DE2502930C3 - Refractory material and process for its manufacture - Google Patents
Refractory material and process for its manufactureInfo
- Publication number
- DE2502930C3 DE2502930C3 DE19752502930 DE2502930A DE2502930C3 DE 2502930 C3 DE2502930 C3 DE 2502930C3 DE 19752502930 DE19752502930 DE 19752502930 DE 2502930 A DE2502930 A DE 2502930A DE 2502930 C3 DE2502930 C3 DE 2502930C3
- Authority
- DE
- Germany
- Prior art keywords
- aluminum oxide
- oxide
- mixture
- particle size
- magnesium
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000011819 refractory material Substances 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N al2o3 Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- GVALZJMUIHGIMD-UHFFFAOYSA-H Magnesium phosphate tribasic Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 7
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 7
- 239000004137 magnesium phosphate Substances 0.000 claims description 6
- 229960002261 magnesium phosphate Drugs 0.000 claims description 6
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 6
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- ILRRQNADMUWWFW-UHFFFAOYSA-K Aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 6
- 239000002245 particle Substances 0.000 claims 4
- 239000000395 magnesium oxide Substances 0.000 claims 3
- 239000000919 ceramic Substances 0.000 claims 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 239000010452 phosphate Substances 0.000 claims 1
- UKNAYQWNMMGCNX-UHFFFAOYSA-N sodium;[hydroxy(phenyl)methyl]-oxido-oxophosphanium Chemical compound [Na+].[O-][P+](=O)C(O)C1=CC=CC=C1 UKNAYQWNMMGCNX-UHFFFAOYSA-N 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 241001676573 Minium Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
Description
erläutern.explain.
Man verwendet eine Mischung der folgenden Be-40 standteile:Using a mixture of the following constituents loading 40:
Tafelförmiges AluminiumoxidTabular alumina
Die Erfindung betrifft ein feuerfestes Material, das 1,17 bis 4,70 mm 29,8 kgThe invention relates to a refractory material that is 1.17 to 4.70 mm 29.8 kg
sich beim Erhitzen permanent ausdehnt, und ein Ver- Tafelförmiges Aluminiumoxidexpands permanently when heated, and a tabular aluminum oxide
fahren zu seiner Herstellung. 45 0,246 bis 1,17 mm 21,6 kgdrive to its manufacture. 45 0.246 to 1.17 mm 21.6 kg
Es sind bereits feuerfeste oder hitzebeständige Alu- Tafelförmiges AluminiumoxidThey are already refractory or heat-resistant aluminum tabular aluminum oxide
miniumoxid-Chromoxid-Produkte, wie feuerfeste 0,043 bis 0,246 mm 14,8 kgminium oxide-chromium oxide products, such as refractories 0.043-0.246 mm 14.8 kg
Steine usw., hergestellt worden. Diese feuerfesten Tafelförmiges AluminiumoxidStones, etc., have been produced. These refractory tabular alumina
Produkte sind mit Hilfe einer Reihe von Mitteln ge- < 0,043 mm 19,1 kgProducts are by a number of means - <0.043 mm 19.1 kg
bunden worden, die auch entweder eine Monoalumi- 50 Calciniertes Aluminiumoxidwhich has also been bound to either a monoaluminum 50 calcined alumina
niumphosphatlösung oder eine 80%ige Phosphor- < 0,043 mm 4,7 kgsodium phosphate solution or an 80% phosphorus <0.043 mm 4.7 kg
säurelösung einschließen. Obwohl diese Produkte Chromoxid < 0,043 mm 10,0 kgInclude acid solution. Although these products are chromium oxide <0.043 mm 10.0 kg
eine gute lineare Stabilität und eine gute Volumen- Magnesiumphosphatlösung 5,4 kggood linear stability and a good volume magnesium phosphate solution 5.4 kg
Stabilität besitzen, ist es erwünscht, Produkte zu bilden, die beim Erhitzen eine permanente Ausdehnung 55 Man verformt die Mischung dann zu Steinen mit zeigen. den Abmessungen 228,6 · 114,3 · 76,2 mm und brenntStability own, it is desired to form products that upon heating a permanent extension 55, the mixture is then deformed to show stones with. the dimensions 228.6 x 114.3 x 76.2 mm and burns
