DE82980C - - Google Patents
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- Publication number
- DE82980C DE82980C DENDAT82980D DE82980DA DE82980C DE 82980 C DE82980 C DE 82980C DE NDAT82980 D DENDAT82980 D DE NDAT82980D DE 82980D A DE82980D A DE 82980DA DE 82980 C DE82980 C DE 82980C
- Authority
- DE
- Germany
- Prior art keywords
- iron oxide
- oxide
- chromate
- lime
- iron
- 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.)
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910000460 iron oxide Inorganic materials 0.000 claims description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000015450 Tilia cordata Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 230000029087 digestion Effects 0.000 claims description 2
- 239000011135 tin Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 7
- NUJOXMJBOLGQSY-UHFFFAOYSA-N Manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- HEQBUZNAOJCRSL-UHFFFAOYSA-N Iron(II) chromite Chemical compound [O-2].[O-2].[O-2].[Cr+3].[Fe+3] HEQBUZNAOJCRSL-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000002386 leaching Methods 0.000 description 3
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- RFAFBXGYHBOUMV-UHFFFAOYSA-N Calcium chromate Chemical compound [Ca+2].[O-][Cr]([O-])(=O)=O RFAFBXGYHBOUMV-UHFFFAOYSA-N 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910000468 manganese oxide Inorganic materials 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese(II,III) oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- ALMAEWAETUQTEP-UHFFFAOYSA-N sodium;chromium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Cr+3] ALMAEWAETUQTEP-UHFFFAOYSA-N 0.000 description 2
- 229910000669 Chrome steel Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- PXLIDIMHPNPGMH-UHFFFAOYSA-N Sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- UBUHAZKODAUXCP-UHFFFAOYSA-N iron(2+);oxygen(2-);hydrate Chemical compound O.[O-2].[Fe+2] UBUHAZKODAUXCP-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/14—Chromates; Bichromates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Das vorliegende Verfahren zum Aufschliefsen sauerstoffhaltiger Chrom-, Mangan- und Zinnerze durch oxydirendes Rösten in Gegenwart von Alkalicarbonaten kennzeichnet sich durch den Ersatz des üblichen Kalkzusatzes durch Eisenoxyd zum Zwecke der Vermeidung unverwerthbarer Rückstände, sowie der Verluste an unaufgeschlossen gebliebenem Erz und der Auslaugung entgangenem Chromat bezw. der Bildung unlöslichen Calciumchromates.The present process for the disintegration of oxygenated chromium, manganese and tin ores by oxidizing roasting in the presence of alkali carbonates is characterized by the replacement of the usual addition of lime by iron oxide in order to avoid unusable Residues, as well as the losses of undigested ore and the chromate escaped leaching respectively. the Formation of insoluble calcium chromate.
Der Kalkzusatz bezweckt wesentlich die Kaustificirung der Soda bezw. die Umwandlung derselben in Natriumoxyd, indem das Ferrochromit nur mit stark alkalischen Basen in zufriedenstellender Weise reagirt. Dieser Kalkzusatz hat in grofsem Ueberschufs stattzufinden und führt zu einer grofsen Masse unverwerthbaren Rückstandes, mit welchem alles in demselben enthaltene unzersetzte Erz und nicht in Chromat übergeführtes Chrom-oxyd weggeworfen werden mufs; aufserdem finden Verluste an Chromat statt, indem sich die Auslaugung nicht bis zur völligen Erschöpfung treiben läfst, andererseits auch stets zur Bildung einer gewissen Menge schwer löslichen Calciumchromates führt, welches sich auch durch Behandlung mit kohlensaurem Alkali nicht völlig in Alkalichromat überführen läfst.The purpose of the addition of lime is essentially the causticization of the soda or the transformation the same in sodium oxide, in which the ferrochromite only with strongly alkaline bases reacts in a satisfactory manner. This addition of lime must take place in great excess and leads to a great mass of indestructible residue, with which all of the undecomposed ore contained in it and chromium oxide not converted into chromate must be thrown away; besides Loss of chromate takes place by not leaching to complete exhaustion drift, on the other hand always to the formation of a certain amount of poorly soluble Calcium chromates leads, which can also be achieved by treatment with carbonate Alkali cannot be completely converted into alkali chromate.
