DE939078C - Process for the production of refractory bricks and ramming masses - Google Patents

Process for the production of refractory bricks and ramming masses

Info

Publication number
DE939078C
DE939078C DED12567A DED0012567A DE939078C DE 939078 C DE939078 C DE 939078C DE D12567 A DED12567 A DE D12567A DE D0012567 A DED0012567 A DE D0012567A DE 939078 C DE939078 C DE 939078C
Authority
DE
Germany
Prior art keywords
masses
mgo
refractory bricks
lime
production
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
DED12567A
Other languages
German (de)
Inventor
Fritz Dr-Ing Gareis
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.)
Dolomitwerke GmbH
Original Assignee
Dolomitwerke 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 Dolomitwerke GmbH filed Critical Dolomitwerke GmbH
Priority to DED12567A priority Critical patent/DE939078C/en
Application granted granted Critical
Publication of DE939078C publication Critical patent/DE939078C/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
    • C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/057—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on calcium oxide

Landscapes

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

Description

Verfahren zur Herstellung feuerfester Steine und Stampfmassen Zusatz zum Patent 93& -173 In dem Patent 93$ 177 ist unter anderem vorgeschlagen worden, feuerfeste Steine aus Kalk in der Weise herzustellen, daß der wie üblich gebrannte Kalk in Hydrat übergeführt und dieses nach Brennen bei Temperaturen von über 150o° C zerkleinert und zu feuerfesten Steinen und Stampfmassen verpreßt und gebrannt wird. So. hergestellte feuerfeste Steine und Stampfmassen zeigen schon einen für die Praxis ausreichenden Widerstand gegen Zerfallserscheinungen.Process for the production of refractory bricks and ramming compounds to patent 93 & -173 In the patent 93 $ 177 it has been suggested, among other things, to manufacture refractory bricks from lime in such a way that the one burned as usual Lime converted into hydrate and this after burning at temperatures of over 150o ° C crushed and pressed into refractory stones and ramming masses and fired will. Refractory bricks and ramming masses produced in this way already show one for the practice of sufficient resistance to the phenomena of decay.

Erfindungsgemäß gelingt es nach diesem Verfahren auch, den Widerstand von Kalk gegen Zerfallen ganz erheblich zu steigern, und zwar dadurch, daß dem Kalkhydrat vor dem Brennen auf über 150o° C geringe Mengen von Magnesit oder Dolomit in der Oxydform, zweckmäßig als Hydrat, zugesetzt werden. Wesentliche Verbesserungen. des Widerstandes gegen Zerfallserscheinungen waren schon bei einem Zusatz von o,5 MgO festzustellen. Mit dem Zusatz von MgO oder von dieses Oxyd enthaltenden oder liefernden Massen muß man erheblich unter der theoretischen. Zusammensetzung,des Dolomits bleiben, da durch größere Zusätze die Feuerfestigkeit sinkt, ohne daß der Widerstand gegen Zerfall steigt. Versuche haben gezeigt, daß der Zusatz von 0,5 bis 2,5"/o MgO bereits eine maximale Beständigkeit gegen Hydratzerfall bei wirkt, ohne die Feuerfestigkeit praktisch zu, beeinflussen. Vorteilhaft ist dieVerwendung von dolomitischem Kalk, zweckmäßig solcher Kalke, die von Natur aus die gewünschte Menge MgO enthalten, so daß keine oder nur geringe Zusätze an MgO oder solches liefernder Massen notwendig sind.According to the invention, it is also possible by this method to increase the resistance of lime to disintegration quite considerably, namely by adding small amounts of magnesite or dolomite in the oxide form, expediently as hydrate, to the hydrated lime before burning to over 150 ° C . Major improvements. the resistance to disintegration phenomena could already be determined with the addition of 0.5 MgO. With the addition of MgO or of masses containing or supplying this oxide, one has to be considerably below the theoretical one. The composition of the dolomite remains, since larger additions reduce the fire resistance without increasing the resistance to disintegration. Experiments have shown that the addition of 0.5 to 2.5 "/ o MgO already has a maximum resistance to the fall of moisture, without practically affecting the fire resistance contain from the desired amount of MgO, so that no or only small additions of MgO or such supplying masses are necessary.

Claims (1)

PATENTANSPRÜCHE: z. Verfahren zur Herstellung von feuerfesten Steinen und Stampfmassen aus Kalk nach Patent 938 177, dadurch gekennzeichnet, daß das Kalkhydrat mit MgO oder dieses Oxyd enthaltenden. oder liefernden. Massen innig gemischt wird, wobei der Zusatz unterhalb der Zusammensetzung des Dolomits bleibt. z. Verfahren nach Anspruch r, gekennzeichnet durch den Zusatz von o,5 bis 2,5% MgO oder dieses Oxyd enthaltenden oder liefernden Massen: 3. Verfahren nach Anspruch r und 2, gekennzeichnet durch die Verwendung von dolomitischem Kalk, zweckmäßig solchem Kalk, der von Natur aus die gewünschte Menge an MgO enthält, so daß keine oder nur geringe Zusätze an MgO oder solches liefernder Massen notwendig sind. PATENT CLAIMS: e.g. Process for the production of refractory bricks and ramming masses from lime according to patent 938 177, characterized in that the hydrated lime with MgO or containing this oxide. or delivering. Masses is intimately mixed, the addition remaining below the composition of the dolomite. z. Process according to claim r, characterized by the addition of 0.5 to 2.5% MgO or masses containing or supplying this oxide: 3. Process according to claims r and 2, characterized by the use of dolomitic lime, expediently such lime derived from Naturally contains the desired amount of MgO, so that little or no additions of MgO or such supplying masses are necessary.
DED12567A 1952-06-25 1952-06-25 Process for the production of refractory bricks and ramming masses Expired DE939078C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED12567A DE939078C (en) 1952-06-25 1952-06-25 Process for the production of refractory bricks and ramming masses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED12567A DE939078C (en) 1952-06-25 1952-06-25 Process for the production of refractory bricks and ramming masses

Publications (1)

Publication Number Publication Date
DE939078C true DE939078C (en) 1956-02-16

Family

ID=7034128

Family Applications (1)

Application Number Title Priority Date Filing Date
DED12567A Expired DE939078C (en) 1952-06-25 1952-06-25 Process for the production of refractory bricks and ramming masses

Country Status (1)

Country Link
DE (1) DE939078C (en)

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