EP0193976B1 - Installation pour le traitement pyrométallurgique de matières solides pulvérulentes avec obtention de produits fondus - Google Patents

Installation pour le traitement pyrométallurgique de matières solides pulvérulentes avec obtention de produits fondus Download PDF

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Publication number
EP0193976B1
EP0193976B1 EP86200140A EP86200140A EP0193976B1 EP 0193976 B1 EP0193976 B1 EP 0193976B1 EP 86200140 A EP86200140 A EP 86200140A EP 86200140 A EP86200140 A EP 86200140A EP 0193976 B1 EP0193976 B1 EP 0193976B1
Authority
EP
European Patent Office
Prior art keywords
discharge slot
spiral
gas outlet
section
cyclone
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
EP86200140A
Other languages
German (de)
English (en)
Other versions
EP0193976A1 (fr
Inventor
Edgar Prof. Dr. Muschelknautz
Ernst Becker
Adalbert Bartsch
Lars Kersten
Georg Dr. Gospos
Gerhard Berndt
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.)
Aurubis AG
Original Assignee
Norddeutsche Affinerie 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
Application filed by Norddeutsche Affinerie AG filed Critical Norddeutsche Affinerie AG
Publication of EP0193976A1 publication Critical patent/EP0193976A1/fr
Application granted granted Critical
Publication of EP0193976B1 publication Critical patent/EP0193976B1/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
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • C22B5/14—Dry methods smelting of sulfides or formation of mattes by gases fluidised material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C1/00—Apparatus in which the main direction of flow follows a flat spiral ; so-called flat cyclones or vortex chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C3/06—Construction of inlets or outlets to the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C7/00—Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00

