DE1583262C2 - Silicon carbide-containing moldings for cupolas - Google Patents
Silicon carbide-containing moldings for cupolasInfo
- Publication number
- DE1583262C2 DE1583262C2 DE1583262A DE1583262A DE1583262C2 DE 1583262 C2 DE1583262 C2 DE 1583262C2 DE 1583262 A DE1583262 A DE 1583262A DE 1583262 A DE1583262 A DE 1583262A DE 1583262 C2 DE1583262 C2 DE 1583262C2
- Authority
- DE
- Germany
- Prior art keywords
- silicon carbide
- sic
- silicon
- cupolas
- sio
- 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
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 22
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 22
- 238000000465 moulding Methods 0.000 title claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 239000000969 carrier Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 230000002378 acidificating effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000010944 pre-mature reactiony Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Description
Die Erfindung betrifft Siliciumkarbid enthaltende Formlinge als Siliciumträger auf der Grundlage von mit basischen Stoffen gebundenen Siliciumkarbidstücken für Kupolöfen.The invention relates to silicon carbide-containing moldings as silicon carriers based on Pieces of silicon carbide bonded with basic substances for cupola furnaces.
Es ist bekannt, derartige Siliciumträger der Beschickung des Kupolofens zuzufügen. Dabei werden als Siliciumkarbid enthaltende Materialien SiC-Kapsel- und Brennplattenscherben aus der keramischen Industrie oder auch keramisch gebundener SiC-haltiger Schleifscheibenbruch usw. verwendet. Es hat sich jedoch gezeigt, daß offensichtlich allein die Anwesenheit eines basischen Bindemittels unter den Betriebsbedingungen im Kupolofen nicht ausreicht, um eine befriedigende Siliciumausbeute aus Siliciumkarbid zu erzielen.It is known to add such silicon carriers to the charge of the cupola furnace. Be there SiC capsule and burner plate fragments from the ceramic industry as materials containing silicon carbide or ceramic-bonded SiC-containing broken grinding wheels etc. are used. It has however, it was shown that apparently the presence of a basic binder alone under the operating conditions in the cupola is not sufficient to achieve a satisfactory silicon yield from silicon carbide achieve.
Die Erfindung hat sich zur Aufgabe gestellt, einen Siliciumträger zu schaffen, welcher neben den metallurgischen Vorteilen des SiC eine erschöpfende Si- Ausbeute aus Siliciumkarbid und gleichzeitig eine günstige Beeinflussung der Schlackenführung gewährleistet.The invention has set itself the task of creating a silicon carrier, which in addition to the metallurgical Advantages of SiC an exhaustive Si yield from silicon carbide and at the same time a favorable one Influence of the slag guidance guaranteed.
Diese Aufgabe wird erfindungsgemäß durch siliciumkarbidhaltige Formlinge gelöst, die als Siliciumträger auf der Grundlage von mit basischen Stoffen gebundenen, zerkleinerten Siliciumkarbidstücken für KupolöfenAccording to the invention, this object is achieved by silicon carbide-containing moldings which are used as silicon carriers the basis of crushed silicon carbide pieces bound with basic substances for cupola furnaces
15 bis 251Vo SiO.,, 7 bis 3O0ZoAl2O.,,15 to 25 1 Vo SiO. ,, 7 to 3O 0 ZoAl 2 O. ,,
12 bis IS'V'ii CaO als an sich bekanntes Bindemittel, Rest SiC12 to IS'V'ii CaO as a known binder, Remainder SiC
enthalten, wobei außer dem SiC auch die Komponenten SiO2 und AI2O3 jeweils in Form zerkleinerter keramischer Scherben vorliegen.Contain, in addition to the SiC, the components SiO 2 and Al 2 O 3 are each in the form of comminuted ceramic shards.
