US3889393A - Device for thermically treating granular and/or lumpy materials - Google Patents

Device for thermically treating granular and/or lumpy materials Download PDF

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Publication number
US3889393A
US3889393A US453058A US45305874A US3889393A US 3889393 A US3889393 A US 3889393A US 453058 A US453058 A US 453058A US 45305874 A US45305874 A US 45305874A US 3889393 A US3889393 A US 3889393A
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United States
Prior art keywords
chamber
hood
gas discharge
opening
channel
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Expired - Lifetime
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US453058A
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English (en)
Inventor
Hans Peter Thomas
Heinrich Buchner
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/10—Preheating, burning calcining or cooling
    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges

Definitions

  • a device for treating granular and/or lumpy materials by passing a gaseous medium therethrough characterized by a chamber having at least one material discharge opening at a lower end and a material supply device having at least one member having a circular cross section coacting with a flanged opening of the chamber to form a pair of coaxially extending supply channels with the innermost channel being provided with a hood having a plurality of discharge pipes connected to a separate gas discharge and the outer channel being connected to a separate gas discharge conduit.
  • the outer channel is provided with an annular hood which is in communication with the other discharge channel by a plurality of discharge pipes.
  • Either one of the two hoods may be provided with an adjustable member to enable varying the heighth of the hood.
  • the material supply device preferably has a single inlet or feed pipe which is coaxially aligned with an opening in the first member which opening is provided with a conicalshaped closure member to regulate the introduction of material into the inner supply channel.
  • the present invention is directed to a device for the thermic treatment of granular and/or lumpy materials particularly calcite, limestone, dolomite or magnesite by means of either a hot or cold gaseous medium which enters a chamber and passes through the material being added to the chamber.
  • a chutepreheater for granular and lumpy materials is disclosed.
  • material is guided downwardly into a chute consisting of two chambers and is preheated by hot furnace exhaust gases which are flowing in the opposite direction.
  • a central gas conduit is arranged in the chute which conduit is provided with outlet openings in the area of the chamber; however, the structure of this device does not enable a uniform guidance of the individual gas currents through the material and thus does not enable a uniform thermic treatment of the materials passing through the device.
  • a material charging means for a chamber is divided into at least two material supply channels with each supply channel being attached to a separate gas discharge conduit.
  • the provision of the two material supply channels enables separately charging of at least two different classes or sizes of granular and/or lumpy materials. Since each of the material supply channels is provided with separate gas discharge conduits, the flow of the gaseous medium through the material in each of the channels can be controlled to obtain a sufficient quantity of gas acting on the material in each channel and thereby obtain an optimum distribution of the quantities of gas for the individual classes of grain size of the material in the chamber.
  • the provision of at least two separately arranged material supply channels also enable a uniform distribution of the material being charged into the chamber without requiring special distributing devices.
  • the present invention is directed to an apparatus having at least two coaxial or concentric supply channels each of which is connected to a separate gas discharge conduit and which device has an improved feed of the material being treated into the material supply channels and improved gas conduction Within the various material supply channels.
  • the innermost channel is provided with means in the form of a hood or dome for collecting gas which insures an advantageous circumferential distribution of the charging material, a uniform contact of the material by the gases and thus a more intensified contact between the gases and the material located in the innermost chamber.
  • the device of the present invention comprises a chamber having an upper end with a flanged opening and a lower end with at least one discharge opening, said chamber having at least one wall extending between said ends with at least one opening in the wall for admitting a gaseous medium into the chamber, means mounted on the upper end of the chamber and aligned with the flanged opening for supplying material to the chamber and for removing gaseous medium therefrom, said means for supplying material including at least two exhaust discharge conduits disposed in the upper portion thereof, first means for coacting with the flanged opening to provide at least two coaxially extending material supply collection which project into the chamber to different depths, a collecting hood disposed in the innermost coaxially extending supply channel, said hood being provided with a plurality of gas exhaust pipes communicating with one of the separate gas discharge conduits, and second means connecting the remaining supply channels to the other of the gas discharge conduits.
  • the outer supply channel is preferably provided with an annular gas collection hood or dome which is connected through a plurality of exhaust pipes to the other of the separate gas discharge conduits.
  • a lower wall portion of either one of the gas collection hoods may be provided with an adjustable member so the height or length of the hood can be varied or adjusted.
  • FIGURE is a cross-sectional view of a device according to the present invention.
