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US3869248A - Apparatus for burning materials of cement and the like - Google Patents

Apparatus for burning materials of cement and the like Download PDF

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Publication number
US3869248A
US3869248A US361437A US36143773A US3869248A US 3869248 A US3869248 A US 3869248A US 361437 A US361437 A US 361437A US 36143773 A US36143773 A US 36143773A US 3869248 A US3869248 A US 3869248A
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United States
Prior art keywords
furnace
duct
inlet
kiln
cooler
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
US361437A
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English (en)
Inventor
Yoshio Hirai
Yoshimi Yamamoto
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.)
IHI Corp
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IHI Corp
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Filing date
Publication date
Priority claimed from JP5898572U external-priority patent/JPS5143225Y2/ja
Priority claimed from JP9955272A external-priority patent/JPS5240328B2/ja
Priority claimed from JP503273A external-priority patent/JPS523739B2/ja
Application filed by IHI Corp filed Critical IHI Corp
Application granted granted Critical
Publication of US3869248A publication Critical patent/US3869248A/en
Anticipated expiration legal-status Critical
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    • 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
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
    • F27B7/2033—Arrangements of preheating devices for the charge consisting of a single string of cyclones with means for precalcining the raw material
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/432—Preheating without addition of fuel
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/434—Preheating with addition of fuel, e.g. calcining
    • 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

  • F27b 7/02 the like is disclosed wherein a calcining furnace is 58 1 Field of Search 432/103-107, constructed so as to attain the Optimum thermal effi- 432 14 1 1 27 5 32 117 133 ciency, and an air inlet provided with means for selec- 129430; 34/57 95 10, 103 113415 tively opening or closing the inlet is attached to a duct 123430 140 141; 431/173 for conveying combustion air from a cooling device to the calcining furnace so that the introduction of the 5 References Cited combustion air may be controlled.
  • FIGS. 1(A), (B), and (C) illustrate calcining furnaces employed in the conventional burning apparatus
  • FIG. 2 is a schematic view illustrating a conventional burning apparatus of the type employing a calcining furnace
  • FIG. 3 is a schematic view illustrating a conventional burning apparatus not employing a calcining furnace.
  • same reference numerals are used to designate similar parts.
  • the ideal method is to transfer the heat evolved by the combustion of fuel to the finely ground materials suspended in the air flow because the highest thermal efficiency may be attained.
  • the air inlet duct b is tagentially disposed with respect to the main body a, and the feed inlet d as well as the burner c are disposed within the air duct b.
  • This calcining furnace also has a defect that the wear of the refractory materials is extremely increased because the fuel is injected along the furnace wall and the feed tends to adhere to the furnace wall.
  • the air inlet duct b is connected to the bottom of the main body a, and the burner c is disposed at the bottom so as to inject the fuel upwardly.
  • the feed inlet d is disposed at the top.
  • the extremely high temperature zone is formed adjacent to the burner because the density of the feed therearound is low, and since the burner c is directed upwardly the maintenance is very difficult.
  • cyclones e e e and e., which are intercommunicated by ducts f f and f3, are arranged as in the case of the conventional suspension preheater and communicated through a kiln inlet chamber g with a rotary kiln h, the lower end of which is connected through a kiln hood i to a cooler j.
  • the raw meal fed into the duct f by a feeder k is heated by the heated gases flowing from the cyclone e and collected in the cyclone e and dropped into the duct f
  • the raw meal is transferred from the duct f the cyclone e and the duct f to the cyclone 2 so that it is sufficiently preheated before it is chaged into a calcining furnace a.
  • the exhaust gases with a temperature of about 1,lO0C to 1,200C are discharged through the inlet chamber g and a duct n to the duct 1 and mixed with the exhaust gases with a temperature of about 850C discharged from the calcining furnace a. While the mixed exhause gases flow through the cyclone e.,, the duct f;,, the cyclone e the duct f the cyclone 2 the duct f and the cyclone 2 the heat is transferred to the finely ground raw meal, and are finally discharged through an exhaust duct 0 by an exhaust fan p.
