EP0053848B1 - Procédé d'insufflation de gaz à teneur élevée en oxygène dans un bain de fusion de métaux non-ferreux - Google Patents

Procédé d'insufflation de gaz à teneur élevée en oxygène dans un bain de fusion de métaux non-ferreux Download PDF

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Publication number
EP0053848B1
EP0053848B1 EP81201257A EP81201257A EP0053848B1 EP 0053848 B1 EP0053848 B1 EP 0053848B1 EP 81201257 A EP81201257 A EP 81201257A EP 81201257 A EP81201257 A EP 81201257A EP 0053848 B1 EP0053848 B1 EP 0053848B1
Authority
EP
European Patent Office
Prior art keywords
slag
nozzles
temperature
process according
pressure
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
EP81201257A
Other languages
German (de)
English (en)
Other versions
EP0053848A1 (fr
EP0053848B2 (fr
Inventor
Werner Dr.-Ing. Schwartz
Peter Dr.-Ing. Fischer
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0053848A1 publication Critical patent/EP0053848A1/fr
Publication of EP0053848B1 publication Critical patent/EP0053848B1/fr
Application granted granted Critical
Publication of EP0053848B2 publication Critical patent/EP0053848B2/fr
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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • 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
    • C22B13/02—Obtaining lead by dry processes
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0041—Bath smelting or converting in converters
    • 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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the invention relates to a method for blowing in highly oxygen-containing gases into a molten bath containing non-ferrous metals by means of double tube nozzles immersed in the melt through the reactor wall, a protective fluid being blown in as a coolant through the annular space between the inner and outer tube of each double tube nozzle.
  • gases containing high oxygen - technically pure oxygen or gases enriched with oxygen - are blown into a melt.
  • Such processes e.g. Non-ferrous metals or stone phases enriched with non-ferrous metals produced from sulphide ores or refined melts containing non-ferrous metals.
  • the high-oxygen gases are blown into the melt from the bottom or from the side through the masonry of a reactor using nozzles.
  • a protective fluid is blown in to protect the nozzles and the surrounding masonry against the high temperatures occurring at the nozzles. This is done using double tube nozzles.
  • the inner tube is generally used to inject the highly oxygen-containing gas and the protective fluid that cools through the annular space between the inner and outer tubes.
  • Such methods are e.g. B. from DE-OS 2 417 979 and DE-OS 2 807 964 known.
  • the invention is based, to reduce or avoid the wear of the double tube nozzles and the surrounding masonry when blowing in highly oxygen-containing gases with protective fluids in melting baths containing non-ferrous metals.
  • the amount of protective fluid is adjusted depending on the composition of the slag and the temperature difference of the slag from the solidification point in such a way that approaches are formed on the nozzles on the one hand, and on the other hand the approaches do not exceed a desired thickness.
  • the thickness of the lugs on the nozzles and the surrounding masonry is chosen so that the desired protection is achieved on the one hand, but on the other hand the lugs are gas-permeable and gas distribution is achieved. The thickness depends on the operating conditions of the process and is determined empirically. In the case of continuous processes, the required amount of protective fluid remains largely constant, whereas in batch-operated processes it has to be regulated in larger areas.
  • Flammable and non-flammable gases or liquids such as nitrogen, SO 2 , CO 2 , water vapor, hydrocarbons, can be used as protective fluids. Your selection depends on the procedural conditions.
  • the amount of protective fluid required to generate the batches depends on the solidification temperature of the slag or high-melting components of the slag and the temperature difference of the slag from this solidification temperature before it comes into contact with the protective fluid.
  • the outlet cross section for the protective fluid should be as small as possible and the protective fluid should be blown in under high pressure, for example above 6 bar, so that the required amount of protective fluid can be kept as small as possible.
  • a preferred embodiment consists in that the composition and temperature of the slag is adjusted so that even with a slight local cooling of the slag at the nozzles, the crystallization temperature of high-melting constituents - originally dissolved in the slag - is not reached.
  • the composition of the slag is adjusted so that it is almost saturated with high-melting compounds, such as magnetite, calcium silicates or similar compounds. This is achieved by a corresponding chemical composition of the slag, a corresponding oxidation potential, which depends on the desired metal-sulfide-oxide balance of the non-ferrous metal to be obtained, and by a corresponding temperature of the slag, which is just above the saturation temperature for the high-melting point Connections. This creates a good build-up with small amounts of protective fluids.
