DE656928C - Process for the manufacture of refractory bricks or linings - Google Patents

Process for the manufacture of refractory bricks or linings

Info

Publication number
DE656928C
DE656928C DES116048D DES0116048D DE656928C DE 656928 C DE656928 C DE 656928C DE S116048 D DES116048 D DE S116048D DE S0116048 D DES0116048 D DE S0116048D DE 656928 C DE656928 C DE 656928C
Authority
DE
Germany
Prior art keywords
corundum
linings
refractory bricks
manufacture
percent
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
DES116048D
Other languages
German (de)
Inventor
Dr-Ing Kamillo Konopicky
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.)
MAGNESITAL GmbH
Original Assignee
MAGNESITAL GmbH
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 MAGNESITAL GmbH filed Critical MAGNESITAL GmbH
Priority to DES116048D priority Critical patent/DE656928C/en
Application granted granted Critical
Publication of DE656928C publication Critical patent/DE656928C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/42—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/12—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates

Description

Verfahren zur Herstellung von feuerfesten Steinen oder Auskleidungen Es ist bekannt, für die Herstellung von Steinen Korund mit Tonen oder tonsubstanzhaltigen Stoffen einzubinden. Man erhält hierbei Steine bzw. Massen, welche wohl einen hohen Tonerdegehalt und einen hohen Schmelzpunkt aufweisen, deren Druckerweichung und Schlackenbeständigkeit gegenüber den üblichen Schamottesteinen aber nicht oder nur unwesentlich verbessert sind.Process for the manufacture of refractory bricks or linings It is known for the production of stones corundum with clays or clay substances Include substances. You get stones or masses, which are probably high Alumina content and a high melting point, their pressure softening and Slag resistance compared to the usual firebricks but not or only are insignificantly improved.

Es wurde auch vorgeschlagen, als Bindemittel für feuerfeste keramische Massen Metallhydroxyde, so auch Chromhydroxyd, zu verwenden. Es ergeben sich hierbei beträchtliche Schwierigkeiten, da sich die physikalischen Eigenschaften durch Alterung oder anderes leicht ändern; auch müssen Hydroxyde, wie das Chr omhydroxyd, erst auf chemischem Wege aus Erzen gewonnen werden und sind daher teuer. Um ein zu starkes Schwinden der.Masse beim Brennen zu verhindern, kann man zudem nur einen geringen Prozentsatz, z. B. 6%o, anwenden. Ferner wurde schon vorgeschlagen, fein zerkleinerten Korund zu feuerfesten Massen, vor allem Silica, zuzusetzen. Das Verfahren soll auch für die Herstellung von Bauxit-, Chromerz- und Magnesitsteinen geeignet sein. Als Mengenverhältnisse werden für den Chromerzsteinetwa 50 : 50 vorgeschlagen, wobei das Chromerz in grober Körnung und der Korund fein gemahlen vorliegen sollen. Ferner wurde ein Verfahren zur Herstellung feuerfester Formkörper beschrieben, nach welchem Schlacken spinellartiger Zusammensetzung als Grundmasse mit Magnesia oder Gemischen von Magnesia und Chromerz eingebunden werden sollen. Korund hat hierbei keine Anwendung gefunden.It has also been suggested as a binder for refractory ceramic Use bulk metal hydroxides, including chromium hydroxide. It results here considerable difficulty as the physical properties change with aging or change other things easily; also hydroxides, such as chromium hydroxide, must first are obtained chemically from ores and are therefore expensive. To be too strong In addition, one can only do a little to prevent the mass from shrinking during firing Percentage, e.g. B. 6% o, apply. It has also been proposed to use finely ground Add corundum to refractory masses, especially silica. The procedure should also be suitable for the production of bauxite, chrome ore and magnesite bricks. as Proportions are suggested for the chrome ore stone of about 50:50, where the chrome ore should be coarse-grained and the corundum finely ground. Further a process for the production of refractory moldings was described, according to which Slags with a spinel-like composition as a base with magnesia or mixtures of magnesia and chrome ore are to be incorporated. Corundum has no application here found.

Es wurde nun gefunden, daß Aluminiumoxyd und Chromerz beim Brennen reagieren und bei richtiger Wahl des Mischungsverhältnisses und der Körnung Massen liefern, welche eine hohe Feuerstandfestigkeit mit einer guten mechanischen Festigkeit und hohen Schlackenfestigkeit verbinden.It has now been found that aluminum oxide and chromium ore when burned react and, if the mixing ratio and grain size are correctly selected, masses deliver, which have a high fire resistance with a good mechanical strength and high slag strength.

Demgemäß besteht das Verfahren nach der Erfindung, bei dem Gemische aus Korund und Chromeisenerz geformt und gebrannt werden, darin, daß Korund oder hochtonerdehaltige Schlacken in grob- und feinkörniger Foren angewendet werden, wobei mindestens 3o Gewichtsprozente derselben in Korngrößen Tiber I mm Größe vorhanden sind, während das Chromeisenerz in Mengen von höchstens 5o Gewichtsprozenten und in Korngrößen unter 0,3 mm Größe benutzt wird. In manchen Fällen ist es wünschenswert, das Chromerz SO fein zu mahlen, d,aß ein beträchtlicher Teil desselben durch das Sieb z oo (DIN 1171) geht. An Stelle des Korunds können jauch hochtonerdehaltige Schlacken mit z. ß. über go01o A1.0.3, wie sie beim Thermitverfähren vielfach abfallen, verwendet werden, Da die Zusammensetzung des Chromerzes schwankt, ist es in manchen Fällen vor haft, gleichzeitig mit demselben auch Maue sia bzw. Magnesit, vorzugsweise Sintermagnes@ in geringer Menge einzubringen. Man kann. manchmal hierdurch auch den für eine gute Druckerweichung notwendigen Al2 O3-Gehalt im abreagierten Teil herabsetzen.Accordingly, the method of the invention consists in blending from corundum and chrome iron ore are formed and fired, in that corundum or high alumina slags are used in coarse and fine-grain forums, at least 30 percent by weight thereof being present in grain sizes Tiber 1 mm in size are, while the chromium iron ore in amounts of at most 5o percent by weight and is used in grain sizes below 0.3 mm. In some cases it is desirable To grind the chrome ore SO finely, d, ate a considerable portion of it by that Sieb z oo (DIN 1171) goes. In place of the corundum, it is also possible to use high alumina Slag with z. ß. via go01o A1.0.3, as shown in the Thermit process often fall off, be used, Since the composition of the chrome ore fluctuates, in some cases it is suspected, at the same time as Maue sia resp. Magnesite, preferably Sintermagnes @ to be introduced in small amounts. One can. sometimes thereby also the Al2 O3 content in the reacted, which is necessary for good pressure softening Reduce part.