  • the hightemperature air which has been heated by the red-hot clinker in the coolerj is introduced through a secondary air duct q into the calcining furnace a.
  • the burner m When the apparatus is started, the burner m is ignited to heat the rotary kiln h and the kiln exhaust gases are introduced into the preheater to heat the same. It takes a long time before the rotary kiln is heated to a desired temperature so that when the exhaust gases are continuously introduced into the preheater, the latter is overheated. In the worst case the blower is burnt out.
  • the conventional apparatus is provided with an auxiliary chimney or stack at the inlet chamber which is an interface between the preheater and the rotary kiln, so that the exhaust gases may be discharged into the atmosphere until the rotary kiln is sufficiently heated.
  • the present apparatus with an auxiliary chimney is shown in FIG. 3. It comprises the cyclones e 2 the ducts f f intercommunicating the cyclones, an auxiliary chimney t, a chimney damper u, and a preheater damper v disposed within a duct w. Furthermore an exhaust damper is provided within the exhaust gas duct intercommunicating between the cyclone e and the blower p.
  • the apparatus shown in FIG. 3 is not provided with a calcining furnace opposed to the apparatus shown in FIG. 2.
  • an exhaust duct or outlet y provided with a damper x is attached to the preheater unit.
  • the exhaust gas outlet y is generally inserted immediately before the uppermost cyclone 2, so that not only the heating may be facilitated by the draft effect when the kiln burner is ignited but also the cooling air may be sucked through the exhaust outlet y when the fuel quantity is increased, when the apparatus is operated under the normal conditions or when the apparatus must be suspended immediately because of the emergency, thereby preventing the overheating of the uppermost cyclone e which is not lined with refractory materials and of the blower.
  • the damper is installed at a portion where the pressure is negative and of the order of -6OO mm Aq.
  • the damper is generally installed at an elevated position, about meters from the ground which, of course varies depending upon the capacity of the apparatus, so that when the damper is opened in case of an emergencysuspension of the apparatus a large amount of heated gases in the kiln is discharged by the stack draft effect, thus resulting in the temperature rise of the upper portions which should be normally cooled. Furthermore it is not preferable to install the damper at such an elevated position in view of the maintenance and repair.
  • One of the objects of the present invention is therefore to maintain the stable combustion in a calcining furnace with a predetermined thermal efficiency.
  • Another object of the present invention is to eliminate the use of a blower for increasing the pressure in the calcining furnace system and to overcome the ad-- verse thermal effects upon the structual members of the preheating unit.
  • a calcining furnace is provided with a plurality of burners which are so arranged that the combustion of fuel within the furnace becomes maximum in the gas flow immediately below a furnace charge inlet and that the velocity of the gas flow within the furnace becomes faster than the flame traveling speed.
  • the calcining furnace is interposed between a suspension preheater and a rotary kiln, and the combustion air consisting of the kiln exhaust gases and the high temperature secondary air is introduced into the calcining furnace.
  • a reduced portion in the form of an orifice is formed within a kiln exhaust gas duct and a control damper is disposed within a secondary air duct so that the introduction of the combustion air into the calcining furnace may be controlled and the use of a blower for increasing the pressure in the secondary air duct may be eliminated.
  • a duct for conveying the air from a cooler in which the clinker discharged from the rotary kiln is cooled, to the calcining furnace is provided with an air inlet which in turn is provided with means such as a damper for selectively opening or closing the air inlet.
  • FIGS. 4(A) and 4(8) are a top and side views of a calcining furnace in accord with the present invention.
  • FIG. 5 is a diagrammatic view illustrating a burning apparatus with a calcining furnace in accord with the present invention
  • FIG. 6 is a view used for the explanation of the relation between a calcining furnace and a kiln exhaust gas flow path.