Definitions

  • the invention relates to a device for the pyrometallurgical treatment of fine-grained solids resulting in products which are molten at treatment temperatures.
  • DE-PS-2 253 074 discloses a process for the pyrometallurgical treatment of fine-grained solids which result in products which are molten at treatment temperatures, in which the solids suspended in oxygen-rich gases run at a high rate and prevent reignition be reacted in a vertical burning path.
  • the suspension formed which contains predominantly molten particles, is introduced into a horizontally arranged cyclone chamber.
  • hot gas with melting drops from the vertical cylindrical firing section enters tangentially at one end of the lying cylindrical cyclone chamber and centrally at the opposite end through a collar into a downstream secondary chamber.
  • the separated melt flows to the secondary chamber at the outlet end of the gas flow through a high, narrow slot, which is embedded below the collar in the vertical central plane of the end face.
  • Solid and preheated gas are blown into the cylindrical cyclone chamber from above along a secant without their own burning path. The entry is made over almost the entire length of the cyclone.
  • the gas flows to a secondary chamber through a collar inserted centrally in the end face.
  • the melt flows under the collar through a hole in the deepest part of the end wall also into the secondary chamber.
  • the object of the invention is to provide a device, in particular a cyclone chamber, for pyrometallurgical treatment of fine-grained solids, which avoids the disadvantages of known devices and in particular the aforementioned disadvantages.
  • the invention solves the problem with a device for the pyrometallurgical treatment of fine-grained solids suspended in oxygen-rich gases, with a horizontally arranged cylindrical vessel and the associated burner shaft opening vertically into the vessel, as well as with a gas discharge opening and discharge opening for melts.
  • a device of the type mentioned is designed according to the invention in such a way that the tangential opening of the combustion shaft extends the circular cross section of the cylindrical vessel in the form of a partial spiral and opens into a discharge slot, the discharge slot being open at the bottom and the outer jacket of the essentially cylindrical vessel breaks through substantially parallel to its longitudinal axis.
  • the measures of the invention are based on the knowledge that with a high solids load (melt particles) of the gas stream emerging from the combustion shaft, the melt particles are almost completely flung and in the first curve of the inlet bend against the container wall, where a closed and rapidly flowing film on the immediately steep cylinder wall.
  • the film's high flow rate drops to a fraction when the gradient in the lower area of the cyclone wall becomes smaller. That is, in such an undesirable case, the melt film is accumulated in waves in conventional cyclones, while a part of the gas flow on the waves or on the surge is deflected in the direct direction of the gas outlet as at a baffle. The part of the flow which is deflected upward by the surge then disadvantageously tears large drops from the liquid wave which, due to the dynamic pressure of the escaping gas flow, pulsates and bubbles considerably. The torn drops fly slowly and almost vertically upwards into the very restlessly rotating and oscillating vortex core of the cyclone flow, where they increasingly wobble axially towards the gas outlet. Faster and circling drops are just about to be separated, a part bakes in the gas outlet on the inner wall and a part is carried along with the flow through the gas outlet (Fig. 1 and 2).
  • the inventive arrangement is now advantageously achieved that in the tangential inlet spiral (14) practically in the first spiral section or arc, the molten particles from the gas stream and on the spiral wall as a film (4) and almost completely in the discharge slot or slot-like discharge channel (16) are transferred.
  • the melt runs as a jet through the discharge slot into a melt collecting container (19) (FIG. 3). From the collecting tank, the melt can possibly reach a forehearth, where the melt mixture is separated into the components if necessary.
  • a small part of the gas flow can - if arranged accordingly - e.g. B. exhaust gas opening (20) in the melting tank (19) - escape through the discharge slot (16) over the melting tank.
  • the walls of the cyclone chamber are designed in a manner known per se as steam-cooled, pinned tube walls (17) lined with refractory material, whereby they are solidified by a thin layer Melting products secure wall protection is achieved.
  • the wall surface (15) of the inlet spiral (14) runs flat, runs tangentially and forms the lower surface of the discharge slot (16).
  • This flat surface has a downward slope of approximately 20 to 45 ° to the horizontal.
  • the other (upper) surface delimiting the discharge slot starts at a point on the wall which lies on the continuation of the original wall spiral, which is interrupted by the discharge slot.
  • the discharge slot is generally equipped with parallel walls. However, at least one wall expediently diverges in the direction of the melt collecting container.
  • the burner shaft has a generally circular cross section.
  • the cross section of the tangential opening of the combustion shaft into the cyclone chamber is expediently elliptical. In many cases, a rectangular cross section is advantageous. From the inlet cross-section, the inlet spiral expands steadily and reaches approximately the length of the discharge slot. The length of the discharge slot (in the direction of the cyclone axis) is approximately up to 3 times the width of the inlet of the spiral.
  • a groove is located in the lining of the cyclone jacket at the lowest point and starting in the area of the gas outlet opening.
  • This channel (Fig. 3a; 18) runs with increasing depth to the discharge slot and is a kind of return for the melt film, which comes from the remaining melt particles still separated from the main gas stream.
  • the return channel begins with increasing depth at a distance of approximately 1/3 to 2/3 of the diameter value of the gas outlet opening and ends at the discharge slot.
  • the channel end has a width "B" of approximately 1/4 to 1/2 the diameter of the gas outlet opening.
  • the depth "T" of the return channel corresponds approximately to the width "B".
  • part of the cylindrical cyclone arranged horizontally is angled upwards; that is, a cylindrical section of the cyclone can be angled upwards as a whole, or only the lower half of the jacket can be angled upwards, so that a cyclone section is in the form of an asymmetrical cone.
  • the angling (a) of the longitudinal axis upwards is approximately 15 to 30 °, and the length of the angled cyclone section corresponds approximately to the length of the return channel installed in the lower cyclone jacket.
  • the entire cyclone jacket in the region of the angled longitudinal axis can be designed conically towards the gas outlet.
  • a large number of solids can be treated pyrometallurgically in the device according to the invention.
  • Non-ferrous metal ore concentrates and sulfidic ores are particularly suitable.
  • the device according to the invention is also suitable for the treatment of oxidic, optionally pre-reduced iron ores or iron ore concentrates and also for the treatment of metallurgical intermediates.
  • the advantage of the device according to the invention can be seen in the fact that a large number of solids can be used at a high gas loading density and can be treated pyrometallurgically and that the melting particles in the cyclone can be separated practically completely and above 95%. At high throughput, the device according to the invention has practically no susceptibility to failure.
  • the gas stream loaded with melt particles is introduced into the cyclone through the tangential inlet spiral (14) (FIG. 3).
  • the molten particles are practically separated from the gas flow on the spiral wall (4) in the first spiral section and almost completely transferred into the discharge slot (16).
  • the melt runs as a jet through the discharge slot (16) into a melt collecting container (19).
  • the walls of the cyclone chamber are designed in a manner known per se as steam-cooled, pinned and lined with refractory tube walls, a reliable wall protection being achieved by a thin layer of solidified melting products.
  • the process is autogenous.
  • fuel is additionally supplied in gaseous, liquid or solid form.
  • Copper stone and slag are removed together at a melting temperature of approx. 1,320 ° C through the slot discharge of the lying cyclone vessel.
  • the exhaust gas emerging from the cyclone vessel in the axial direction (FIGS. 3; 9) has a temperature of 1,320 ° C. and contains approx. 56 vol.% SO 2 .
  • This flue dust is separated in the waste heat boiler and gas cleaning systems downstream of the cyclone system.