Diese Eigenschaft der permanenten Ausdehnung die Steine während 5 h bei 1566° C. Die gebrannten
ist dann erwünscht, wenn dieses Produkt für kon- Steine besitzen die folgenden Eigenschaften:
struktive oder Bauzwecke verwendet wird, beispielsweise als Auskleidung für kernlose Induktionsöfen. 6o Lineare VeränderungThis property of permanent expansion of the stones for 5 h at 1566 ° C. The fired is desirable if this product for con-stones have the following properties:
Structural or building purposes is used, for example as a lining for coreless induction furnaces. 6o linear change
Für diese Anwendungszwecke ist es erwünscht, daß nach dem Brennen +0,19%For these purposes it is desirable that after firing + 0.19%
die Auskleidung eine permanente Ausdehnung zeigt, Bruchmodul 596,8 kg/cm2 the lining shows permanent expansion, modulus of rupture 596.8 kg / cm 2
so daß die sich gegebenenfalls bildenden Risse sich Porosität 10,90%so that the cracks that may develop have a porosity of 10.90%
nicht öffnen und ein Durchdringen des Metalls durch Absorption 3,30%do not open and penetration of the metal by absorption 3.30%
die Ofenauskleidung bewirken können. 65 Dichte 3,34 g/cm3 the furnace lining. 65 density 3.34 g / cm 3
Gegenstand der Erfindung ist daher ein feuerfestesThe invention therefore relates to a refractory
Material, das sich beim Erhitzen permanent ausdehnt Es werden zwei als Ansätze A und B bezeichneteMaterial That Expands Permanently When Heated. Two are referred to as Approaches A and B.
und das 72 bis 98% Aluminiumoxid, 1 bis 25% Vergleichsansätze durchgeführt, bei denen an Stelleand the 72 to 98% alumina, 1 to 25% comparisons performed on those in place
von 5,4 kg Magnesiumphosphatlösung 5,5 kg einer 80°/§igen Phosphorsäurelösung (Ansatz A) bzw. 4,7 kg Monoaluminiumphosphat (Ansatz ß) eingesetzt werden. Sämtliche anderen Bestandteile sind die gleichen wie die im obigen Beispiel verwendeten. Die sich ergebenden Eigenschaften der Produkte des Beispiels und der Vergleichsansätze A und B sind in der folgenden Tabelle zum Zwecke des direkten Vergleichs angegeben.of 5.4 kg of magnesium phosphate solution, 5.5 kg of an 80% phosphoric acid solution (approach A) or 4.7 kg of monoaluminum phosphate (approach ß) can be used. All other ingredients are the same as those used in the above example. The resulting properties of the products of the example and the comparative batches A and B are given in the following table for the purpose of direct comparison.
Aus der obigen Beschreibung und den angegebenen Beispielen ist deutlich zu ersehen, daß eine permanente Ausdehnung dadurch erreicht wird, daß man Magnesiumphosphat zu dem feuerfesten AIu-.niniumoxid-Chromoxid-Material zusetzt.From the above description and the examples given, it can be clearly seen that permanent expansion is achieved by adding magnesium phosphate to the refractory aluminum .ninium oxide-chromium oxide material.
Eigenschaftenproperties
Vergleichs- Vergleichsansatz A ansatz B Comparative comparative approach A approach B
Lineare Veränderung nach dem Brennen % +0,19 —0,08 —0,08Linear change after firing% + 0.19-0.08-0.08
Bruchmodul, kg/cm2 596,8 493,1 516,5Modulus of rupture, kg / cm 2 596.8 493.1 516.5
Claims (3)
ner Mischung aus 'tafelförmigem und ca.cinier- Die in dieser Weise> gebädete Mischung wird dannof tabular aluminum oxide with a partial »aluminum oxide, ι to Z 3 - /. ^ ° ™ X1U and 4 to 7 «,, small size of <0.043 to 4.7 mm or from a magnesium phosphate solution,
The mixture bathed in this way is then
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44564774 | 1974-02-25 | ||
US445647A US3862845A (en) | 1974-02-25 | 1974-02-25 | Alumina refractories having a permanent expansion upon heating |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2502930A1 DE2502930A1 (en) | 1975-08-28 |
DE2502930B2 DE2502930B2 (en) | 1977-01-27 |
DE2502930C3 true DE2502930C3 (en) | 1977-09-15 |
Family
ID=
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