  • FIG. 7 is a diagrammatic view illustrating another embodiment of a burning apparatus with a calcining furnace in accord with the present invention.
  • a combustion air inlet duct'6 is connected to the bottom of the furnace 1 whereas an exhaust gas duct 7 is connected to the upper periphery thereof.
  • the raw meal charged into the furnace 1 through a feed inlet 5 disposed at the top thereof flows in the direction indicated by the solid lines, and a plurality of burners (three burners in the instant embodiment) 2,3 and 4 are also disposed at the top of the furnace 1.
  • the capacity of the burners 2,3 and 4 is reduced in the order named so that the combustion ratio or condition may be varied. Alternatively the combustion ratio may be varied by a number of burners ignited.
  • the velocity of the combustion air introduced from the air duct 6 is so selected as to become sufficiently higher than the flame propagation or traveling speed, and the opposed or counter flow combustion method is employed so that almost no flame is generated and the finely divided fuel particles which are floating together with the finely ground raw meal in the direction indicated by the broken arrows in the furnace 1 are burnt.
  • a uniform low temperature zone 850- 900C
  • the velocity of the combustion air is higher than the flame traveling speed, the heat transfer to the finely ground raw meal is largely effected by the forced convection and the heat transfer by radiation is only about 10 percent. Therefore the sufficient heat transfer may be effected even when the furnace is maintaimed at a low temperature.
  • the burners have been shown as being disposed at the top of the furnace but it will be understood that the positions of the burners may be changed as the need demands.
  • the optimum positions and capacity of the burners and the combustion ratio by a number of burners may be varied arbitrarily depending upon the construction of the furnace as well as the flow pattern of the raw meal and the fuel therein.
  • the mode of operation of the first embodiment of a burning apparatus with a calcining furnace in accord with the present invention shown FIGS. 5 and 6 is substantially similar to that of the conventional apparatus shown in FIG. 2.
  • the raw meal fed into a duct 12 through a feeder 19 is sufficiently preheated when they flow through a cyclone 8, a duct 13, a cyclone 9, a duct 14 and a cyclone 10 in the order named before they are charged into the calcining furnace l.
  • the raw meal is almost completely calcined in the furnace 1 by the heat of combustion of the fuel injected through the burners 2,3 and 4 into the furnace, and the calcined raw meal is charged into a rotary kiln 16 through a duct 7, a cyclone 11 and an inlet chamber 15.
  • the raw meal in the kiln 16 is burnt by the heat of combustion of the fuel injected through a burner 20 disposed in a kiln hood l7, and the burnt clinker is cooled by a cooler 18.
  • red-hot clinker in the cooler 18 is introduced into a dust precipitation chamber 24 so that the dust-free secondary air may be introduced into the calcining furnace 1 through the duct 6 and that a reduced portion 25 in the form of a fixed orifice is formed in a duct 21 for introducing the exhaust gases discharged from the inlet chamber 15 into the secondary air duct 6 and a control damper 26 is disposed in the secondary air duct 6.
  • the kiln exhaust gases (about 1,100C l,200C) are directed from the inlet chamber 15 through the duct 21 to the secondary air duct 6 where they are mixed with the secondary air (700C 750C) and forced into the calcining furnace 1.
  • the exhaust gases discharged from the calcining furnace 1 can sufficiently heat the finely ground raw meal when they flow through the cyclone 11, the duct 14, the cyclone 10, the duct 13, the cyclone 9, the duct 12 and the cyclone 8, and are discharged through the exhaust gas duct 22 by a blower 23.
  • the pressure loss in the secondary duct system is substantially equal to the pressure loss AP 20 30 mm Aq.
  • the means for compensating the pressure loss in the secondary air duct system may be eliminated.
  • the pressure loss in the secondary air duct system AP including the pressure loss-in the dust precipitaion chamber 24 is of the order of mm Aq. Therefore the pressure difference is AP, AP 30 mm Aq.
