DE1926642B2 - Process for the production of lightweight refractory bodies from silicon carbide with aggregate - Google Patents
Process for the production of lightweight refractory bodies from silicon carbide with aggregateInfo
- Publication number
- DE1926642B2 DE1926642B2 DE19691926642 DE1926642A DE1926642B2 DE 1926642 B2 DE1926642 B2 DE 1926642B2 DE 19691926642 DE19691926642 DE 19691926642 DE 1926642 A DE1926642 A DE 1926642A DE 1926642 B2 DE1926642 B2 DE 1926642B2
- Authority
- DE
- Germany
- Prior art keywords
- mixture
- bodies
- silicon carbide
- aggregate
- perlite
- 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.)
- Granted
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
- C04B35/515—Shaped 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
- C04B35/56—Shaped 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 carbides or oxycarbides
- C04B35/565—Shaped 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 carbides or oxycarbides based on silicon carbide
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Ceramic Products (AREA)
Description
3 43 4
sind über Zuleitungen 10 gespeiste, auf den die Kam- kende Gemenge mit Sicherheit gleichmäßig mit Binder durchsinkenden Gutstrom ausgerichtete. Düsen 9 demittel benetzt wird.are fed via feed lines 10, onto which the bottom mixture is sure to be evenly filled with binder Sinking flow of material aligned. Nozzles 9 demittel is wetted.
zur Einspritzung des flüssigen Bindemittels angeord- Das gleichmäßig benetzte Gemenge fängt sich in net. Den unteren Abschluß der Fallkammer 8 bildet den Sammelraum 11 und wird durch die Förderein Sammelraum 11, der trichterförmig in einen Ka- 5 schnecke 13 einer üblichen Formgebungseinrichtung nal 12 mit einer darin befindlichen Abförder- zur Herstellung der Formlinge zugeführt. Anschlieschnecke 13 übergeht. Das zur Schnecke gelangte, ßend werden die Formlinge etwa bei Raumtemperamit Bindemittel benetzte Mischgut wird dann, was je- tür getrocknet, wobei die Trocknung an der Luft doch nicht weiter dargestellt ist, einer Preßeinrich- oder in einem temperierten Raum vorgenommen rung zur Herstellung von Formungen zugeleitet. i° werden kann. Es kann aber auch eine beheiztearranged for the injection of the liquid binder. The evenly wetted mixture is caught in net. The lower end of the fall chamber 8 forms the collecting space 11 and is conveyed by the conveyor Collecting space 11, which is funnel-shaped into a 5 worm gear 13 of a conventional shaping device nal 12 with a discharge device located therein for the production of the moldings. Connecting screw 13 passes. That reached to the screw, the briquettes are ßend about at room temperature Mixture wetted with binding agent is then dried, whatever the door, drying in the air but not shown further, made in a press facility or in a temperature-controlled room tion for the production of moldings. i ° can be. But it can also be heated
Der Ablauf des erfindungsgemäßen Verfahrens zur Trocknungsanlage verwendet werden, wobei eineThe sequence of the method according to the invention can be used for the drying system, with a
Herstellung eines hochfeuerfesten Körpers, der min- Trocknungstemperatur von 200 bis 300° C mit 2 bisManufacture of a highly refractory body, the min drying temperature of 200 to 300 ° C with 2 to
destens ein extrem niedriges Gewicht sowie verbes- 3 m/s Trocknungsluftumwälzung bei einer abnehmen-at least an extremely low weight as well as an improved 3 m / s drying air circulation with a decreasing
serte Bruch- und Abbrandfestigkeit aufweist, ist fol- den relativen Luftfeuchtigkeit von 92 bis 50 0Zohas breaking and burning resistance, the relative humidity is from 92 to 50 0 Zo
gendennaßen: 15 zweckmäßig ist. Die Gefahr von Oberflächenrissengendennaßen: 15 is appropriate. The risk of surface cracks
Als Ausgangsstoff wird pulverisiertes oder gekörn- auf den Körpern besteht nicht.Powdered or granular is not used as the starting material on the bodies.
