DE56713C - Process for detinning tinplate waste by heating it with molten potash or sodium nitrate - Google Patents
Process for detinning tinplate waste by heating it with molten potash or sodium nitrateInfo
- Publication number
- DE56713C DE56713C DENDAT56713D DE56713DA DE56713C DE 56713 C DE56713 C DE 56713C DE NDAT56713 D DENDAT56713 D DE NDAT56713D DE 56713D A DE56713D A DE 56713DA DE 56713 C DE56713 C DE 56713C
- Authority
- DE
- Germany
- Prior art keywords
- detinning
- potash
- heating
- waste
- sodium nitrate
- 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
- 238000000034 method Methods 0.000 title claims description 7
- 239000002699 waste material Substances 0.000 title claims description 7
- VWDWKYIASSYTQR-UHFFFAOYSA-N Sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 title claims description 6
- 229940072033 potash Drugs 0.000 title claims description 3
- 235000015320 potassium carbonate Nutrition 0.000 title claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 title claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 title claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 title claims description 3
- 239000004317 sodium nitrate Substances 0.000 title claims description 3
- 239000005028 tinplate Substances 0.000 title claims description 3
- 238000010438 heat treatment Methods 0.000 title claims 2
- 229910001887 tin oxide Inorganic materials 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N Tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 150000002823 nitrates Chemical class 0.000 claims 1
- 150000002826 nitrites Chemical class 0.000 claims 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N Potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000010814 metallic waste Substances 0.000 description 5
- 235000010333 potassium nitrate Nutrition 0.000 description 5
- QHGNHLZPVBIIPX-UHFFFAOYSA-N tin(II) oxide Inorganic materials [Sn]=O QHGNHLZPVBIIPX-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000155 melt Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 3
- 240000004160 Capsicum annuum Species 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M Sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- 239000004323 potassium nitrate Substances 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229940079864 SODIUM STANNATE Drugs 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 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
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- TVQLLNFANZSCGY-UHFFFAOYSA-N disodium;dioxido(oxo)tin Chemical compound [Na+].[Na+].[O-][Sn]([O-])=O TVQLLNFANZSCGY-UHFFFAOYSA-N 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- LPXPTNMVRIOKMN-UHFFFAOYSA-N sodium;nitrous acid Chemical compound [Na+].ON=O LPXPTNMVRIOKMN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 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
- C22B25/00—Obtaining tin
- C22B25/06—Obtaining tin from scrap, especially tin scrap
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
KLASSE -4O: Hüttenwesen.CLASS -4O: Metallurgy.
Wird metallisches Zinn mit salpetersauren Alkalien geschmolzen, so entsteht je nach der Höhe der Temperatur entweder Zinnoxydul oder Zinnoxyd und salpetrigsaures Alkali, z. B. Na NOa + Sn = SnO + Na NO2 oder 2Na NOa + Sn = SnO2 + 2Na JVO2.If metallic tin is melted with nitric acid alkalis, either tin oxide or tin oxide and nitrous acid alkali is formed, depending on the temperature. B. Na NO a + Sn = SnO + Na NO 2 or 2Na NO a + Sn = SnO 2 + 2Na JVO 2 .
Die letztere Reaction verläuft bei dunkler Rothglühhitze unter secundärer Bildung von Natriumstannat und Austritt von salpetriger Säure 2 Na NO2 + Sn O2 = N2O3 + Na2 Sn O3, weshalb es sich empfiehlt, die Schmelze bei möglichst niedriger Temperatur (ca. 4000 C.) zu leiten.The latter reaction takes place in a dark red glow with secondary formation of sodium stannate and the escape of nitrous acid 2 Na NO 2 + Sn O 2 = N 2 O 3 + Na 2 Sn O 3 , which is why it is advisable to melt the melt at the lowest possible temperature (approx . 400 0 C.) to direct.
Während dieses Verfahren vor dem in der Industrie zur Fabrikation von Natriumnitrit gebräuchlichen (Schmelzen von Salpeter mit Blei) keine besonderen Vortheile bietet, eignet es sich ganz vorzüglich zum Entzinnen der Weifsblechabfälle, da schmelzender Salpeter auf metallisches Eisen ohne Einwirkung ist. Als Beispiel diene folgende Fabrikationsmethode. During this process before that in the industry for the manufacture of sodium nitrite common (smelting of saltpeter with lead) offers no particular advantages it is very suitable for detinning the white sheet metal waste, since it is melting saltpeter is without influence on metallic iron. The following manufacturing method is used as an example.