Es hat sich überraschenderweise herausgestellt, daß ein praktisch vollständiges Siiiciumausbringen bei Rinnentemperaturen im Kupolofen, die in diesem Fall bei ungefähr 152O0C liegen müssen, erzielbar ist, wenn dem Siliciumträger Al2O3 und SiO2 zu dem Bindemittel CaO zugegeben wird. Der SiO2-Zuschlag bringt ferner eine Einsparung von etwa 20°/0 Ofenfutter im sauren Kupolofen mit sich. Durch den Zuschlag von Al2O3 wird insbesondere die Schlacke besser fließbar.It has surprisingly been found that a practically complete Siiiciumausbringen at trough temperatures in the cupola furnace, which must be in this case at about 152O 0 C, is obtained when the silicon substrate Al 2 O 3 and SiO 2 were added to the binder CaO. The SiO 2 -Zuschlag further yields a saving of about 20 ° / 0 furnace lining in the cupola furnace acid with itself. The addition of Al 2 O 3 in particular makes the slag easier to flow.
Dem Siliciumträger gemäß Erfindung wird das Siliciumdioxyd aus Silicium-Brennplatten und -kapseln zugegeben, wobei Al2O3 gesondert ebenfalls in Form von Brennhilfsmitteln aus der Porzellanindustrie oder anderen Ursprungs beigegeben wird. Das Vorliegen des SiC, SiO2 und Al2O3 in keramischer Form hat den Vorteil, daß einerseits eine energiemäßige Belastung des Schmelzvorgangs vermieden und andererseits ein Niedergehen des SiC im Ofen ohne vorzeitige Reaktionen gewährleistet wird.The silicon dioxide is added to the silicon support according to the invention from silicon burning plates and capsules, with Al 2 O 3 also being added separately in the form of kiln furniture from the porcelain industry or of other origin. The presence of the SiC, SiO 2 and Al 2 O 3 in ceramic form has the advantage that, on the one hand, an energy load on the melting process is avoided and, on the other hand, the SiC is guaranteed to sink in the furnace without premature reactions.
Nachfolgend werden drei besondere Ausführungsformen des Siliciumträgers gemäß Erfindung aufgeführt, welche die nachfolgenden Analysen haben:Three particular embodiments of the silicon carrier according to the invention are listed below, which have the following analyzes:
Wenn sich auch die Al2O3- und SiO2-Gehaite in etwa entsprechend den Analysen der Typen 1, 2, 3 gegeneinander verschieben, ergeben sich in dem genannten Rahmen keine spürbaren Unterschiede im Si-Ausbringen. Beim Preßling Typ 3 liegen für viele Zwecke die Beimengungen im unteren Bereich, um den entsprechenden Silicierungswirkungsgrad zu erreichen. If the Al 2 O 3 and SiO 2 contents also shift relative to one another roughly in accordance with the analyzes of types 1, 2, 3, there are no noticeable differences in the Si yield within the framework mentioned. In the type 3 compact, the admixtures are in the lower range for many purposes in order to achieve the corresponding siliconization efficiency.
Die Raumform der in den Kupolofen eingebrachten Siliciumträger gemäß Erfindung ist grundsätzlich unwesentlich, wenn sich auch die Ausbildung als Preßling mit gleichbleibendem Nutzinhalt als besonders vorteilhaft erwiesen hat.The three-dimensional shape of the silicon carriers introduced into the cupola according to the invention is fundamental insignificant, even if the training as a compact with constant usable content turns out to be special has proven beneficial.
Der Si-Träger gemäß Erfindung kann sowohl für saure als auch für basische Kupolöfen verwendet werden. Falls der Träger für basische Kupolöfen eingesetzt werden soll, liegen die Gehalte an Al2O3 im oberen Grenzbereich, beispielsweise bei 20 bis 30 Gewichtsprozent, bezogen auf die Gesamtmasse.The Si support according to the invention can be used for both acidic and basic cupola furnaces. If the carrier is to be used for basic cupolas, the Al 2 O 3 contents are in the upper limit range, for example 20 to 30 percent by weight, based on the total mass.
