JP2000044300A - Production of cement clinker and producing device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce plural kinds of cement clinker each having a prescribed mineral composition in a prescribed production ratio from the same raw material powder in the same cement clinker producing device. SOLUTION: In the producing method of the cement clinker, at least 2 kinds of the cement clinker having different mineral composition from each other are obtained by classifying the cement clinker from a cooler 20 with a vibrating screen 40 into coarse particles and fine particles of the particle diameter corresponding to 2 kinds of the products, particles having an intermediate particle diameter between that of the coarse particles and the fine particles are collected by classification, the classified coarse particles and the fine particles are fed to respective clinker hopper 92, 94 and the particle having the intermediate particle diameter between that of the coarse particles and the fine particles are distributed to respective clinker hopper 92 and 94 so that the quantity of the cement clinker fed to each clinker hopper 92 and 94 becomes the prescribed ratio (production ratio).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-furnace type cement clinker manufacturing apparatus using a fluidized bed or spouted bed granulating furnace and a fluidized bed baking furnace, or a fluidized bed or spouted bed granulator. The present invention relates to a method and an apparatus for producing a plurality of types of cement clinkers having different mineral compositions from the same raw material powder in a one-furnace type cement clinker production apparatus using a firing furnace.

[0002]

2. Description of the Related Art Cement clinker is a method of preheating a raw material powder mixed and ground with limestone or silica sand, calcining, granulating the preheated and partially calcined raw material powder, firing, and then cooling. Manufactured by Conventionally, in order to produce a cement clinker having a predetermined mineral composition, a raw material powder corresponding to a required cement clinker composition is prepared, and the cement clinker is produced by firing a rotary kiln so that the mineral composition is as uniform as possible. are doing. When manufacturing cement clinker by this rotary kiln firing method,
Although a slight change in the composition is observed depending on the particle size of the cement clinker, the difference in composition does not occur as the type of the cement clinker is different. Therefore, in the rotary kiln firing method, 1
From one type of raw material powder, one type of cement clinker having a stable mineral composition is always obtained. That is, the cement clinker fired in the rotary kiln (piston flow) has a substantially constant residence time and clinker composition, and becomes one kind of cement clinker corresponding to the raw material powder composition.

In recent years, in order to efficiently produce a high-quality cement clinker, a two-furnace type cement clinker manufacturing apparatus combining a fluidized-bed granulating furnace and a rotary kiln-type firing furnace has been proposed (see, for example, Japanese Patent Application Laid-Open No. H7-17751). No.),
2. Description of the Related Art A two-furnace type cement clinker manufacturing apparatus in which a spouted fluidized bed granulating furnace and a fluidized bed firing furnace are combined is known (for example, see Japanese Patent Application Laid-Open No. 6-287039). Further, a one-furnace type cement clinker manufacturing apparatus using a fluidized bed granulating / firing furnace is known in order to efficiently bake high quality cement clinker with small heat loss (for example, Japanese Patent Application Laid-Open No. 8-81245). Reference).

[0004]

In the conventional rotary kiln firing method, to obtain cement clinkers having different mineral compositions, that is, different types of cement clinkers,
It is necessary to change the composition of the raw material powder, and when the production type is changed, the entire production line must be washed out. Therefore, there is a problem that it takes a long time to perform the switching and that a nonstandard product is easily generated at the time of the switching. Also,
Changes in operation may cause the production line to become temporarily unstable.

The inventors of the present invention have conducted intensive studies to solve the problems of the prior art as described above. As a result, cement obtained by granulating and firing a cement raw material powder in a fluidized bed furnace or a spouted bed furnace is obtained. It has been found that the clinker has a larger particle size as the residence time elapses, and that the mineral composition varies depending on the particle size. Specifically, it was found that the small diameter portion of the cement clinker fired with a certain raw material powder composition became a normal cement clinker, and the large diameter portion became an early-strength cement clinker.

