DE697994C - Process for removing or binding nitrogen in the manufacture of steel by the duplex process - Google Patents
Process for removing or binding nitrogen in the manufacture of steel by the duplex processInfo
- Publication number
- DE697994C DE697994C DE1933H0135967 DEH0135967D DE697994C DE 697994 C DE697994 C DE 697994C DE 1933H0135967 DE1933H0135967 DE 1933H0135967 DE H0135967 D DEH0135967 D DE H0135967D DE 697994 C DE697994 C DE 697994C
- Authority
- DE
- Germany
- Prior art keywords
- steel
- nitrogen
- duplex
- manufacture
- aluminum
- 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
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
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
Verfahren zur Entfernung oder Bindung des Stickstoffs bei der Herstellung von Stahl, nach dem Duplexverfahren Bei -der Herstellung von Stahl nach dem Duplexverfahren wird häufig festes Thomas eisen oder auch bis zu 6o% und mehr flüssiges vorgeblasenes Thomasflußeisen eingesetzt. Der dem Thomasflußeisen bekanntlich eigene hohe Stickstoffgehalt geht dabei anteilig auf den Siemens-Martin-Stahl über. Hieraus ergibt ,sich bei z. B. 65 % flüssigen Thomaseiseneinsatzes in den Siemens--Martin-Ofen eine .erhebliche Steigerung des Stickstoffgehaltes des Stahles, der in der Erhöhung der Sprödigkeit zum Ausdruck kommt.Process for removing or binding nitrogen during manufacture of steel, according to the duplex process In -the production of steel according to the duplex process solid Thomas iron or up to 6o% and more liquid pre-blown is often used Thomas fluke used. The high nitrogen content inherent in Thomas fluvial iron, as is well known is partly transferred to Siemens-Martin-Stahl. This results in z. B. 65% liquid Thomaseisen insert in the Siemens - Martin furnace a significant Increase in the nitrogen content of the steel, which leads to an increase in brittleness is expressed.
Es ist bekannt, daß durch Zugabe von. aluminiumhaltigen Stoffen, wie Bauxit und Feldspat, der Stickstoff aus einem Eisenbad entfernt werden kann und der Werkstoff seine hohe Zähigkeit beibehält.It is known that by adding. aluminous substances, such as Bauxite and feldspar, which can be removed from an iron bath and nitrogen the material retains its high toughness.
Auch ist schon vorgeschlagen worden, Rolieisen im Hochofen mit stickstoffbindenden Mitteln zu ,erblaxen oder stickstoffbindende Mittel dem Roheisenmischer oder der Roheisenpfanne zuzusetzen und einfache Frischverfahren anzuwenden.It has also already been proposed to use rolie iron in the blast furnace with nitrogen-fixing Means to, bleach or nitrogen-fixing means to the pig iron mixer or the Add hot metal pan and apply simple freshening processes.
Weiter ist es bekannt, die bei Verwendung von Aluminium als Desoxydationsmittel entstehenden Tonerdeeinschlüsse durch Zugabe anderer Stoffe in Form einer leicht schmelzbaren. Schlacke aus dem Stahlbad zu entfernen.It is also known that aluminum is used as a deoxidizer resulting alumina inclusions by adding other substances in the form of a slightly fusible. Remove slag from the steel bath.
Auch ist es -bekannt, - Aluminium zum fertiggefrischten Stahl zuzusetzen, um den Stickstoffgehalt des fertiggefrischten Stahles zu verringern.Also, it is - known - to add aluminum to fertiggefrischten steel, to reduce the nitrogen content of the steel fertiggefrischten.
