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DE632226C - Process for deoxidizing and desulphurising steel braids using calcium carbide - Google Patents

Process for deoxidizing and desulphurising steel braids using calcium carbide

Info

Publication number
DE632226C
DE632226C DEW94249D DEW0094249D DE632226C DE 632226 C DE632226 C DE 632226C DE W94249 D DEW94249 D DE W94249D DE W0094249 D DEW0094249 D DE W0094249D DE 632226 C DE632226 C DE 632226C
Authority
DE
Germany
Prior art keywords
calcium carbide
deoxidizing
steel
desulphurising
carbide
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
DEW94249D
Other languages
German (de)
Inventor
Dr Ludwig Hoermann
Dr Wilhelm Jansen
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie 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 Wacker Chemie AG filed Critical Wacker Chemie AG
Priority to DEW94249D priority Critical patent/DE632226C/en
Application granted granted Critical
Publication of DE632226C publication Critical patent/DE632226C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04Removing impurities by adding a treating agent
    • C21C7/064Dephosphorising; Desulfurising

Landscapes

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

Description

Verfahren zum Desoxydieren und Entschwefeln von Stahlbädern durch Kalziumkarbid Setzt man Stahlbädern in bekannter Weise zur Desoxydation und Entschwefelung festes Kalziumkarbid zu, so bleibt das, Karbid infolge seines niedrigeren spezifischen Gewichtes auf dem Metallbad liegen und verschlackt dort. Die desoxydierende und entschwefelnde Wirkung des Karbids ist dabei völlig ungenügend. Verpackt man Kalziumkarbidstücke, ähnlich wie dies schon bei Verwendung von Natrium zwecks Einwirkung auf Metallschmelzen vorgeschlagen wurde, in Metallbüchsen, so zeigt sich, daß dünnwandige Metallumhüllungen schnell abschmelzen, so daß das Karbid. wie bei Verwendung dieses Stoffes im losen Zustande frei auf der Oberfläche der Schmelze schwimmt; die Einwirkung ist dabei vollkommen ungenügend, und es tritt Verschlackung ein. Die Verpackung der Kalziumkarbidstücke in starkwandigen Eisen- oder Stahlbüchsen ist praktisch aus wirtschaftlichen Gründen ausgeschlossen, da derartige Büchsen zu teuer kommen, abgesehen von den Kosten, die beim Füllen und Verschließen derartig schwerer und unhandlicher Behälter anfallen.Process for deoxidizing and desulfurizing steel baths Calcium carbide Steel baths are used for deoxidation and desulphurisation in a known manner solid calcium carbide to, so that remains, carbide owing to its lower specificity Weight lie on the metal bath and slag there. The deoxidizing and The desulphurizing effect of the carbide is completely inadequate. If you pack pieces of calcium carbide, similar to what happens when sodium is used to act on molten metal was proposed in metal cans, it is found that thin-walled metal sheaths melt away quickly, leaving the carbide. like using this fabric in bulk States floating freely on the surface of the melt; the influence is there completely insufficient, and slagging occurs. The packaging of the calcium carbide pieces in thick-walled iron or steel cans is practical for economic reasons excluded, since such cans are too expensive, apart from the costs, which arise when filling and closing such heavy and unwieldy containers.

Diese Nachteile werden vermieden, wenn man zum Desoxydieren und Entschwefeln von Stahlbädern Kalziumkarbid verwendet, welches in Metall eingeschmolzen ist. Gibt man derartig vorbehandeltes Karbid in ein flüssiges Metallbad, so sinkt es bis zum Boden unter. Die metallischen Bestandteile schmelzen, und das Karbid steigt durch das ganze Metallbad durch, wobei es in- innige Berührung mix ihm kommt und eine überraschend gute Entschwefelung und Desoxydation des Stahlbades herbeiführt.These disadvantages are avoided if one goes for deoxidizing and desulfurizing Calcium carbide is used in steel baths, which is melted into metal. Gives If you put carbide pretreated in this way into a liquid metal bath, it sinks to Floor under. The metallic components melt and the carbide rises through through the whole metal bath, with an intimate touch mix coming to him and one brings about surprisingly good desulfurization and deoxidation of the steel bath.