The present invention has been made in view of the above-mentioned points, and has been made based on the above-described novel findings. An object of the present invention is to provide a fluidized-bed system or a spouted-bed system for granulation in two furnaces, respectively.
After being fired, or after being granulated and fired in one furnace by a fluidized bed method or a spouted bed method, the cooled cement clinker is classified into a plurality of types of granules each having a predetermined mineral composition, that is, Differentiating by classifying into granules having a particle size corresponding to the varieties and classifying the granules having an intermediate particle size so that the granules having an intermediate particle size can be distributed to the granules corresponding to each variety. It is an object of the present invention to provide a method and an apparatus capable of obtaining a plurality of types of cement clinkers having a mineral composition at a predetermined production rate.

[0007]

In order to achieve the above object, a method for producing a cement clinker according to the present invention comprises introducing a preheated cement raw material powder into a fluidized bed type or spouted bed type granulation furnace. In the method for producing a cement clinker (so-called two-furnace method), the granulated material is then introduced into a fluidized-bed firing furnace and fired, and then the fired material is introduced into a cooler and cooled. Of the cement clinker is classified into coarse particles and fine particles having particle diameters corresponding to at least two types of varieties, to obtain at least two types of cement clinkers having different mineral compositions, and intermediate between the coarse particles and the fine particles. Granules having a particle size are collected by classification, and the classified coarse particles and fine particles are put into separate clinker hoppers, and the amount of cement clinker put into each of the clinker hoppers is set at a predetermined ratio (production amount ratio). So becomes), the granules having an intermediate particle size between coarse and fine are and supplying be allocated to clinker hopper (FIGS. 1-5, 12,
14, 16 and 18).

Further, in the method for producing a cement clinker of the present invention, a preheated cement raw material powder is introduced into a fluidized bed or spouted bed type granulating / firing furnace and granulated and fired. In a method for producing a cement clinker in which a fired product is introduced into a cooler and cooled (so-called one-furnace method), the cement clinker from the cooler is converted into coarse particles and fine particles having a particle size corresponding to at least two types of varieties. Classifying to obtain at least two types of cement clinkers having different mineral compositions, collecting granules having a particle size intermediate between coarse particles and fine particles by classification, and classifying the coarse particles and fine particles respectively. Separate clinker hoppers are charged, and granules having an intermediate particle size between coarse particles and fine particles are added to each of the clinker hoppers so that the amount of cement clinker charged into each clinker hopper becomes a predetermined ratio (proportion of production). K Allocated to Nkahoppa it is characterized by supplying (FIGS. 6 to 11, 13, 15, 17, see FIG. 19).

In the above-mentioned method of the present invention (two-furnace system and one-furnace system), the discharge portion of the granulating furnace (two furnaces) or the granulating / sintering furnace (one furnace) is 0.5 mm or less. It is preferable to classify the fine particles and return the fine particles to a granulating furnace or a granulating and firing furnace. In the method of the present invention (two-furnace method and one-furnace method), fine particles having a size of 0.5 mm or less are classified at the time of classification after cooling, and the fine particles are granulated in a granulating furnace (in the case of two furnaces) or a granulating furnace.
It is preferable to return to the firing furnace (in the case of one furnace) (FIG. 14,
See FIG. 15). Fine particles of 0.5 mm or less are not sufficiently granulated and fired, so they are returned to a granulation furnace or a granulation and firing furnace and granulated and fired, so that the quality of the clinker is further improved and stable. I do. In addition, the particle size of the fine particles to be classified can be set to an arbitrary range of 0.3 to 0.5 mm or less. In addition, the cement raw material powder can be configured so as to be a raw material compound necessary for obtaining a plurality of product types and production ratios (see FIG. 20).

