EP0633324A1 - Process and device for the removal of tin, arsenic and antimony from molten lead - Google Patents
Process and device for the removal of tin, arsenic and antimony from molten lead Download PDFInfo
- Publication number
- EP0633324A1 EP0633324A1 EP94109143A EP94109143A EP0633324A1 EP 0633324 A1 EP0633324 A1 EP 0633324A1 EP 94109143 A EP94109143 A EP 94109143A EP 94109143 A EP94109143 A EP 94109143A EP 0633324 A1 EP0633324 A1 EP 0633324A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lead
- gas
- oxygen
- protective gas
- gas nozzle
- 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.)
- Withdrawn
Links
Images
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
- C22B13/00—Obtaining lead
- C22B13/06—Refining
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
Definitions
- the invention relates to a method and an apparatus for removing tin, arsenic and antimony from molten lead by means of gas mixtures containing oxygen or oxygen, which are blown into the lead melt with at least one gas nozzle.
- the Harris process uses caustic soda and saltpetre as the oxidant.
- the lead melt to be refined is pumped into an intermediate container with a pump, the separated oxides in a salt slag attack.
- the slag must then be processed further in a complex manner.
- a refining process described in DE 33 27 796 C1 works with oxygen-enriched air in the melting tank. In the described process, the refining speed is limited by the lead temperature of 650 ° C in the boiler. Caustic soda is added in small quantities for slag formation.
- the object of the application is to improve the process for removing tin, arsenic and antimony in such a way that high oxidation rates can be achieved with an oxygen entry system without wear on the gas nozzles.
- the oxidation of the metals tin, arsenic and antimony can be accelerated and the equilibrium between impurities in the lead melt and in the smear can be quickly adjusted without damaging the gas nozzle because of the escaping oxygen or the oxygen-containing gas mixture is enveloped with a protective gas at least in the outlet area.
- the formation of a lead-free cavity in front of the gas nozzle thus shifts the reaction site from the gas nozzle into the bath of the lead melt.
- the contact between molten lead and gas nozzle is avoided by the simultaneous formation of a protective gas cushion surrounding at least the outlet area.
- the gas nozzle is cooled from the outside by the inert protective gas.
- the oxidation is additionally improved by the inert gas blown into the lead melt at high speed, preferably the speed of sound, because this increases the turbulent mixing of lead melt and oxygen.
- a turbulent mixing of the oxygen and the lead melt can also be set via the oxygen emerging from the gas nozzle and the lead flow conveyed into a reaction vessel, in which case the cooling shielding gas envelops the gas nozzle in the form of a circuit cooling.
- the shielding gas nozzle does not have an outflow opening, but rather an inflow and outflow line via which the shielding gas, if appropriate with the interposition of a heat exchanger, circulates cooled in the gas nozzle. Cooling the gas nozzle with a liquid, such as water, is also conceivable.
- the protective gas which is preferably nitrogen, carbon dioxide or argon, is expediently enveloped in the gas nozzle from above the level of the lead melt to the oxygen outlet area.
- the oxides formed by the oxidation with oxygen segregate with the lead melt and float on the surface of the lead bath in a separate reaction vessel, from where they are removed by regulating the level of the lead level.
- the drawing illustrates an embodiment of the invention, namely the lead refining by means of injected oxygen.
- a gas nozzle 1 a is shown, which consists of an oxygen tube 2, from which a jet 14 of gaseous oxygen or oxygen-containing gas mixture emerges at high speed and flows into the lead melt 6.
- the supply of oxygen (O2) takes place through the supply line 10.
- the tube 2 is surrounded by an outer tube 3 concentrically.
- a protective gas flows through the supply line 11 through the annular gap 12 formed between the tube 2 and the outer tube 3 to the outlet area 13 of the oxygen jet 14.
- the inert gas nitrogen (N2) or carbon dioxide (CO2) or argon is preferred as the protective gas (Ar) used because these gases can be made available inexpensively and do not react with the lead melt.
- the protective gas is preferably also used as a mixed gas towards the end of the oxidation, i.e. Nitrogen is added to the oxygen.
- the oxygen flow rate is adapted to the antimony supply when the antimony content is only a few hundred ppm in order to prevent excessive oxidation of lead.