tes Siliciumcarbid verwendet, das über die Zuförder- Für spezielle Zwecke ist es vorteilhaft, die getrockeinrichtungl in den sich drehenden Trichter3 gege- neten bzw. abgebundenen Körper, z.B. Steine oder ben wird. Über die Zufördereinrichtung 2 werden Platten, noch einer besonderen Wärmebehandlung zu sämtliche Zuschlagstoffe gleichzeitig zugefördert, ao unterwerfen. Diese besteht darin, daß das Perlitema-■wobei für jeden Zuschlagstoff eine eigene Förderein- terial aus dem Randbereich des abgebundenen Körrichtung 2 vorgesehen ist. Die Zuschlagstoffe beste- pers herausgeschmolzen wird, wodurch der Randbehen unter anderem aus den bekannten Gesteinsmeh- reich porös wird. Dies hat eine weitere Gewichtsminien wie z.B. Cristobalit und/oder Quarzit und/oder derung sowie eine gesteigerte Hitzeabwehr der hochgeblähter Glimmer. 25 feuerfesten Körper zur Folge. Die Ausschmelztiefetes silicon carbide is used, which is for special purposes it is advantageous to use the drying device Bodies, e.g. stones or, that are placed in the rotating funnel3 or tied off will practice. Plates are subjected to a special heat treatment via the feed device 2 all aggregates fed in at the same time, subject to ao. This consists in the fact that the perlitema- ■ being for each aggregate a separate conveying material from the edge area of the bound grain direction 2 is provided. The aggregates are best-melted out, causing the marginal bees among other things becomes porous from the known rock pile. This has another weight minimization such as cristobalite and / or quartzite and / or derung as well as an increased heat resistance of the distended Mica. 25 refractory bodies result. The melt-out depth
Erfindungsgemäß wird als neuer Zuschlagstoff ist je nach Erfordernis steuerbar.According to the invention, the new aggregate is controllable as required.
Perlite mit einem spezifischen Gewicht von 70 kg/ms Nachstehend ist eine Reparatur angegeben, welchePerlite with a specific weight of 70 kg / m s. Below is a repair indicated which
oder etwa diesem Wert zugemischt. Der Perlite kann dem erfindungsgemäßen Verfahren zugrunde liegt,or roughly mixed with this value. The perlite can be the basis of the method according to the invention,
auch als alleiniger Zuschlagstoff dienen. Die Gewichtsanteile Siliciumcarbid, Perlite, Quarzit/also serve as the sole aggregate. The proportions by weight of silicon carbide, perlite, quartzite /
Nach einer guten Durchmischung im Trichter 3 ge- 3« Cristobalit und Bindemittel mische man entsprelangt das Gemenge durch da? Rüttelsiebs hindurch chend dem Verhältnis 2:2:1:3. Da Siliciumcarbid, in die Fallkammer 8, wo es einen aufgewirbelten wenn das Bindemittel zugefügt ist, sehr schnell ab- oder schwebeähnlichen Zustand annimmt. Dadurch bindet, muß die Verarbeitung des mit Bindemittel wird eine sehr niedrige Dichte des Gemenges er- benetzten Mischguts bis zur Formgebung des Körreicht, dessen Sinkgeschwindigkeit gering ist. Durch 35 pers schnell ablaufen.After thorough mixing in the funnel 3, the cristobalite and binder are mixed together and the result is obtained the mix through there? Vibrating sieve through the ratio 2: 2: 1: 3. Since silicon carbide, into the fall chamber 8, where a whirled up when the binding agent is added, very quickly or adopts a floating state. This binds, the processing of the binders must a very low density of the mix of wetted mix is achieved up to the shaping of the grain, whose rate of descent is slow. Run off quickly by 35 pers.
