DE2042034A1 - Cast iron including ductile cast iron prodn - from steel scrap briquettes contg silicon and carbon - Google Patents

Cast iron including ductile cast iron prodn - from steel scrap briquettes contg silicon and carbon

Info

Publication number
DE2042034A1
DE2042034A1 DE19702042034 DE2042034A DE2042034A1 DE 2042034 A1 DE2042034 A1 DE 2042034A1 DE 19702042034 DE19702042034 DE 19702042034 DE 2042034 A DE2042034 A DE 2042034A DE 2042034 A1 DE2042034 A1 DE 2042034A1
Authority
DE
Germany
Prior art keywords
cast iron
silicon
chips
briquetted
carbon
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
DE19702042034
Other languages
German (de)
Inventor
Dieter Scherer
Juergen Scherer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19702042034 priority Critical patent/DE2042034A1/en
Publication of DE2042034A1 publication Critical patent/DE2042034A1/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B11/00Making pig-iron other than in blast furnaces
    • 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
    • C21C1/00Refining of pig-iron; Cast iron
    • 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
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/08Manufacture of cast-iron
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating
    • C22B1/248Binding; Briquetting ; Granulating of metal scrap or alloys
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The briquetted chips and steel scrap contain Si and C in required proportion, e.g., as SiC, and pref. also slag-formers, e.g., CaO, SiO2, Al2O3. Si content is reached by adding 10, 15, 25, 45, 75 or 90% FeSi.

Description

Verwendung von Eisen- und Stahispönen zur Herstellung eines Ausgangsrohstoffes zur Produktion handelsüblicher Gußeisensorten Der bisherige Stand der Technik geht davon aus, daß Gußeisen unter der Verwendet S g von Roheisen oder/und Stahischrott und Kreislaufmaterial in Kupolöfen oder Elektroöfen erzeugt wird. Der aus den Einsatzmaterialien resultierende Mangel an Silizium und Kohle wird durch den Einsatz von handelsüblichen Ferro-Silizium-Sorten, Grcl.hit oder anderen Rohstoffarten ergänzt. Der Nachtei I dieses Verfahrens beruht darin, daß in den entsprechenden Schmelzaggregaten neben den genannten Einsatzmaterialien Ferrolegierungen, nämlich 10, 25, 45 und 75 obiges FeSi, sowie Kohlenstoffträger, die zumeist aus Nebenerzeugnissen der Kohle und Petrochemie sowie der Elektrodenproduktion stammen, verwendet werden müssen. Das Beschwernis beruht darin, daß die genannten Legierungszusätze spezifisch leichter als die Ausgangsschmelze sind und somit eine abbrandlose und innige Mischung nur schwer erreicht werden kann.Use of iron and steel spoons for the production of a raw material for the production of commercially available types of cast iron. The current state of the art works assumes that cast iron is used under the S g of pig iron and / or steel scrap and recycled material is produced in cupolas or electric furnaces. The one from the input materials resulting shortage of silicon and carbon is due to the use of commercially available Ferro-silicon varieties, Grcl.hit or other types of raw materials are added. The night I of this process is based on the fact that in addition to the corresponding melting units the mentioned input materials ferro alloys, namely 10, 25, 45 and 75 above FeSi, as well as carbon carriers, mostly from by-products of coal and petrochemicals as well as the electrode production must be used. The hardship is based on the fact that the alloy additives mentioned are specifically lighter than the starting melt and thus a burn-free and intimate mixture can only be achieved with difficulty.

Die elektrothermisch bedingte Badbewegung unterstützt das Mischen, jedoch kann sie niemals, besonders im Hinblick auf die verschiedenen Konstruktionen der Schmelzaggregate, befriedigende Ergebnisse erbringen. Nicht unerwähnt soll bleiben, daß die genannten Silizium- und Kohlenstoffträger verhältnismäßig teuer und in ihrem Ausbringen unwirtschaftlich sind.The electrothermal bath movement supports the mixing, however, it never can, especially in view of the various constructions of the melting units, produce satisfactory results. Shouldn't go unmentioned that the said silicon and carbon carriers are relatively expensive and in their Spreading is uneconomical.

Die Verwendung von Eisen- und Stahlanfällen aus der Schrott- und zerspanenen Industrie bot sich immer wieder an, jedoch konnten geeignete Zusammensetzungen und Formgebungen für die verwendeten Ausgangsmaterialien nicht gefunden werden.The use of iron and steel deposits from the scrap and machined Industry offered itself again and again, but suitable compositions and Shapes for the raw materials used cannot be found.