  • An illustrative embodiment of the device incorporating the principles of the invention is a preheating device having a vertically arranged chamber 1.
  • An upper end or surface of the chamber 1 is provided with an inwardly extending depression or flange 21 which terminates in a flanged opening 22 having an outwardly extending flange.
  • the lower portion of the chamber 1 converges to a plurality of discharge openings 23 which may be provided with appropriate means for controlling discharge of material from the chamber 1.
  • the wall 1' of the chamber 1 adjacent to the upper surface is provided with at least one opening such as an opening 2 which is connected to a gas conduit for introducing a hot gaseous medium (indicated by arrows 2) to the interior of the chamber.
  • a supply chute or device 3 which acts as means for supplying material to the chamber and for removing the gaseous medium therefrom, is mounted on the upper surface of the chamber 1 and aligned with the flanged opening 22.
  • the device 3 includes a first member 24 which acts as means for coacting with the flanged opening 22 to form a pair of material supply channels 4 and 5, which are coaxial to one another.
  • the outermost channel 4 is concentric with the innermost channel 5.
  • the member 24 as illustrated has a circular cross section and is composed of three truncated cone portions with the uppermost end portion converging to an opening 13' which receives a conical-shaped closure member 13.
  • the device 3 includes a conicallyshaped second member 25 which isv concentrically spaced from the upper end portion of the member 24.
  • the member 25 coacts with a partition 26 to provide a pair of separate annular chambers which are in communication with separate gas discharge conduits 6 and 7, respectively.
  • a gas collection hood or dome 8 is concentrically arranged in the inner material supply channel 5, a gas collection hood or dome 8 is concentrically arranged.
  • the hood or dome 8 has upper conical part and a lower cylindrical part or portion.
  • the conical part has a plurality of circumferentially spaced apertures which are in communication with a corresponding number of circumferentially spaced first gas discharge pipes 9 which extend through circumferentially spaced openings in the upper conical portion of member 24 and through openings in the conical member 25 to communicate with the annular chamber of the gas discharge conduit 7.
  • the member 24 is preferably provided with an annular extension to form an annular-shaped collection hood 10 for the outer or annular supply channel 4.
  • the annular hood 10 which has a cylindrical portion or skirt, has a plurality of circumferentially spaced openings which are in communication with a plurality of second gas discharge pipes 11 which extend through apertures in the member 25 to communicate the annular hood 10 with the annular chamber of the discharge conduit 6.
  • the pipes 9 are connected such as by welded joints to the hood 8 and members 24 and 25 and the pipes 11 are connected such as by welded joints to the hood 10 and member 25 so that the pipes 9 and 11 support the hoods 10 and the member 24 in the coaxial position within the device 3 and pipes 9 also support the hood 8 coaxially within the supply channel 5.
  • the hood 8 is provided with a cylindrical member or ring 12 which is adjustably received in the cylindrical portion of the hood.
  • the hood 10 also has a cylindrical portion or skirt which can be provided with an adjustable ring or cylindrical member similar to 12 to enable varying the height or length of the hood.
  • the device 3 has a material supply or feed pipe 18 which is preferably axially aligned with the opening 13 of the member 24.
  • a pair of conveyor belts l4 and 15 each extending to respective hoppersor bunkers 16 and 17 are positioned above the pipe 18.
  • the conical closure member 13 is moved to a lower position to open the opening 13'.
  • the conveyor belt 14 which refall in the space between the member 25 and the upper conical portion of the member 24.
  • the outer supply channel 4 is full of fine material while the inner channel 5 is full of coarse material.
  • each channel such as directly beneath the hood 8 in channel 5 and directly beneath hood 10 in channel 4 is free of the material. Due to the coaction between the flanged opening 22 and member 24, an annular portion or chamber 27 in the chamber 1 is free of material. The portion 27 is in communication with the opening 2 and communicates the gaseous medium around the chamber l to enter the pile and pass through the material in the material supply channels 4 and 5 as indicated by the arrows 6 and 7' to reach the respective hoods 10 and 8. Since the discharge conduit 7 has a throttle valve or plate 19 and the conduit 6 has a throttle plate or valve 20, the rate of flow in each channel 4 and 5 can be regulated to insure the desired contact of the gaseous medium and the material being treated.
  • each channel As the material in each channel is treated by the flow of gases, it gradually moves downward in each channel toward the discharge opening 23 and is gradually removed therethrough by conventional means (not illustrated) for subsequent treatment such as in a rotary kiln.
  • conventional means not illustrated
  • the amount of material in each channel can be controlled.
  • One method of controlling the amount of material in each of the channels 4 and 5 is to incorporate means for measuring the amount of material in each channel. The output of the measuring means may be used to control the operation of each of the belts l4 and 15 and the discharge from their respective hoppers 16 and 17 along with the reciprocation of the closure member 13 and thus control the addition of fresh material to each channel.
  • the member 13 when the level or amount of material in channel 5 drops below a given value, the member 13 is shifted to an open position and the belt 14 is operated to introduce material from hopper 16 through the pipe 18 and opening 13' into the channel 5.