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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)
  • Cyclones (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Claims (9)

1. Installation de traitent pyrométallurgique de matières solides en grains fins en suspension dans des gaz riches en oxygène, comprenant un récipient cylindrique, disposé horizontalement et une chambre de combustion communiquant avec celui-ci et y débouchant verticalement, ainsi qu'un orifice d'évacuation des gaz et un orifice de déchargement du produit fondu, caractérisée en ce que l'entrée tangentielle de la chambre de combustion élargit la section transversale circulaire du récipient cylindrique sous la forme d'une spirale partielle et débouche dans une fente de déchargement, ouverte vers le bas et coupant la face latérale extérieure du récipient sensiblement cylindrique sensiblement parallèlement a son axe longitudinal.
2. Installation suivant la revendication 1, caractérisée en ce que la surface inférieure de la fente est constituée par la surface latérale inférieure de la spirale d'entrée, qui est inclinée de 20 a 40° (par rapport a l'horizontale), qui est plane et qui part tangentiellement.
3. Installation suivant la revendication 1 ou 2, caractérisée en ce que la longueur de la fente de déchargement (suivant l'axe longitudinal du cylindre) correspond sensiblement à la largeur de la spirale d'entrée.
4. Installation suivant l'une des revendications 1 à 3, caractérisée en ce que la section transversale de l'entrée tangentielle de la chambre de combustion est elliptique à rectangulaire.
5. Installation suivant l'une des revendications 1 à 4, caractérisée en ce que la largeùr de la spirale d'entrée s'élargit d'une manière constante jusqu'à la longueur de la fente de déchargement et cette longueur représente à peu près jusqu à trois fois la largeur de l'entrée de la spirale.
6. Installation suivant l'une des revendications 1 à 5, caractérisée en ce que la partie inférieure de la surface latérale du récipient comporte une gouttière de retour qui est destinée à la réception du produit fondu et qui a une profondeur croissante de l'orifice de sortie des gaz à la fente de déchargement.
7. Installation suivant l'une des revendications 1 à 6, caractérisée en ce que la gouttière de retour commence à une distance représentant du 1/3 aux 2/3 de la distance "D" de l'orifice de sortie des gaz et se termine à la fente de déchargement, l'extrémité de la gouttière ayant une épaisseur "B" de D/4 à D/2 et une profondeur "T" avec T B.
8. Installation suivant l'une des revendications 1 à 7, caractérisée en ce que la partie du cyclone dans la région de la longueur de la gouttière de retour est coudée vers le haut, l'axe longitudinal étant coudé de 15 à 30° environ par rapport à l'horizontale.
9. Installation suivant l'une des revendications 1 à 8, caractérisée en ce que la moitié inférieure de la face latérale du cylone, qui comporte la gouttière de retour, s'étend coniquement d'une manière dissymétrique vers l'orifice de sortie des gaz.
EP86200140A 1985-03-02 1986-02-01 Installation pour le traitement pyrométallurgique de matières solides pulvérulentes avec obtention de produits fondus Expired EP0193976B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853507371 DE3507371A1 (de) 1985-03-02 1985-03-02 Vorrichtung fuer die pyrometallurgische behandlung feinkoerniger, schmelzfluessige produkte ergebender feststoffe
DE3507371 1985-03-02

Publications (2)

Publication Number Publication Date
EP0193976A1 EP0193976A1 (fr) 1986-09-10
EP0193976B1 true EP0193976B1 (fr) 1988-08-10

