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DE3416310A1 - Carbon-containing unfired magnesia brick bound by organic binder - Google Patents

Carbon-containing unfired magnesia brick bound by organic binder

Info

Publication number
DE3416310A1
DE3416310A1 DE19843416310 DE3416310A DE3416310A1 DE 3416310 A1 DE3416310 A1 DE 3416310A1 DE 19843416310 DE19843416310 DE 19843416310 DE 3416310 A DE3416310 A DE 3416310A DE 3416310 A1 DE3416310 A1 DE 3416310A1
Authority
DE
Germany
Prior art keywords
bound
carbon
organic binder
tar
magnesia
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.)
Ceased
Application number
DE19843416310
Other languages
German (de)
Inventor
Michel Longwy-Bas Ruer
Margarete Dr. 6229 Schlangenbad Seeger
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.)
Didier Werke AG
Original Assignee
Didier Werke 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 Didier Werke AG filed Critical Didier Werke AG
Priority to DE19843416310 priority Critical patent/DE3416310A1/en
Priority to CA000480523A priority patent/CA1239657A/en
Priority to FR8506683A priority patent/FR2563827B1/en
Publication of DE3416310A1 publication Critical patent/DE3416310A1/en
Ceased legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/013Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics containing carbon
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/22Natural resins, e.g. rosin
    • C04B26/24Cellulosic waste liquor, e.g. sulfite lye
    • 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
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/44Refractory linings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Metallurgy (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

The invention relates to an unfired, carbon-containing and tar-impregnated magnesia brick, bound by an organic binder, for metallurgical vessels for receiving steel melts.

Description

- 2 - 02.04.1984- 2 - 04/02/1984

KXR/Sa/Sc PA 3251KXR / Sa / Sc PA 3251

DIDIER-WERKE AG Lessingstraße 16 - 18 6200 WiesbadenDIDIER-WERKE AG Lessingstrasse 16-18 6200 Wiesbaden

Kohlenstoffhaltiger ungebrannter, mit organischem Bindemittel gebundener MagnesiasteinCarbon-containing unfired magnesia stone bound with an organic binder

Die Erfindung betrifft einen kohlenstoffhaltigen ungebrannten, mit organischem Bindemittel gebundenen Magnesiastein für metallurgische Gefäße zur Aufnahme von Stahlschmelze wie Pfannen, Konverter und Lichtbogenofen.The invention relates to a carbon-containing unfired, with organic Binder-bound magnesia stone for metallurgical vessels for Acceptance of molten steel such as ladles, converters and electric arc furnaces.

Für die Zustellung von metallurgischen Gefäßen für Stahlschmelze werden gebrannte und anschließend mit Teer imprägnierte Magnesiasteine sowie teergebundene und getemperte Magnesiasteine verwendet. Die keramich gebundenen teerimprägnieren Steine sind sehr aufwendig in der Herstellung und ihre Widerstandsfähigkeit gegen Rißbildung ist vielfach nicht befriedigend. Bei den teergebundenen Steinen tritt als Nachteil die heiße Formgebung und bei erhöhten Temperaturen teilweise eine unzureichende Festigkeit auf.For the delivery of metallurgical vessels for molten steel burned magnesia stones impregnated with tar and tar-bound and tempered magnesia stones are used. The ceramic-bound Tar impregnation stones are very expensive to manufacture and use their resistance to cracking is often unsatisfactory. The disadvantage of the tar-bound stones is the hot shape and in some cases insufficient strength at elevated temperatures.

Nach der DE-OS 14 71 230 ist ein basischer feuerfester Stein für die Verwendung bei Sauerstoff- asverfahren bekannt, der ein in Gegenwart von Wasser wirksames Bindemittel, wie z.B. Magnesiumsulfat oder Sulfitablauge und 1 bis 25 % Hartpech aufweist. Die Festigkeit des Steins und das Verhalten gegenüber der Schlackeninfiltration ist aber nicht zufriedenstellend.According to DE-OS 14 71 230 is a basic refractory brick for use known in the case of oxygen as processes, the one in the presence of Water-effective binding agent, such as magnesium sulphate or sulphite waste liquor and 1 to 25% hard pitch. The strength of the stone and that However, there is no behavior towards slag infiltration satisfactory.

-3--3-

Die nach dem Verfahren der DE-OS 20 28 272 erhaltenen chemisch gebundenen und mit Teer getränkten Magnesiasteine erweisen sich durch im Zusammenhang mit dem Bindemittel Al kai!phosphat beim Aufheizen entstehende schädliche Gase als problematisch und zeigen im Betrieb eine relativ hohe Verschleißrate.The chemically bonded obtained by the process of DE-OS 20 28 272 and tar-soaked magnesia stones turn out to be related through with the binding agent alkali! phosphate produced during heating Gases as problematic and show a relatively high level in operation Wear rate.