- the amount of antimony in the reaction vessel 4 is determined by the residual content in the melt and the pump line.
- the oxygen flow is therefore reduced to such an extent that nitrogen is added to the oxygen to maintain the nozzle admission pressure of the gas nozzle 1a.
- the protective gas cooling the gas nozzle 1a flows from above the level of the lead melt to the oxygen outlet area 13, exits here from the nozzle opening 15 and flows into the lead melt 6 to form a cavity which, in conjunction with the cavity, prevents contact between the high-temperature oxidizing lead melt and tubes 2 and 3.
- the tube 2 for the oxygen and the outer tube 3 for the protective gas run in a straight line.
- the protective gas nozzle 2, 3 can also be designed in the form of a hook gas nozzle, which is directed in its outflow area to the surface of the lead melt (FIG. 2) or can be installed directly in the melting tank 16 or directly in the bottom of a reaction vessel 4.
- the removal of tin, arsenic and antimony from the lead melt 6 takes place in a separate reaction vessel 4, in which the reaction products (smears) 5 collect on the surface of the lead melt 6.
- the lower part of the reaction vessel 4 is immersed in the lead melt 6 of the melting vessel 16.
- the lead is conveyed from the melting vessel into the reaction vessel 4 from above with a lead pump 7 and comes into contact with the injected oxygen jet 14 in a turbulent mixing.
- the same amount of lead, which is pumped in from above, returns to the bottom of the reaction vessel 4 via a closable opening 17 into the melting vessel 16. This results in the necessary intimate contact of the constantly circulating lead melt with the oxygen and a rapid reaction until the tin, arsenic and antimony are completely removed.
- refining is also interrupted to remove the oxides.
- the opening 17 of the reaction vessel 4 is closed by a closing mechanism 18.
- the protective gas nozzle 2, 3 is pulled out and the level of the lead melt in the reaction vessel 4 is increased by conveying 7 lead from the melting vessel into the reaction vessel 4 while the lead pump is running. The oxides can then be drawn off via a groove 8.
- Melting vessel 16 and reaction vessel 4 are covered with suction hoods 9 and connected to a dedusting device.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Entfernen von Zinn, Arsen und Antimon aus schmelzflüssigem Blei mittels Sauerstoff oder Sauerstoff enthaltenden Gasgemischen, der bzw. die mit mindestens einer Gasdüse in die Bleischmelze eingeblasen werden.The invention relates to a method and an apparatus for removing tin, arsenic and antimony from molten lead by means of gas mixtures containing oxygen or oxygen, which are blown into the lead melt with at least one gas nozzle.
Für die Raffination von Bleischmelzen zur Entfernung von Zinn, Arsen und Antimon sind bereits verschiedene Verfahren bekannt.Various processes are already known for refining lead melts to remove tin, arsenic and antimony.
Das Harris-Verfahren arbeitet mit Ätznatron und Salpeter als Oxidationsmittel. Mit einer Pumpe wird die zu raffinierende Bleischmelze in einen Zwischenbehälter umgepumpt, wobei die abgeschiedenen Oxide in einer Salzschlacke anfallen. Die Schlacke muß anschließend aufwendig weiterverarbeitet werden.The Harris process uses caustic soda and saltpetre as the oxidant. The lead melt to be refined is pumped into an intermediate container with a pump, the separated oxides in a salt slag attack. The slag must then be processed further in a complex manner.
Bei dem Flammofen-Verfahren wird mit eingeblasener Luft oxidiert. Die dabei entstehenden hohen Abstrichmengen mit niedrigen Antimongehalten müssen kostspielig aufgearbeitet werden.In the flame furnace process, the air is oxidized with blown air. The resulting high smear quantities with low antimony contents have to be worked up costly.
Ein in DE 33 27 796 C1 beschriebenes Raffinationsverfahren arbeitet mit Sauerstoff angereicherter Luft im Schmelzkessel. Die Raffinationsgeschwindigkeit wird bei dem beschriebenen Verfahren durch die Bleitemperatur von 650°C im Kessel begrenzt. Für die Schlackenbildung wird Ätznatron in kleinen Mengen zugegeben.A refining process described in DE 33 27 796 C1 works with oxygen-enriched air in the melting tank. In the described process, the refining speed is limited by the lead temperature of 650 ° C in the boiler. Caustic soda is added in small quantities for slag formation.
