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EP0193976A1 - 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
EP0193976A1
EP0193976A1 EP86200140A EP86200140A EP0193976A1 EP 0193976 A1 EP0193976 A1 EP 0193976A1 EP 86200140 A EP86200140 A EP 86200140A EP 86200140 A EP86200140 A EP 86200140A EP 0193976 A1 EP0193976 A1 EP 0193976A1
Authority
EP
European Patent Office
Prior art keywords
discharge slot
opening
cyclone
discharge
spiral
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.)
Granted
Application number
EP86200140A
Other languages
German (de)
English (en)
Other versions
EP0193976B1 (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.
  • 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 is designed as a channel-like partial spiral opening into a discharge slot with the cylinder wall and the discharge slot in the lower jacket region of the essentially cylindrical vessel is essentially parallel to its longitudinal axis is arranged.
  • 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 walls of the cyclone chamber are designed in a manner known per se as steam-cooled, pinned tube walls (17) lined with refractory material, a reliable wall protection being achieved by a thin layer of solidified melting products.
  • 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 generally has a circular cross cut.
  • 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 upward angle (a1) of the longitudinal axis 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 can be designed conically in the region of the angled longitudinal axis 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.
  • combustion shaft 1 and 2 of a cyclone of conventional design show in detail: the combustion shaft 1 with inlet cross-section 2, separation of the droplets 3 that are carried in the hot gas, wall film 4, melt surge 5, large drops 6 torn out of the surge, axially displaced partial flow 7, radially deflected main flow 8, gas outlet or collar 9, wall extension 10, secondary chamber 11, boiler tube wall 12 and central melt outlet 13.
  • the pre-invention Direction based on the processing of fine-grained solids resulting in molten products at pyrometallurgical treatment temperature and explained in more detail and example.
  • 7,000 kg / h of a complex copper concentrate according to the analysis below are fed to the burner (FIG. 8) from upstream bunker, drying, distributor and mixing systems with 390 m 3 primary air as carrier gas via a delivery pipeline.
  • the concentrate with a composition of a grain size between 0.5 and 100 / ⁇ m and a proportion of 53% in the range between 15 and 100 / ⁇ m has a residual moisture content of 0.1 to 0.3%.
  • Si0 2 is supplied in the form of sand in an amount of 1.3 t / h to the concentrate air stream before entering the burner in order to bind the iron oxide that forms in a slag.
  • sand with a residual moisture of 0.1% and a grain size of up to 0.7 mm is used.
  • the primary fluid flow consisting of 7,000 kg / h concentrate, 1,300 kg / h sand and 380 m 3 / h conveying air, is combined with a secondary flow mixture of 600 m 3 / h air and 1,800 m 3 / h oxygen.
  • the homogenized and vortex-free fluid jet is ignited after entering the vertical burner section (German patent application P 34 36 624).
  • 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.% 5 0 2 .
  • the exhaust gas entrains oxidic-sulfatic fly dust of the following composition:
  • This flue dust is separated in the waste heat boiler and gas cleaning systems downstream of the cyclone system.

Landscapes

  • 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)
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 true EP0193976A1 (fr) 1986-09-10
EP0193976B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4871147A (en) * 1985-03-02 1989-10-03 Norddeutsche Affinerie Aktiengesellschaft Apparatus for the pyrometallurgical processing of fine-grained solids
EP0464436A3 (en) * 1990-07-02 1992-03-25 Forschungszentrum Juelich Gmbh Cyclonic burner with cylindrical combustion chamber

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
BRPI0813805A2 (pt) * 2007-08-07 2014-12-30 Polysius Ag Dispositivo e método para a condução de reações químicas e/ou físicas entre um material sólido e um gás assim como instalação para a produção de cimento
KR100926449B1 (ko) 2008-03-24 2009-11-13 건국대학교 산학협력단 폐촉매의 재생장치

Citations (4)

* 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
DE2010872A1 (de) * 1970-03-07 1971-09-16 Babcock & Wilcox Ag Verfahren zur pyrometallurgischen Behandlung von sulfidischen Eisenerzen oder Eisenerzkonzentraten
DE2253074A1 (de) * 1972-10-28 1974-05-16 Babcock & Wilcox Ag Verfahren zur pyrometallurgischen behandlung von feststoffen
DE3203498A1 (de) * 1981-02-05 1982-08-12 Anton Piller GmbH & Co KG, 3360 Osterode Wirbelkammerfilter zum ausscheiden von feststoffen aus einem gasstrom

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (4)

* 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
DE2010872A1 (de) * 1970-03-07 1971-09-16 Babcock & Wilcox Ag Verfahren zur pyrometallurgischen Behandlung von sulfidischen Eisenerzen oder Eisenerzkonzentraten
DE2253074A1 (de) * 1972-10-28 1974-05-16 Babcock & Wilcox Ag Verfahren zur pyrometallurgischen behandlung von feststoffen
DE3203498A1 (de) * 1981-02-05 1982-08-12 Anton Piller GmbH & Co KG, 3360 Osterode Wirbelkammerfilter zum ausscheiden von feststoffen aus einem gasstrom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4871147A (en) * 1985-03-02 1989-10-03 Norddeutsche Affinerie Aktiengesellschaft Apparatus for the pyrometallurgical processing of fine-grained solids
EP0464436A3 (en) * 1990-07-02 1992-03-25 Forschungszentrum Juelich Gmbh Cyclonic burner with cylindrical combustion chamber

Also Published As

Publication number Publication date
ES8705926A1 (es) 1987-05-16
CN86100416A (zh) 1986-10-01
ES552533A0 (es) 1987-05-16
AU5423886A (en) 1986-09-04
PT82122B (pt) 1992-10-30
KR860007392A (ko) 1986-10-10
JPS61217537A (ja) 1986-09-27
FI860808A0 (fi) 1986-02-25
CA1272020A (fr) 1990-07-31
BR8600878A (pt) 1986-11-11
PL145099B1 (en) 1988-08-31
PL258160A1 (en) 1987-03-09
AU576671B2 (en) 1988-09-01
DE3660496D1 (en) 1988-09-15
FI860808A7 (fi) 1986-09-03
FI80478B (fi) 1990-02-28
DE3507371A1 (de) 1986-09-04
PT82122A (en) 1986-03-01
YU44281B (en) 1990-04-30
EP0193976B1 (fr) 1988-08-10
US4871147A (en) 1989-10-03
ZA861472B (en) 1987-10-28
FI80478C (fi) 1990-06-11
CN1013055B (zh) 1991-07-03
YU29586A (en) 1988-10-31

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