PL93187B2 - - Google Patents
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- PL93187B2 PL93187B2 PL180068A PL18006875A PL93187B2 PL 93187 B2 PL93187 B2 PL 93187B2 PL 180068 A PL180068 A PL 180068A PL 18006875 A PL18006875 A PL 18006875A PL 93187 B2 PL93187 B2 PL 93187B2
- Authority
- PL
- Poland
- Prior art keywords
- weight
- silicon carbide
- amount
- mass
- grain size
- Prior art date
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- YQOPHINZLPWDTA-UHFFFAOYSA-H [Al+3].[Cr+3].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [Al+3].[Cr+3].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O YQOPHINZLPWDTA-UHFFFAOYSA-H 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910000151 chromium(III) phosphate Inorganic materials 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Przedmiotem wynalazku jest sposób wytwarzania wykladziny ogniotrwalej z weglika krzemu na spoiwach fosforanowych, znajdujacej zastosowanie w przemysle energetycznym, metali niezelaznych, jako material o wysokiej temperaturze topnienia, wiazany na zimno.Dotychczasowy sposób wytwarzania wykladziny ogniotrwalej z weglika krzemu na spoiwach fosforanowych polega na tym, ze ziarna weglika krzemu wiazane sa w temperaturze pokojowej za pomoca dodatku 8—10% ciezarowych kwasnego fosforanu glinu i wypaleniu w temperaturze 110°C i 600°C. Otrzymane tworzywa charakteryzuja sie bardzo niska wytrzymaloscia.Sposób wedlug wynalazku polega na tym, ze weglik krzemu o uziarnieniu ponizej 5 mm miesza sie z wodorotlenkiem glinu w ilosci do 10% ciezarowych i aktywizowanym tlenkiem glinu w ilosci do 10% ciezarowych. Nastepnie mase zarabia sie kwasnym fosforanem glinowo-chromowym w ilosci 2—15% ciezarowych lub 25% roztworem wodnym polifosforanu sodowego w ilosci 2—15% ciezarowych, przy czym w tym przypadku dodaje sie do masy do 5% ciezarowych substancji wapnionosnej np. wodorotlenku wapnia. Tak wytworzona mase homogenizuje sie i nanosi metoda ubijania na konstrukcje stalowa, po czym wygrzewa sie w temperaturze od 80 do 400°C.Wytrzymalosc wykladziny ogniotrwalej otrzymanej sposobem wedlug wynalazku wynosi, na zimno 150 kG/cm2, a po wygrzaniu okolo 300 kG/crraponadto wykladzina wykazuje stalosc objetosci i nie utlenia sie w zakresie temperatur 1200—1500°C.Przyklad I. Weglik krzemu w ilosci 100 kg, o uziarnieniu 40% frakcji ponizej 0,2 mm 16% frakcji 0,2-0,5 mm 44% frakcji 0,5-4 mm miesza sie z 1,5 kg wodorotlenku glinu o frakcji ponizej 0,1 mm i z 4,5 kg aktywizowanego tlenku glinu o frakcji ponizej 0,1 mm. Nastepnie zarabia sie wodnym roztworem fosforanu glinochromowego w ilosci 6,5 kg2 93 187 o nastepujacym skladzie chemicznym: P205 ¦ 34,7%, Ala05 * 8,5%, CraOa - 3,5% oraz z 1 kg wody. Mase ubija sie a nastepnie suszy i wygrzewa w temperaturze 80-400°C.Przyklad II. Weglik krzemu ouziarnieniu i ilosci jak w przykladzie I, miesza sie z 1,5 kg wodorotlenku glinu o frakcji ponizej 0,1 mm z 4,5 kg aktywizowanego tlenku glinu o uziarnieniu ponizej 0,1 mm oraz z 1,1 kg wodorotlenku wapnia. Nastepnie mase zarabia sie z 10 kg 25% wodnego roztworu polifosforanu sodu. Mase ubija sie i suszy jak w przykladzie I. PLThe subject of the invention is a method of producing a silicon carbide refractory lining on phosphate binders, used in the energy industry, non-ferrous metals, as a material with a high melting point, cold-bonded. The current method of producing silicon carbide refractory lining on phosphate binders is based on the fact that The silicon carbide grains are bonded at room temperature with the addition of 8-10 weight% acid aluminum phosphate and fired at 110 ° C and 600 ° C. The obtained materials are characterized by very low strength. The method according to the invention consists in the fact that silicon carbide with a grain size of less than 5 mm is mixed with aluminum hydroxide in an amount up to 10% by weight and activated alumina in an amount up to 10% by weight. Then, the mass is prepared with acidic aluminum-chromic phosphate in the amount of 2-15% by weight or with a 25% aqueous solution of sodium polyphosphate in the amount of 2-15% by weight, in which case up to 5% by weight of calcareous substance, e.g. calcium hydroxide, is added to the mass. . The mass produced in this way is homogenized and the tamping method is applied to a steel structure, and then heated at a temperature of 80 to 400 ° C. The strength of the refractory lining obtained by the method according to the invention is 150 kg / cm2 when cold, and about 300 kg / cm2 after heating. The lining shows a constant volume and does not oxidize in the temperature range of 1200-1500 ° C. Example I. Silicon carbide in the amount of 100 kg, with a grain size of 40%, fraction below 0.2 mm 16% fraction 0.2-0.5 mm 44% of 0.5-4 mm fraction is mixed with 1.5 kg of aluminum hydroxide with a fraction less than 0.1 mm and with 4.5 kg of activated alumina with a fraction less than 0.1 mm. Then, the preparation is made with an aqueous solution of aluminum chromium phosphate in the amount of 6.5 kg2 93 187 with the following chemical composition: P205 ¦ 34.7%, Ala05 * 8.5%, CraOa - 3.5% and 1 kg of water. The mass is whipped and then dried and heated in the temperature of 80-400 ° C. Example II. Silicon carbide with a grain size and quantity as in Example 1, is mixed with 1.5 kg of aluminum hydroxide with a fraction of less than 0.1 mm, 4.5 kg of activated alumina with a grain size of less than 0.1 mm and 1.1 kg of calcium hydroxide. Then the mass is made with 10 kg of a 25% aqueous solution of sodium polyphosphate. The mass is whipped and dried as in example I. PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL180068A PL93187B2 (en) | 1975-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL180068A PL93187B2 (en) | 1975-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL93187B1 PL93187B1 (en) | 1977-05-30 |
| PL93187B2 true PL93187B2 (en) | 1977-05-31 |
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