Höhere Arbeitstemperaturen und ein Verzicht auf Ätznatron sind nach einem Raffinationsverfahren gemäß DE 38 31 898 C1 möglich. Bei dem beschriebenen Verfahren wird Sauerstoff in einem auf ein anteiliges Volumen, bezogen auf den Schmelzkessel, eingeengten turbulenten Strom flüssigen Bleies eingeleitet. Das mit Sauerstoff innig vermischte Blei tritt zur Beruhigung in ein größeres Volumen ein, in welchem die Oxide aufschwimmen und abgestrichen werden. Der turbulente Bleistrom wird durch eine Bleipumpe erzeugt, die das Blei in ein Reaktionsrohr fördert. Das Reaktionsrohr ist in einem zweiten Zylinder größeren Volumens angeordnet, aus dem die Oxide abgezogen werden. Das Blei fließt durch eine am Boden befindliche Auslaßöffnung ab.Higher working temperatures and dispensing with caustic soda are possible using a refining process according to DE 38 31 898 C1. In the process described, oxygen is introduced in a turbulent stream of liquid lead which is restricted to a proportionate volume, based on the melting tank. The lead, intimately mixed with oxygen, enters a larger volume to calm it down, in which the oxides float and are wiped off. The turbulent flow of lead is generated by a lead pump that conveys the lead into a reaction tube. The reaction tube is arranged in a second cylinder of larger volume, from which the oxides are drawn off. The lead flows out through an outlet opening on the bottom.
Der Anmeldung liegt die Aufgabe zugrunde, das Verfahren zum Entfernen von Zinn, Arsen und Antimon so zu verbessern, daß hohe Oxidationsgeschwindigkeiten mit einem Sauerstoff-Eintragsystem erreicht werden, ohne daß ein Verschleiß an den Gasdüsen auftritt.The object of the application is to improve the process for removing tin, arsenic and antimony in such a way that high oxidation rates can be achieved with an oxygen entry system without wear on the gas nozzles.
Ausgehend von dem im Oberbegriff des Anspruches 1 berücksichtigten Stand der Technik ist diese Aufgabe erfindungsgemäß gelöst, mit den im kennzeichnenden Teil des Anspruches 1 angegebenen Merkmalen.Starting from the prior art taken into account in the preamble of claim 1, this object is achieved according to the invention with the features specified in the characterizing part of claim 1.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.
Durch das erfindungsgemäße Einblasen des Sauerstoffs oder eines Sauerstoff enthaltenden Gasgemisches durch eine oder mehrere Schutzgasdüsen läßt sich die Oxidation der Metalle Zinn, Arsen und Antimon beschleunigen und eine schnelle Einstellung des Gleichgewichtes zwischen Verunreinigungen in der Bleischmelze und im Abstrich ohne Beschädigung der Gasdüse herstellen, weil der austretende Sauerstoff bzw. das Sauerstoff enthaltende Gasgemisch mit einem Schutzgas mindestens im Austrittsbereich umhüllt wird. Es wird somit durch die Ausbildung eines bleifreien Hohlraumes vor der Gasdüse der Reaktionsort von der Gasdüse in das Bad der Bleischmelze verlagert. Der Kontakt zwischen schmelzflüssigem Blei und Gasdüse wird durch die gleichzeitige Ausbildung eines mindestens den Austrittsbereich umgebenden Schutzgaspolsters vermieden. Hinzu kommt, daß die Gasdüse von außen durch das inerte Schutzgas gekühlt wird. Zusätzlich verbessert wird die Oxidation durch das mit hoher Geschwindigkeit, vorzugsweise Schallgeschwindigkeit, in die Bleischmelze eingeblasene inerte Gas, weil hierdurch die turbulente Durchmischung von Bleischmelze und Sauerstoff erhöht wird.By blowing in the oxygen or an oxygen-containing gas mixture according to the invention through one or more protective gas nozzles, the oxidation of the metals tin, arsenic and antimony can be accelerated and the equilibrium between impurities in the lead melt and in the smear can be quickly adjusted without damaging the gas nozzle because of the escaping oxygen or the oxygen-containing gas mixture is enveloped with a protective gas at least in the outlet area. The formation of a lead-free cavity in front of the gas nozzle thus shifts the reaction site from the gas nozzle into the bath of the lead melt. The contact between molten lead and gas nozzle is avoided by the simultaneous formation of a protective gas cushion surrounding at least the outlet area. In addition, the gas nozzle is cooled from the outside by the inert protective gas. The oxidation is additionally improved by the inert gas blown into the lead melt at high speed, preferably the speed of sound, because this increases the turbulent mixing of lead melt and oxygen.
