EP0152332B1 - Bleireinigungsverfahren - Google Patents

Bleireinigungsverfahren Download PDF

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Publication number
EP0152332B1
EP0152332B1 EP85400154A EP85400154A EP0152332B1 EP 0152332 B1 EP0152332 B1 EP 0152332B1 EP 85400154 A EP85400154 A EP 85400154A EP 85400154 A EP85400154 A EP 85400154A EP 0152332 B1 EP0152332 B1 EP 0152332B1
Authority
EP
European Patent Office
Prior art keywords
lead
caldron
fact
temperature
insulator
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
Application number
EP85400154A
Other languages
English (en)
French (fr)
Other versions
EP0152332A2 (de
EP0152332A3 (en
Inventor
Georges Althabegoity
Benoit Bied-Charreton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metaleurop SA
Original Assignee
Metaleurop SA
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Filing date
Publication date
Application filed by Metaleurop SA filed Critical Metaleurop SA
Priority to AT85400154T priority Critical patent/ATE45188T1/de
Publication of EP0152332A2 publication Critical patent/EP0152332A2/de
Publication of EP0152332A3 publication Critical patent/EP0152332A3/fr
Application granted granted Critical
Publication of EP0152332B1 publication Critical patent/EP0152332B1/de
Expired legal-status Critical Current

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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

Definitions

  • the subject of the present invention is a new process for purifying an impure lead, often called "working lead”.
  • the lead is generally produced in a reduction furnace such as ovens called “water-jackets", rotary ovens or else by ISP (Imperial Smelting Process) processes and leaves these ovens - at a temperature of 1000 ° C approx.
  • a reduction furnace such as ovens called “water-jackets”, rotary ovens or else by ISP (Imperial Smelting Process) processes and leaves these ovens - at a temperature of 1000 ° C approx.
  • metals or metaloids are soluble in lead.
  • metals metalloids or compounds, mention may be made of C U2 S, PbS, Cu, As, Sb, Sn, etc.
  • Skimming removes these impurities and gives a purer lead.
  • this process has many drawbacks because it can only be carried out discontinuously. It is formed on the surface of large blocks which are difficult to skim and remove. We even obtain pasty products which do not allow any automatic recovery.
  • the patent FR-1 369 339 describes a skimming operation which consists in continuously mixing working metal at a high temperature with recycled working metal having a lower temperature and a lower copper content.
  • the surface of the bath being maintained at a temperature above the melting point of the foam so that the latter can flow through the outlet opening suitably placed.
  • This process has allowed continuous purification of lead but lacks a lot of flexibility since it is necessary to maintain the relationships between sulfur, arsenic and copper within a certain range while maintaining the arsenic content at fairly low levels. This process is therefore not applicable to ores which lead to lead which deviates from certain copper, sulfur and arsenic contents.
  • this object has been achieved by means of a process for the continuous purification of working lead by quenching, characterized in that said liquid working lead is introduced at approximately 1000 ° C. into a thermostatted cauldron containing liquid metallic lead at a temperature below about 500 ° C and with stirring and by the fact that the pulverulent materials which collect on the surface are recovered.
  • agitation must have two components, a peripheral component and a radial or convection component.
  • the latter which corresponds to the downward movement along the axis of the tank towards the bottom then along the bottom towards the peripheral of the tank, then upwards along the walls and finally on the surface of the bath of the peripheral towards the center is very important for the heat exchange between the lead to be purified and the walls of the tank and for maintaining a low temperature gradient.
  • the other component, the peripheral also plays a role in maintaining a low temperature gradient because a high peripheral linear speed induces vortex movements, which, through the heat exchanges they facilitate between the lead-vessel interface and the lead located more inside said tank ensures a certain thermal homogeneity in the lead bath. Good results can be obtained by choosing a peripheral speed between 0.5 and 5 meters per second.
  • the speed of the convection component in the vicinity of the vertical walls of the tank is advantageously chosen to be less than the peripheral speed, preferably 0.1 to 0.5 times. the latter.
  • the speed in the vicinity of the walls and the bottom of the tank, resulting from the combination of these two components, is such that there is advantageously a difference of at most 20, preferably at most 10 ° C, between the temperature of the wall of the tank and that of lead 5 centimeters from this wall.
  • These components can be produced, for example, with two types of agitation mobile, the convection component with a turbine agitator whose diameter is less than half the diameter of the tank and the peripheral component with one or more mobile with substantially vertical blades. .
  • the temperature of the cauldron is maintained very precisely at the chosen value, lower than 500 ° C, preferably between 400 and 450 ° C, and it is necessary that this regulation is carried out with a tolerance lower than 20 ° C. Indeed, it should not be too high in temperature, otherwise we would get the pasty products mentioned above or large blocks.
  • this device for purifying lead from work is characterized in that it comprises a cauldron 1 surrounded by an insulator 3, a space 2 being formed between the insulator 3 and the cauldron 1 to allow air to circulate in this space, to cool the cauldron said air being injected by means of a pipe 4 and evacuated by an annular opening 5 located at the upper part of the cauldron, the insulator 3 being covered with 'A coil 6 for heating the cauldron by induction.
  • °, will be chosen as insulator. C, for an average temperature of 500 ° C.
  • this device allows the evacuation of calories through the walls of the cauldron while maintaining a very small temperature gradient within the latter and this by means of air circulation, or any other suitable fluid than If the temperature in the cauldron drops too quickly or a temperature gradient between the outer wall and the bath is too high, it is possible to quickly add a significant amount of heat by means of the winding which works by induction.
  • the cauldron must also be equipped with a device for extracting powdery dirt.
  • This device can be chosen from all the already known devices operating at said temperatures. We can cite for example pneumatic vacuum cleaners, wheels, shovels ...
  • This extraction of dross can be carried out in two different ways: either directly in the quenching cauldron, or in another tank placed in series. For a series installation, it is advantageous to have a tank placed in series.