  • a pressure control damper may be disposed within the exhaust gas duct 21, but the temperature of the exhaust gases of the kiln is extremely high so that the damper may be easily susceptible to damages.
  • the reduced portion 25 is formed in the duct 21 so that the pressure loss AP becomes slightly in excess of the pressure loss AP, and the control damper 26 is disposed in the secondary air duct 6 through which flows the gases of a relatively low temperature so that the damages to the damper 26 may be minimized.
  • the secondary air is forced into the calcining furnace after it has been mixed with the exhaust gases from the kiln so that there was a fear that the combustion efficiency would be decreased due to the decrease in oxygen content.
  • the second embodiment of the present invention shown in FIG. 7 is substantially similar in construction and operation to that shown in FIGS. 5 and 6 except that a secondary damper 27 is disposed within the secondary air duct 6 connecting the cooler 18 to the calcining furnace l and an air inlet 29 in which is disposed a damper 28 is connected to the secondary air duct 6.
  • An exhaust damper 30 is disposed within the exhaust duct 22, and a blower 31 is connected to the cooler 18 for discharging the excess air therefrom.
  • the preheated raw meal is charged into the calcining furnace 1 from the third stage cyclone 10, and the calcined raw meal is introduced into the fourthstage cyclone 11 and collected.
  • the calcined raw meal in the cyclone 11 is charged into the rotary kiln 16 through its inlet chamber for burning.
  • the secondary air to be forced into the calcining furnace 1 is generally the high temperature air heated by the red-hot clinker in the cooler 18 discharged therein from the kiln l6 and mixed with the exhaust gases discharged from the kiln inlet chamber 15 in the secondary air duct 6.
  • the damper 28 in the inlet 29 is normally closed and the main exhaust fan 23 is driven so that the cooled air may be sucked from the cooler 18 through the secondary air duct when the secondary air duct damper 27 is opened. Therefore the preheating unit may be prevented from being heated in excess of a certain temperature.
  • the calcining furnace 1 is ignited and then the raw meal is fed through the feeder 19 so that the operation may be started in a simple manner.
  • the red hot clinker is discharged into the cooler so that the high temperature air may be extracted therefrom.
  • the inlet damper 28 is opened so that the secondary air may be cooled thereby preventing the overheat of the preheating unit.
  • the sufficient amount of air may be supplied to the preheating unit through the inlet 29 so that the precipitation and accumulation of the suspended finely ground raw meal may be prevented.
  • the excess air in the cooler may be discharged by the exhaust fan 31 after the dust is removed therefrom.
  • the cool air may be sucked through the inlet 29 so as to prevent the preheating unit from being overheated.
  • the damper 30 in the exhaust duct 22 is closed thereby suspending the gas flow in the apparatus to prevent the overheating.
  • the calcining furnace of the type described with reference to FIGS. 4 and 5 is used so that no high temperature zone is formed in the furnace.
  • the vaporization of the alkali content of the raw meal may be prevented, thus eliminating the adverse effects caused by the evaporation of the alkali content.
  • the combustion with a less excess air may be attained and a low temperature atmosphere (about 850C 900C) may be formed so that the formation of nitrogen oxides may be eliminated, thus eliminating the cause of the atmospheric pollution.
  • the temperature in the furnace may be maintained at a relatively low temperature, it will not be required to use the refractory materials adapted to resist against extremely high temperature for the construction of the furnace wall. Furthermore the service life of the furnace wall may be increased.
  • the re-ignition is possible so that the complete shutdown of the furnace may be prevented. Moreover due to the dispersion combustion the thermal efficiency may be increased and the combustion with a less excess air may become possible. Thus the overall cost of fuel may be reduced.
  • the use of the blower for increasing the pressure of the secondary air for the calcining furnace may be eliminated so that the secondary air may be heated to a sufficiently high temperature, thus resulting in the reduction in fuel cost.