Eine turbulente Durchmischung des Sauerstoffs und der Bleischmelze kann auch über den aus der Gasdüse austretenden Sauerstoff und den in ein Reaktionsgefäß geförderten Bleistrom eingestellt werden, wobei dann das kühlende Schutzgas die Gasdüse in Form einer Kreislaufkühlung umhüllt. Dabei weist die Schutzgasdüse keine Ausströmöffnung auf, sondern eine Zu- und Abströmleitung, über die das Schutzgas gegebenenfalls unter Zwischenschaltung eines Wärmetauschers gekühlt in der Gasdüse zirkuliert. Auch eine Kühlung der Gasdüse mit einer Flüssigkeit, wie Wasser, ist denkbar.A turbulent mixing of the oxygen and the lead melt can also be set via the oxygen emerging from the gas nozzle and the lead flow conveyed into a reaction vessel, in which case the cooling shielding gas envelops the gas nozzle in the form of a circuit cooling. The shielding gas nozzle does not have an outflow opening, but rather an inflow and outflow line via which the shielding gas, if appropriate with the interposition of a heat exchanger, circulates cooled in the gas nozzle. Cooling the gas nozzle with a liquid, such as water, is also conceivable.
Zweckmäßigerweise wird die Gasdüse von oberhalb des Niveaus der Bleischmelze bis zum Sauerstoff-Austrittsbereich von dem Schutzgas umhüllt, welches bevorzugt Stickstoff, Kohlendioxid oder Argon ist.The protective gas, which is preferably nitrogen, carbon dioxide or argon, is expediently enveloped in the gas nozzle from above the level of the lead melt to the oxygen outlet area.
Die durch die Oxidation mit Sauerstoff gebildeten Oxide entmischen sich mit der Bleischmelze und schwimmen auf der Oberfläche des Bleibades in einem separaten Reaktionsgefäß, von wo aus sie durch Niveau-Regulierung des Bleispiegels abgezogen werden.The oxides formed by the oxidation with oxygen segregate with the lead melt and float on the surface of the lead bath in a separate reaction vessel, from where they are removed by regulating the level of the lead level.
Die Zeichnung veranschaulicht ein Ausführungsbeispiel der Erfindung, nämlich die Bleiraffination mittels eingeblasenem Sauerstoff.The drawing illustrates an embodiment of the invention, namely the lead refining by means of injected oxygen.
Dargestellt ist eine Gasdüse 1a, die aus einem Sauerstoffrohr 2 besteht, aus welchem ein Strahl 14 gasförmigen Sauerstoffs oder sauerstoffenthaltenden Gasgemisches mit hoher Geschwindigkeit austritt und in die Bleischmelze 6 einströmt. Die Zufuhr des Sauerstoffs (O₂) erfolgt durch die Versorgungsleitung 10. Das Rohr 2 ist von einem Außenrohr 3 konzentrisch umgeben. Über die Versorgungsleitung 11 strömt ein Schutzgas durch den zwischen Rohr 2 und Außenrohr 3 gebildeten Ringspalt 12 bis zum Austrittsbereich 13 des Sauerstoffstrahles 14. Als Schutzgas wird bevorzugt das inerte Gas Stickstoff (N₂) oder Kohlendioxid (CO₂) oder Argon (Ar) eingesetzt, weil diese Gase kostengünstig zur Verfügung gestellt werden können und nicht mit der Bleischmelze reagieren.A
Vorzugsweise wird das Schutzgas gegen Ende der Oxidation auch als Mischgas eingesetzt, d.h. Stickstoff wird dem Sauerstoff zugemischt. Hierdurch wird der Sauerstoffdurchfluß dem Antimonangebot angepaßt, wenn der Gehalt an Antimon nur noch einige Hundert ppm beträgt, um eine zu starke Oxidation von Blei zu verhindern. Das Antimonangebot im Reaktionsgefäß 4 wird durch den Restgehalt in der Schmelze und der Pumpenleitung bestimmt.The protective gas is preferably also used as a mixed gas towards the end of the oxidation, i.e. Nitrogen is added to the oxygen. As a result, the oxygen flow rate is adapted to the antimony supply when the antimony content is only a few hundred ppm in order to prevent excessive oxidation of lead. The amount of antimony in the reaction vessel 4 is determined by the residual content in the melt and the pump line.