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  • 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)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of El Displays (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Paper (AREA)
  • Glass Compositions (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Processing Of Solid Wastes (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Claims (9)

1. Verfahren zur kontinuierlichen Reinigung von Werkblei durch Abschrecken, gekennzeichnet durch Einführen des flüssigen Werkbleis bei etwa 1000° C in einen thermostatisierten Kessel, der gerührtes flüssiges metallisches Blei bei einer Temperatur unter etwa 500°C enthält, und Wiedergewinnen des sich auf der Oberfläche ansammelnden pulverigen Materials.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Rühren so durchgeführt wird, daß der Temperaturunterschied zwischen der Kesselwand und dem sich in 5 cm Abstand von der Wand befindlichen Blei höchstens 20° C beträgt.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Temperatur des Bleis im Kessel auf einem vorher bestimmten Wert mit einer Toleranz unter 20°C gehalten wird.
4. Verfahren nach einem der Ansprüche 1 - 3, in dem das einer ersten Reinigung unterworfene Blei einer weiteren Reinigung zugeführt wird, gekennzeichnet durch Einführen des flüssigen Werkbleis in einen thermostatisierten Kessel, der gerührtes flüssiges metallisches Blei bei einer Temperatur von 320 bis 340°C (zwei wichtige Zahlen) enthält, und Wiedergewinnen des sich auf der Oberfläche ansammelnden pulverigen Materials.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß im Lauf der zweiten Reinigungsstufe Verbindungen zugegeben werden, die Schwefel freisetzen können.
6. Vorrichtung zur Reinigung von Werkblei, gekennzeichnet durch - einen von einer Isolierung (3) umgegebenen Kessel (1), - einen Raum (2) zwischen der Isolierung (3) und dem Kessel (1) zur Zirkulation von Luft in diesem Raum und Abkühlen des Kessels, wobei die Luft durch eine Leitung (4) eingeblasen und durch eine Ringöffnung (5) im oberen Teil des Kessels abgezogen wird und die Isolierung (3) von einer Wickelung (6) umgeben ist, durch die der Kessel durch Induktion erhitzt werden kann.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Isolierung eine thermische Leitfähigkeit unter 0,05 kcal/m/h/°C aufweist.
8. Vorrichtung nach Anspruch 6 oder 7, gekennzeichnet außerdem durch eine Extraktionsvorrichtung für die Schlacke, ausgewählt unter pneumatischen Absaugern, Rädern und Schaufeln.
9. Vorrichtung nach einem der Ansprüche 6 - 8, dadurch gekennzeichnet, daß der Kessel mit einem anderen Kessel verbunden ist, in dem dekantiert wird und der mit Extraktionssystemen für die Schlacke ausgerüstet ist.
EP85400154A 1984-02-03 1985-01-31 Bleireinigungsverfahren Expired EP0152332B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400154T ATE45188T1 (de) 1984-02-03 1985-01-31 Bleireinigungsverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8401740 1984-02-03
FR8401740A FR2559161A1 (fr) 1984-02-03 1984-02-03 Nouveau procede de purification du plomb