die auf diesen Fallstrom ausgelichteten Düsen 9 wird Weitere Vorteile der Erfindung liegen darin, daß dann das Bindemittel in die Kammer 8 eingespritzt, bei diesem Verfahren keine Staub- und Geruchsbelä- und zwar so, daß das flüssige Bindemittel, z. B. Poly- stigungen auftreten, wobei auch der fertige feuerfeste kieselsäure oder Alkalisilikate, in an sich bekannter Körper bei stärkster Hitzebelastung nahezu geruch-Weise hochgradig vernebelt wird. Hierdurch wird er- 40 los bleibt. Auch treten bei diesem Körper bei Hitzereicht, daß das die Fallkammer senkrecht durchsin- belastungen keine Rußerscheinungen auf.the nozzles 9 exposed to this downdraft flow. Further advantages of the invention are that then the binding agent is injected into the chamber 8, with this process no dust and odor pollution in such a way that the liquid binder, e.g. B. Polystungen occur, with the finished refractory Silicic acid or alkali silicates, in a body known per se, almost odor-wise under the strongest heat load is highly fogged. This leaves 40 lost. Also occur in this body at high temperatures, that the drop chamber does not show any soot phenomena.
Claims (4)
kennzeichnet, daß das Gemenge aufgewirbelt Der neue Zuschlagstoff Perlite, der ein sehr gerin- oder in einen schiebeähnlichen Zustand überge- ges spezifisches Gewicht aufweist, wird in pulveriführt, daß das Bindemittel in das langsam absin- 15 sierter oder feinkörniger Form den übrigen Gemenkende Gemenge in an sich bekannter Weise ver- gebestandteilen beigegeben. Nach an sich bekannten düst und daß das mit Bindemittel benetzte, aufge- Verfahrensmerkmalen wird dann so vorgegangen, fangene Gemenge mittels einer Schneckenförder- daß das Gemenge aufgewirbelt oder in einen schweeinrichtung seitlich abgefördert wird. beähnlichen Zustand übergeführt, daß das Bindemit-2. The method according to claim 1, thereby given bodies produced by the method,
indicates that the mixture is whirled up. The new aggregate perlite, which has a very low or a sliding-like specific gravity, is powdered so that the binding agent is slowly absorbed or fine-grained into the rest of the mixture included in a known manner. According to a known jet and that the mixture is wetted with binding agent and is then proceeded in such a way that the mixture is caught by means of a screw conveyor, that the mixture is whirled up or conveyed away to the side in a welding device. similar condition that the binding agent
trocknet wird. Es ist bekannt, bei der Herstellung Die Erfindung ist nachstehend an einem Ausfüh-Development of lighter refractory bodies, according to which a heated drying system is no longer necessary, based or fine-grained silicon carbide and at least a sufficient and rapid drying of at least one aggregate with the addition of a binding body can also be achieved at room temperature, whereupon the wetted speech. At the same time, however, a heated dry quantity can be conveyed into a form, compressed and used as a recovery system.
is drying. It is known that in the manufacture of the invention, the following is based on an embodiment
Zuschlagstoffe wie Cristobalit und/oder Quarzit so- Zunächst wird die Vorrichtung beschrieben, dieof highly refractory bodies for the interior lining 40 explained in more detail. The drawing shows manure of industrial furnaces, crucibles, etc. pulverized to use a device for carrying out the inventive or fine-grain silicon carbide, the method according to the invention in longitudinal section.
Aggregates such as cristobalite and / or quartzite so- First, the device will be described, the
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691926642 DE1926642C3 (en) | 1969-05-24 | 1969-05-24 | Process for the production of lightweight refractory bodies from silicon carbide with aggregate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691926642 DE1926642C3 (en) | 1969-05-24 | 1969-05-24 | Process for the production of lightweight refractory bodies from silicon carbide with aggregate |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1926642A1 DE1926642A1 (en) | 1970-11-26 |
DE1926642B2 true DE1926642B2 (en) | 1974-04-25 |
DE1926642C3 DE1926642C3 (en) | 1974-11-21 |
Family
ID=5735139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691926642 Expired DE1926642C3 (en) | 1969-05-24 | 1969-05-24 | Process for the production of lightweight refractory bodies from silicon carbide with aggregate |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1926642C3 (en) |
-
1969
- 1969-05-24 DE DE19691926642 patent/DE1926642C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1926642A1 (en) | 1970-11-26 |
DE1926642C3 (en) | 1974-11-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
EHJ | Ceased/non-payment of the annual fee |