  • All of the pressures in the burning apparatus are negative so that the burst of the high temperature gases may be prevented, and the heat of the exhaust gases from the rotary kiln may be effectively recovered thus resulting in the further reduction of fuel cost.
  • the gases introduced into the cyclone system may be relatively lowered in temperature so that the problems such as the adhesion of coating may be overcome.
  • the temperature of the exhaust gases from the burning apparatus may be also lowered, thus resulting in the increase in thermal efficiency.
  • the inlet provided with the damper is attached to the secondary air duct so that the auxiliary chimney attached to the conventional burning apparatus maybe eliminated and the exhaust gases may be prevented from being always discharged into the surrounding atmosphere.
  • the pollution problem may be completely overcome.
  • the negative pressure in the secondary air duct 6 is always of the order of 10 to 50 mm Aq.
  • the sealing of the inlet damper may be simplified and the quantity of leaking air may be minimized.
  • the effect on the kiln draft due to the damper adjustment may be also minimized so that the gas temperatures at various portions may be controlled in an ideal manner without adversely affecting the operation.
  • the component parts are installed at a relatively low position so that the draft of the heated gases from the kiln may be prevented.
  • the inlet 29 may be connected to any portion of the secondary air duct 6 without adversely affecting the operation.
  • the inlet may be provided adjacent to the kiln hood where the operators are always working so that not only the inspection, maintenance and repair may be facilitated but also the manual operation of the damper 28 may be ensured in case of the emergency when the remote control system is out of order.
  • suspension preheater means including a plurality of cyclones (8, 9, 10) for feeding preheated raw meal to the feed inlet of said furnace;
  • a cyclone (11) having an inlet connected with the exhaust gas outlet of said furnace, said cyclone having an exhaust gas outlet connected with the lower portion of said suspension preheater means, and a raw meal outlet;
  • cooler means having an inlet connected with the outlet of said kiln means for receiving the burnt materials produced thereby, said cooler means including also a combustion air outlet;
  • damper means in said secondary air duct intermediate said cooler and said branch duct for regulating the quantity of the combustion air from the cooler that is mixed with the high temperature exhaust gases from the kiln and is supplied to the furnace, said damper means being so adjusted and the restriction of the orifice in said branch duct being so dimensioned that the pressure loss in the secondary duct system substantially equals the pressure loss in the kiln system, the capacity of said exhaust fan means being so selected relative to the burning ratio of the burners that the velocity of the combustion air introduced into the furnace from the secondary air duct is higher than the flame propagation speed, whereby almost no flame is generated and the finely divided fuel particles which are floating with the finely ground raw material are burnt at a relatively low temperature and without the formation of a high temperature zone in the furnace.