Family

ID=6263982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86200140A Expired EP0193976B1 (fr) 1985-03-02 1986-02-01 Installation pour le traitement pyrométallurgique de matières solides pulvérulentes avec obtention de produits fondus

Country Status (15)

Country Link
US (1) US4871147A (fr)
EP (1) EP0193976B1 (fr)
JP (1) JPS61217537A (fr)
KR (1) KR860007392A (fr)
CN (1) CN1013055B (fr)
AU (1) AU576671B2 (fr)
BR (1) BR8600878A (fr)
CA (1) CA1272020A (fr)
DE (2) DE3507371A1 (fr)
ES (1) ES8705926A1 (fr)
FI (1) FI80478C (fr)
PL (1) PL145099B1 (fr)
PT (1) PT82122B (fr)
YU (1) YU44281B (fr)
ZA (1) ZA861472B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507371A1 (de) * 1985-03-02 1986-09-04 Norddeutsche Affinerie AG, 2000 Hamburg Vorrichtung fuer die pyrometallurgische behandlung feinkoerniger, schmelzfluessige produkte ergebender feststoffe
DE4021005C1 (fr) * 1990-07-02 1991-08-14 Forschungszentrum Juelich Gmbh, 5170 Juelich, De
DE4415342C1 (de) * 1994-05-02 1995-09-07 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Verbrennen von Abfall
US6119607A (en) * 1997-05-09 2000-09-19 Corporation De L'ecole Polytechnique Granular bed process for thermally treating solid waste in a flame
US8439670B2 (en) * 2007-08-07 2013-05-14 Polysius Ag Device for separating a solid material and a gas and a plant for cement manufacture
KR100926449B1 (ko) 2008-03-24 2009-11-13 건국대학교 산학협력단 폐촉매의 재생장치

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE534727C (de) * 1927-10-14 1931-10-01 Adrien Dawans Vorrichtung und Verfahren zum Schmelzen von staubfoermigen Massen, insbesondere von Hochofengichtstaub
DE2010872B2 (de) * 1970-03-07 1972-02-17 Babcock & Wilcox Ag Verfahren zur pyrometallurgischen Behandlung von sulfidischen Eisenerzen oder Eisenerzkonzentraten
DE2253074C3 (de) * 1972-10-28 1983-12-22 Deutsche Babcock & Wilcox Ag, 4200 Oberhausen Verfahren zur pyrometallurgischen Behandlung von Feststoffen
DE3203498C2 (de) * 1981-02-05 1986-08-21 Anton Piller GmbH & Co KG, 3360 Osterode Abscheider für in einem Gasstrom suspendierte Feststoffe mittels Fliehkraft
DE3436624A1 (de) * 1984-10-05 1986-04-10 Norddeutsche Affinerie AG, 2000 Hamburg Vorrichtung zur erzeugung zuendfaehiger feststoff/gas-suspensionen
DE3507371A1 (de) * 1985-03-02 1986-09-04 Norddeutsche Affinerie AG, 2000 Hamburg Vorrichtung fuer die pyrometallurgische behandlung feinkoerniger, schmelzfluessige produkte ergebender feststoffe

Also Published As

Publication number Publication date
PL145099B1 (en) 1988-08-31
ES552533A0 (es) 1987-05-16
DE3507371A1 (de) 1986-09-04
YU44281B (en) 1990-04-30
FI860808A (fi) 1986-09-03
AU5423886A (en) 1986-09-04
FI860808A0 (fi) 1986-02-25
PT82122A (en) 1986-03-01
PL258160A1 (en) 1987-03-09
ZA861472B (en) 1987-10-28
US4871147A (en) 1989-10-03
FI80478B (fi) 1990-02-28
YU29586A (en) 1988-10-31
CA1272020A (fr) 1990-07-31
AU576671B2 (en) 1988-09-01
PT82122B (pt) 1992-10-30
ES8705926A1 (es) 1987-05-16
BR8600878A (pt) 1986-11-11
CN86100416A (zh) 1986-10-01
KR860007392A (ko) 1986-10-10
JPS61217537A (ja) 1986-09-27
DE3660496D1 (en) 1988-09-15
FI80478C (fi) 1990-06-11
CN1013055B (zh) 1991-07-03
EP0193976A1 (fr) 1986-09-10

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