Man erhitzt in einem halbkugelförmigen, mit einem Ablaufstutzen versehenen Kessel von ca. 800 1 Inhalt 500 kg Chilisalpeter zum Schmelzen und taucht, sobald die Masse vollständig dünnflüssig geworden ist, einen aus Flacheisen genieteten Korb, dessen Form sich der des Kessels anpafst und in dem sich die Weifsblechabfälle befinden, in die Schmelze ein. Dieser Korb wird durch eine geeignete Vorrichtung, z. B. Kurbel, Krummzapfen oder Excenter, beständig auf- und abbewegt. Sobald das Zinn vollständig oxydirt ist, zieht man den Korb mit einem Flaschenzuge auf und schüttet den Inhalt in einen liegenden eisernen Kessel von 9 cbm Inhalt, in dem sich 1000 1 Wasser befinden. Man bringt nun eine neue Portion Weifsblechabfälle in den Kessel und wiederholt die Operation, bis der Salpeter völlig in Nitrit übergegangen ist. Alsdann wird der Inhalt des Kessels ebenfalls in den Cylinder entleert, das Wasser durch eingeleiteten Dampf ins Sieden gebracht, die Trommel mit einem Mannlochdeckel verschlossen und nun in langsam rotirende Bewegung versetzt (ca. io Touren die Minute). Hierbei löst sich das Gemisch der Zinnoxyde vollständig vom Eisen. Die Lösung des salpetrigsauren Natrons wird von den Zinnoxyden abfiltrirt und zur Krystallisation eingedampft. Die Abfälle werden alsdann nochmals mit Wasser durchgerührt, die hierbei erhaltene sehr leichte Lauge dient zum Aufschliefsen neuer Schmelzen.It is heated in a hemispherical kettle provided with a discharge nozzle from approx. 800 1 content 500 kg chilli nitrate to melt and immerse as soon as the mass is complete has become thin, a basket riveted from flat iron, the shape of which that of the boiler and in which the white sheet metal waste is located, into the melt a. This basket is secured by a suitable device, e.g. B. crank, crooked pin or Eccentric, constantly moving up and down. As soon as the tin is completely oxidized, one pulls the Open the basket with a pulley system and pour the contents into a lying iron kettle of 9 cbm content, which contains 1000 liters of water. You now bring a new portion Waste tinplate in the boiler and repeat the operation until the saltpeter is completely converted into nitrite has passed. Then the contents of the kettle are also emptied into the cylinder, the water is brought to the boil by steam introduced, the drum with a manhole cover closed and now set in a slowly rotating movement (approx. 10 tours the Minute). The mixture of tin oxides dissolves completely from the iron. The solution the sodium nitrous acid is filtered off from the tin oxides and evaporated to crystallize. The waste is then stirred through again with water, the very light alkali obtained in this way is used for digestion new melting.
Das Gemisch der Zinnoxyde wird in einem Schachtofen mit Kohle zu metallischem Zinn reducirt.The mixture of tin oxides is converted into metallic tin in a shaft furnace with coal reduced.
Das folgende Verfahren ist besonders dort empfehlenswerth, wo es sich um die Entzinnung fest auf einander liegender Abfälle handelt, welche beim Entzinnen im Korbe nicht genügend mit dem Salpeter in Berührung kommen. Ein in einer Feuerung liegender, um eine horizontale Achse drehbarer gufseiserner Cylinder von 5000 1 Inhalt wird mit Weifsblechabfäilen bis zur Hälfte gefüllt und auf je 100 kg derselben 20 kg Chilisalpeter hinzugegeben. Nunmehr wird stark- angefeuertThe following procedure is particularly recommended where detinning is concerned deals with waste lying firmly on top of one another, which does not come into sufficient contact with the saltpetre when detinning in the basket come. A cast iron one lying in a furnace, rotatable about a horizontal axis Cylinder of 5000 1 content is filled up to half with white sheet metal waste and for every 100 kg of the same 20 kg of chilli nitrate are added. Now there is strong encouragement
und die Füllung auf die Weise gerührt, dafs der mit Zahnradantrieb versehene Kessel gedreht wird, während ein an der horizontalen Welle befestigtes Rührwerk sich in entgegengesetzter Richtung bewegt. Sobald das Zinn vollständig oxydirt ist, bringt man auf ioo kg Salpeter 200 1 Wasser in den Kessel, rührt gut um und verarbeitet die Schmelze, wie oben beschrieben. Die etwa 50 pCt. Nitrit und 50 pCt. Salpeter enthaltende Lösung wird zur Trockne eingedampft. Das hier erhaltene Salzgemenge dient zum Entzinnen neuer Weifsblechabfälle. and stirring the filling in such a way that the gear-driven kettle rotates while an agitator attached to the horizontal shaft moves in the opposite direction. Once the tin is completely oxidized, add 200 liters of water to 100 kg of saltpetre in the kettle and stir well around and processes the melt as described above. The approximately 50 pCt. nitrite and 50 pCt. Solution containing nitre is evaporated to dryness. The one received here Salt mix is used to detinning new white sheet metal waste.
Am vortheilhaftesten arbeitet man auf die Weise, dafs man die beiden Verfahren verbindet und zunächst fest auf einander liegende Abfälle in dem rotirenden Cylinder entzinnt, die erhaltene Lauge in dem gufseisernen Schmelzkessel eindampft und hier mit lockeren, in dem Korb befindlichen Weifsblechabfällen völlig in Nitrit überführt.It is most advantageous to work in such a way as to combine the two processes and first decinated waste lying on top of one another in the rotating cylinder, the lye obtained evaporates in the cast iron melting kettle and here with loose, White sheet metal waste in the basket is completely converted into nitrite.
Die grofsen Vortheile, welche dieses Verfahren vor den übrigen in Anwendung befindlichen, wie Auflösen des Zinns mit Salzsäure u. s. w., bietet, bestehen darin, dafs die Chemikalien bei diesem Procefs nicht einfach verbraucht, sondern in werthvollere Producte übergeführt werden, dafs das Eisen nicht angegriffen wird und dafs selbst völlig verrostete Abfälle ein eisenfreies Product ergeben.The great advantages which this method uses over the others, such as dissolving tin with hydrochloric acid, etc., consist in the fact that the Chemicals in this process are not simply used up, but in more valuable products be convicted that the iron is not attacked and that it rusted itself completely Waste results in an iron-free product.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE56713C true DE56713C (en) | 1900-01-01 |
Family
ID=331135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT56713D Expired DE56713C (en) | Process for detinning tinplate waste by heating it with molten potash or sodium nitrate |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE56713C (en) |
-
0
- DE DENDAT56713D patent/DE56713C/en not_active Expired
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