  • a preferred embodiment consists in that the stirring effect of the gases blown in through the nozzles is adjusted such that an emulsion of slag and metal reaches the nozzles regardless of the layer height of a metal bath on the bottom of the reactor.
  • the stirring effect of the injected gases can be regulated by adjusting their pressure or quantity accordingly and / or by adjusting the thickness of the metal layer above the nozzles. This also creates a good approach.
  • a preferred embodiment consists in that the thickness of the lugs is adjusted to a desired value by regulating the pressure rise of the flowing protective fluid compared to the original pressure. Due to the build-up, there is an increase in pressure compared to that exists before the formation of the batch. The value of the pressure increase depends on the thickness and the shape of the approaches. The value of the pressure rise, which corresponds to the desired thickness of the approaches, is determined empirically and adhered to. In most cases, a pressure increase of around 0.1 to 0.5 bar is sufficient. This allows the thickness of the approaches to be regulated in a simple manner, although direct observation is not possible.
  • a preferred embodiment of the invention consists in that the desired value of the pressure is regulated by keeping the pressure constant. Only the pressure is kept constant and the volume adjusts to the corresponding value. This enables a particularly simple and effective regulation of the thickness of the approaches.
  • a preferred embodiment is that the reactor is bricked up depending on the composition of the slag and temperature in such a way that a constant film of high-melting constituents forms on the masonry.
  • the lining is chosen so that the heat radiation cools the slag on the inside in such a way that a thin starting film is formed. This also protects the masonry in the vicinity of the nozzles, on which no deposits form due to the direct action of the protective fluid.
  • the examples relate to the continuous oxidation of sulfidic concentrates in a refractory-lined reactor in the form of a horizontal cylinder with a length of 4.50 m and a diameter of 1.80 m.
  • Additives were added to the sulfidic concentrates in order to produce slags of a certain chemical composition suitable for carrying out the process according to the invention.
  • the reactor was equipped with 3 double tube nozzles with an inner tube diameter of 10 mm and a propane-oxygen auxiliary burner in order to be able to influence the temperature of the melt independently of the chemical-metallurgical reactions taking place.
  • the examples are limited to the oxidation of sulfidic lead concentrates, the slags formed here behave particularly aggressively because of their lead oxide content in relation to all metallic and ceramic materials known in the art.
  • the measures described in the examples for protecting the nozzles and masonry of the reactor can therefore be appropriately applied to the melting of a number of other non-ferrous metal-containing precursors and intermediates, including concentrates, stones, food, slags, dusts and sludges with contents Transfer copper, nickel, cobalt, zinc, lead, tin, antimony or bismuth.
  • the mouthpiece of the third nozzle had been covered with a porous, cone-shaped attachment of approximately 30 mm in height and 50 mm in base diameter, which consisted of 70% magnetite and 30% different silicates.
  • the masonry in the vicinity of the other two nozzle mouthpieces had funnel-shaped traces of corrosion about 50 or 100 mm in diameter, the depth of which corresponded to the nozzle burn-off. In contrast, the masonry around the third nozzle was completely preserved.
  • Example 1 To test the influence of overheating of the slag, three tests were carried out at different temperatures of the slag. The flow rates of the protective fluid (6.9 bar nitrogen pressure) used in Example 1 for the second nozzle were set here. At the end of the tests, the nozzles were again drawn and measured:
  • the reactor was successively filled with a pure lead oxide slag (PbO) and a lead silicate slag with the approximate composition 2Pb0 - Si0 2 .
  • PbO lead oxide slag
  • a slag temperature of 930 ° C was set, while the nozzles were operated with oxygen and a nitrogen pressure of 6.9 bar.
  • no mixture of concentrate and additives was added in order not to change the composition of the slag.
  • neither of the two experiments could a firm approach be created in front of the nozzle mouthpieces.
  • the nozzles and the surrounding masonry were almost destroyed:
  • the thickness of the metallic soil phase must be taken into account, provided that it consists of a low-melting metal.
  • the advantages of the invention are that the nozzles and the surrounding masonry are protected from chemical attack and erosion by the molten phase with simple means, the amount of protective fluid is kept to a minimum and nevertheless a good gas distribution in the melt is achieved.

