US3920380A - Method and furnace for heat treating material - Google Patents

Method and furnace for heat treating material Download PDF

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Publication number
US3920380A
US3920380A US532632A US53263274A US3920380A US 3920380 A US3920380 A US 3920380A US 532632 A US532632 A US 532632A US 53263274 A US53263274 A US 53263274A US 3920380 A US3920380 A US 3920380A
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United States
Prior art keywords
chamber
gases
preconditioning
gas
cooler
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Expired - Lifetime
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US532632A
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English (en)
Inventor
Glenn A Heian
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.)
Allis Chalmers Corp
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Allis Chalmers Corp
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
Priority to US532632A priority Critical patent/US3920380A/en
Application filed by Allis Chalmers Corp filed Critical Allis Chalmers Corp
Priority to CA233,250A priority patent/CA1051658A/fr
Priority to GB42983/75A priority patent/GB1506589A/en
Publication of US3920380A publication Critical patent/US3920380A/en
Application granted granted Critical
Priority to AU86982/75A priority patent/AU485559B2/en
Priority to MX162251A priority patent/MX146084A/es
Priority to BR7508070*A priority patent/BR7508070A/pt
Priority to JP50145869A priority patent/JPS5184820A/ja
Priority to FR7538146A priority patent/FR2294415A1/fr
Priority to DE19752556046 priority patent/DE2556046A1/de
Anticipated expiration legal-status Critical
Assigned to FIRST BANK NATIONAL ASSOCIATION reassignment FIRST BANK NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CIMCORP PRECISION SYSTEMS INC.
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • 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
    • 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 specially adapted for rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2066—Arrangements of preheating devices for the charge comprising a band transporter
    • 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 specially adapted for rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F27B7/383—Cooling devices for the charge