  • the member 13 When additional fresh material is required in the outer channel 4, the member 13 is moved to close opening 13' and belt 15 is operated to transfer material from hopper 17 to feed pipe 18 to fill the outer chamber 4.
  • the conduit connected to the opening 2 may be directly connected to a furnace to provide hot furnace exhaust gases in the annular chamber 27.
  • the hot gases may be produced by placing burners in openings provided on an upper wall portion of the chamber 1 so that combustion occurs in the space of annular chamber 27. The gases introduced into the chamber 27 penetrate the inclined material and flow through the channel as illustrated by the arrows.
  • the incline surface of the pile adjacent the annular chamber 27 5 contains mainly fine material with the coarse material being concentrated within the member 24. A portion of the gaseous medium will flow in fine materials in the channel 4 to the hood l0 and the remaining portion flows through the outer layer of fine material into the coarse material of channel 5 and to the hood 8. Due to the arrangement of the gas collection hoods or domes 8 and 10 in the respective channels 4 and 5 in accordance with the present invention, a uniform distribution of material in the channels is obtained and thus the thermic treatment of the granular or lumpy material is intensified.
  • the influence of the hood 8 on both the flow of gases and the distribution of material in the inner channel 5 can be varied.
  • the hood 10 is provided with an adjustable member or ring 12, the influence of the hood 10 on both the distribution of material and the flow of gases in channel 4 may also be varied in a similar manner.
  • the description of the operation of the device was given for the device being utilized for preheating materials. It is within the scope of the invention to use the present device as a cooler for bulk material.
  • the conduit connected to the opening 2 is connected to a source of cooling air which will circulate through the various materials in the channels 4 and 5 to cool these materials.
  • a device for thermically treating a granular and lumpy material such as calcite, limestone, dolomite and magnesite by passing a gaseous medium therethrough comprising in combination a chamber having an upper end with a flanged opening and a lower end with at least one discharge opening, said chamber having at least one wall extending between said ends with at least one opening in the wall for admitting a gaseous medium into the chamber; and means mounted on the upper end of the chamber and aligned with the flanged opening for supplying material to the chamber and for removing the gaseous medium therefrom, said means for supplying material including at least two separate gas discharge conduits disposed in an upper portion thereof, first means for coacting with the flanged opening of the chamber to provide at least two coaxially extending material supply channels which project into the chamber to different depths, and a collection hood disposed in the innermost coaxially extending supply channel, said hood being provided with a plurality of first gas exhaust pipes communicating with one of the separate gas
  • a device wherein a lower wall portion of the collection hood is provided with an adjustable member so that the height of the hood is adjustable.
  • said means for supplying material further includes an annularshaped collection hood disposed in the outer material supply channel, and wherein the second means includes a plurality of second gas exhaust pipes communicating the annular hood to the other separate gas discharge conduit.
  • a device wherein a lower wall portion of one of the collection hoods is provided with an adjustable member so that the height of the hood is adjustable.
  • the means for supplying includes a single feed pipe in communication with each of the supply channels and wherein the innermost supply channel is supplied with a conical closure means for regulating flow of material thereto.
  • the first means comprises a first member having a circular cross section, said first member converges at an upper end to a coaxial opening and forms an inner supply channel and a concentric outer supply channel, wherein the supply means has two separate gas discharge conduits, a single feed pipe coaxially disposed above said coaxial opening, and a conically-shaped second member coaxially disposed to said feed pipe and concentrically spaced from the upper end of said first member, said second member coacting with a partition to provide an annular chamber for each of the two separate gas discharge conduits, said plurality of first pipes extending through said first and second members to communicate with the annular chamber of said one separate gas discharge conduit and wherein the second means communicates the outer channel with the annular chamber of the other of the two separate gas discharge conduits.
  • the means for supplying includes a conical closure means disposed in the coaxial opening of the first member to regulate flow of material from the feed pipe therethrough.
  • a device wherein the first member has an annular hood disposed on a surface thereof extending outward into the outer supply channel and wherein said second means comprises a plurality of second gas exhaust pipes communicating the annular hood to the annular chamber of said other of said two separate gas discharge conduits.
  • a device wherein at least one of said hoods is provided with an adjustable member so that the height of the hood is adjustable.
  • a device wherein the plurality of gas discharge pipes communicating each of the respective hoods with an annular chamber are circumferentially spaced about each of their respective hoods and circumferentially spaced in the space disposed between the first and second members.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
US453058A 1973-04-05 1974-03-20 Device for thermically treating granular and/or lumpy materials Expired - Lifetime US3889393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2317056A DE2317056C3 (de) 1973-04-05 1973-04-05 Vorrichtung zur thermischen Behandlung von körnigen und/oder stückigen Materialien

