EP0133535A2 - Procédé et installation pour le traitement thermique d'un matériau à grains fins - Google Patents

Procédé et installation pour le traitement thermique d'un matériau à grains fins Download PDF

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Publication number
EP0133535A2
EP0133535A2 EP84109057A EP84109057A EP0133535A2 EP 0133535 A2 EP0133535 A2 EP 0133535A2 EP 84109057 A EP84109057 A EP 84109057A EP 84109057 A EP84109057 A EP 84109057A EP 0133535 A2 EP0133535 A2 EP 0133535A2
Authority
EP
European Patent Office
Prior art keywords
zone
partial flow
separating cyclone
cooling
cooled
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Withdrawn
Application number
EP84109057A
Other languages
German (de)
English (en)
Other versions
EP0133535A3 (fr
Inventor
Gerhard Irmin Ernst Butschko
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius 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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0133535A2 publication Critical patent/EP0133535A2/fr
Publication of EP0133535A3 publication Critical patent/EP0133535A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • F27B15/003—Cyclones or chain of cyclones

Definitions

  • the invention relates to a method according to the preamble of claim 1, furthermore a system for performing this method.
  • the preheated and calcined material is first cooled to the appropriate temperature before hot briquetting. This is usually done by means of a cooling air stream which then flows as combustion air to the calcining zone, the hot exhaust gases from the calcining zone being passed through the preheating zone for the purpose of preheating the material.
  • the invention is therefore based on the object of developing a method of the type required in the preamble of claim 1 in such a way that, despite the cooling air quantity being kept constant, there is a constant material temperature in the heat treatment zone downstream of the cooling zone with different material throughput quantities.
  • the goods temperature in the heat treatment zone downstream of the cooling zone can be kept at the optimum value even with fluctuating throughput rates and constant cooling air volume.
  • the throughput quantity of goods and correspondingly stronger cooling of the partial flow of the goods passing through the cooling zone an increasingly larger partial flow of the calcined goods is bypassed past the cooling zone.
  • the mixing temperature of the material (consisting of the two partial flows of the cooled and non-cooled goods) are continuously measured and the distribution of the calcined goods between the two partial flows is regulated in the sense of keeping the mixing temperature constant.
  • the illustrated plant for the thermal treatment of fine-grained material such as magnesite or dolomite, comprising a preheating zone 1, a calcining zone 2, a cooling zone 3, a H apportbrikettierzone 4 and a sintering zone. 5
  • the preheating zone 1 contains three cyclones 6, 7, 8, the calcining zone 2 a combustion chamber 9, a riser 10 forming the actual reaction zone and a separating cyclone 11.
  • the cooling zone 3 is provided with a fan 12 which supplies the cooling air, a cooling air line 13 and a separating cyclone 14 equipped.
  • the hot briquetting zone 4 is illustrated schematically by two briquetting rollers 15. The details of the sintering zone 5, which is formed, for example, by a rotary kiln, are not shown.
  • Cooling air is supplied from the fan 12 to the cooling zone 3 and then flows to the calcining zone 2 as combustion air.
  • Their exhaust gases pass through the cyclones of the preheating zone 1.
  • the material that is given up at 16 passes through the cyclones 6, 7 and 8 of the preheating zone 1, then enters the riser 10 of the calcining zone 2 at 17, which also contains hot gases from the combustion chamber 9 and / or fuel (at 18) are supplied.
  • the calcined material separated in the cyclone 11 arrives via a distributor element 19 (see FIG. 2) either (line 20) in the cooling air line 13 or (line 21) in a swirl tank 22 which connects to the lower part of the separating cyclone 14.
  • the mixing temperature of the material supplied to the hot briquetting zone 4 (arrow 25) can be kept at an optimal value even in the event of fluctuations in the total material throughput quantity and approximately constant cooling air quantity.
  • annular step is present between the lower end of the separating cyclone 14 and the swirl container 22.
  • the openings 26 are provided for introducing the partial flow of uncooled material.
  • a central, mushroom-shaped installation body 27 is also attached, the diameter of which is at most equal to the diameter of the immersion tube 28 of the separating cyclone 14.
  • the clear cross-sectional area of the annular gap surrounding the installation body 27 is at least as large as the clear cross-sectional area of the lower discharge opening 29 of the swirling container 22.
  • the clacinated material is cooled by means of cooling air before being fed to the hot briquetting zone and separated in a cyclone.
  • the material emerging from the calcining zone has, for example, a temperature of 1000 ° C. and is cooled to about 500 ° C. by the cooling air.
  • a temperature of 328 ° C is set at 50% good throughput. If the amount of air is also reduced to 50% of the normal amount, a good temperature of 490 ° C results at a good throughput of 50%, but a flow velocity of about 8.5 m / s in the riser, i.e. a value at which the system cannot be operated properly.
  • Fig. 3 shows the flow rate at different throughputs (50, 70 and 100%) depending on the temperature of the refrigerated goods.
  • a temperature of the refrigerated goods of 450 ° C can be maintained by reducing the amount of cooling air and thus the flow rate; however, setting other temperatures is only possible within narrow limits. These limits are:
  • a constant good discharge temperature of 600 ° C is maintained under the same conditions by a bypass quantity of 28 to 49% of the total throughput quantity of 100% to 50% (line c-d).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Furnace Details (AREA)
  • Heat Treatment Of Articles (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP84109057A 1983-08-12 1984-07-31 Procédé et installation pour le traitement thermique d'un matériau à grains fins Withdrawn EP0133535A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3329234 1983-08-12
DE19833329234 DE3329234A1 (de) 1983-08-12 1983-08-12 Verfahren und anlage zur thermischen behandlung von feinkoernigem gut