The cement clinker manufacturing apparatus of the present invention comprises:
A suspension preheater for preheating the cement raw material powder, a calciner for calcining the preheated cement raw material powder, a fluidized bed or spouted bed granulator for granulating the calcined cement raw material powder, In a cement clinker manufacturing apparatus (a so-called two-furnace system) including a fluidized bed firing furnace for firing granulated material from a granulated furnace and a cooler for cooling the fired material from the fluidized bed firing furnace, At the cement clinker outlet, the cement clinker from the cooler is classified into coarse particles and fine particles having a particle size corresponding to at least two types of varieties, and at least two types of cement clinkers having different mineral compositions are obtained. A classifier for collecting a granular material having an intermediate particle size between the particles and the fine particles by classification is connected, and a separate clinker hopper is connected to each of the outlet of coarse particles and the outlet of fine particles in the classifier. At the outlet of the granular material having an intermediate particle size between the coarse particles and the fine particles in the classifier, the coarse particles are mixed so that the amount of cement clinker supplied to each clinker hopper becomes a predetermined ratio (proportion of production amount). Distributing means for distributing the granular material having an intermediate particle diameter to the fine particles to each clinker hopper is provided (FIGS. 1 to 5,
12, 14, 16, and 18).

[0011] Further, the cement clinker manufacturing apparatus of the present invention comprises a suspension preheater for preheating cement raw material powder, a calciner for calcining the preheated cement raw material powder, and granulating the calcined cement raw material powder. A cement clinker manufacturing apparatus (a so-called one-furnace method) equipped with a fluidized bed type or spouted bed type granulating / firing furnace for firing and a cooler for cooling the granulated / fired product from the granulating / firing furnace. )), At the cement clinker outlet of the cooler, classify the cement clinker from the cooler into coarse particles and fine particles having a particle size corresponding to at least two kinds of varieties, and at least two types of cement having different mineral compositions. A classifier for obtaining a clinker and collecting a granular material having a particle size intermediate between coarse particles and fine particles by classification is connected to a coarse particle outlet and a fine particle outlet in the classifier. Connect the separate clinker hopper,
At the outlet of the granular material having an intermediate particle size between the coarse particles and the fine particles in the classifier, the coarse particles are mixed so that the amount of cement clinker supplied to each clinker hopper becomes a predetermined ratio (proportion of production amount). Distributing means is provided for distributing the granular material having an intermediate particle diameter to the fine particles to each clinker hopper (FIGS. 6 to 11, 13, 13, 15, and 1).
7, see FIG. 19).

In the above-mentioned apparatus of the present invention (two-furnace system and one-furnace system), a sieve or an air classifier is used as a classifier, and it is particularly preferable to use a vibrating sieve. In the above-described apparatus of the present invention (two-furnace type and one-furnace type), separate clinker hoppers are respectively connected to the outlet of coarse particles and the outlet of fine particles in the vibrating sieve, and the coarse and fine particles in the vibrating sieve are connected to each other. At the outlet of the granular material having an intermediate particle diameter of, a granular material transfer means and a feeder connected to each clinker hopper are provided, and a motor of the feeder and a weight sensor provided at each clinker hopper are determined by a weight value. An electric motor is connected via a ratio setting device so as to be controllable, so that the amount of cement clinker to be supplied to each clinker hopper becomes a predetermined ratio (proportion of production). (See FIGS. 16 and 17).

Further, in the above-described apparatus of the present invention (two-furnace type and one-furnace type), separate clinker hoppers are respectively connected to the outlet of coarse particles and the outlet of fine particles in the vibrating sieve, so that the coarse particles in the vibrating sieve can be removed. A distributor connected to each clinker hopper is provided at the outlet of the granular material having an intermediate particle diameter between the fine particles, and a drive source of the distributor and a weight sensor provided on each clinker hopper are driven by a weight value. The sources are connected via controllable ratio setting devices so that the amount of cement clinker supplied to each clinker hopper is at a predetermined ratio (proportion of production). (See FIGS. 18 and 19).