  • said secondary air duct contains an air inlet opening (29.) intermediate said damper means and said cooler means, and an auxiliary damper (28) for regulating the amount of air supplied to said secondary air duct via said inlet opening.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
US361437A 1972-05-20 1973-05-18 Apparatus for burning materials of cement and the like Expired - Lifetime US3869248A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5898572U JPS5143225Y2 (de) 1972-05-20 1972-05-20
JP9955272A JPS5240328B2 (de) 1972-10-04 1972-10-04
JP503273A JPS523739B2 (de) 1973-01-08 1973-01-08

Publications (1)

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US3869248A true US3869248A (en) 1975-03-04

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US361437A Expired - Lifetime US3869248A (en) 1972-05-20 1973-05-18 Apparatus for burning materials of cement and the like

Country Status (13)

Country Link
US (1) US3869248A (de)
AU (1) AU471315B2 (de)
CA (1) CA1013567A (de)
CH (1) CH565979A5 (de)
CS (1) CS199240B2 (de)
DE (2) DE2325468B2 (de)
DK (1) DK138435B (de)
ES (1) ES414871A1 (de)
FR (1) FR2186125A5 (de)
GB (1) GB1428828A (de)
IN (1) IN139189B (de)
IT (1) IT987726B (de)
PL (1) PL89125B1 (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914098A (en) * 1973-11-09 1975-10-21 Ishikawajima Harima Heavy Ind Suspension-type preheating system for powdery raw materials
US3940241A (en) * 1974-01-25 1976-02-24 F. L. Smidth & Co. Rotary kiln plant
US3947238A (en) * 1973-10-29 1976-03-30 Onoda Cement Co., Ltd. Method and apparatus for dispersing powered material in a combustion chamber
US3975148A (en) * 1974-02-19 1976-08-17 Onoda Cement Company, Ltd. Apparatus for calcining cement
US4002420A (en) * 1974-05-10 1977-01-11 F. L. Smidth & Co. Method of burning calcined and uncalcined pulverous raw material and rotary kiln plant therefor
US4028049A (en) * 1974-03-29 1977-06-07 Ciments Lafarge S.A. Method and installation of treating raw material for producing cement
US4039277A (en) * 1974-11-07 1977-08-02 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for calcining powder materials
US4050882A (en) * 1976-11-04 1977-09-27 Allis-Chalmers Corporation Dual variable orifice for reinforced preheater
US4059393A (en) * 1975-06-20 1977-11-22 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for calcining powder materials
US4094626A (en) * 1976-11-23 1978-06-13 Fuller Company Apparatus for producing cement clinker
US4135876A (en) * 1976-05-25 1979-01-23 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Method for simultaneously calcining first kind of pulverized materials containing combustible compounds and second kind of pulverized materials
US4201541A (en) * 1974-06-03 1980-05-06 Fritz Schoppe Process and installation for the production of calcined material
US4201546A (en) * 1976-07-09 1980-05-06 Klockner-Humboldt-Deutz Aktiengesellschaft Method and apparatus for the thermal treatment of alkali-containing pulverized raw material to be used in the manufacture of cement
US4209296A (en) * 1977-09-30 1980-06-24 Klockner-Humboldt-Deutz Aktiengesellschaft Apparatus and method for the thermal treatment of fine grained material
US4321238A (en) * 1978-04-20 1982-03-23 Fives-Cail Babcock Process for high temperature phosphate ore burning
US4372784A (en) * 1981-08-21 1983-02-08 Allis-Chalmers Corporation Method for heat treating pulverous raw material calcining combustor therefor
US4386906A (en) * 1980-09-22 1983-06-07 F. L. Smidth & Co. Method for burning granular or pulverous materials and kiln plant thereof
US4407652A (en) * 1980-12-15 1983-10-04 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for calcining raw materials in the form of powder or particles
US4715811A (en) * 1985-07-01 1987-12-29 Fuller Company Process and apparatus for manufacturing low sulfur cement clinker