Die Aufgabe nach der Erfindung besteht in einem Magnesiastein der eingangs genannten Art, bei dem die aus dem angeführten Stand der Technik bekannten Nachteile vermieden werden, der Aufwand von Energie bei der Herstellung vermindert wird, und der bei guter Festigkeit ein günstiges Betriebsverhalten und eine verbesserte Haltbarkeit erreicht.The object according to the invention consists in a magnesia brick of the initially mentioned type, in which the disadvantages known from the cited prior art are avoided, the expenditure of energy in the production is reduced, and which achieves favorable operating behavior and improved durability with good strength.

Die Aufgabe findet ihre Lösung nach den Patentansprüchen 1 und 2.The problem is solved according to claims 1 and 2.

Die Herstellung des Magnesiasteins erfolgt nach üblichen Verfahren durch Vermischen des körnigen Magnesiasinters mit dem Bindemittel und Verpressen der Mischung zu Steinen ohne die Anwendung von erhöhten Temperaturen, durch Trocknen, anschließendes Imprägnieren der Steine mit flüssigem Teer bei erhöhter Temperatur und unter Anwendung von Vakuum und durch eventuelles Tempern der teergetränkten Steine. Die Steine erreichen mit Bezug auf ungebrannte Magnesiasteine eine hohe Festigkeit, ein günstiges Verhalten im Betrieb ohne die Freisetzung von schädlichen Gasen im Zusammenhang mit dem organischen Bindemittel, ein verbessertes Verhalten gegen Schlackenangriff und Rißbildung und eine längere Haltbarkeit.The production of the magnesia stone is carried out according to the usual methods Mixing the granular magnesia sinter with the binder and pressing the mixture into stones without the use of elevated temperatures Drying, then impregnating the stones with liquid tar increased temperature and using a vacuum and by possible tempering of the tar-soaked stones. The stones reach with respect to unfired magnesia bricks have high strength, favorable behavior in operation without the release of harmful gases related to the organic binders, improved behavior against slag attack and cracking and a longer shelf life.

Der Magnesiastein nach der Erfindung wird durch das Beispiel 1 in Gegenüberstellung zu den außerhalb der Erfindung liegenden Beispielen 2 und näher erläutert.The magnesia brick according to the invention is illustrated in Example 1 in Comparison to Examples 2 and 3, which are outside the scope of the invention explained in more detail.

-4--4-

Es wurde ein für den Einsatz bei Konvertern üblicher eisenarmer Sintermagnesit mit über 90 Gew.-% MgO und einem CaO/S^-Verhältnis von 2,0 in abgestufter Körnung verwendet.It became a low-iron sintered magnesite common for use in converters with over 90 wt% MgO and a CaO / S ^ ratio of 2.0 in graded grain used.

Nach den Beispielen 1 bis 3 hergestellte Konvertersteine wurden jeweils zu Feldern von etwa 60 χ 80 cm im Konverter/Bereich zylindrischer Teil paarweise gegeneinanderstoßend eingesetzt. Aus mehreren Versuchen ergab sich bei 100 bis 125 Chargen ein um 10 bis 30 mm geringerer Verschleiß der Magnesiasteine nach der Erfindung (Beispiel 1) gegenüber den Steinen nach Beispiel 2 und 3.Converter bricks produced according to Examples 1 to 3 were each closed Fields of about 60 χ 80 cm in the converter / area of the cylindrical part in pairs used butting against each other. From several attempts it emerged with 100 to 125 batches, 10 to 30 mm less wear of the Magnesia bricks according to the invention (Example 1) compared to the bricks Example 2 and 3.

-5--5-

BEISPIELEX)EXAMPLES X )

Rußsoot Gew.-% I% By weight I. 1 I1 I. - 22 °C/4 h° C / 4 h 3 H3 H Magnesiasinter 3 - 7 mmMagnesia sinter 3 - 7 mm Sulfitablauge 50-%ige LösungSulphite waste liquor 50% solution Gew.-% I% By weight I. I
35 I
I.
35 I.
1 100 j1 100 y 3535 I
3b I
I.
3b I
0,5 - 3 mm0.5-3 mm Teer (EP 65"C)Tar (EP 65 "C) Gew.-% jWt% j 33 I33 I. I 150-C/4 h
ι
I 150-C / 4 h
ι
3333 °C/4 h° C / 4 h 33 I33 I.
0,09 - 0,5 mm0.09-0.5mm Verarbei tungstemperaturProcessing temperature Gew.-% IWt -.% I 20 I20 I. I
I
I.
I.
1212th ,0, 0 16 116 1
- 0,09 mm- 0.09 mm PreßdruckPress pressure Gew.-% I% By weight I. 12 I
ι
12 I.
ι
I
ι
I.
ι
2020th 16 816 8
Trocknendry I
+ 3 I
I
I.
+ 3 I.
I.
II.
I 4,0I 4.0
8
+ 4 \
8th
+ 4 \
TempernAnnealing Gew.-% I% By weight I. I
+ 2 I
ι
I.
+ 2 I.
ι
II. + 2+ 2 1
I - I
1
I - I
Brandfire II. II. I 3,5 II 3.5 I. Teertränkung/AufnahmeTar watering / intake N/rnm2 N / rnm 2 II. - [ 90 0C J[90 0 CJ Vakuum 60 TorrVacuum 60 torr I
I
I.
I.
100100 I 10° II 10 ° I
Temperatur 180 "CTemperature 180 "C I 150I 150 1 — I1 - I. Teer EP 60 "CTar EP 60 "C II. j 300 "C/5 h I
I B
j 300 "C / 5 h I.
IB
Gew.-%Wt% I 1650I 1650 I f
I i
I n
I f
I i
I n
I 5I 5 I
I (i
I.
I (i
I SI S I 1I 1 I I
ι ι
II
ι ι
I !
I \
I!
I \

