DE496880C - Process for the production of carbon-containing, fireproof articles - Google Patents

Process for the production of carbon-containing, fireproof articles

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Publication number
DE496880C
DE496880C DEW77372D DEW0077372D DE496880C DE 496880 C DE496880 C DE 496880C DE W77372 D DEW77372 D DE W77372D DE W0077372 D DEW0077372 D DE W0077372D DE 496880 C DE496880 C DE 496880C
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DE
Germany
Prior art keywords
coal dust
production
objects
carbon
refractory
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
DEW77372D
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German (de)
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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 DEW77372D priority Critical patent/DE496880C/en
Application granted granted Critical
Publication of DE496880C publication Critical patent/DE496880C/en
Expired legal-status Critical Current

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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
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • C04B35/532Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Description

Verfahren zur Herstellung kohlenstoffhaltiger; feuerfester Gegenstände In den Patentschriften 481 693 und 486 166 wird ein Verfahren beschrieben, einen Schutz des Ausmauerungsmaterials in Feuerungsanlagen, insbesondere in Kohlenstaubfeuerungen, dadurch zu erzielen, daß die Wandungen mit einem Kohlenstoffutter ausgekleidet werden, und zwar wird ein Kohlenstaubstrahl mittels eines schwere Kohlenwasserstoffe enthaltenden Druckmittels aufgespritzt, wobei sowohl gasförmige als auch flüssige Kohlenwasserstoffe verwendet werden können.Process for the production of carbonaceous; refractory objects Patent specifications 481 693 and 486 1666 describe a method of protecting the lining material in combustion systems, in particular in pulverized coal combustion, by lining the walls with a carbon lining Sprayed pressure medium, both gaseous and liquid hydrocarbons can be used.

Es wurde nun gefunden, daß dieses Verfahren auch auf andere Gegenstände, die hohen Temperaturen ausgesetzt sind, wie Schmelztiegel, Steine für Ofen- oder Feuerungsausmauerungen u. dgl., angewendet werden kann. Die Gegenstände werden gemäß der Erfindung auf eine oberhalb des Verkokungspunktes liegende Temperatur erhitzt (etwa auf looo bis 1200°) und dann, wie oben beschrieben. mit einem Kohlenstaubstrahl bespritzt. Hierbei wird infolge der hohen Temperaturen der Kohlenstaub verkokt und die Kohlenwasserstoffe unter Abscheidung von Graphit zersetzt. Außerdem entstehen bei dem Verkokungsvorgange des Kohlenstaubes schwere Kohlenwasserstoffe, die sich an den erhitzten Oberflächen gleichfalls zersetzen und Graphit ausscheiden. Da diese Graphitteilchen in unmittelbarer Umgebung der Kohlenstoffteilchen entstehen, so werden sie naturgemäß deren Oberfläche häutchenar tig umgeben und als Bindemittel wirken. Hierdurch wird ein festes Gefüge erhalten, und die verkokten Kohlenpartikelchen werden vor der unmittelbaren Einwirkung der Feuergase geschützt. An Stelle des Kohlenstaubes können auch feuerfeste Stoffe, wie Quarzsand, Schamottemehl o. dgl., verwendet werden.It has now been found that this method can also be applied to other objects, that are exposed to high temperatures, such as crucibles, stones for furnace or Firing linings and the like can be used. The items are made according to the invention heated to a temperature lying above the coking point (about looo to 1200 °) and then as described above. with a jet of coal dust splattered. Here, due to the high temperatures, the coal dust is coked and the hydrocarbons decompose with the deposition of graphite. Also arise in the coking process of the coal dust, heavy hydrocarbons, which also decompose on the heated surfaces and precipitate graphite. This one Graphite particles are formed in the immediate vicinity of the carbon particles, so they are naturally surrounded by their surface in a skin-like manner and act as a binding agent works. This gives a solid structure and the coked carbon particles are protected from the direct effects of the fire gases. Instead of the coal dust Refractory materials such as quartz sand, fireclay powder or the like can also be used.

Zweckmäßig geht man hierbei so vor, daß man den Koksgraphitüberzug in mehreren dünnen Schichten aufbringt, da bei Anwendung einer zu dicken Schicht in einem Arbeitsgange die äußeren Partien nicht schnell genug verkoken und eine nicht genügende Graphitbildung die Folge sein könnte.It is expedient to proceed here in such a way that the coke graphite coating is applied applies in several thin layers, as if too thick a layer is used the outer parts do not coke quickly enough and one insufficient graphite formation could be the result.