Publications (1)

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US3889393A true US3889393A (en) 1975-06-17

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US453058A Expired - Lifetime US3889393A (en) 1973-04-05 1974-03-20 Device for thermically treating granular and/or lumpy materials

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US (1) US3889393A (enrdf_load_stackoverflow)
JP (1) JPS508776A (enrdf_load_stackoverflow)
AT (1) AT337590B (enrdf_load_stackoverflow)
BE (1) BE813313R (enrdf_load_stackoverflow)
BR (1) BR7402690D0 (enrdf_load_stackoverflow)
CA (1) CA1031159A (enrdf_load_stackoverflow)
DD (1) DD113619A6 (enrdf_load_stackoverflow)
DE (1) DE2317056C3 (enrdf_load_stackoverflow)
ES (1) ES424824A2 (enrdf_load_stackoverflow)
FR (1) FR2224722B2 (enrdf_load_stackoverflow)
GB (1) GB1471207A (enrdf_load_stackoverflow)
IT (1) IT1205879B (enrdf_load_stackoverflow)
PL (1) PL90418B3 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254221A (en) * 1978-06-15 1981-03-03 Karl Beckenbach Method of burning lump-sized combustible material, and an annular shaft kiln for carrying out this method
US4494930A (en) * 1980-11-28 1985-01-22 Khimiko-Metallurgichesky Institut Shaft furnace for heat treatment of finely dispersed materials
US4948364A (en) * 1986-06-10 1990-08-14 Thompson Jeffery L Lime kilns
US6139313A (en) * 1996-07-23 2000-10-31 Mortimer Technology Holdings Limited Furnace having toroidal fluid flow heating zone
US20040099658A1 (en) * 2001-07-18 2004-05-27 Norbert Patzelt Shaft pre-heater
US20160305710A1 (en) * 2013-11-25 2016-10-20 Binder+ Co Ag Device and method for producing an expanded granular material
EP3789714A1 (de) * 2019-09-06 2021-03-10 Martin Hübner Diffusor-leit-konstruktion für schüttgutbehälter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722719C2 (de) * 1977-05-20 1982-05-06 Rheinische Kalksteinwerke GmbH, 5603 Wülfrath Kalkschachtofen
DE2748670C2 (de) * 1977-10-29 1986-07-31 BKMI Industrieanlagen GmbH, 8000 München Verfahren und Vorrichtung zum Brennen von Materialien sehr unterschiedlicher Korngröße, insbesondere Kalksteinschotter