1 = organisch gebunden, ungebrannt, teergetränkt1 = organically bound, unfired, tar-soaked

2 = keramisch gebunden, teergetränkt2 = ceramic bonded, tar-soaked

3 = teergebunden, getempert3 = tar-bound, tempered

Claims (2)

02.04.1984 KXR/Sa/Sc PA 3251 DIDIER-WERKE AG Lessingstraße 16 - 18 Wiesbaden Kohlenstoffhaltiger ungebrannter, mit organischem Bindemittel gebundener Magnesiastein Patentansprüche:04/02/1984 KXR / Sa / Sc PA 3251 DIDIER-WERKE AG Lessingstrasse 16 - 18 Wiesbaden Carbon-containing unfired magnesia stone bound with organic binding agent Patent claims: 1. Kohlenstoffhaltiger ungebrannter, mit organischem Bindemittel gebundener Magnesiastein, dadurch gekennzeichnet, daß er teergetränkt ist.1. Carbon-containing unfired, bound with organic binder Magnesia stone, characterized in that it is impregnated with tar. 2. Magnesiastein nach Anspruch 1, dadurch gekennzeichnet, daß er mit Sulfitablauge als organischem Bindemittel gebunden ist.2. Magnesia brick according to claim 1, characterized in that it is made with sulphite waste liquor is bound as an organic binder. -2--2-
DE19843416310 1984-05-03 1984-05-03 Carbon-containing unfired magnesia brick bound by organic binder Ceased DE3416310A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19843416310 DE3416310A1 (en) 1984-05-03 1984-05-03 Carbon-containing unfired magnesia brick bound by organic binder
CA000480523A CA1239657A (en) 1984-05-03 1985-05-01 Carbonaceous unfired magnesia brick bonded with an organic binder
FR8506683A FR2563827B1 (en) 1984-05-03 1985-05-02 CARBON-CONTAINING MAGNESIC BRICK, GREEN, BINDED WITH ORGANIC BINDER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843416310 DE3416310A1 (en) 1984-05-03 1984-05-03 Carbon-containing unfired magnesia brick bound by organic binder

Publications (1)

Publication Number Publication Date
DE3416310A1 true DE3416310A1 (en) 1985-11-14

Family

ID=6234844

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843416310 Ceased DE3416310A1 (en) 1984-05-03 1984-05-03 Carbon-containing unfired magnesia brick bound by organic binder

Country Status (3)

Country Link
CA (1) CA1239657A (en)
DE (1) DE3416310A1 (en)
FR (1) FR2563827B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213330B (en) * 1960-06-14 1966-03-24 Oesterr Amerikan Magnesit Process for the production of basic or neutral bricks, stones or masses for refractory purposes
DE1471230A1 (en) * 1963-04-11 1969-05-29 Heuer Russell Pearce Basic, refractory stone
DE2028272A1 (en) * 1969-06-21 1970-12-23 Didier-Werke Ag, 6200 Wiesbaden Process for the production of magnesite bricks
US3578472A (en) * 1967-11-03 1971-05-11 Dresser Ind Carbonaceous bonding system for regractories
DE2901889A1 (en) * 1978-01-18 1979-07-19 Nippon Oil Co Ltd Process for the production of refractory bricks

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE793510A (en) * 1971-12-29 1973-04-16 Combustion Eng REFRACTORY MATERIAL AND PROCESS FOR MANUFACTURING BODIES SHAPED IN THIS MATERIAL
US3903025A (en) * 1973-11-06 1975-09-02 Gen Refractories Co Method for cold molding pitch bonded refractory

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213330B (en) * 1960-06-14 1966-03-24 Oesterr Amerikan Magnesit Process for the production of basic or neutral bricks, stones or masses for refractory purposes
DE1471230A1 (en) * 1963-04-11 1969-05-29 Heuer Russell Pearce Basic, refractory stone
US3578472A (en) * 1967-11-03 1971-05-11 Dresser Ind Carbonaceous bonding system for regractories
DE2028272A1 (en) * 1969-06-21 1970-12-23 Didier-Werke Ag, 6200 Wiesbaden Process for the production of magnesite bricks
DE2901889A1 (en) * 1978-01-18 1979-07-19 Nippon Oil Co Ltd Process for the production of refractory bricks

Also Published As

Publication number Publication date
CA1239657A (en) 1988-07-26
FR2563827A1 (en) 1985-11-08
FR2563827B1 (en) 1992-07-10

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