Definitions

  • ABSTRACT Exhaust gas from the cooler is pulled through a mechanical dust collector by a cooler recoup fan and de- I NOV. 18, 1975 livered as tempering air to a mixing box in which moisture is added to moisturize and also temper the hot bypass gases.
  • Pat No. 3.653.645 are mixed with either cooler exhaust air and tempering water or a combination of cooler exhaust air and tempering water and atmospheric air.
  • Excess cooler exhaust gases not utilized in the mixing box are directed to the windbox of the furnace preconditioning chamber on the suction side of the grate to raise the exhaust gas temperature from the grate above acid dew point which reduces corrosion problems.
  • the exhaust gases having a controlled moisture content are cleaned in an electrostatic precipitator and exhausted through a stack. Utilizing the recouped cooler gases as a tempering medium for the gases from the preheat chamber of the furnace eliminates the need for a cooler electrostatic precipitator or gas permeable bags, lowers fuel consumption at the required higher grate waste gas temperature, lowers total system waste gas volume with properly moisturized waste gas providing better electrostaitc precipitator performance and maintains the waste gas temperature above acid dew point.
  • an object of the present invention to provide an improved method and apparatus for utilizing the waste gases of the cooler as tempering air in lieu of ambient outside air and moisturizing the bypass gases and utilizing such gases in the preconditioning chamber ofa furnace to effect a considerable reduction in system fuel consumption at a higher grate waste gas temperature.
  • Yet another object of the present invention is to provide an improved method and apparatus for utilizing recouped gases and moisturized bypass gases at the suction side of the preconditioning chamber to effect both temperature and moisture control of the gas directed to the exhaust precipitator and stack.
  • Still another object of the present invention is to provide an improved method and apparatus for utilizing excess waste gases of the cooler at the suction side of the preconditioning chamber to effect temperature control of the gases directed to the exhaust electrostatic precipitator and stack.
  • a further object of the present invention is to provide an improved method and apparatus for heat treating materials in which a cooler electrostatic precipitator or gas permeable bag is eliminated.
  • a still further object of the present invention is to provide an improved method and apparatus for keeping waste gas temperature above acid dew point to reduce the effects of corrosion.
  • a tempering air damper controls the temperature of the bypass gases while the cooler recoup excess air duct damper controls the duct pressure to the bypass mixing box. Moisture is added to the bypass gases in the mixing box to provide a controlled moisture content.
  • the moisturized gases from the mixing box are delivered at the desired temperature or a higher temperature to the hot end of the preconditioning chamber or to a temperature averaging box where they are tempered by the offgas from the preheat chamber so that the tempcrature of the mixture of gases delivered to the preconditioning chamber is at the desired controlled temperature.
  • Some of the bypass gas from the preheat chamber is delivered to the suction side of the preconditioning chamber windbox where it is mixed with the off-gases of the preconditioning chamber. This gas mixture is blended with the higher temperature excess cooler exhaust gases prior to delivery to an electrostatic precipitator and stack at a temperature above acid dew point and having a predetermined moisture content by volume.
  • FIGURE is a diagrammatical view in side elevation, partly in section, of an apparatus for performing a process according to the present invention.
  • raw material is prepared for the apparatus to be described, by a suitable agglomerating device which may be as shown; for example, a balling or pelletizing pan 10 or a drum.
  • a feeder ll deposits the green (i.e., untreated) pellets of raw materials on a gas pervious traveling grate l2.
  • a housing structure 14 is arranged to enclose a space over the grate l2 and define a material inlet opening 16.
  • a baffle wall 17 is suspended from the roof of housing 14 to a predetermined distance above grate 12 and operates to divide the space enclosed by housing 14 into a preconditioning or drying chamber 18 and a preheat or preburn chamber 19. Green pellets on grate 12 will be transported through the drying chamber 18, then the preburn chamber I9, and then discharged down a chute 21 into an inlet opening 22 of a refractory lined rotary kiln 25.
  • Rotary kiln 25 slopes downwardly from chute 21 toward a hood 26 that encloses the discharge end of the kiln 25 and defines a passage 27 from kiln 25 to a cooler 30.
  • the downward slope of the rotary kiln 25 causes material received from chute 21 to pass through kiln 25, then into hood 26 and through passage 27 to the cooler 30, which may be a device as shown in U.S. Pat. No. 2,256,0l7 of 1941, divided into stages as will be described.
  • the cooler 30 is provided with blowers 31, 32, 33, 34, 35 and 36 which may be driven by variable speed driving motors (not shown) that blow controlled quantities of air upwardly through windhoxes 37, 38 and then through material on an air pervious grate 39.
  • a baffle 41 may be provided to divide cooler 30 into a first stage or primary cooling chamber 42 and a second stage or final cooling chamber 43 over grate 39. Cool air supplied by blowers 31, 32 and 33 is blown upwardly through windbox 37, grate 39, chamber 42, and passage 27 into the firing hood 26.