Claims (1)
7 bis 30°/o AUÖ.J,
12 bis 15°/« CaO als an sich bekanntes15 to 25 1 VoSiO ,,
7 to 30 ° / o AUÖ.J,
12 to 15% CaO as known per se
Rest SiC,Binder,
Remainder SiC,
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1583262A DE1583262C2 (en) | 1967-07-06 | 1967-07-06 | Silicon carbide-containing moldings for cupolas |
DK326768AA DK119514B (en) | 1967-07-06 | 1968-07-03 | Silicon carrier for cupola furnaces. |
SE09294/68A SE355033B (en) | 1967-07-06 | 1968-07-05 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1583262A DE1583262C2 (en) | 1967-07-06 | 1967-07-06 | Silicon carbide-containing moldings for cupolas |
DEK0062745 | 1967-07-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1583262B1 DE1583262B1 (en) | 1969-09-18 |
DE1583262C2 true DE1583262C2 (en) | 1974-09-12 |
Family
ID=25753250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1583262A Expired DE1583262C2 (en) | 1967-07-06 | 1967-07-06 | Silicon carbide-containing moldings for cupolas |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1583262C2 (en) |
DK (1) | DK119514B (en) |
SE (1) | SE355033B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0046991A1 (en) * | 1980-09-03 | 1982-03-10 | Werner Kessl Giessereibedarf GmbH | Process and briquette for homogenizing molten cast iron |
DE3115156A1 (en) * | 1981-04-15 | 1982-10-28 | Frank & Schulte Gmbh, 4300 Essen | Alloy moulding for cupola furnaces |
DE3200946C1 (en) * | 1982-01-14 | 1983-08-25 | Gesellschaft für Metallurgie Hafner und Polte mbH, 4000 Düsseldorf | Moulding for charging cupola furnaces or similar melting furnaces |
DE2727896C2 (en) * | 1977-06-21 | 1984-08-23 | Keßl, Werner, 8481 Bärnwinkel | Use of silicon carbide compacts as a cupola additive |
DE3527600C1 (en) * | 1985-08-01 | 1986-11-06 | Gesellschaft für Metallurgie Hafner und Polte mbH, 4000 Düsseldorf | A process for seeding a cupola furnace melt and moulding for use in this process |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007051934A1 (en) | 2007-10-29 | 2009-04-30 | Mfg Metall- Und Ferrolegierungsgesellschaft Mbh Hafner, Blondin & Tidou | Treating waste obtained in the preparation of workpieces made of elementary silicon, comprises mixing the waste with carbon and heating the obtained mixture for a long time until the elementary silicon is converted into silicon carbide |
DE102010031101A1 (en) | 2010-07-08 | 2012-01-12 | Mfg Metall- Und Ferrolegierungsgesellschaft Mbh Hafner, Blondin & Tidou | Process for the production of alloy moldings |
-
1967
- 1967-07-06 DE DE1583262A patent/DE1583262C2/en not_active Expired
-
1968
- 1968-07-03 DK DK326768AA patent/DK119514B/en not_active IP Right Cessation
- 1968-07-05 SE SE09294/68A patent/SE355033B/xx unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2727896C2 (en) * | 1977-06-21 | 1984-08-23 | Keßl, Werner, 8481 Bärnwinkel | Use of silicon carbide compacts as a cupola additive |
EP0046991A1 (en) * | 1980-09-03 | 1982-03-10 | Werner Kessl Giessereibedarf GmbH | Process and briquette for homogenizing molten cast iron |
DE3115156A1 (en) * | 1981-04-15 | 1982-10-28 | Frank & Schulte Gmbh, 4300 Essen | Alloy moulding for cupola furnaces |
DE3200946C1 (en) * | 1982-01-14 | 1983-08-25 | Gesellschaft für Metallurgie Hafner und Polte mbH, 4000 Düsseldorf | Moulding for charging cupola furnaces or similar melting furnaces |
DE3527600C1 (en) * | 1985-08-01 | 1986-11-06 | Gesellschaft für Metallurgie Hafner und Polte mbH, 4000 Düsseldorf | A process for seeding a cupola furnace melt and moulding for use in this process |
Also Published As
Publication number | Publication date |
---|---|
SE355033B (en) | 1973-04-02 |
DK119514B (en) | 1971-01-18 |
DE1583262B1 (en) | 1969-09-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
8310 | Action for declaration of annulment | ||
8313 | Request for invalidation rejected/withdrawn | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: KESSL, GUNTER, 8484 GRAFENWOEHR, DE |