US4759711A (en) * 1985-11-13 1988-07-26 Chichibu Cement Kabushiki Kaisha Calcination apparatus for use in fluidized-bed burning installation for powdery raw material
EP1923367A1 (de) * 2006-11-13 2008-05-21 Lafarge Verfahren zur Herstellung von Zement
CN109608071A (zh) * 2019-02-15 2019-04-12 中材海外工程有限公司 一种水泥预分解窑用多级预热系统
US11820718B2 (en) 2018-04-30 2023-11-21 Thyssenkrupp Industrial Solutions Ag Oxyfuel clinker production without recirculation of the preheater exhaust gases
US11878950B2 (en) 2018-04-30 2024-01-23 Thyssenkrupp Industrial Solutions Ag Oxyfuel clinker production with special oxygen addition

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446241A (en) * 1974-03-22 1976-08-18 Smdth Co As F L Method of and plant for calcinating pulverous raw material
FR2291161A1 (fr) * 1974-06-06 1976-06-11 Schoppe Fritz Procede, installation et chambre de calcination pour la production de chaux calcinee, pulverulente, tensio-active, et agglomerable, notamment a partir de dechets de l'industrie sucriere
DE2909234C2 (de) * 1979-03-09 1986-02-27 Klöckner-Humboldt-Deutz AG, 5000 Köln Anlage zum Brennen von Rohstoffen für hydraulische Bindemittel, insbesondere Zement
DE3000494A1 (de) * 1980-01-08 1981-07-09 Krupp Polysius Ag, 4720 Beckum Verfahren und anlage zur waermebehandlung von feinkoernigem gut
DK151319C (da) * 1982-09-02 1988-05-09 Smidth & Co As F L Anlaeg til braending af pulverformet materiale
DK381783A (da) * 1982-09-02 1984-03-03 Kawasaki Heavy Ind Ltd Calcineringsapparat med planetkoeler
FR2549816B1 (fr) * 1983-07-28 1985-11-15 Fives Cail Babcock Installation de calcination pour la production de plusieurs qualites d'alumine et procede d'exploitation de cette installation
DE3333705A1 (de) * 1983-09-17 1985-04-04 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und anlage zur herstellung von an schadstoffen armem, insbesondere alkaliarmem zementklinker
FR2552750B1 (fr) * 1983-09-30 1987-08-14 Fives Cail Babcock Procede d'exploitation d'une installation de calcination pour la production de plusieurs qualites d'alumine
US4708644A (en) * 1986-07-08 1987-11-24 Fuller Company Apparatus for roasting fine grained material
DE3701964A1 (de) * 1987-01-23 1988-08-04 Krupp Polysius Ag Vorrichtung zur waermebehandlung von feinkoernigem gut
DE10030613A1 (de) * 2000-06-21 2002-01-03 Kloeckner Humboldt Wedag Anlage zur thermischen Behandlung von mehlförmigen Rohmaterialien
DE102011078766B4 (de) 2011-07-06 2017-02-02 Leibniz-Institut Für Polymerforschung Dresden E.V. Verfahren zur verarbeitung von ptfe
CN112594697B (zh) * 2020-12-28 2023-08-08 华润水泥技术研发（广西）有限公司 一种带外置扩容降氮组合式分解炉及其使用方法

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US3212764A (en) * 1959-10-17 1965-10-19 Kloeckner Humboldt Deutz Ag Method and apparatus for heating and burning cement raw material, containing alkali
US3452968A (en) * 1966-10-12 1969-07-01 Ishikawajima Harima Heavy Ind Roasting process of fine ore and a device therefor
US3544093A (en) * 1968-11-05 1970-12-01 Wyandotte Chemicals Corp Calcining limestone
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US2352738A (en) * 1940-01-15 1944-07-04 Robert F Ruthruff Manufacture of alkali metal silicates
US2580235A (en) * 1947-02-28 1951-12-25 Lellep Otto George Manufacturing wet process cement
US3212764A (en) * 1959-10-17 1965-10-19 Kloeckner Humboldt Deutz Ag Method and apparatus for heating and burning cement raw material, containing alkali
US3452968A (en) * 1966-10-12 1969-07-01 Ishikawajima Harima Heavy Ind Roasting process of fine ore and a device therefor
US3544093A (en) * 1968-11-05 1970-12-01 Wyandotte Chemicals Corp Calcining limestone
US3664650A (en) * 1969-05-23 1972-05-23 Polysius Ag Apparatus for heat treatment of material from which water has been mechanically extracted

Cited By (24)

