DE1136923B - Process for the protection of furnaces against attack by slag - Google Patents
Process for the protection of furnaces against attack by slagInfo
- Publication number
- DE1136923B DE1136923B DEB58614A DEB0058614A DE1136923B DE 1136923 B DE1136923 B DE 1136923B DE B58614 A DEB58614 A DE B58614A DE B0058614 A DEB0058614 A DE B0058614A DE 1136923 B DE1136923 B DE 1136923B
- Authority
- DE
- Germany
- Prior art keywords
- nickel
- slag
- ramming
- chromium oxide
- corundum
- 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.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 239000010431 corundum Substances 0.000 claims description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 7
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 4
- 239000011253 protective coating Substances 0.000 claims description 4
- 229920001353 Dextrin Polymers 0.000 claims description 3
- 239000004375 Dextrin Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 235000019425 dextrin Nutrition 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000003973 paint Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 229910052566 spinel group Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Description
Verfahren zum Schutze von Feuerungen gegen Schlackenangriff Zusatz zur Patentanmeldung B 57441 VI b / 80 b (Auslegeschrift 1127 269) Die Patentanmeldung B 57441 VI b / 80 b betrifft ein Verfahren zum Schutze von Feuerungen gegen Schlackenangriff, welches im wesentlichen darin besteht, daß man Stampfmassen als Schutzüberzüge benutzt, deren Hauptbestandteil aus denjenigen Mineralien besteht, die sich beim Erkalten der Schlacke zuerst und/oder in größerer Menge abscheiden.Method for protecting furnaces against attack by slag Addition to patent application B 57441 VI b / 80 b (Auslegeschrift 1127 269) The patent application B 57441 VI b / 80 b relates to a method for protecting furnaces against attack by slag, which essentially consists of ramming used as protective coatings, the main component of which consists of those minerals that are deposited first and / or in larger quantities when the slag cools.
In steinkohlegefeuerten Schmelzkammeröfen scheiden sich z. B. aus Ale 03 Si 02 reichen Schlackenschmelzen an der Grenzschicht flüssige Schlacke-Stampfmasse nach den Gesetzen der Phasengleichgewichte Korund (A1,0.) und Mullit (3A120,-2 Si 02) ab. Die Schlackenschmelze ist also an dieser Grenzschicht bei den dort herrschenden Temperaturen an Korund und Mullit übersättigt. Besteht die Stampfmasse aus einem der beiden Mineralien oder aus einer Mischung von beiden, so ist infolge von Übersättigung eine Korrosion der Stampfmasse schon weitestgehend eingeschränkt. Nach diesem Verfahren soll deshalb die Stampfmasse neben den üblichen Bindemitteln, wie z. B. Kaolin und Bentonit, überwiegend Korund und/oder Mullit enthalten.In coal-fired melting chamber furnaces, z. B. from Ale 03 Si 02, slag melts at the boundary layer from liquid slag tamped mass according to the laws of phase equilibria of corundum (A1.0.) And mullite (3A120, -2 Si 02). The molten slag is therefore oversaturated with corundum and mullite at this boundary layer at the temperatures prevailing there. If the ramming mass consists of one of the two minerals or a mixture of the two, corrosion of the ramming mass is already largely restricted as a result of oversaturation. According to this method, the ramming mass should therefore in addition to the usual binders, such as. B. kaolin and bentonite, predominantly corundum and / or mullite.
Es wurde nun gefunden, daß die Wirkung der nach dem Verfahren der Hauptpatentanmeldung benutzten Stampfmassen, die im wesentlichen aus primären Ausscheidungen der Schlacke bestehen, noch wesentlich erhöht werden kann, wenn den Stampfmassen Nickel- und/oder Chromoxyd zugesetzt wird oder diese mit einem nickel- und/oder chromoxydhaltigen Überzug versehen wird.It has now been found that the effect of the Main patent application used ramming compounds, which essentially consisted of primary precipitates the slag exist, can still be increased significantly if the ramming masses Nickel and / or chromium oxide is added or this with a nickel and / or chromium oxide coating is provided.