Der Sauerstoffdurchfluß wird deshalb gegen Ende des Prozesses so weit abgesenkt, daß zur Aufrechterhaltung des Düsenvordruckes der Gasdüse 1a dem Sauerstoff Stickstoff zugemischt wird.Towards the end of the process, the oxygen flow is therefore reduced to such an extent that nitrogen is added to the oxygen to maintain the nozzle admission pressure of the
Das die Gasdüse 1a kühlende Schutzgas strömt von oberhalb des Niveaus der Bleischmelze bis zum Sauerstoff-Austrittsbereich 13, tritt hier aus der Düsenöffnung 15 aus und strömt unter Bildung eines Hohlraumes in die Bleischmelze 6. Dabei entsteht an der Stirnseite der Schutzgasdüse 2, 3 ein Gaspolster, welches in Verbindung mit dem Hohlraum den Kontakt zwischen der mit hoher Temperatur oxidierenden Bleischmelze und den Rohren 2 und 3 verhindert. In dem dargestellten Ausführungsbeispiel verlaufen das Rohr 2 für den Sauerstoff und das Außenrohr 3 für das Schutzgas gradlinig. Die Schutzgasdüse 2, 3 kann auch in Form einer Hakengasdüse ausgeführt sein, die in ihrem Ausströmbereich zur Oberfläche der Bleischmelze gerichtet ist (Figur 2) oder direkt in dem Schmelzkessel 16 oder direkt in den Boden eines Reaktionsgefäßes 4 eingebaut sein.The protective gas cooling the
Die Entfernung von Zinn, Arsen und Antimon aus der Bleischmelze 6 findet in einem separaten Reaktionsgefäß 4 statt, in dem sich die Reaktionsprodukte (Abstriche) 5 an der Oberfläche der Bleischmelze 6 sammeln. Das Reaktionsgefäß 4 ist mit seinem Unterteil in der Bleischmelze 6 des Schmelzkessels 16 eingetaucht. Mit einer Bleipumpe 7 wird das Blei aus dem Schmelzkessel von oben in das Reaktionsgefäß 4 gefördert und kommt in turbulenter Durchmischung mit dem eingeblasenen Sauerstoffstrahl 14 in Berührung. Die gleiche Menge Blei, die von oben eingepumpt wird, tritt am Boden des Reaktionsgefäßes 4 über eine verschließbare Öffnung 17 in den Schmelzkessel 16 zurück. Dadurch findet die erforderliche innige Berührung der ständig umlaufenden Bleischmelze mit dem Sauerstoff und eine rasche Reaktion bis zur völligen Entfernung von Zinn, Arsen und Antimon statt.The removal of tin, arsenic and antimony from the lead melt 6 takes place in a separate reaction vessel 4, in which the reaction products (smears) 5 collect on the surface of the lead melt 6. The lower part of the reaction vessel 4 is immersed in the lead melt 6 of the
Aufgrund großer Oxidmengen und zur Aufrechterhaltung einer ausreichenden Bleimenge über der Düse wird die Raffination auch zum Abziehen der Oxide unterbrochen. Dabei wird die Öffnung 17 des Reaktionsgefäßes 4 über einen Schließmechanismus 18 verschlossen. Zum Abziehen der Raffinationsprodukte Zinn, Arsen und Antimon wird die Schutzgasdüse 2, 3 herausgezogen und das Niveau der Bleischmelze im Reaktionsgefäß 4 erhöht, indem bei laufender Bleipumpe 7 Blei aus dem Schmelzkessel in das Reaktionsgefäß 4 gefördert wird. Die Oxide können dann über eine Rinne 8 abgezogen werden.Because of the large amounts of oxide and to maintain a sufficient amount of lead above the nozzle, refining is also interrupted to remove the oxides. The opening 17 of the reaction vessel 4 is closed by a
Schmelzkessel 16 und Reaktionsgefäß 4 sind mit Absaughauben 9 abgedeckt und mit einer Entstaubungseinrichtung verbunden.
