DE242311C - - Google Patents
Info
- Publication number
- DE242311C DE242311C DENDAT242311D DE242311DA DE242311C DE 242311 C DE242311 C DE 242311C DE NDAT242311 D DENDAT242311 D DE NDAT242311D DE 242311D A DE242311D A DE 242311DA DE 242311 C DE242311 C DE 242311C
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- carbon
- silicon
- silicon carbide
- alloys
- 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.)
- Active
Links
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- HBMJWWWQQXIZIP-UHFFFAOYSA-N Silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910021332 silicide Inorganic materials 0.000 claims description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000010494 dissociation reaction Methods 0.000 claims description 2
- 230000005593 dissociations Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- -1 aluminum-silicon Chemical compound 0.000 description 4
- PZZYQPZGQPZBDN-UHFFFAOYSA-N Aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 3
- 229910000676 Si alloy Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- BUKHSQBUKZIMLB-UHFFFAOYSA-L potassium;sodium;dichloride Chemical compound [Na+].[Cl-].[Cl-].[K+] BUKHSQBUKZIMLB-UHFFFAOYSA-L 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/02—Obtaining aluminium with reducing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Durch Reduktion oder Elektrolyse von Aluminiumsilikat, Kaolin oder aluminiumsilikathaltigen Rohmaterialien, wie gewöhnlicher Ton usw., kann man leicht eine Legierung von Aluminium mit Silicium und gegebenenfalls anderen im Rohmaterial vorhandenen Metallen, z.B. Eisen usw., erhalten.By reduction or electrolysis of aluminum silicate, kaolin or those containing aluminum silicate Raw materials, such as ordinary clay, etc., can easily be an alloy of aluminum with silicon and optionally other metals present in the raw material, e.g. iron, etc.
Um aus diesen Legierungen ein unmittelbar verwendbares Metall zu erhalten, muß dasIn order to obtain a metal that can be used immediately from these alloys, it must be
ίο Silicium entfernt werden, was eine mit großen Schwierigkeiten verbundene technische Aufgabe darstellt. Erfinder haben nun die überraschende Beobachtung gemacht, daß, wenn bei der Herstellung von Aluminium-Siliciumlegierungen aus Silikaten durch Reduktion mittels Kohle ein Überschuß an Kohlenstoff benutzt wird, in den entweichenden Gasen Dämpfe von metallischem Aluminium auftreten. Diese Beobachtung wird nun gemäß der vorliegenden Erfindung zur Gewinnung von metallischem Aluminium aus Aluminium-Siliciumlegierungen in der Weise verwertet, daß die Alummium-Siliciumlegierungen mit Kohlenstoff oder kohlenstoffreichen Materialien (z. B. Kohlenwasserstoffen) bei hoher Temperatur behandelt werden, welche jedoch etwas unterhalb der Dissoziationstemperatur des sich bildenden Siliciumcarbids verbleiben muß. ■ίο silicon to be removed, what one with great Difficulties related technical problem. Inventors now have the surprising Observation made that when in the manufacture of aluminum-silicon alloys an excess of carbon is used from silicates by reduction with coal in the escaping gases Metallic aluminum fumes occur. This observation is now made for recovery in accordance with the present invention of metallic aluminum from aluminum-silicon alloys recycled in such a way that that the aluminum-silicon alloys with carbon or carbon-rich materials (e.g. hydrocarbons) are treated at high temperature, which, however remain somewhat below the dissociation temperature of the silicon carbide being formed got to. ■
Der durch dieses neue Verfahren erzielte technische Fortschritt besteht insbesondere darin, daß ermöglicht ist, ganz reines Aluminium auf billige Weise zu gewinnen. Das Verfahren kann auch in der Weise ausgeführt werden, daß das Aluminiumsilicid in einer Atmosphäre von kohlenstoffreichem Dampf oder Gas (Kohlenwasserstoffe, Leuchtgas) verdampft wird, oder daß Aluminium-Siliciumdämpfe über Kohlenstoff in fester Form geleitet werden. ■ . ■The technical progress achieved by this new process exists in particular in that it is possible to obtain completely pure aluminum in a cheap way. That The method can also be carried out in such a way that the aluminum silicide in a Atmosphere of carbon-rich vapor or gas (hydrocarbons, luminous gas) evaporates or that aluminum-silicon vapors passed over carbon in solid form will. ■. ■
Die sich ergebenden beiden Reaktionsprodukte, Aluminium, gegebenenfalls in Legierung mit anderen gleichzeitig vorhandenen Metallen und Siliciumkarbid, können leicht auf mechanischem Wege voneinander getrennt werden, z. B. durch Niederschmelzen des Metalles unter einer Schlackenschicht (z: B. Natrium-Kaliumchlorid), in welcher das Siliciumkarbid in Suspension bleibt, und aus welcher es durch Auflösen der Schlacke in Wasser zurückgewonnen werden kann.The resulting two reaction products, aluminum, optionally in alloy with other coexisting metals and silicon carbide, can easily be on mechanical Paths are separated from each other, e.g. B. by melting down the metal a slag layer (e.g. sodium-potassium chloride) in which the silicon carbide in Suspension remains, and from which it is recovered by dissolving the slag in water can be.
Zweckmäßig führt man das neue Verfahren in unmittelbarem Anschluß an die Gewinnung des Aluminiumsilicides aus, wodurch eine große Energieersparnis erzielt wird, indem das Silicid, insbesondere wenn durch Reduktion von Silikaten gewonnen, vorn vornherein im Besitz ungefähr derjenigen Wärmemenge und Temperatur ist, welche für die nachfolgende Reaktion mit Kohlenstoff erforderlich sind.The new process is expediently carried out immediately after the extraction of the aluminum silicide, whereby a large energy saving is achieved by using the silicide, in particular if obtained by reducing silicates, owned from the start is approximately the amount of heat and temperature required for the subsequent reaction with carbon are required.
Das neue Verfahren kann auch mit der Reduktion des Silikates kombiniert werden, indem man die entsprechend höhere Menge von Kohlenstoff in der Beschickung vorsieht.The new process can also be combined with the reduction of the silicate, by including the correspondingly higher amount of carbon in the feed.
Die Reaktion verläuft dann wahrscheinlich nach der folgenden Gleichung:The reaction then probably proceeds according to the following equation:
Al2 Si2O, + 9 C = Al2 + Si2C2 + 7 CO. Al 2 Si 2 O, + 9 C = Al 2 + Si 2 C 2 + 7 CO.
Im letzteren Falle wird das ganze Verfahren zweckmäßig in einem Druckofen durchgeführt, welcher ein Widerstands-Induktions- oder Elektrodenofen oder auch ein nicht elektrischer Ofen sein mag.In the latter case, the whole process is expediently carried out in a pressure furnace, which is a resistance induction or electrode furnace or a non-electric one Oven may be.
Der Zusatz gewisser Salze, wie der genannten Chloride, fördert die Reaktion.The addition of certain salts, such as the chlorides mentioned, promotes the reaction.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE242311C true DE242311C (en) |
Family
ID=501530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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Country Status (1)
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DE (1) | DE242311C (en) |
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