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Publication number Priority date Publication date Assignee Title
US3947238A (en) * 1973-10-29 1976-03-30 Onoda Cement Co., Ltd. Method and apparatus for dispersing powered material in a combustion chamber
US3914098A (en) * 1973-11-09 1975-10-21 Ishikawajima Harima Heavy Ind Suspension-type preheating system for powdery raw materials
US3940241A (en) * 1974-01-25 1976-02-24 F. L. Smidth & Co. Rotary kiln plant
US3975148A (en) * 1974-02-19 1976-08-17 Onoda Cement Company, Ltd. Apparatus for calcining cement
US4028049A (en) * 1974-03-29 1977-06-07 Ciments Lafarge S.A. Method and installation of treating raw material for producing cement
US4002420A (en) * 1974-05-10 1977-01-11 F. L. Smidth & Co. Method of burning calcined and uncalcined pulverous raw material and rotary kiln plant therefor
US4201541A (en) * 1974-06-03 1980-05-06 Fritz Schoppe Process and installation for the production of calcined material
US4039277A (en) * 1974-11-07 1977-08-02 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for calcining powder materials
US4059393A (en) * 1975-06-20 1977-11-22 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for calcining powder materials
US4135876A (en) * 1976-05-25 1979-01-23 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Method for simultaneously calcining first kind of pulverized materials containing combustible compounds and second kind of pulverized materials
US4201546A (en) * 1976-07-09 1980-05-06 Klockner-Humboldt-Deutz Aktiengesellschaft Method and apparatus for the thermal treatment of alkali-containing pulverized raw material to be used in the manufacture of cement
US4050882A (en) * 1976-11-04 1977-09-27 Allis-Chalmers Corporation Dual variable orifice for reinforced preheater
US4094626A (en) * 1976-11-23 1978-06-13 Fuller Company Apparatus for producing cement clinker
US4209296A (en) * 1977-09-30 1980-06-24 Klockner-Humboldt-Deutz Aktiengesellschaft Apparatus and method for the thermal treatment of fine grained material
US4321238A (en) * 1978-04-20 1982-03-23 Fives-Cail Babcock Process for high temperature phosphate ore burning
US4386906A (en) * 1980-09-22 1983-06-07 F. L. Smidth & Co. Method for burning granular or pulverous materials and kiln plant thereof
US4407652A (en) * 1980-12-15 1983-10-04 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Apparatus for calcining raw materials in the form of powder or particles
US4372784A (en) * 1981-08-21 1983-02-08 Allis-Chalmers Corporation Method for heat treating pulverous raw material calcining combustor therefor
US4715811A (en) * 1985-07-01 1987-12-29 Fuller Company Process and apparatus for manufacturing low sulfur cement clinker
US4759711A (en) * 1985-11-13 1988-07-26 Chichibu Cement Kabushiki Kaisha Calcination apparatus for use in fluidized-bed burning installation for powdery raw material
EP1923367A1 (de) * 2006-11-13 2008-05-21 Lafarge Verfahren zur Herstellung von Zement
US11820718B2 (en) 2018-04-30 2023-11-21 Thyssenkrupp Industrial Solutions Ag Oxyfuel clinker production without recirculation of the preheater exhaust gases
US11878950B2 (en) 2018-04-30 2024-01-23 Thyssenkrupp Industrial Solutions Ag Oxyfuel clinker production with special oxygen addition
CN109608071A (zh) * 2019-02-15 2019-04-12 中材海外工程有限公司 一种水泥预分解窑用多级预热系统

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DK138435C (de) 1979-02-12
DE2365591A1 (de) 1975-11-20
PL89125B1 (en) 1976-10-30
ES414871A1 (es) 1976-05-01
DE2325468B2 (de) 1977-01-27
AU5500873A (en) 1974-10-31
GB1428828A (en) 1976-03-17
CS199240B2 (en) 1980-07-31
DE2365591B2 (de) 1979-10-11
CH565979A5 (de) 1975-08-29
IN139189B (de) 1976-05-22
DE2325468A1 (de) 1973-11-29
AU471315B2 (en) 1976-04-15
FR2186125A5 (de) 1974-01-04
DK138435B (da) 1978-09-04
IT987726B (it) 1975-03-20
CA1013567A (en) 1977-07-12

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