Publications (3)

Publication Number Publication Date
EP0152332A2 EP0152332A2 (de) 1985-08-21
EP0152332A3 EP0152332A3 (en) 1985-09-18
EP0152332B1 true EP0152332B1 (de) 1989-08-02

Family

ID=9300771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400154A Expired EP0152332B1 (de) 1984-02-03 1985-01-31 Bleireinigungsverfahren

Country Status (13)

Country Link
EP (1) EP0152332B1 (de)
JP (1) JPH0613740B2 (de)
AT (1) ATE45188T1 (de)
BR (1) BR8505003A (de)
CA (1) CA1259494A (de)
DE (1) DE3572010D1 (de)
ES (1) ES540013A0 (de)
FI (1) FI78124C (de)
FR (1) FR2559161A1 (de)
GR (1) GR850275B (de)
MA (1) MA20339A1 (de)
MX (1) MX168094B (de)
WO (1) WO1985003526A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659665B1 (fr) * 1990-03-15 1992-07-24 Metaleurop Sa Procede d'affinage, notamment de decuivrage, du plomb.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956871A (en) * 1958-02-10 1960-10-18 American Smelting Refining Vacuum dezincing of lead
FR1369339A (fr) * 1962-12-27 1964-08-14 Broken Hill Ass Smelter Procédé d'écumage du cuivre de plomb non raffiné et appareil pour sa mise en oeuvre
ES302999A1 (es) * 1963-08-12 1965-01-16 Metallgesellschaft Ag Un procedimiento para la extracciën continua de cobre y compuestos de cobre contenidos en el plano
DE2803858C2 (de) * 1978-01-30 1983-09-15 Klöckner-Humboldt-Deutz AG, 5000 Köln Anlage zur kontinuierlichen Raffination von schmelzflüssigem Rohmaterial, insbesondere von Rohblei oder Rohzinn
IN159763B (de) * 1982-07-16 1987-06-06 Bnf Metals Tech Centre
US4425160A (en) * 1982-11-23 1984-01-10 Gnb Batteries Inc. Refining process for removing antimony from lead bullion
US4427629A (en) * 1982-11-23 1984-01-24 Gnb Batteries Inc. Process for metal-enrichment of lead bullion

Also Published As

Publication number Publication date
MX168094B (es) 1993-05-03
ES8602146A1 (es) 1985-11-16
FI850430A0 (fi) 1985-02-01
BR8505003A (pt) 1986-01-21
FI850430L (fi) 1985-08-04
JPS60234929A (ja) 1985-11-21
WO1985003526A1 (fr) 1985-08-15
FI78124B (fi) 1989-02-28
ES540013A0 (es) 1985-11-16
JPH0613740B2 (ja) 1994-02-23
EP0152332A2 (de) 1985-08-21
EP0152332A3 (en) 1985-09-18
ATE45188T1 (de) 1989-08-15
FR2559161A1 (fr) 1985-08-09
GR850275B (de) 1985-05-28
MA20339A1 (fr) 1985-10-01
CA1259494A (fr) 1989-09-19
DE3572010D1 (en) 1989-09-07
FI78124C (fi) 1989-06-12

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