Claims (10)
dadurch gekennzeichnet, daß
mindestens der in der Bleischmelze (6) angeordnete Sauerstoff-Austrittsbereich (13) der Gasdüse von einem Schutzgas umhüllt wird.Process for removing tin, arsenic and antimony from molten lead by means of gas mixtures containing oxygen or oxygen, which are blown into the lead melt with at least one gas nozzle,
characterized in that
at least the oxygen outlet area (13) of the gas nozzle arranged in the lead melt (6) is enveloped by a protective gas.
dadurch gekennzeichnet, daß
die Gasdüse (1a, 1b) von oberhalb des Niveaus der Bleischmelze (6) bis zum Sauerstoff-Austrittsbereich (13) von dem Schutzgas umhüllt wird.Method according to claim 1,
characterized in that
the gas nozzle (1a, 1b) is enveloped by the protective gas from above the level of the lead melt (6) to the oxygen outlet area (13).
dadurch gekennzeichnet, daß
das Schutzgas aus einer Düsenöffnung (15) austritt und in die Bleischmelze (6) strömt.The method of claim 1 or 2,
characterized in that
the protective gas emerges from a nozzle opening (15) and flows into the lead melt (6).
dadurch gekennzeichnet, daß
das Schutzgas ein inertes Kühlgas ist.Method according to one of claims 1 to 3,
characterized in that
the protective gas is an inert cooling gas.
dadurch gekennzeichnet, daß
das Schutzgas Stickstoff (N₂), Kohlendioxid (CO₂) oder Argon (Ar) ist.Method according to one of claims 1 to 4,
characterized in that
the protective gas is nitrogen (N₂), carbon dioxide (CO₂) or argon (Ar).
dadurch gekennzeichnet, daß
das Schutzgas mit Schallgeschwindigkeit in die Bleischmelze (6) strömt.Method according to one of claims 1 to 5,
characterized in that
the protective gas at the speed of sound into the Lead melt (6) flows.
dadurch gekennzeichnet, daß
das Entfernen von Zinn, Arsen und Antimon in einem separaten Reaktionsgefäß (4) stattfindet, aus dem die auf der Oberfläche der Bleischmelze schwimmenden Reaktionsprodukte durch Niveau-Regulierung des Bleispiegels abgezogen werden.Method according to one of claims 1 to 6,
characterized in that
the removal of tin, arsenic and antimony takes place in a separate reaction vessel (4), from which the reaction products floating on the surface of the lead melt are drawn off by regulating the level of the lead level.
dadurch gekennzeichnet, daß
die Gasdüse (1a) von einer Schutzgasdüse (3) umgeben ist.Device for carrying out the method according to one of claims 1 to 7 with a supply line for oxygen or a gas mixture containing oxygen and a gas nozzle connected to the supply line,
characterized in that
the gas nozzle (1a) is surrounded by a protective gas nozzle (3).
dadurch gekennzeichnet, daß
die Gasdüse aus einem Rohr (2) besteht das von einem Außenrohr (3) unter Bildung eines Kanales (19) umgeben ist und der Kanal an eine Versorgungsleitung (11) für Schutzgas angeschlossen ist.Device according to claim 8,
characterized in that
the gas nozzle consists of a tube (2) which is surrounded by an outer tube (3) to form a channel (19) and the channel is connected to a supply line (11) for protective gas.