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)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Details (AREA)

Claims (6)

1. Procédé d'insufflation de gaz à teneur élevée en oxygène, dans un bain de fusion contenant des métaux non ferreux, au moyen de buses à tubes doubles plongées à travers la paroi du réacteur dans le bain de fusion, un fluide de protection servant d'agent réfrigérant étant insufflé dans l'espace annulaire compris entre le tube intérieur et le tube extérieur de chaque buse à tubes doubles, caractérisé en ce qu'il consiste à régler la quantité de fluide de protection en fonction de la composition du laitier et de la différence de température entre le laitier et le point de solidification, de manière, d'une part, à former des dépôts sur les buses et, d'autre part, à ce que les dépôts ne dépassent pas une épaisseur souhaitée.
2. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à régler la composition et la température du laitier de façon à ce que, dès qu'il se produit un faible refroidissement localisé. du laitier, la température sur les buses devient inférieure à la température de cristallisation de constituants à point de fusion élevé -dissous à l'origine dans le laitier.
3. Procédé suivant la revendication 1 ou 2, caractérisé en ce qu'il consiste à régler l'effet d'agitation des gaz insufflés par les buses de façon à ce que, indépendamment de la hauteur de couche d'un bain métallique sur le fond du réacteur, une émulsion de laitier et de métal atteigne les buses.
4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce qu'il consiste à effectuer le réglage de l'épaisseur des dépôts à une valeur souhaitée, en réglant l'élévation de pression du fluide de protection qui s'écoule par rapport à la pression d'origine.
5. Procédé suivant la revendication 4, caractérisé en ce qu'il consiste à régler la valeur souhaitée de la pression en maintenant la pression constante.
6. Procédé suivant l'une des revendications 1 à 5, caractérisé en ce qu'il consiste à maçonner le réacteur en fonction de la composition du laitier et de la température de façon à former une pellicule constante de constituants à point de fusion élevé sur la maçonnerie.
EP81201257A 1980-12-05 1981-11-11 Procédé d'insufflation de gaz à teneur élevée en oxygène dans un bain de fusion de métaux non-ferreux Expired EP0053848B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3045992 1980-12-05
DE19803045992 DE3045992A1 (de) 1980-12-05 1980-12-05 Verfahren zum einblasen von hochsauerstoffhaltigen gasen in ein ne-metalle enthaltendes schmelzbad

Publications (3)

Publication Number Publication Date
EP0053848A1 EP0053848A1 (fr) 1982-06-16
EP0053848B1 true EP0053848B1 (fr) 1984-10-24
EP0053848B2 EP0053848B2 (fr) 1987-10-14

Family

ID=6118459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81201257A Expired EP0053848B2 (fr) 1980-12-05 1981-11-11 Procédé d'insufflation de gaz à teneur élevée en oxygène dans un bain de fusion de métaux non-ferreux

Country Status (17)

Country Link
US (1) US4435211A (fr)
EP (1) EP0053848B2 (fr)
JP (1) JPS57120626A (fr)
KR (1) KR890002800B1 (fr)
AU (1) AU542613B2 (fr)
BR (1) BR8107861A (fr)
CA (1) CA1180194A (fr)
DE (2) DE3045992A1 (fr)
ES (1) ES8300871A1 (fr)
FI (1) FI68659C (fr)
IN (1) IN152960B (fr)
MA (1) MA19349A1 (fr)
MX (1) MX156287A (fr)
PH (1) PH19449A (fr)
PL (1) PL234079A1 (fr)
YU (1) YU42003B (fr)
ZA (1) ZA817664B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014835A1 (de) * 1989-05-12 1990-11-15 Air Liquide Verfahren zur oxidationsbehandlung eines fluessigen bades