Ausführungsbeispiel I 3 Teile Korund, dessen Siebanalyse 54,1% Korn über i mm, und 27,I % unter o,25 ergibt, wird mit I Teil gemahlenem Chromerz (42% unter 0,o6 mm) vermischt. Die Mischung hat 4o,6% Korundkorn über i mm.Embodiment I 3 parts of corundum, its sieve analysis 54.1% grain over i mm, and 27.1% under 0.25, is obtained with 1 part of ground chrome ore (42% below 0.06 mm) mixed. The mixture has 40.6% corundum grain over 1 mm.

Nach dem Verpressen und Brennren bei SK 16 bis 18 wurde ein Stein folgender Zusammenssetzung erhalten: A12 03 . . . . . . . . . .. . . . . . . . 77,6%, Cr2 03 . . . . . . . ... . . . . . . . . 10,8% , Fe2, 03 . . . . . . . . . . . . . ... . 3,8l)8%, Mg0 . . . . . ... . .. . . .... . . 4,8 °%0 , SiO2 ............ ....... 2a,90%, Ca0 ......... .......... o,20%°. Seine Eigenschaften waren folgende: Porösität..................... 23,4 °l% Druckfestigkeit. . . . . . . . . . . . . . . . 1250 kg/cm², ta. . .. . . . .... . . . . . . . . . . . . . . . . 1700°, te . . . . . . . . . . . . . . . . . . . . . . . . bis 173o° . Ausführungsbeispiel z 5o% Korund, grob, 25% Korund, fein, 25o%o Chromerz, fein, ergaben eine Druckfestigkeit von über I ooo kg cm², ta 17oo°, te über 1 7oo°.After pressing and firing at SK 16 to 18, a stone was created received the following composition: A12 03. . . . . . . . . ... . . . . . . 77.6%, Cr2 03. . . . . . . ... . . . . . . . 10.8%, Fe2.03. . . . . . . . . . . . . ... 3.8l) 8%, Mg0. . . . . ... ... . .... . 4.8 °% 0, SiO2 ............ ....... 2a, 90%, Ca0 ......... .......... o, 20% °. Its characteristics were as follows: Porosity ..................... 23.4 ° l% compressive strength. . . . . . . . . . . . . . . . 1250 kg / cm², ta. . ... . . .... . . . . . . . . . . . . . . . 1700 °, te . . . . . . . . . . . . . . . . . . . . . . . . up to 173o °. Embodiment z 50% corundum, coarse, 25% corundum, fine, 25o% o chrome ore, fine, resulted in a compressive strength of over 10,000 kg cm², ta 1,7oo °, te over 1,700 °.

Claims (1)

PATENTANSPRUCH: Verfahren zum Herstellen von feuerfesten Steinen oder Auskleidungen durch Formen und Brennen von Gemischen aus Korund und Chromeisenerz, dadurch ge- kennzeichnet, daß Korund oder hochtonerdehaltig.e Schlacken in grob- und feinkörniger Form angewendet werden, wobei mindestens 3o Gewichtsprozent derselben in Korngrößen über i lnni Größe vorhanden sind, während das Chromeisenerz. in Mengen von höchstens 5o Gewichtsprozenten und in Korngrößen unter o,3 mm Größe benützt wird.PATENT CLAIM: A process for the production of refractory bricks or linings by molding and firing mixtures of aluminum oxide and chrome iron ore, characterized indicates overall that corundum or hochtonerdehaltig.e slags are used in coarse and fine granular form, wherein at least 3o percent by weight of the same into particle sizes i lnni size exist while the chromium ore. is used in amounts of not more than 50 percent by weight and in grain sizes below 0.3 mm.
DES116048D 1934-11-11 1934-11-11 Process for the manufacture of refractory bricks or linings Expired DE656928C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES116048D DE656928C (en) 1934-11-11 1934-11-11 Process for the manufacture of refractory bricks or linings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES116048D DE656928C (en) 1934-11-11 1934-11-11 Process for the manufacture of refractory bricks or linings

Publications (1)

Publication Number Publication Date
DE656928C true DE656928C (en) 1938-02-18

Family

ID=7533789

Family Applications (1)

Application Number Title Priority Date Filing Date
DES116048D Expired DE656928C (en) 1934-11-11 1934-11-11 Process for the manufacture of refractory bricks or linings

Country Status (1)

Country Link
DE (1) DE656928C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760139C (en) * 1940-04-30 1952-02-14 Magnesital G M B H Process for the production of quench-resistant magnesite bricks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760139C (en) * 1940-04-30 1952-02-14 Magnesital G M B H Process for the production of quench-resistant magnesite bricks

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