dadurch gekennzeichnet, daß
die Rohre (2, 3) konzentrisch angeordnet sind.Device according to claim 8 or 9,
characterized in that
the tubes (2, 3) are arranged concentrically.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4322782 | 1993-07-08 | ||
| DE4322782A DE4322782A1 (en) | 1993-07-08 | 1993-07-08 | Process for removing tin, arsenic and antimony from molten lead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0633324A1 true EP0633324A1 (en) | 1995-01-11 |
Family
ID=6492281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94109143A Withdrawn EP0633324A1 (en) | 1993-07-08 | 1994-06-15 | Process and device for the removal of tin, arsenic and antimony from molten lead |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5451247A (en) |
| EP (1) | EP0633324A1 (en) |
| CA (1) | CA2127674A1 (en) |
| DE (1) | DE4322782A1 (en) |
| MX (1) | MX9404677A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021049A1 (en) * | 1995-01-07 | 1996-07-11 | Metallgesellschaft Aktiengesellschaft | Process and device for separating a specifically lighter phase from a specifically heavier liquid phase |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3592486B2 (en) | 1997-06-18 | 2004-11-24 | 株式会社東芝 | Soldering equipment |
| US8211207B2 (en) | 2006-12-05 | 2012-07-03 | Stannum Group LLC | Process for refining lead bullion |
| US20100132508A1 (en) * | 2006-12-05 | 2010-06-03 | Miguel Pizzuto | Process for separating and refining impurities from lead bullion |
| DE102006059589A1 (en) * | 2006-12-16 | 2008-06-19 | Messer Austria Gmbh | Apparatus and method for treating lead lead |
| US8105416B1 (en) | 2010-05-05 | 2012-01-31 | Stannum Group LLC | Method for reclaiming lead |
| DE102015116615B4 (en) | 2015-09-30 | 2023-12-07 | Jl Goslar Gmbh | Method for cleaning a lead melt |
| ES2947189T3 (en) * | 2019-01-30 | 2023-08-02 | Aurubis Beerse | Improved method for producing high purity lead |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2515163A1 (en) * | 1980-11-18 | 1983-04-29 | Sofrem | Removal of calcium and aluminium from molten silicon alloy - by injecting oxygen into lower part of ladle, with protective fluid injected simultaneously (NO 14.6.82) |
| DE3332796C1 (en) * | 1983-07-25 | 1984-06-28 | Josef Dr.-Ing. 8000 München Blanderer | Process for refining antimony-containing lead melts with supply of oxygen-enriched air |
| US4734129A (en) * | 1985-06-10 | 1988-03-29 | Britannia Refined Metals Limited | Recovery of metals from their alloys with lead using consummable lance and apparatus |
| DE3831898A1 (en) * | 1988-09-20 | 1990-03-29 | Preussag Boliden Blei Gmbh | METHOD AND DEVICE FOR REMOVING ARSEN, TIN AND ANTIMONE FROM WORK LEAD WITH OXYGEN |
| DE4014835A1 (en) * | 1989-05-12 | 1990-11-15 | Air Liquide | Oxidn. treatment of liq. metal baths to remove impurities - using oxidising flush gas contg. carbon di:oxide to control produced heat |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2946030C2 (en) * | 1979-11-14 | 1982-11-25 | Korf Industrie Und Handel Gmbh + Co Kg, 7570 Baden-Baden | Method for protecting the nozzles and the refractory lining of a vessel for refining a molten metal |
| FR2645456B1 (en) * | 1989-04-11 | 1994-02-11 | Air Liquide | METHOD AND PLANT FOR TREATING A LIQUID WITH A GAS |
| US5053076A (en) * | 1990-03-16 | 1991-10-01 | Metaleurop Weser Blei Gmbh | Process and device for removal of arsenic, tin & artimony from crude lead containing silver |
-
1993
- 1993-07-08 DE DE4322782A patent/DE4322782A1/en not_active Ceased
-
1994
- 1994-06-15 EP EP94109143A patent/EP0633324A1/en not_active Withdrawn
- 1994-06-21 MX MX9404677A patent/MX9404677A/en unknown
- 1994-07-06 US US08/271,013 patent/US5451247A/en not_active Expired - Fee Related
- 1994-07-08 CA CA002127674A patent/CA2127674A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2515163A1 (en) * | 1980-11-18 | 1983-04-29 | Sofrem | Removal of calcium and aluminium from molten silicon alloy - by injecting oxygen into lower part of ladle, with protective fluid injected simultaneously (NO 14.6.82) |
