US3744962A - Apparatus for firing or sintering fine material - Google Patents

Apparatus for firing or sintering fine material Download PDF

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Publication number
US3744962A
US3744962A US00178901A US3744962DA US3744962A US 3744962 A US3744962 A US 3744962A US 00178901 A US00178901 A US 00178901A US 3744962D A US3744962D A US 3744962DA US 3744962 A US3744962 A US 3744962A
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United States
Prior art keywords
fine material
firing
chamber
air
sintering
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 - Lifetime
Application number
US00178901A
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English (en)
Inventor
H Ritzmann
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
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 Polysius AG filed Critical Polysius AG
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Publication of US3744962A publication Critical patent/US3744962A/en
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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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones

Definitions

  • the invention relates to an apparatus for firing and- /or sintering of fine material, with an arrangement for preheating the fine material, a firing or sintering zone supplied with fuel, a fine material separator as well as a cooling apparatus, in which the firing or sintering zone is preceded by a mixing zone for the mixing of the preheated fine material with the preheated combustion air.
  • An apparatus of this general type is shown in U.S. Pat. No. 3,603,568 of Sept. 7, l97l.
  • 3,603,568 is distinguished by relatively low cost of construction and by the absence of moving parts, while making possible the attainment of a high throughput capacity, as compared with other known types of apparatus. Specifically, when the preheated fine material is mixed with the preheated combustion air, before these two components are brought into the firing zone with the fuel, then it is assured that the fine material will enter the zone of highest temperature and thus will be subjected to an intensive heat treatment, which makes possible the completion of the firing or sintering operation in a fraction of a second.
  • the invention then has for its object to provide an improved embodiment of the apparatus hereinbefore described which retains its advantages and which de fines still more exactly the motion and therefore the heat treatment of the fine material in the firing zone.
  • this object is achieved in that the flow of the mixture of fine material and combustion air into the firing or sintering zone is substantially coaxial with the flow of the fuel into the zone.
  • the drawing is a diagrammatic elevation of an apparatus embodying the invention.
  • the illustrated apparatus comprises for example a two-stage preheater l, a substantially horizontally arranged firing apparatus 2 below the preheater, and a cooler 3 which may likewise consist of two stages.
  • the preheater 1 is composed of two cyclone separators 4- and 5 arranged one above the other, wherein the exhaust gas duct 6 of the cyclone separator 5 is connected to the inlet opening of the cyclone separator 4, and the material discharge duct 7 of the cyclone separator 4 is connected to the gas inlet duct 8 of the cyclone separa tor 5.
  • the material outlet of the cyclone separator 5 is connected to a mixing duct 11, into which discharges also a duct 12 ending in a nozzle 1l2a, which comes from the cooler 3 and supplies preheated combustion air.
  • the mixing duct ll extends into a firing chamber 13 and is surrounded by a casing 14 which is connected to a fuel supply duct 15 and discharges through an annular nozzle 16.
  • the flow of the mixture of fine material with combustion air is substantially coaxial with the flow of the fuel into the firing or sintering zone, since in the illustrated embodiment the inlet (mixing duct 11) for the mixture of fine material and combustion air is arranged concentrically with the inlet for the fuel (casing 14 with annular nozzle 16).
  • the firing or sintering chamber 13 is composed of a tube which is provided at one end with the hereinbefore described inlets for the fuel and the mixture of fine material and combustion air, and at the other end leads into a fine material separator 17 which is in the form of a cyclone separator.
  • the clip pipe 17a of this cyclone separator is connected to the duct 8, while the material discharge duct i8 leads into a duct 19 which connects the dip pipe of one cooling cyclone separator 20 with the gas inlet of the other cooling cyclone separator 21.
  • the dip pipe of this cooling cyclone separator 2i. is connected to the hereinbefore described duct 12, while the material discharge duct 22 of this cyclone separator 21 discharges into the fresh air duct 23 which leads to the cyclone separator 20.
  • the fine material which is to be fired 0r sintered is preheated in the two-stage preheater l by means of the exhaust gases from the firing or sintering zone which flow through the duct 8.
  • the supply of the material thus enters the duct 6 (arrow 24); after separation in the cyclone separator 4, the fine material (arrow 25) travels into the cyclone separator 5, from which it is supplied through the duct 9 to the mixing duct 11. There it is intimately mixed with the combustion air which is being discharged at high velocity from the nozzle 12a, and which constitutes the exhaust from the cooler 3 (arrow 26).
  • the mixture of fine material and combustion air comes into contact with the fuel (arrow 27) in the vicinity of the annular nozzle 26.
  • the fine material therefore must travel through the flame zone 28, which is indicated by a dashed line, before it enters the separator 17.
  • the fine material and the flaming gases flow through the tubular firing or sintering chamber substantially in concurrent flow.
  • the fine material (arrow 29) travels into the cooler 3, in which it is cooled in two stages by means of the fresh air (arrow 30).
  • Apparatus for firing or sintering fine material comprising a tubular firing or sintering chamber having an inlet end, and having its opposite end connected to a fine material separator, an air preheater, a fine material preheater, a premixing chamber and means for introducing material from the fine material preheater and air from the air preheater into the premixing chamber, wherein the improvement comprises a feed nozzle leading from the premixing chamber into the inlet end of the tubular chamber, and an annular burner nozzle which is connected to a fuel supply and is coaxial with and surrounds the feed nozzle to cause the fine material from the feed nozzle to enter coaxially the flame produced by the burner nozzle 2.
  • Apparatus according to claim 1 wherein the nozzles for introducing fuel, fine material and air into the firing or sintering chamber discharge into the chamber in a substantially horizontal direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
US00178901A 1970-12-16 1971-09-09 Apparatus for firing or sintering fine material Expired - Lifetime US3744962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2061980A DE2061980C3 (de) 1970-12-16 1970-12-16 Anlage zum Brennen und/oder Sintern von Feingut