Die Umwandlung der Soda in ein bei weitem kräftiger alkalinisches Mittel kann man nun in weit vortheilhafterer Weise durch das eigenthümliche Verhalten des Eisenoxydes zu Alkalicarbonat erreichen. Erhitzt man nämlich solches, z. B. Soda, mit Eisenoxyd, so ensteht bekanntlich Natriumferrit Na2 O Fe2 O3, eine Verbindung von ähnlicher Alkalinität wie Natriumoxyd und ,zugleich lockerer Bindung. Röstet man nun ein Gemisch aus Chromeisenstein (Ferrochromit), Alkalicarbonat, z. B. Soda und Eisenoxyd, so tritt zunächst dieses in Reaction mit der Soda unter Bildung von Natriumferrit, worauf dieses infolge seiner kräftigen Alkalinität auf das Ferrochromit spaltend einwirkt und dabei selbst zerfällt, so dafs sich Natriumchromit bildet unter Freiwerden des Oxydgehaltes des Natriumferrits, sowie des Eisenoxydulgehaltes des Ferrochromits. Das Natriumchromit sowie das Eisenoxydul oxydiren sich mit dem Sauerstoff der Luft bezw. zu Natriumchromat und Eisenoxyd. Das Auslaugen der Röstmasse hiriterläfst nunmehr einen Rückstand, der vorwiegend aus Eisenoxydhydrat und Eisenoxyd mit dem unzersetzten Erzrest besteht und leicht rein erhalten werden kann, indem man mit einem geringen Alkaliüberschufs röstet, wodurch die Bergarten (Thonerde, Kieselsäure, Silicate) in lösliche Form gebracht werden und in die Chromatlauge übergehen, aus welcher sie in bekannter Weise leicht entfernbar sind. Der Rückstand kann also in den Betrieb zurückkehren, wodurch einerseits die lästige Ansammlung unverwerthbarer Rückstände vermieden bezw. die Zuschlagskosten auf ein Kleinstes herabgemindert, andererseits Verluste an Erz und Chromat in sicherer Weise vermieden werden. Auch wird der im Chromeisenstein in Form von Oxydul vorhandene Eisengehalt verwerthbar, indem der sich ergebende Ueberschufs an Rückstand sehr vortheilhaft, z. B. zur Verhüttung (Bereitung von Chromstahl),The conversion of soda into a far more powerful alkaline agent can now be achieved in a far more advantageous manner through the peculiar behavior of the iron oxide to form alkali metal carbonate. If you heat such, z. B. Soda, with iron oxide, is known to produce sodium ferrite Na 2 O Fe 2 O 3 , a compound of similar alkalinity to sodium oxide and, at the same time, a loose bond. If you roast a mixture of chrome iron stone (ferrochromite), alkali carbonate, e.g. B. Soda and iron oxide, this first reacts with the soda with the formation of sodium ferrite, whereupon this, due to its strong alkalinity, has a splitting effect on the ferrochromite and thereby itself disintegrates, so that sodium chromite is formed with the release of the oxide content of the sodium ferrite, as well as the Iron oxide content of ferrochromite. The sodium chromite and the iron oxide oxidize with the oxygen in the air or. to sodium chromate and iron oxide. The leaching of the roasted mass now leaves a residue, which consists mainly of iron oxide hydrate and iron oxide with the undecomposed ore residue and can easily be obtained in pure form by roasting with a small excess of alkali, whereby the rock species (clay, silica, silicates) are brought into soluble form and pass into the chromate liquor, from which they can be easily removed in a known manner. The residue can therefore return to operation, which on the one hand avoids the annoying accumulation of unusable residues or. the surcharge costs are reduced to a minimum and, on the other hand, losses of ore and chromate are safely avoided. The iron content present in the chrome iron stone in the form of oxide can also be used, since the resulting excess of residue is very beneficial, e.g. B. for smelting (preparation of chrome steel),
als Farbe oder zur Leuchtgasreinigung Verwendung finden kann. Ein weiterer Vortheil des Ersatzes des Kalkes durch Eisenoxyd ergiebt sich auch dadurch, dafs das beim Kalkverfahren so häufig eintretende und zu beträchtlichem Erzverlust führende Zusammenschmelzen und Zusammenballen der Röstmasse vermieden wird.can be used as paint or for illuminating gas cleaning. Another advantage The substitution of iron oxide for the lime also results from the fact that this occurs in the lime process so frequent and significant ore loss leading to meltdown and agglomeration of the roast mass is avoided.