| DE3332796C1 (en) * | 1983-07-25 | 1984-06-28 | Josef Dr.-Ing. 8000 München Blanderer | Process for refining antimony-containing lead melts with supply of oxygen-enriched air |
| US4734129A (en) * | 1985-06-10 | 1988-03-29 | Britannia Refined Metals Limited | Recovery of metals from their alloys with lead using consummable lance and apparatus |
| DE3831898A1 (en) * | 1988-09-20 | 1990-03-29 | Preussag Boliden Blei Gmbh | METHOD AND DEVICE FOR REMOVING ARSEN, TIN AND ANTIMONE FROM WORK LEAD WITH OXYGEN |
| DE3831898C2 (en) * | 1988-09-20 | 1991-07-18 | Metaleurop Weser Blei Gmbh, 2890 Nordenham, De | |
| DE4014835A1 (en) * | 1989-05-12 | 1990-11-15 | Air Liquide | Oxidn. treatment of liq. metal baths to remove impurities - using oxidising flush gas contg. carbon di:oxide to control produced heat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021049A1 (en) * | 1995-01-07 | 1996-07-11 | Metallgesellschaft Aktiengesellschaft | Process and device for separating a specifically lighter phase from a specifically heavier liquid phase |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4322782A1 (en) | 1995-01-12 |
| MX9404677A (en) | 1995-01-31 |
| US5451247A (en) | 1995-09-19 |
| CA2127674A1 (en) | 1995-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60031206T2 (en) | Method for starting a direct melting process | |
| DE3246470C1 (en) | Continuous casting process for metals | |
| EP0633324A1 (en) | Process and device for the removal of tin, arsenic and antimony from molten lead | |
| DE2521830C2 (en) | Process for refining heavily contaminated black copper | |
| EP0053848B1 (en) | Process for injecting gases rich in oxygen into a molten non-ferrous metal bath | |
| DE2042811A1 (en) | Melting process for decarburizing steel | |
| DE3586277T2 (en) | METHOD AND DEVICE FOR CONTROLLED REFINING OF MELTS. | |
| DE2306398C2 (en) | Process for the treatment of molten non-ferrous metals, especially copper, by blowing reaction gases | |
| DE2722627A1 (en) | METHOD AND DEVICE FOR MANUFACTURING FLOAT GLASS | |
| DE1596617A1 (en) | Method and device for the production of flat glass | |
| EP1349815B1 (en) | Device and method for melting glass | |
| DE1906985B2 (en) | Method and device for producing float glass | |
| EP2106454B1 (en) | Apparatus and process for the treatment of crude lead | |
| DE10142405B4 (en) | Device, its use and method for introducing aggressive gases into a molten glass | |
| DE2747586C2 (en) | Process and device for the continuous extraction of low-iron raw tin from iron-rich tin ore concentrates | |
| DE2645585A1 (en) | METHOD FOR RELEASING VALUE METAL CONTENT FROM SLAG BY INFLATING | |
| EP0425620B1 (en) | Process and device for smelting metals in cupola furnaces run without coke | |
| DE2030426A1 (en) | ||
| DE3831898C2 (en) | ||
| DE2029449C3 (en) | Desulphurisation channel for pig iron | |
| DE2502674A1 (en) | SHIELD GAS SYSTEM | |
| DE19811722C1 (en) | Apparatus for vacuum refining of metal, in particular, steel melts | |
| DE102016001246A1 (en) | Method and device for desulphurizing an iron melt | |
| DE2228462A1 (en) | DEVICE AND METHOD FOR MANUFACTURING LOW-CARBON, HIGH-CHROME-ALLOY STEELS | |
| SU1636464A1 (en) | Process for refining aluminum and its alloys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE FR GB IT |
|
| RAX | Requested extension states of the european patent have changed |
Free format text: SI PAYMENT 940615 |
|
| 17P | Request for examination filed |
Effective date: 19950711 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VARTA BATTERIE AKTIENGESELLSCHAFT Owner name: MESSER GRIESHEIM GMBH |
|
| 17Q | First examination report despatched |
Effective date: 19980302 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19990113 |