Publications (1)

Publication Number Publication Date
US3744962A true US3744962A (en) 1973-07-10

Family

ID=5791197

Family Applications (1)

Application Number Title Priority Date Filing Date
US00178901A Expired - Lifetime US3744962A (en) 1970-12-16 1971-09-09 Apparatus for firing or sintering fine material

Country Status (5)

Country Link
US (1) US3744962A (pt)
JP (1) JPS5210103B1 (pt)
BR (1) BR7107495D0 (pt)
DE (1) DE2061980C3 (pt)
FR (1) FR2119933B2 (pt)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864075A (en) * 1973-04-30 1975-02-04 Smidth & Co As F L Apparatus for burning granular or pulverous material
US3915692A (en) * 1972-10-28 1975-10-28 Metallgesellschaft Ag Pyrometallurgical process for the treatment of solids, preferably metallurgical raw materials or intermediates
US3932117A (en) * 1973-10-10 1976-01-13 Polysius Ag Method of burning or sintering fine-grain material
US3973980A (en) * 1972-12-19 1976-08-10 Rudolf Rohrbach Process for the heat treatment of material in dust form

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5227401U (pt) * 1975-08-14 1977-02-25
YU247476A (en) * 1975-11-10 1982-05-31 Krupp Polysius Ag Device for burning or sintering a fine granular material
JPS5277874U (pt) * 1975-12-09 1977-06-10
DE2629082C2 (de) * 1976-06-29 1985-09-05 Krupp Polysius Ag, 4720 Beckum Verfahren und Vorrichtung zur Wärmebehandlung von Feingut
DE3036957A1 (de) * 1980-09-30 1982-04-08 Gosudarstvennyj Vsesojuznyj institut po proektirovaniju i naučno-issledovatel'skim rabotam Južgiprocement, Char'kov Verfahren zur herstellung von zementklinker und vorrichtung zu dessen durchfuehrung
EP0052431B1 (en) * 1980-11-17 1984-06-13 F.L. Smidth & Co. A/S Cement burning plant
FR2543280B1 (fr) * 1983-03-23 1987-12-04 Gaz De France Procede et installation de traitement par voie thermique de produits divises
JPS61193066U (pt) * 1985-05-23 1986-12-01

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689973A (en) * 1951-11-28 1954-09-28 Janette B Pawel Method and apparatus for contacting solids with gases
US3603568A (en) * 1968-11-06 1971-09-07 Polysius Ag Apparatus for heat treatment of fine material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689973A (en) * 1951-11-28 1954-09-28 Janette B Pawel Method and apparatus for contacting solids with gases
US3603568A (en) * 1968-11-06 1971-09-07 Polysius Ag Apparatus for heat treatment of fine material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915692A (en) * 1972-10-28 1975-10-28 Metallgesellschaft Ag Pyrometallurgical process for the treatment of solids, preferably metallurgical raw materials or intermediates
US3973980A (en) * 1972-12-19 1976-08-10 Rudolf Rohrbach Process for the heat treatment of material in dust form
US3864075A (en) * 1973-04-30 1975-02-04 Smidth & Co As F L Apparatus for burning granular or pulverous material
US3932117A (en) * 1973-10-10 1976-01-13 Polysius Ag Method of burning or sintering fine-grain material

Also Published As

Publication number Publication date
FR2119933B2 (pt) 1973-06-08
DE2061980B2 (de) 1975-03-27
DE2061980C3 (de) 1975-11-13
BR7107495D0 (pt) 1973-03-13
FR2119933A2 (pt) 1972-08-11
DE2061980A1 (de) 1972-07-06
JPS5210103B1 (pt) 1977-03-22

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