Der Erfindungsgedanke geht davon aus, daß Stahischrott, Stahl- und Eisenspäne ein wirtschaftliches Ausgangsmaterial zur Erzeugung von Gußeisen sind, wenn Si lizium-und Kohlenstoffträger dem Einsatzmaterial so zugesetzt werden, daß sich die gewünschten Gußeisenqualitäten ergeben.The idea of the invention is based on the fact that steel scrap, steel and Iron filings are an economical raw material for the production of cast iron, when silicon and carbon carriers are added to the feedstock in such a way that the desired cast iron qualities result.

Verwendung von Eisen- und Stahlspänen zur Herstellung eines Ausgangsrnhstoffe zur Produktion handelsüblicher Gußeisensorten Zur Erzeugung der vergießbaren Gußeisenqualitäten sind neben der Zufügung geugneter Legierungselemente ggf. noch weitere schlackenbildende Komponente erforderlich Wenn auch davon ausgegangen werden kann, daß in den Elektro-Schmeiz-Aggreguien Schlacken von zweitrcngiger Bedeutung sind, so dürfte die Notwendigkeit der Schlakken außer Frage stehen.Use of iron and steel shavings for the production of a raw material for the production of commercially available cast iron grades for the production of cast iron grades In addition to the addition of suitable alloying elements, there may be other slag-forming elements Component required Even if it can be assumed that in the Elektro-Schmeiz-Aggreguien Slags are of secondary importance, so the need for slags is likely are out of the question.

Der Erfindungsgedanke besteht darin, die in der zerspanenen und Schrott-industrie anfallenden Späne so zu brikettieren, daß die Legierungselemente sowie die erforderlichen schlackenbildenden Elemente beigemischt sind, so daß die gewünschten Gußeisenqualitäten erreicht werden.The idea of the invention is to be found in the machining and scrap industries to briquette accruing chips so that the alloying elements as well as the required Slag-forming elements are added, so that the desired cast iron qualities can be achieved.

Patentansprüche: 1. Brikettierte Späne und Stahlschrott dadurch gekennzeichnet, daß die verwendeten Späne in der brikettierten Form Silizium und Kohlenstoff in den notwendigen Anteilen enthalten, z. B. in der Form von Siliziumkarbid.Claims: 1. Briquetted chips and steel scrap characterized in that that the chips used in the briquetted form silicon and carbon in contain the necessary proportions, e.g. B. in the form of silicon carbide.

2. Brikettierte Späne wie vor dadurch gekennzeichnet, daß die verwendeten Späne in der brikettierten Form Schlackenbildner vornehmlich Ca 0, Si 02, Al 03 enthalten.2. Briquetted chips as before, characterized in that the used Chips in the briquetted form Slag formers mainly Ca 0, Si 02, Al 03 contain.

3. Brikettierte Späne dadurch gekennzeichnet, daß die Briketts Silizium und Kohlenstofftröger in der Form von Siliziumkarbid und Schlackenbildner in der Form von Ca 0, Si 02 und Al 203 enthalten.3. Briquetted chips, characterized in that the briquettes are silicon and carbon carriers in the form of silicon carbide and slagging agents in the Form of Ca 0, Si 02 and Al 203 included.

Claims (1)