An Stelle gasförmiger Kohlenwasserstoffe können auch flüssige, wie Petroleum, Benzol, Teer u. dgl.. verwendet werden.Instead of gaseous hydrocarbons, liquid hydrocarbons such as Petroleum, benzene, tar and the like can be used.

Man kann nach dem oben beschriebenen Spritzverfahren auch graphitische oder koksgraphitische Gegenstände, wie Kohlenstoffsteine, Elektroden, Schmelztiegel o. dgl., in der Weise herstellen, daß ein Kohlenstaubstrahl in Formen oder Schablonen gespritzt wird, die sich in einem hocherhitzten, gegen Luft abgeschlossenen Ofen befinden. Dieses Einspritzen des Kohlenstaubes muß in dünnen Schichten erfolgen, so daß jede Schicht auf eine genügend hohe Temperatur erhitzt wird.The spray process described above can also be used for graphitic or coke-graphitic objects such as carbon bricks, electrodes, crucibles o. The like., Manufacture in such a way that a jet of coal dust in molds or templates is injected, which is in a highly heated, air-sealed oven are located. This injection of coal dust must be done in thin layers, so that each layer is heated to a sufficiently high temperature.

Die Formen oder Schablonen werden in nur mäßig erwärmtem Zustande (unterhalb der Temperatur des Verkokungspunktes) in den Ofen eingebracht, um ein Festbacken des Werkstückes zu verhüten.The molds or stencils are only moderately heated (below the temperature of the coking point) placed in the oven to a To prevent the workpiece from sticking.

Claims (1)

PATLNTANSPRÜCFIE: i. Verfahren zur Herstellung kohlenstoffhaltiger, feuerfester Gegenstände, dadurch gekennzeichnet, daß feuerfeste, beispielsweise aus Schamotte bestehende Gegenstände mit einer aus Halbkoks und Graphit bestehenden Masse umkleidet werden. a. Verfahren nach Anspruch i, dadurch gekennzeichnet. daß auf die auf etwa i ooo bis i2oo° erhitzten feuerfesten Gegenstände Kohlenstaub oder feuerfeste Stoffe, wie Ouarzsand, Schamotte o. dgl., mittels eines schwere Kohlenwasserstoffe enthaltenden Druckgasstrahles gespritzt werden. 3. Verfahren nach Anspruch i und a, dadurch gekennzeichnet, daß an Stelle gasförmiger Kohlenwasserstoffe auch flüssige, wie Petroleum, Benzol, Teer o. dgl., verwendet werden. . q.. Abänderung des Verfahrens nach Anspruch i bis 3 -zwecks Herstellung von Kohlenstoffsteinen, Elektroden, Schmelztiegeln u. dgL, - -dadurch, gekennzeichnet, daß ein Kohlenstaubstrahl in Formen geblasen wird, die sich in einem hocherhitzten Ofen befinden.PATLNT CLAIM: i. Process for the production of carbonaceous, refractory objects, characterized in that refractories, for example objects made of chamotte with one made of semi-coke and graphite Mass to be dressed. a. Method according to claim i, characterized. that on the refractory objects heated to about 10,000 to 1,200 degrees, coal dust or Refractory materials such as Ouarzsand, chamotte o. The like., By means of a heavy hydrocarbons containing compressed gas jet are injected. 3. The method according to claim i and a, characterized in that instead of gaseous hydrocarbons, liquid, such as petroleum, benzene, tar or the like. Can be used. . q .. Modification of the procedure according to claim i to 3 -for the purpose of producing carbon bricks, electrodes, crucibles u. dgL, - characterized in that a jet of coal dust is blown into molds which are in a highly heated oven.
DEW77372D 1927-10-09 1927-10-09 Process for the production of carbon-containing, fireproof articles Expired DE496880C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW77372D DE496880C (en) 1927-10-09 1927-10-09 Process for the production of carbon-containing, fireproof articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW77372D DE496880C (en) 1927-10-09 1927-10-09 Process for the production of carbon-containing, fireproof articles

Publications (1)

Publication Number Publication Date
DE496880C true DE496880C (en) 1930-04-28

Family

ID=7610334

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW77372D Expired DE496880C (en) 1927-10-09 1927-10-09 Process for the production of carbon-containing, fireproof articles

Country Status (1)

Country Link
DE (1) DE496880C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762127C (en) * 1941-02-18 1951-10-29 Roechlingsche Eisen & Stahl Method of sealing the refractory lining of armored metallurgical furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762127C (en) * 1941-02-18 1951-10-29 Roechlingsche Eisen & Stahl Method of sealing the refractory lining of armored metallurgical furnaces

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