DE343264C - - Google Patents
Info
- Publication number
- DE343264C DE343264C DENDAT343264D DE343264DA DE343264C DE 343264 C DE343264 C DE 343264C DE NDAT343264 D DENDAT343264 D DE NDAT343264D DE 343264D A DE343264D A DE 343264DA DE 343264 C DE343264 C DE 343264C
- Authority
- DE
- Germany
- Prior art keywords
- furnace
- rotary kiln
- phase
- water
- melting
- 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
- 238000000034 method Methods 0.000 claims description 6
- 229910001570 bauxite Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- SMYKVLBUSSNXMV-UHFFFAOYSA-J aluminum;tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-J 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000015450 Tilia cordata Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 239000002918 waste heat Substances 0.000 claims 1
- 238000002844 melting Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 241000005139 Lycium andersonii Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 230000001590 oxidative Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 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
- C22B21/0007—Preliminary treatment of ores or scrap or any other metal source
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Verfahren zur Gewinnung von Kalziumaluminat. In den bereits bekannten Verfahren zur Zubereitung von Kalziumaluminat zwecks Herstellung von reinem Aluminium beginnt man. damit, den Bauxit und den Kalkstein in feuchtem Zustand sehr fein zu zerkleinern und innig zu mischen. Der Brei, welcher 4.o bis 5o Prozent Wasser enthält, wird dann in einen Drehofen eingeführt. Das Wasser wird in diesem Ofen verdampft, wobei die Temperatur derart begrenzt werden muß, daß eine Sinterung oder Schmelzung der zu brennenden Masse vermieden und ferner verhütet wird, daß die Masse sich an den Wänden des Ofens ansetzt, woraus verschiedene Nachteile' entstehen würden.Process for the production of calcium aluminate. In the already known Process for the preparation of calcium aluminate for the production of pure aluminum one begins. so that the bauxite and limestone are very fine when they are wet grind and mix thoroughly. The pulp, which contains 4 to 5 percent water, is then introduced into a rotary kiln. The water is evaporated in this oven, the temperature must be limited in such a way that sintering or melting the mass to be burned is avoided and it is also prevented that the mass is attached attaches to the walls of the furnace, which would result in various disadvantages.
Unter diesen Bedingungen gelingt es, aus dem so behandelten Material, wenn dasselbe in Berührung mit einer sodahaltigen Lösung gebracht wird, einen. Bruchteil löslichen Aluminats zu gewinnen, der ungefähr 41, oder des in dem Bauxit enthaltenen Aluminiums darstellt.Under these conditions it is possible to convert the material treated in this way into if it is brought into contact with a solution containing soda, one. Fraction to obtain soluble aluminate, which is about 41, or that contained in the bauxite Represents aluminum.
Außerdem verursacht die Bindung von Schwefel aus den Heizgasen einen Verlust an Soda in den Lösungen durch) Bildung von Natriumsulfat.In addition, the binding of sulfur from the heating gases causes one Loss of soda in the solutions due to) formation of sodium sulphate.
Bei dem den Gegenstand der Erfindung bildenden Verfahren werden der Bauxit und der Kalkstein nur trocken, grob zerkleinert oder gemahlen und dann in. den Drehofen eingebracht, dessen Temperatur so weit verringert wird, daß sie immer unterhalb der Sinterungstemperatur bleibt.In the process forming the subject of the invention Bauxite and the limestone only dry, coarsely crushed or ground and then in. introduced the rotary kiln, the temperature of which is reduced so far that it always remains below the sintering temperature.
Das bearbeitete Material fällt in einen zweiten Ofen beliebiger, geigneter Art (rotierender Ofen, Flammofen, Ofen reit Wassermantel, elektrischer Ofen o. dgl.), in dem nun die vollständige Schmelzung des Materials herbeigeführt wird. Das austretende Gut wird in Wasser abgeschreckt und gekörnt.The processed material falls into a second furnace of any suitable type Type (rotating furnace, flame furnace, furnace riding water jacket, electric furnace or the like), in which the complete melting of the material is brought about. The exiting Well is quenched and grained in water.
Durch die Schmelzung wird eine vollkommene Verbindung herbeigeführt, und es wird infolgedessen eine weit höhere Ausbeute erhalten, die bis zu "I-/12 des im Bauxit enthaltenen Aluminiums steigt. Die Schmelzung erfolgt in einer oxydierenden oder neutralen Atmosphäre, und bei der Temperatur des Arbeitsganges wird der schwefelsaure Kalk zersetzt, so daß der Schwefel fast gänzlich ausgeschieden wird.The melting creates a perfect connection, and consequently a far higher yield, up to "I- / 12 of the aluminum contained in bauxite increases. The melting takes place in an oxidizing or neutral atmosphere, and at the temperature of the process the acid becomes sulfuric Lime decomposes so that almost all of the sulfur is excreted.
Die Mehrausgaben an Brennstoff für die Schmelzung werden zum mehr oder weniger großen Teile dadurch ausgeglichen, daß die Wasserverdampfung fortfällt. Der rotierende Ofen wird von den Gasen hoher Temperatur geheizt, welche aus dem Schmelzofen kommen. Unabhängig davon kann durch Kohlenstaubfeuerung die Wärmezufuhr ergänzt werden, falls erforderlich, um das Material gut vorgebrannt in den Schmelzofen eintreten zu lassen.The additional expenditure on fuel for smelting becomes more or less large parts compensated by the fact that the water evaporation does not occur. The rotating furnace is heated by the high temperature gases emitted from the Come melting furnace. Regardless of this, the heat supply can be achieved through pulverized coal firing if necessary, the material is well pre-fired in the melting furnace to let enter.
Die wesentlichen Vorteile des Verfahrens sind also .die folgenden: wesentliche Ersparnis beim Zerkleinern, wesentliche Erhöhung der Ausbeutung, Vermeidung des Verlustes an Soda in den Lösungen infolge Verschwefelung.The main advantages of the process are therefore the following: substantial savings in crushing, substantial increase in exploitation, avoidance the loss of soda in the solutions due to sulphurization.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE343264C true DE343264C (en) |
Family
ID=572655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT343264D Active DE343264C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE343264C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2615590A1 (en) * | 1975-07-23 | 1977-02-17 | Tatabanyai Szenbanyak | PROCESS FOR THE PRODUCTION OF HIGHLY PURE CLAY AND, IF APPLICABLE, CEMENT |
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0
- DE DENDAT343264D patent/DE343264C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2615590A1 (en) * | 1975-07-23 | 1977-02-17 | Tatabanyai Szenbanyak | PROCESS FOR THE PRODUCTION OF HIGHLY PURE CLAY AND, IF APPLICABLE, CEMENT |
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