Die Anwendung der Pakete im Stahlwerksbetrieb kann in beliebiger Weise erfolgen, z: B. derart, daß sie vor den Zuschlägen für das Fertignachen des Stahles -zum eingeschmolzenen Eisenbad gegeben werden. Beim basischen Siemens-Martin-Verfahren, sofern mit zwei Schlacken gearbeitet wird, erfolgt die Zugabe der Pakete zweckmäßig zwischen der ersten und zweiten Schlacke. Außerdem können die Pakete auch in die Pfanne zugegeben werden. Die ausgezeichnete Wirkung der Pakete ist au! folgenden Beispielen ersichtlich. Beispiel i In .eine 20t Siemens-Martin-Stahl enthaltende Pfanne wurden während des Laufens des Abstiches 4o kg Karbid in Form von Paketen zugegeben, welche aus etwa i o % Karbid und go % Eisen bestanden. Der Schwefelgehalt vor Zugabe der Pakete betrug im Mittel etwa 0,022 % und nach Zugabeder Pakete etwa o, o i i - o/ti .The application of the packages in the steel mill can be used in any way take place, for example, in such a way that they are before the allowances for the finishing of the steel -to be added to the melted iron bath. With the basic Siemens-Martin process, if two slags are used, the packages are added appropriately between the first and second slag. The packages can also be saved in the To the pan. The excellent effect of the packages is au! following Examples can be seen. Example i In .a 20t Siemens-Martin steel containing During the tapping process, 40 kg of carbide were stored in the pan in the form of packets added, which consists of about i o% Passed carbide and go% iron. The sulfur content before the addition of the packets averaged about 0.022% and after Adding the packages about o, o i i - o / ti.

Beispiel z Zu 25t basischem Siemens-Martin-Stahl wurden nach Abziehen der eisten Schlacke 5o kg Kalziumkarbid in Form von Paketen zugegeben. Nach Zusatz der Pakete wurde die zweite Schlacke abgetragen. Der Schwefelgehalt vor Zugabe betrug im Mittel %, ch Zugabe o,oi8 0/p.Example z After stripping, 25t of basic Siemens-Martin steel were added 50 kg of calcium carbide were added to the first slag in the form of packets. After addition The second slag was removed from the packets. The sulfur content before addition was on average%, ch addition o, oi8 0 / p.

0,040.04

Claims (1)

PATENTANSPRUCI3: Verfahren zum Desoxydieren und Entschwefeln von Stahlbädern durch Kalziumkarbid, dadurch gekennzeichnet, daß in Metall eingeschmolzenes Kalziumkarbid verwendet wird.PATENT CLAIM3: Process for deoxidizing and desulfurizing steel baths by calcium carbide, characterized in that calcium carbide melted into metal is used.
DEW94249D 1934-05-13 1934-05-13 Process for deoxidizing and desulphurising steel braids using calcium carbide Expired DE632226C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW94249D DE632226C (en) 1934-05-13 1934-05-13 Process for deoxidizing and desulphurising steel braids using calcium carbide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW94249D DE632226C (en) 1934-05-13 1934-05-13 Process for deoxidizing and desulphurising steel braids using calcium carbide

Publications (1)

Publication Number Publication Date
DE632226C true DE632226C (en) 1936-07-04

Family

ID=7614066

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW94249D Expired DE632226C (en) 1934-05-13 1934-05-13 Process for deoxidizing and desulphurising steel braids using calcium carbide

Country Status (1)

Country Link
DE (1) DE632226C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973313C (en) * 1949-03-01 1960-01-21 Phoenix Rheinrohr Ag Vereinigt Process for the production of alloyed steels according to the basic wind freshening process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973313C (en) * 1949-03-01 1960-01-21 Phoenix Rheinrohr Ag Vereinigt Process for the production of alloyed steels according to the basic wind freshening process

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