
Application number
DEM4454D
Other languages
German (de)
Inventor
Dr-Ing Walter Bading
Dr-Ing Gerhard Naeser
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.)
MANNESMANN HUETTENWERKE AG
Original Assignee
MANNESMANN HUETTENWERKE AG
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 MANNESMANN HUETTENWERKE AG filed Critical MANNESMANN HUETTENWERKE AG
Priority to DEM4454D priority Critical patent/DE967255C/en
Application granted granted Critical
Publication of DE967255C publication Critical patent/DE967255C/en
Expired 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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Description

Seitliche Düsenanordnung zur Herstellung eines gut vergießbaren Thomasstahles mit niedrigem Stickstoffgehalt Die Erfindung geht von einem Verfahren zur Herstellung eines gut vergießbaren Thomasstahles mit niedrigem Stickstoffgehalt aus, bei dem der Frischwind hinsichtlich seiner Menge und gegebenenfalls seiner Zusammensetzung sowie seiner Verteilung im Eisenbade derart bemessen wird, daß er auf seinem Wege durch das Bad stets Sauerstoff enthält. Für die Verteilung des Windes im Bade sind die Größe in an sich bekannter Weise seitlich angeordneter Düsen und ihre Lage zur Badoberfläche maßgebend.Lateral nozzle arrangement for the production of a well castable Thomasstahl Low Nitrogen The invention relates to a method of manufacture a well-castable Thomasstahl with a low nitrogen content, in which the fresh wind in terms of its quantity and possibly its composition as well as its distribution in the iron bath is measured in such a way that it is on its way always contains oxygen through the bath. For the distribution of the wind in the bath are the size in a conventional manner of laterally arranged nozzles and their position for Bathroom surface decisive.

Hinsichtlich der Größe der seitlich angeordneten Düsen wurde gefunden, daß bei einem Gesamtblasequerschnitt, der mindestens ebenso groß zu wählen ist, wie er normalerweise beim Verblasen derselben Eisenmenge mittels Bodendüsen angewendet wird, der Durchmesser der einzelnen Düsen wesentlich größer als üblich zu halten ist, damit die Senkung des Stickstoffgehaltes mit Sicherheit erreicht wird. So wurden beim seitlichen Verblasen einer 3o-t-Schmelze mit Düsen von 16 mm Durchmesser Stickstoffgehalte von o,oro bis o,oz5o/o gefunden, während bei Vergrößerung des Durchmessers auf 25 mm die Stickstoffwerte auf o,oo5 bis 0,007'/o sanken. Bei weiterer Vergrößerung der Düsendurchmesser können die Stick- Stoffgehalte noch weiter gesenkt werden. -Außerdem tritt durch Vergrößerung des Gesamtblasequerschnitts eine Verkürzung der Blasezeit ein.With regard to the size of the side-mounted nozzles, it was found that with a total bladder cross-section that is to be chosen at least as large, as is normally used when blowing the same amount of iron through floor nozzles is to keep the diameter of the individual nozzles much larger than usual so that the reduction in nitrogen content is achieved with certainty. So were nitrogen content when a 30-tonne melt is blown from the side with nozzles 16 mm in diameter found from o, oro to o, oz5o / o, while increasing the diameter to 25 mm the nitrogen values sank to 0.05 to 0.007 per cent. With further enlargement the nozzle diameter, the embroidery Substance content even further be lowered. -In addition, a Shortening the bubble time.

Claims (1)

PATENTANSPRUCH: Seitliche Düsenanordnung zum Herstellen eines gut vergießbaren Thomasstahles mit niedrigem Stickstoffgehalt, dadurch gekennzeichnet, daß der Gesamtblasequerschnitt der Düsen mindestens ebenso groß ist wie beim üblichen Blasen mit Bodendüsen und daß der Durchmesser der Düsen mehr als 16 mm, zweckmäßigerweise 25 mm und mehr, beträgt.PATENT CLAIM: Lateral nozzle arrangement for producing a well castable Thomasstahles with low nitrogen content, characterized in, that the total bubble cross-section of the nozzles is at least as large as in the usual Blow with bottom nozzles and that the diameter of the nozzles more than 16 mm, expediently 25 mm and more.
DEM4454D 1943-07-08 1943-07-08 Lateral nozzle arrangement for the production of a well-castable Thomas steel with a low nitrogen content Expired DE967255C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM4454D DE967255C (en) 1943-07-08 1943-07-08 Lateral nozzle arrangement for the production of a well-castable Thomas steel with a low nitrogen content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM4454D DE967255C (en) 1943-07-08 1943-07-08 Lateral nozzle arrangement for the production of a well-castable Thomas steel with a low nitrogen content

Publications (1)

Publication Number Publication Date
DE967255C true DE967255C (en) 1957-10-31

Family

ID=7292688

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM4454D Expired DE967255C (en) 1943-07-08 1943-07-08 Lateral nozzle arrangement for the production of a well-castable Thomas steel with a low nitrogen content

Country Status (1)

Country Link
DE (1) DE967255C (en)

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