  • a burner 44 is mounted on and projects into the interior of hood 26 to deliver and burn fuel that raises the temperature of gases passing into kiln to the desired high temperature level required for material receiving heat treatment in the kiln.
  • Gas flov. input from the discharge end of kiln 25 and up chute 21 and into the material preheat chamber 19 will he in a temperature range of l .8002.5()O Fahrenheit
  • the waste gas from the cooler is recouped and utilized in the drying or preconditioning chamber 18.
  • the cooler gases in the upper portion of the final cooling chamber 43 is drawn into an exhaust duct 46 leading to a mechanical dust collector 47.
  • the cool gases are drawn from the mechanical dust collector 47 by a cooler recoup fan 48.
  • the recouped gases are passed by fan 48 into a duct 49 and thence into a ported cage mixing box 50 and utilized as tempering gases therein.
  • Mixing box 50 communicates with the upper interior portion of the preheating section 19 so that a portion of the hot gases flowing from the upper end of the kiln 25 are drawn into the mixing box 50.
  • the other portion of the gases from the kiln which does not pass into the mixing box is mixed with auxiliary heat from a burner 60, and the mixture passes through the material on the grate 12.
  • the gases drawn into the mixing box 50 are at a temperature in the range of 2.200" Fahrenheit. The 2,200 Fahrenheit temperature of these gases is much too hot to utilize in drying section 18.
  • the cooler gases from the final cooling section 43 are mixed with the bypassed portion of gases from the kiln 25 in the mixing box 50.
  • the recouped mixed gases are also moisturized in the mixing box 50 by means of sprays 51 that are a part of a water system 52. Pressure in tempering air duct to the mixing box 50 is maintained constant by means of a motorized damper 53 in an excess recoup gas duct 54. A damper 55 in the duct 49 regulates the quantity of the tempered air that is passed into the mixing box 50.
  • the opposite end of the excess recoup gas duct 54 is in communication with the suction or negative pressure side of the preconditioning or drying section 18, mixing box 50 of the furnace, and a portion of the gases obtained from the cooler chamber 43 is utilized therein as will be subsequently described. Thus, excess recouped gases are bypassed into the duct 54 and directed to the suction or negative pressure windbox 56 of the preconditioning chamber 18.
  • the tempered and moisturized gas in the mixing box 50 is directed to an inlet or inlet manifold 61 which communicates with the preconditioning chamber 18 via a duct 62.
  • a duct 63 operates to connect the mixing box 50 with a mechanical collector 64 where the dust is collected.
  • the tempered gas is drawn through a duct 66 by a fan 67.
  • a duct 68 connects the fan 67 to the manifold 61.
  • the total volume of the bypass gas from the mixing box 50 to the fan 67 is controlled by a damper 69 located in the duct 66.
  • the off-gas in the lower portion of the preheating chamber at substantially 600 Fahrenheit are drawn off into a connecting duct 72.
  • the alkali laden gases are passed through a mechanical collector 73. From the collector 73 a fan 74 forces the gases via a connecting duct 76 into the manifold 61 associated with the preconditioning chamber 18.
  • the gases in the negative pressure windbox 56 side of the chamber 18 are waste gases which are disposed of to a stack 77 via a duct 78 connected to the windbox 56 and a fan 79 which blows the waste gases through a connected electrostatic precipitator 81.
  • the temperature of the gases to the stack must be controlled. This is necessary because of the electrostatic precipitntor 81 or gas permeable bags utilized at the stack.
  • a damper 83 in duct 82 operates to establish the ratio of the gases passed to the manifold 61 and thus to the preconditioning chamber 18. Therefore, the temperature of the reclaimed gas utilized for drying the material in the preconditioning chamber 18 can be controlled as desired.
  • the drying gases are maintained at 500 600 Fahrenheit without an excess of system fuel being utilized to effect the complete drying of the green pellets passing through the chamber 18.
  • the temperature in the preheat chamber 19 can be elevated so that the pellets are essentially calcined before entering into the kiln 25.
  • an ambient air duct 91 is connected to the duct 72 and will pass ambient air into the duct 72 when desired. However, in the usual operation. it is not necessary to temper the gases passing from the lower portion 71 of the preheat chamber 19. Thus, a damper 92 in the duct 91 is normally closed to effectively block any substantial flow of ambient air into the duct 72.
  • a mineral furnaeing apparatus having structure defining at least a chamber for preconditioning material having a material inlet opening. a chamber for preheating material. a chamber for final heating material having a material inlet opening adjacent the preheating chamber and having a material outlet opening and at least one cooling chamber having a material inlet opening adjacent the material output opening of the final heating chamber. the chambers being connected together in series flow arrangement to define a material flow stream from the preconditioning chamber to the preheating chamber. to the final heating chamber and thence to cooling chamber with the final heating chamber and the preheating chamber defining a passage for a counterflow of gas from the final heating chamber to the preheating chamber. and gas conveying means connecting said cooling chamber and said preheating chamber to said preconditioning chamber. said gas conveying means comprising:
  • a mixing box connected to the preheating chamber in which gases at a relatively high temperature are produced in position adjacent the material inlet passage of the final heating chamber and on a side of the material stream facing the flow of gas through the passage;
  • a first duct means connected on a first end thereof to said mixing box and connected on a second end thereof to said mixing box and connected on the a second end thereof preconditioning chamber;
  • a preheating chamber windbox operatively disposed below the material stream
  • a second duct means connected on a first end thereof to the preheating chamber windbox and a second end thereof being connected to the precondition ing chamber at a location above the material stream;
  • a third duct means connected on a first end thereof to said mixing box and connected on a second end thereof to the cooling chamber; and.
  • moisturizing means connected to said mixing box to moisturize the gases in said mixing box
  • gases from the preheat chamber are tempered with gases from the cooler chamber and said mixture of tempered gases are moisturized and directed to the preconditioning chamber as preconditioning gases at a controlled temperature for drying material in the preconditioning chamber and for controlling waste gas temperature and moisture content.
  • a mineral furnacing apparatus wherein there is a fourth duct means connected on a first end thereof to said third duct means at a position to bypass some of the cooling chamber gases around said mixing box.
  • said fourth duct means on a second end thereof being connected to the windbox of the preconditioning chamber at a location on the side of the material stream opposite to the flow of the tempered moisturized gas to the material in the preconditioning chamber;
  • a fifth duct means connected on a first end thereof to said first duct means at a location ahead of the com nection of the second end of said first duct means with the preconditioning chamberv said fifth duct means on a second end thereof being conducted to the windbox of the preconditioning chamber on the same side thereof to which said second end of said fourth duct means is connected to the windbox of the preconditioning chamber;
  • vhcrcby nioisturi/cd tempered gases from aid nus ing box is directed to the preconditionmi chamber and mixed with gases from the cooler chamber to temper the temperature of the exhaust gases from the preconditioning chamber to a desired temperature and moisture content.
  • a mineral furnacing apparatus according to claim 2 wherein there is also provided a dust collecting means 6 operably connected to said preconditioning chamber windbox 4.
  • a mineral funacing apparatus including a fan in said third duct means between the cooling chamber and said mixing box for drawing gas out of the cooler chamber and delivering the gas to said mixing box; and,
  • a dust collecting and discharge means in said third duct means between said cooler chamber and said fan operable to collect dust particles larger than It) to 20 microns.
  • a mineral furnacing apparatus wherein there is provided a dampener means in said fourth duct, said dampener means being operable to maintain a'constant pressure in the tempering air duct to the mixing box.
  • a mineral furnacing apparatus wherein said moisturized exhaust gases from said preconditioning chamber are directed into an exhaust duct connected on a first side to said preconditioning chamber windbox in a location below the material flow stream, and connected on a second end thereof to an exhaust stack;
  • a dust precipitator connected in said exhaust duct and operable to collect particles smaller than [0 to 20 microns for removing the particles prior to the gas being directed to stack;
  • moisturized exhaust gases from the preconditioning chamber windbox at a temperature above acid dew point is drawn therefrom and passed to said precipitator for filtering prior to being passed to said stack.
  • a mineral furnacing apparatus according to claim 6 wherein said exhaust duct fan is operable to provide a negative pressure on the order of 2 to [6 inches of water column in the preconditioning chamber windbow at the below the stream of material.
  • the blending of the gases in the windbox of the preconditioning section is controlled to establish the minimum volume of exhaust gas and at a temperature above acid dew point and with a minimum moisture content of 10 percent or higher by volume.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Tunnel Furnaces (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
US532632A 1974-12-13 1974-12-13 Method and furnace for heat treating material Expired - Lifetime US3920380A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US532632A US3920380A (en) 1974-12-13 1974-12-13 Method and furnace for heat treating material
CA233,250A CA1051658A (fr) 1974-12-13 1975-08-11 Methode et four de traitement thermique
GB42983/75A GB1506589A (en) 1974-12-13 1975-10-20 Process of and apparatus for heat-treating material and conditioning waste exhaust gases
AU86982/75A AU485559B2 (en) 1974-12-13 1975-11-26 Improved process ofan apparatus for heat-treating material and conditioning waste exhaust gases
MX162251A MX146084A (es) 1974-12-13 1975-12-01 Mejoras a metodo y aparato para tratar termicamente materiales y acondicionar gases residuales de la produccion de cemento portland
JP50145869A JPS5184820A (en) 1974-12-13 1975-12-05 Zairyonetsushorihoho oyobi shoriro
BR7508070*A BR7508070A (pt) 1974-12-13 1975-12-05 Processo e forno aperfeicoados para o tratamento termico de material e condicionamento de gases de exaustao residuais
FR7538146A FR2294415A1 (fr) 1974-12-13 1975-12-12 Procede et appareil de traitement thermique de matieres et de conditionnement des gaz brules
DE19752556046 DE2556046A1 (de) 1974-12-13 1975-12-12 Verfahren und vorrichtung zur waermebehandlung von material