Diesem bekannten Verfahren gegenüber wird' nun erfindungsgemäß bei Verwendung von flüssigem Thomasflußeisen als Hauptbestandteil des Einsatzes beim Arbeiten nach dem Duplexverfahren das Aluminium unmittelbar nach denn Beschicken des Ofens reit dem Thomasflußeisen in den Ofen eingebracht, um bei der Herstellung des Stahles den Stickstoff zu entfernen oder zu binden. Das Neue am Gegenstand tder Erfindung besteht somit gegenüber dem Stande der Technik im Zeitpunkt der Aluminiumzugabe. Das Aluminium soll also nicht bereits im Einsatz vorhanden sein, sondern es wird erst dem Herdofen unmittelbar nach der Beschickung zugesetzt, während man im Gegensatz zum Gegenstand der Erfindung bis jetzt immer- besteht gewesen ist, die Bindung des Stickstoffes sowie das Desoxydieren an den Schluß des letzten metallurgischen Schmelzverfahrens, d. h. beim Abstich, zu setzen. Zweckmäßig ist es auch, einen Aluminiumüberschuß anzuwenden, damit die Umsetzung des Eisennitrids zu Aluminiumnitrid mit Sicherheit erfolgt.This known method is compared with 'now according to the invention at Use of liquid Thomas fluids as the main component of the insert in Working with the duplex process, the aluminum immediately after loading of the furnace rides the Thomas fluvial iron introduced into the furnace to help in the manufacture of the steel to remove or bind the nitrogen. The new thing about the subject The invention thus exists compared to the state of the art at the time of the addition of aluminum. The aluminum should not already be in use, but it will added to the hearth furnace immediately after loading, while in contrast the subject of the invention until now has always been, the binding of the Nitrogen as well as deoxidizing at the end of the last metallurgical melting process, d. H. at the Racking, to set. It is also useful to have an excess of aluminum to apply so that the conversion of the iron nitride to aluminum nitride with certainty he follows.
Durch diese Zugabe des Aluminiums unmittelbar nach dem Beschicken des Ofens mit flüssigem Thomasflußeisen wird die nebenher immer entstehende Tonerde im Verlaufe der Schmelzung ohne weiteres und ohne besondere Maßnahmen restlos aus dem Stahl ausgeschieden und geht in die Schlacke über. Es bedarf also nicht der beschriebenen besonderen Zusä@tze, um diese Abscheidung der Tonerde zu erreichen: Gleichfalls ist die Wechselwirkung zwischen Aluminium und Eisenbad während des Schmelzverfahrens viel höher als nach dem Abstich in der Pfanne, da das Umsetzungsmittel bedeutend länger auf das Bad einwirkt.By adding the aluminum immediately after loading the furnace with liquid Thomas fluids becomes the clay that is always produced in the course of the melting without further ado and without any special measures excreted in the steel and goes into the slag. So it doesn't need that described special additives to achieve this separation of the alumina: Likewise, there is the interaction between aluminum and iron bath during the melting process much higher than after racking in the pan, since the conversion agent is significant acts longer on the bath.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1933H0135967 DE697994C (en) | 1933-04-20 | 1933-04-20 | Process for removing or binding nitrogen in the manufacture of steel by the duplex process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1933H0135967 DE697994C (en) | 1933-04-20 | 1933-04-20 | Process for removing or binding nitrogen in the manufacture of steel by the duplex process |
Publications (1)
Publication Number | Publication Date |
---|---|
DE697994C true DE697994C (en) | 1940-10-29 |
Family
ID=7177401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1933H0135967 Expired DE697994C (en) | 1933-04-20 | 1933-04-20 | Process for removing or binding nitrogen in the manufacture of steel by the duplex process |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE697994C (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE974872C (en) * | 1950-02-05 | 1961-05-18 | Hoesch Ag | Method of making steel |
US8096427B2 (en) | 2002-05-17 | 2012-01-17 | Rtc Industries, Inc. | Product management display system |
US8910802B2 (en) | 2001-05-17 | 2014-12-16 | Rtc Industries, Inc. | Multi-component display and merchandise systems |
US9289078B2 (en) | 2004-02-03 | 2016-03-22 | Rtc Industries, Inc. | Product securement and management system |