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1291019A (en) * 1919-01-14 Julian Kennedy Charging apparatus for blast-furnaces.
US2306811A (en) * 1941-08-04 1942-12-29 Nat Tube Co Method of charging blast furnaces
US2412057A (en) * 1944-03-06 1946-12-03 Charles W Nichols Jr Furnace construction
US2533142A (en) * 1945-07-19 1950-12-05 Pickands Mather & Co Heat-treating solids
US2597585A (en) * 1949-07-01 1952-05-20 George E Howard Glass melting method and apparatus
US3145094A (en) * 1959-09-12 1964-08-18 Nakajima Toitsu Process and apparatus for making steel from powdered iron ore
US3284072A (en) * 1963-02-16 1966-11-08 Fellner & Ziegler Gmbh Preheaters for revolving tubular kilns
US3706387A (en) * 1972-01-17 1972-12-19 Mohr & Sons John Blast furnace charging apparatus for high top pressure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1291019A (en) * 1919-01-14 Julian Kennedy Charging apparatus for blast-furnaces.
US2306811A (en) * 1941-08-04 1942-12-29 Nat Tube Co Method of charging blast furnaces
US2412057A (en) * 1944-03-06 1946-12-03 Charles W Nichols Jr Furnace construction
US2533142A (en) * 1945-07-19 1950-12-05 Pickands Mather & Co Heat-treating solids
US2597585A (en) * 1949-07-01 1952-05-20 George E Howard Glass melting method and apparatus
US3145094A (en) * 1959-09-12 1964-08-18 Nakajima Toitsu Process and apparatus for making steel from powdered iron ore
US3284072A (en) * 1963-02-16 1966-11-08 Fellner & Ziegler Gmbh Preheaters for revolving tubular kilns
US3706387A (en) * 1972-01-17 1972-12-19 Mohr & Sons John Blast furnace charging apparatus for high top pressure

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254221A (en) * 1978-06-15 1981-03-03 Karl Beckenbach Method of burning lump-sized combustible material, and an annular shaft kiln for carrying out this method
US4494930A (en) * 1980-11-28 1985-01-22 Khimiko-Metallurgichesky Institut Shaft furnace for heat treatment of finely dispersed materials
US4948364A (en) * 1986-06-10 1990-08-14 Thompson Jeffery L Lime kilns
US6139313A (en) * 1996-07-23 2000-10-31 Mortimer Technology Holdings Limited Furnace having toroidal fluid flow heating zone
US20040099658A1 (en) * 2001-07-18 2004-05-27 Norbert Patzelt Shaft pre-heater
US6918760B2 (en) * 2001-07-18 2005-07-19 Polysius Ag Shaft pre-heater
US20160305710A1 (en) * 2013-11-25 2016-10-20 Binder+ Co Ag Device and method for producing an expanded granular material
CN106415177A (zh) * 2013-11-25 2017-02-15 宾德股份公司 用于制造膨胀颗粒的设备和方法
US10174998B2 (en) * 2013-11-25 2019-01-08 Binder + Co Ag Device and method for producing an expanded granular material
CN106415177B (zh) * 2013-11-25 2020-03-03 宾德股份公司 用于制造膨胀颗粒的设备和方法
EP3789714A1 (de) * 2019-09-06 2021-03-10 Martin Hübner Diffusor-leit-konstruktion für schüttgutbehälter
EP3789716A1 (de) * 2019-09-06 2021-03-10 Martin Hübner Diffusor-leit-konstruktion für schüttgutbehälter

Also Published As

Publication number Publication date
ATA280374A (de) 1976-10-15
DD113619A6 (enrdf_load_stackoverflow) 1975-06-12
BE813313R (fr) 1974-07-31
PL90418B3 (enrdf_load_stackoverflow) 1977-01-31
CA1031159A (en) 1978-05-16
GB1471207A (en) 1977-04-21
FR2224722A2 (enrdf_load_stackoverflow) 1974-10-31
DE2317056C3 (de) 1975-10-09
DE2317056A1 (de) 1974-10-17
IT1205879B (it) 1989-03-31
DE2317056B2 (de) 1975-02-13
AU6711874A (en) 1975-09-25
ES424824A2 (es) 1976-11-16
JPS508776A (enrdf_load_stackoverflow) 1975-01-29
AT337590B (de) 1977-07-11
FR2224722B2 (enrdf_load_stackoverflow) 1977-10-21
BR7402690D0 (pt) 1974-11-19

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