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US532632A US3920380A (en) 1974-12-13 1974-12-13 Method and furnace for heat treating material

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US3920380A true US3920380A (en) 1975-11-18

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US532632A Expired - Lifetime US3920380A (en) 1974-12-13 1974-12-13 Method and furnace for heat treating material

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US (1) US3920380A (fr)
JP (1) JPS5184820A (fr)
BR (1) BR7508070A (fr)
CA (1) CA1051658A (fr)
DE (1) DE2556046A1 (fr)
FR (1) FR2294415A1 (fr)
GB (1) GB1506589A (fr)
MX (1) MX146084A (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976422A (en) * 1974-03-04 1976-08-24 Przedsiebiorstwo Projektowania I Wyposazania Odlewni "Prodlew" Apparatus for reclamation of resinous moulding mixes
US4047884A (en) * 1976-04-05 1977-09-13 Allis-Chalmers Corporation Means and method for processing cement raw materials containing fuel of high volatile content
US4089697A (en) * 1975-02-26 1978-05-16 The Associated Portland Cement Manufacturers Limited Manufacture of Portland cement
US4120645A (en) * 1975-05-13 1978-10-17 Allis-Chalmers Corporation System for handling high sulfur materials
US4146360A (en) * 1976-10-12 1979-03-27 Italcementi Fabbriche Riunite Cemento S.P.A. Device for controlling the gas temperature in the drying chamber of a moving grate preheater for cement clinker production
DE2818205A1 (de) * 1978-04-26 1979-11-08 Babcock Krauss Maffei Ind Verfahren zum kuehlen von sintergut bei gleichzeitiger verbesserung der abgas- und abluftentstaubung von drehofen und kuehler
US4236887A (en) * 1979-05-21 1980-12-02 Allis-Chalmers Corporation Method and apparatus for handling and utilizing system off-gas in a pyro-processing system
US4334859A (en) * 1978-07-20 1982-06-15 Susumu Minegishi Method and apparatus for melting matrix materials
US4391207A (en) * 1978-07-25 1983-07-05 F. L. Smidth & Co. Method of conditioning exhaust gases from coal firing
US4422846A (en) * 1980-09-17 1983-12-27 Firma Carl Still Gmbh & Co. Kg Method and apparatus for indirectly drying and preheating fine material
US4503783A (en) * 1983-07-11 1985-03-12 General Kinematics Corporation Furnace ash air seal
US4551093A (en) * 1982-09-27 1985-11-05 Carter-Wallace Inc. Production of a solid stick in a container
US4592724A (en) * 1983-06-20 1986-06-03 Krupp Polysius Ag Grate cooler and method of cooling
DE3538059A1 (de) * 1985-10-25 1987-04-30 Krupp Polysius Ag Vorrichtung zum kuehlen von heissem gut
US5090813A (en) * 1990-07-23 1992-02-25 Cedarapids, Inc. Dual drum recycle asphalt drying and mixing method and apparatus
US5174650A (en) * 1990-07-23 1992-12-29 Cedarapids, Inc. Dual drum recycle asphalt drying and mixing method and apparatus
US5769010A (en) * 1996-02-01 1998-06-23 Btu International, Inc. Furnace including localized incineration of effluents
DE19706265A1 (de) * 1997-02-18 1998-08-20 Krupp Polysius Ag Verfahren zum Brennen von basischem Material
US6012918A (en) * 1997-06-02 2000-01-11 Doumet; Joseph E. Method and apparatus for producing cement clinker
CN103925596A (zh) * 2014-05-07 2014-07-16 苏州皇森机电科技有限公司 一种高效能的煤气燃烧器
EP3243957B1 (fr) 2016-05-10 2018-12-12 Ermont Installation et procédé d'enrobage de granulats
CN111595168A (zh) * 2020-06-02 2020-08-28 福建龙净脱硫脱硝工程有限公司 一种链篦机-回转窑脱硝系统及方法
WO2024173994A1 (fr) * 2023-02-24 2024-08-29 Iluka Resources Limited Appareil de traitement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251280A (en) * 1979-05-21 1981-02-17 Allis-Chalmers Corporation Process for handling and utilizing system gas in a pyro-processing system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3671027A (en) * 1970-09-24 1972-06-20 Hanna Mining Co Heat processing of minerals
US3782888A (en) * 1972-10-04 1974-01-01 Allis Chalmers Method and apparatus for heat treating with heat recuperation from material cooling and auxiliary heat during startup
US3839803A (en) * 1973-01-30 1974-10-08 Fuller Co Method and apparatus for cooling hot particulate material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3671027A (en) * 1970-09-24 1972-06-20 Hanna Mining Co Heat processing of minerals
US3782888A (en) * 1972-10-04 1974-01-01 Allis Chalmers Method and apparatus for heat treating with heat recuperation from material cooling and auxiliary heat during startup
US3839803A (en) * 1973-01-30 1974-10-08 Fuller Co Method and apparatus for cooling hot particulate material