US9706857B2 (en) | 2004-02-03 | 2017-07-18 | Rtc Industries, Inc. | Product securement and management system |
USD801734S1 (en) | 2014-12-01 | 2017-11-07 | Retail Space Solutions Llc | Shelf management parts |
US9844280B2 (en) | 2004-02-03 | 2017-12-19 | Rtc Industries, Inc. | Product securement and management system |
US9955802B2 (en) | 2015-04-08 | 2018-05-01 | Fasteners For Retail, Inc. | Divider with selectively securable track assembly |
US10154739B2 (en) | 2013-12-02 | 2018-12-18 | Retail Space Solutions Llc | Universal merchandiser and methods relating to same |
US10959540B2 (en) | 2016-12-05 | 2021-03-30 | Retail Space Solutions Llc | Shelf management system, components thereof, and related methods |
US11375826B2 (en) | 2004-02-03 | 2022-07-05 | Rtc Industries, Inc. | Product securement and management system |
-
1933
- 1933-04-20 DE DE1933H0135967 patent/DE697994C/en not_active Expired
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE974872C (en) * | 1950-02-05 | 1961-05-18 | Hoesch Ag | Method of making steel |
US9968207B2 (en) | 2001-05-17 | 2018-05-15 | Rtc Industries, Inc. | Multi-component display and merchandise systems |
US8662319B2 (en) | 2001-05-17 | 2014-03-04 | Rtc Industries, Inc. | Product management display system |
US9277831B2 (en) | 2001-05-17 | 2016-03-08 | Rtc Industries, Inc. | Product management display system |
US9226597B2 (en) | 2001-05-17 | 2016-01-05 | Rtc Industries, Inc. | Multi-component display and merchandise systems |
US8910802B2 (en) | 2001-05-17 | 2014-12-16 | Rtc Industries, Inc. | Multi-component display and merchandise systems |
US9468310B2 (en) | 2001-05-17 | 2016-10-18 | Rtc Industries, Inc. | Multi-component display and merchandise systems |
US9730528B2 (en) | 2001-05-17 | 2017-08-15 | Rtc Industries, Inc. | Multi-component display and merchandise systems |
US8096427B2 (en) | 2002-05-17 | 2012-01-17 | Rtc Industries, Inc. | Product management display system |
US9723934B2 (en) | 2004-02-03 | 2017-08-08 | Rtc Industries, Inc. | Product securement and management system |
US11058234B2 (en) | 2004-02-03 | 2021-07-13 | Rtc Industries, Inc. | Product securement and management system |
US11659943B2 (en) | 2004-02-03 | 2023-05-30 | Rtc Industries, Inc. | Product securement and management system |
US11375826B2 (en) | 2004-02-03 | 2022-07-05 | Rtc Industries, Inc. | Product securement and management system |
US9706857B2 (en) | 2004-02-03 | 2017-07-18 | Rtc Industries, Inc. | Product securement and management system |
US9289078B2 (en) | 2004-02-03 | 2016-03-22 | Rtc Industries, Inc. | Product securement and management system |
US10051977B2 (en) | 2004-02-03 | 2018-08-21 | Rtc Industries, Inc. | Product securement and management system |
US9993091B2 (en) | 2004-02-03 | 2018-06-12 | Rtc Industries, Inc. | Product securement and management system |
US9844280B2 (en) | 2004-02-03 | 2017-12-19 | Rtc Industries, Inc. | Product securement and management system |
US10258169B2 (en) | 2004-02-03 | 2019-04-16 | Rtc Industries, Inc. | Product securement and management system |
US10349755B2 (en) | 2004-02-03 | 2019-07-16 | Rtc Industries, Inc. | Product securement and management system |
US10945538B2 (en) | 2004-02-03 | 2021-03-16 | Rtc Industries, Inc. | Product securement and management system |
US10667630B2 (en) | 2004-02-03 | 2020-06-02 | Rtc Industries, Inc. | Product securement and management system |
US10154739B2 (en) | 2013-12-02 | 2018-12-18 | Retail Space Solutions Llc | Universal merchandiser and methods relating to same |
USD874197S1 (en) | 2014-12-01 | 2020-02-04 | Retail Space Solutions Llc | Shelf management dividers |
USD801734S1 (en) | 2014-12-01 | 2017-11-07 | Retail Space Solutions Llc | Shelf management parts |
US10588426B2 (en) | 2015-04-08 | 2020-03-17 | Fasteners For Retail, Inc. | Divider with selectively securable track assembly |
US9955802B2 (en) | 2015-04-08 | 2018-05-01 | Fasteners For Retail, Inc. | Divider with selectively securable track assembly |
US11122915B2 (en) | 2015-04-08 | 2021-09-21 | Fasteners For Retail, Inc. | Divider with selectively securable track assembly |
US11690463B2 (en) | 2015-04-08 | 2023-07-04 | Fasteners For Retail, Inc. | Divider with selectively securable track assembly |
US10959540B2 (en) | 2016-12-05 | 2021-03-30 | Retail Space Solutions Llc | Shelf management system, components thereof, and related methods |
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