Durch seine dargelegte Wirkungsweise, d. i. die Kaustificirung des Alkalicarbonates, unterscheidet sich die Anwendung von Elisenoxyd beim Aufschliefsen von sauerstoffhaltigen Chromerzen grundsätzlich von der bekannten, z. B. in den englischen Patentschriften Nr. 2175 und 3203, 1864, beschriebenen Verwendung von Manganoxyd. Während im vorliegenden Verfahren das Eisenoxyd als vortheilhafteres Kaustificirungsmittel wirksam ist, soll dort das Manganoxyd als Sauerstoffquelle innerhalb der Röstmasse wirksam werden, um letztere der Röstung in Gestalt von dichten Stücken, welche für die Luft undurchdringlich sein würden, unterziehen zu können. Eine solche Verwendung des Eisenoxydes als Sauerstoffquelle ist hier nicht erreichbar, wie der Versuch der Erhitzung eines Gemisches von Chromeisenstein, Soda und Eisenoxyd mit oder ohne Zusatz von Kalk in einer indifferenten, d. i. sauerstofffreien Atmosphäre, z. B. von Stickstoff beweist, indem alsdann Bildung von Chromat nicht eintritt.Through its explained mode of action, d. i. the causticization of the alkali carbonate, differentiates the use of iron oxide in the digestion of oxygenated Chrome ores basically from the known, z. B. in the English patents No. 2175 and 3203, 1864 of manganese oxide. Whereas in the present case the iron oxide is more advantageous Caustificant is effective, the manganese oxide is said to be the source of oxygen within the roasting mass act to the latter of the roasting in the form of dense To be able to subject pieces that would be impermeable to the air. Such a use of the iron oxide as an oxygen source is not achievable here, as the attempt to heat a mixture of chrome iron stone, soda and iron oxide with or without the addition of lime in an indifferent, d. i. oxygen-free atmosphere, z. B. of nitrogen proves that the formation of chromate then does not occur.
Ebenso wie für sauerstoffhaltige Chromerze eignet sich das Verfahren auch zur Aufschliefsung von sauerstoffhaltigen Manganerzen, wie Braunstein (Pyrolusit, Hausmannit, Psilomelom) u. A., sowie von dergleichen Zinnerzen, wie Zinnstein. As with oxygen-containing chrome ores, the process is also suitable for pulping of oxygen-containing manganese ores such as manganese dioxide (pyrolusite, hausmannite, psilomelom) and others, as well as tin ores such as tin stone.
Claims (1)
Publications (1)
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DE82980C true DE82980C (en) |
Family
ID=355346
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE967193C (en) * | 1953-06-07 | 1957-10-24 | Bayer Ag | Process for the production of alkali chromate which is practically free of alkali aluminate and alkali silicate |
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- DE DENDAT82980D patent/DE82980C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE967193C (en) * | 1953-06-07 | 1957-10-24 | Bayer Ag | Process for the production of alkali chromate which is practically free of alkali aluminate and alkali silicate |
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