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976422A (en) * 1974-03-04 1976-08-24 Przedsiebiorstwo Projektowania I Wyposazania Odlewni "Prodlew" Apparatus for reclamation of resinous moulding mixes
US4089697A (en) * 1975-02-26 1978-05-16 The Associated Portland Cement Manufacturers Limited Manufacture of Portland cement
US4120645A (en) * 1975-05-13 1978-10-17 Allis-Chalmers Corporation System for handling high sulfur materials
US4047884A (en) * 1976-04-05 1977-09-13 Allis-Chalmers Corporation Means and method for processing cement raw materials containing fuel of high volatile content
US4146360A (en) * 1976-10-12 1979-03-27 Italcementi Fabbriche Riunite Cemento S.P.A. Device for controlling the gas temperature in the drying chamber of a moving grate preheater for cement clinker production
DE2818205A1 (de) * 1978-04-26 1979-11-08 Babcock Krauss Maffei Ind Verfahren zum kuehlen von sintergut bei gleichzeitiger verbesserung der abgas- und abluftentstaubung von drehofen und kuehler
US4334859A (en) * 1978-07-20 1982-06-15 Susumu Minegishi Method and apparatus for melting matrix materials
US4391207A (en) * 1978-07-25 1983-07-05 F. L. Smidth & Co. Method of conditioning exhaust gases from coal firing
US4236887A (en) * 1979-05-21 1980-12-02 Allis-Chalmers Corporation Method and apparatus for handling and utilizing system off-gas in a pyro-processing system
US4422846A (en) * 1980-09-17 1983-12-27 Firma Carl Still Gmbh & Co. Kg Method and apparatus for indirectly drying and preheating fine material
US4551093A (en) * 1982-09-27 1985-11-05 Carter-Wallace Inc. Production of a solid stick in a container
US4592724A (en) * 1983-06-20 1986-06-03 Krupp Polysius Ag Grate cooler and method of cooling
US4503783A (en) * 1983-07-11 1985-03-12 General Kinematics Corporation Furnace ash air seal
DE3538059A1 (de) * 1985-10-25 1987-04-30 Krupp Polysius Ag Vorrichtung zum kuehlen von heissem gut
US4732561A (en) * 1985-10-25 1988-03-22 Krupp Polysius Ag Apparatus for cooling hot material
US5090813A (en) * 1990-07-23 1992-02-25 Cedarapids, Inc. Dual drum recycle asphalt drying and mixing method and apparatus
US5174650A (en) * 1990-07-23 1992-12-29 Cedarapids, Inc. Dual drum recycle asphalt drying and mixing method and apparatus
US5769010A (en) * 1996-02-01 1998-06-23 Btu International, Inc. Furnace including localized incineration of effluents
DE19706265A1 (de) * 1997-02-18 1998-08-20 Krupp Polysius Ag Verfahren zum Brennen von basischem Material
DE19706265B4 (de) * 1997-02-18 2006-02-09 Polysius Ag Verfahren zum Brennen von basischem Material
US6012918A (en) * 1997-06-02 2000-01-11 Doumet; Joseph E. Method and apparatus for producing cement clinker
CN103925596A (zh) * 2014-05-07 2014-07-16 苏州皇森机电科技有限公司 一种高效能的煤气燃烧器
EP3243957B1 (fr) 2016-05-10 2018-12-12 Ermont Installation et procédé d'enrobage de granulats
EP3243957B2 (fr) † 2016-05-10 2021-12-15 Ermont Installation et procédé d'enrobage de granulats
CN111595168A (zh) * 2020-06-02 2020-08-28 福建龙净脱硫脱硝工程有限公司 一种链篦机-回转窑脱硝系统及方法
WO2024173994A1 (fr) * 2023-02-24 2024-08-29 Iluka Resources Limited Appareil de traitement

Also Published As

Publication number Publication date
FR2294415A1 (fr) 1976-07-09
CA1051658A (fr) 1979-04-03
JPS5184820A (en) 1976-07-24
BR7508070A (pt) 1976-08-24
JPS5332811B2 (fr) 1978-09-11
MX146084A (es) 1982-05-12
DE2556046A1 (de) 1976-06-16
FR2294415B1 (fr) 1978-12-15
AU8698275A (en) 1977-06-02
GB1506589A (en) 1978-04-05

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