4. Brikettierte Späne dadurch gekennzeichnet, daß nur ein Siliziumträger, beispielsweise FeSi 10, 15, 25, 45, 75, 90 0/ig, zugemischt wird, um den gewünschten Siliziumgehalt zu erzielen.4. Briquetted chips, characterized in that only one silicon carrier, for example FeSi 10, 15, 25, 45, 75, 90 0 / ig, is added to the desired To achieve silicon content. Verwendung von Eisen- und Stahlspänen zur Herstellung eines AusgangsrohstoffesUse of iron and steel chips for the production of a raw material zur Produktion handelsüblicher Gußeisensorten 5. Brikettierte Späne dadurch gekennzeichnet, daß Silizium und Kohlenstofftröger in der Form von Silizium-Karbid und Ferrosilizium oder aber von Ferrosilizium l.nd Kohlenstoff dem Brikett zugefügt werden, so daß die gewünschte Analyse erreicht wird. for the production of commercially available types of cast iron 5. Briquetted chips characterized in that silicon and carbon carriers are in the form of silicon carbide and ferrosilicon or ferrosilicon and carbon added to the briquette so that the desired analysis is achieved. 6. Brikettierte Späne dadurch gekennzeichnet, daß das Ausgangsmaterial durch Zumischung der unter Patentanspruch 1, 2, 3 und 4 genannten Zusatzstoffe sowie eines geeigneten Entschwefelungsmittels, z. B. Kalk, Soda oder Calciumkarbid, wie es zur Erzeugung von niedrig schwefelhaltigem Eisen für die weitere Herstellung von duktilem Gußeisen erforderlich ist, vorbereitet ist.6. Briquetted chips, characterized in that the starting material by adding the additives mentioned under claims 1, 2, 3 and 4 and a suitable desulfurizing agent, e.g. B. lime, soda or calcium carbide, such as it is used to produce low-sulfur iron for further manufacture of ductile cast iron is required, is prepared. 7. Brikettierte Späne dadurch gekennzeichnet, daß neben dem Silizium, Kohlenseaff und Entschwefelungströger weitere Legierungselemente, wie beispielsweise Magnesium und Zehr, zur Herstellung von duktilem Gußeisen beigemischt werden.7. Briquetted chips, characterized in that in addition to the silicon, Kohlenseaff and desulphurisation carrier other alloy elements, such as Magnesium and Zehr are added to the production of ductile cast iron. 8. Brikettierte Späne dadurch gekennzeichnet, daß neben den im Patentanspruch @ 2, 3, 4, 5 und 6 genannten Zusatzstoffen Molybdän, Nickel, Titan, Chroms gan, Kupfer oder andere Legierungselemente den Spänen vor der Brikettierung zugefugt werden.8. Briquetted chips, characterized in that in addition to the claim @ 2, 3, 4, 5 and 6 mentioned additives molybdenum, nickel, titanium, chromium gan, Copper or other alloy elements are added to the chips before briquetting will. 9. Brikettierte Späne dadurch gekennzeichnet, daß neben den im Patentanspruch 2, 3, 4, 5, 6, 7 und 8 genannten Zusatzstoffen Impf- oder Entgasungsmittei zugemischt werden.9. Briquetted chips, characterized in that in addition to the claim 2, 3, 4, 5, 6, 7 and 8 mentioned additives inoculating or degassing agents mixed in will.
DE19702042034 1970-08-25 1970-08-25 Cast iron including ductile cast iron prodn - from steel scrap briquettes contg silicon and carbon Pending DE2042034A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19702042034 DE2042034A1 (en) 1970-08-25 1970-08-25 Cast iron including ductile cast iron prodn - from steel scrap briquettes contg silicon and carbon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702042034 DE2042034A1 (en) 1970-08-25 1970-08-25 Cast iron including ductile cast iron prodn - from steel scrap briquettes contg silicon and carbon

Publications (1)

Publication Number Publication Date
DE2042034A1 true DE2042034A1 (en) 1972-03-02

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DE19702042034 Pending DE2042034A1 (en) 1970-08-25 1970-08-25 Cast iron including ductile cast iron prodn - from steel scrap briquettes contg silicon and carbon

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348273A2 (en) * 1973-08-03 1977-11-10 Nl Industries Inc COMPOSITION OF FERROUS METAL DEBRIS POROUS AND IMPREGNATED WITH RARE EARTHS, USEFUL FOR TREATING MELTED IRON
FR2452525A1 (en) * 1979-03-29 1980-10-24 Frank & Schulte Gmbh Cement-bonded alloy carrier briquette - for charging cupola furnace, contains carbon-rich ferro-manganese and silicon carbide
DE2727896C2 (en) * 1977-06-21 1984-08-23 Keßl, Werner, 8481 Bärnwinkel Use of silicon carbide compacts as a cupola additive

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348273A2 (en) * 1973-08-03 1977-11-10 Nl Industries Inc COMPOSITION OF FERROUS METAL DEBRIS POROUS AND IMPREGNATED WITH RARE EARTHS, USEFUL FOR TREATING MELTED IRON
DE2727896C2 (en) * 1977-06-21 1984-08-23 Keßl, Werner, 8481 Bärnwinkel Use of silicon carbide compacts as a cupola additive
FR2452525A1 (en) * 1979-03-29 1980-10-24 Frank & Schulte Gmbh Cement-bonded alloy carrier briquette - for charging cupola furnace, contains carbon-rich ferro-manganese and silicon carbide

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