Publications (2)

Publication Number Publication Date
EP0133535A2 true EP0133535A2 (fr) 1985-02-27
EP0133535A3 EP0133535A3 (fr) 1987-01-07

Family

ID=6206454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109057A Withdrawn EP0133535A3 (fr) 1983-08-12 1984-07-31 Procédé et installation pour le traitement thermique d'un matériau à grains fins

Country Status (3)

Country Link
EP (1) EP0133535A3 (fr)
DE (1) DE3329234A1 (fr)
NO (1) NO843206L (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3612381C2 (de) * 1986-04-12 1994-05-11 Werner Block Verfahren zur Aufbereitung von Filterstäuben oder Baggerschlämmen, insbesondere Hafenschlamm, für die Endlagerung
DE3925474A1 (de) * 1989-08-01 1991-02-07 Krupp Polysius Ag Verfahren zur waermebehandlung von feinkoernigem gut

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1434091A (en) * 1973-04-30 1976-04-28 Smidth & Co As F L Plant for burning or heat treatment of granular or pulverous material
NZ182202A (en) * 1975-10-15 1979-03-28 Smidth & Co As F L Kiln plant with inclined rotary kiln:device for lowering temperature at upper kiln end
DE2554989A1 (de) * 1975-12-06 1977-06-16 Kloeckner Humboldt Deutz Ag Verfahren zur herstellung von sinterprodukten aus einem feinkoernigen gut, insbesondere von zement und vorrichtung zur durchfuehrung des verfahrens
DE3131023C2 (de) * 1981-08-05 1985-12-05 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und Vorrichtung zum Brennen von Kalk
US4381916A (en) * 1981-09-11 1983-05-03 Fuller Company Method and apparatus for roasting fine grained ores
US4366000A (en) * 1981-10-13 1982-12-28 Wadia Darius A Method and apparatus for preheating dry raw meal prior to introduction of the meal into a suspension cyclone preheater system supplying a rotary kiln

Also Published As

Publication number Publication date
EP0133535A3 (fr) 1987-01-07
NO843206L (no) 1985-02-13
DE3329234A1 (de) 1985-02-21

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Inventor name: BUTSCHKO, GERHARD IRMIN ERNST