Die ausgezeichnete Wirkung dieses Zusatzes bzw. überzuges beruht darauf, daß die Oxyde beim Anheizen der Feuerungen bei etwa 900° C mit dem Korund der Primärausscheidungen reagieren und hochschmelzende Verbindungen, nämlich Nickel-, Chrom- oder Chrom-Nickel-Spinelle bilden. Diese Spinelle zeigen außerdem noch eine sehr geringe Benetzbarkeit durch die geschmolzene Schlacke. Besonders bewährt hat sich die Verwendung von Stampfmassen, die etwa aus 701/o gemahlenem Korund, etwa 10% gepulvertem Nickeloxyd, etwa 17% gemahlenem feuerfestem Kaolin und etwa 3 % gemahlenem Bentonit bestehen.The excellent effect of this additive or coating is based on that the oxides when heating the furnace at about 900 ° C with the corundum of the primary precipitates react and high-melting compounds, namely nickel, chromium or chromium-nickel spinels form. These spinels also show a very low wettability the molten slag. The use of ramming compounds has proven particularly useful, those made from about 701 / o ground corundum, about 10% powdered nickel oxide, about 17% ground refractory kaolin and about 3% ground bentonite.
Soll die Stampfmasse mit einem Oxydüberzug versehen werden, so hat sich z. B. folgende Zusammensetzung für die Masse hervorragend bewährt: Etwa 80% gemahlener Korund, etwa 1.71/o gemahlener feuerfester Kaolin und etwa 31/o gemahlener Bentonit. Diese Stampfmasse wird mit einem Schutzanstrich versehen, der dadurch hergestellt worden ist, daß in 1 1 einer 25 %igen Dextrinlösung 2,5 bis 10,0 kg gepulvertes Nickeloxyd aufgeschlämmt werden.If the rammed earth is to be provided with an oxide coating, so has z. B. the following composition has proven to be excellent for the mass: About 80% ground corundum, about 1.71 / o ground refractory kaolin and about 31 / o ground Bentonite. This rammed earth is provided with a protective coating, which thereby has been produced that in 1 1 of a 25% dextrin solution 2.5 to 10.0 kg powdered nickel oxide can be slurried.
Für die Stampfmasse oder den Schutzanstrich kann statt Nickeloxyd auch Chromoxyd oder ein beliebiges Gemisch beider Oxyde genommen werden. Das Anmachen der Stampfmasse erfordert auf 100 kg Masse etwa 81 Wasser. Es hat 24 Stunden vor dem Einbringen der Masse in den Schmelzkammerkessel zu erfolgen. Während dieser Zeit ist die Masse mit nassem Papier oder Tüchern abzudecken.For the ramming mass or the protective coating, nickel oxide can be used instead chromium oxide or any mixture of both oxides can also be used. The turn on The ramming mass requires about 81 water per 100 kg mass. It has 24 hours before the introduction of the mass into the melting chamber boiler. During this Time to cover the mass with wet paper or cloths.
Claims (4)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB58614A DE1136923B (en) | 1960-07-15 | 1960-07-15 | Process for the protection of furnaces against attack by slag |
| GB1240861A GB975329A (en) | 1960-04-11 | 1961-04-06 | Improvements in or relating to furnace protection materials |
| BE602442A BE602442A (en) | 1960-04-11 | 1961-04-11 | Process for protecting the fayers against slag attack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB58614A DE1136923B (en) | 1960-07-15 | 1960-07-15 | Process for the protection of furnaces against attack by slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1136923B true DE1136923B (en) | 1962-09-20 |
Family
ID=6972144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB58614A Pending DE1136923B (en) | 1960-04-11 | 1960-07-15 | Process for the protection of furnaces against attack by slag |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1136923B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2640927A1 (en) * | 1975-09-08 | 1977-03-10 | Dresser Ind | MONOLITHIC REFRACTORY MATERIAL |
-
1960
- 1960-07-15 DE DEB58614A patent/DE1136923B/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2640927A1 (en) * | 1975-09-08 | 1977-03-10 | Dresser Ind | MONOLITHIC REFRACTORY MATERIAL |
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