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
US4661153A (en) * 1983-07-01 1987-04-28 Southwire Company Refractory porous plug
DE3814310A1 (de) * 1988-04-28 1989-11-09 Messer Griesheim Gmbh Verfahren zur raffination von si-metall und si-eisenlegierungen
CA2041297C (fr) * 1991-04-26 2001-07-10 Samuel Walton Marcuson Convertisseur et methode de gonflage par le haut d'un metal non ferreux
US5435833A (en) * 1993-09-30 1995-07-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment
US5814126A (en) * 1994-01-12 1998-09-29 Cook; Thomas H. Method and apparatus for producing bright and smooth galvanized coatings
DE4429937A1 (de) * 1994-08-24 1996-02-29 Metallgesellschaft Ag Verfahren zum Verblasen von NE-Metall-Schrott und Hütten-Zwischenprodukten
DE19638148A1 (de) * 1996-09-18 1998-03-19 Linde Ag Sauerstofflanze und Verfahren zum Verblasen von flüssigem Metall
DE10253535A1 (de) * 2002-11-16 2004-05-27 Sms Demag Ag Gaszuleitungssystem für einen metallurgischen Ofen sowie Betriebsverfahren hierzu
FR2856630B1 (fr) * 2003-06-26 2006-09-29 Jean Noel Claveau Procede de decoration d'un article et equipement pour la mise en oeuvre de ce procede
FR2856631B1 (fr) * 2003-06-26 2005-09-23 Jean Noel Claveau Procede de decoration d'un article et equipement pour la mise en oeuvre de ce procede
FR2881988B1 (fr) * 2005-02-15 2007-06-29 Jean Noel Claveau Procede de decoration d'un article et equipement pour la mise en oeuvre de ce procede
DE102010020179A1 (de) * 2009-06-09 2010-12-16 Sms Siemag Ag Verfahren zum Betreiben eines Bodenspülsystems eines BOF-Konverters
EP2302082B1 (fr) * 2009-09-03 2013-04-17 Linde AG Procédé destiné au fonctionnement d'un convertisseur et dispositif d'exécution du procédé

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US443758A (en) 1890-12-30 Process of converting copper matte to copper
US3892559A (en) 1969-09-18 1975-07-01 Bechtel Int Corp Submerged smelting
BE748041A (fr) * 1970-03-26 1970-09-28 Centre Rech Metallurgique Perfectionnements aux procedes d'affinage,
LU62933A1 (fr) * 1971-04-06 1973-05-16
FR2219235B2 (fr) * 1973-02-26 1976-05-14 Creusot Loire
BE795117A (fr) * 1973-02-07 1973-05-29 Centre Rech Metallurgique Procede et dispositif pour le convertissage de matieres cuivreuses
US3941587A (en) * 1973-05-03 1976-03-02 Q-S Oxygen Processes, Inc. Metallurgical process using oxygen
DE2504946C2 (de) 1975-02-06 1980-04-30 Kloeckner-Werke Ag, 4100 Duisburg Verfahren und Vorrichtung zum Einschmelzen von Schrott, Eisenschwamm, Pellets oder dgl

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014835A1 (de) * 1989-05-12 1990-11-15 Air Liquide Verfahren zur oxidationsbehandlung eines fluessigen bades
DE4014835C2 (de) * 1989-05-12 1999-11-04 Air Liquide Verfahren zur Oxidationsbehandlung eines flüssigen Bades

Also Published As

Publication number Publication date
CA1180194A (fr) 1985-01-02
BR8107861A (pt) 1982-09-08
DE3045992A1 (de) 1982-07-22
PH19449A (en) 1986-04-18
ZA817664B (en) 1982-10-27
YU42003B (en) 1988-04-30
IN152960B (fr) 1984-05-12
DE3166865D1 (en) 1984-11-29
US4435211A (en) 1984-03-06
AU542613B2 (en) 1985-02-28
ES507717A0 (es) 1982-11-01
MA19349A1 (fr) 1982-07-01
JPS57120626A (en) 1982-07-27
MX156287A (es) 1988-08-08
PL234079A1 (fr) 1982-07-19
ES8300871A1 (es) 1982-11-01
YU283681A (en) 1984-04-30
FI68659B (fi) 1985-06-28
KR890002800B1 (ko) 1989-07-31
FI813743L (fi) 1982-06-06
FI68659C (fi) 1985-10-10
AU7827981A (en) 1982-06-10
EP0053848A1 (fr) 1982-06-16
EP0053848B2 (fr) 1987-10-14
KR830007855A (ko) 1983-11-07
JPH0147532B2 (fr) 1989-10-16

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