In the above-described apparatus of the present invention (two-furnace system and one-furnace system), a bifurcated portion is connected to a cement clinker outlet of a cooler, and one of the bifurcated portions is used as a product outlet. On the other hand, the cement clinker is classified into coarse particles and fine particles having a particle diameter corresponding to at least two kinds of varieties, and at least two types of cement clinkers having different mineral compositions are obtained. In some cases, a vibrating sieve for collecting a particulate matter having an intermediate particle size of the above by classification is connected (see FIGS. 12 and 13). Further, the vibrating sieve is a vibrating sieve having at least four stages, and a fine granule outlet for extracting the finest fine granules and a granulating furnace (in the case of two furnaces) or a granulating / firing furnace (in the case of one furnace) through a fine grain transfer line. connection,
In some cases, it is configured to return fine particles of 0.5 mm or less to the granulation furnace (see FIGS. 14 and 15). In addition, when a classification and discharge device is provided at the discharge part of the granulating furnace (in the case of two furnaces) or the granulating and firing furnace (in the case of one furnace), the quality of the clinker is more stable.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments and can be implemented with appropriate modifications. FIG. 1 shows an apparatus (two-furnace type) for producing a cement clinker according to a first embodiment of the present invention.
In FIG. 1, 10 is a suspension preheater including cyclones C1 to C4, 12 is a calcining furnace, 14 is a granulating furnace of a fluidized bed type or a spouted bed type or a combination thereof, 16 is a fluidized bed firing furnace, and 18 is a fluidized bed firing furnace. Primary cooler, 20 is 2
The next cooler. The granulating furnace 14 includes, for example, a burner 22 for forming a local high-temperature region in the vicinity of the center immediately above a gas dispersion plate 21 having a perforated plate structure provided in a throat portion between the granulating furnace and the fluidized bed firing furnace. , 24 to form the granulation furnace into a spouted fluidized bed structure, while the inverted frustoconical portion at the lower part of the granulation furnace can form a downward moving bed of granulated material at a temperature lower than the local high temperature region. (Cone portion) is formed, and a means for blowing and supplying the preheated cement raw material powder to the moving bed is connected to the side wall of the inverted truncated cone, and the cement raw material powder is sufficiently diffused in the moving bed to reach a local high temperature region. It is intended to be.

FIG. 2 and FIG. 3 show an example of a spouted fluidized bed granulation furnace. The granulating furnace 14 and the fluidized bed firing furnace 16
A gas dispersion plate 21 having a perforated plate structure (hole diameter: 20 to 100 mm) is disposed above the throat 15 connecting the upper and lower sides with each other.
A fuel supply line such as a pulverized coal fuel supply line 23 and a burner such as a heavy oil burner 25 are provided in the vicinity of the center of the upper surface of the dispersion plate 21 so as to oppose each other. It is configured so that: On the other hand, the granulating furnace 1
4 is a cylindrical portion 14c constituting the free board portion 14b.
At a temperature lower than the local high-temperature region a, the granulated material can form a downward moving bed b as shown by an arrow, and the height of the inverted truncated cone substantially coincides with the height of the fluidized bed. ) 1
4d. That is, the granulation furnace 14 is configured to have a structure having both a spouted bed and a fluidized bed. One end of a blower 17 is inserted into one end of a side wall of the cone portion 14d formed in the spouted fluidized bed granulator 14 configured as described above.
The other end of the supply line 19 of the preheated cement raw material powder having the following is connected. An ejector 32 is provided in the middle of the supply line 19, and the raw material powder supply chute 68 which is suspended from the cyclone C1 is connected to the ejector 32. It is configured such that the raw material powder can be blown and supplied to the moving bed b formed in the cone portion 14d by the pushing wind action of the pushing blower 17, and the blown and supplied raw material powder is sufficiently diffused in the moving bed b. Then, it reaches the local high temperature region a.

In FIG. 1, the primary cooler 18 is, for example, a fluidized bed cooler, and the secondary cooler 20 is, for example,
It is a packed bed cooler. Note that a fluidized bed cooler or the like may be used instead of the packed bed cooler. Raw material input chute 2
The cement raw material powder introduced into the system from 6 is preheated through the cyclones C4, C3, C2, the calciner 12, the cyclone C1, and partially calcined, and then is supplied to the granulating furnace 14. The granulated and sized granules in the granulation furnace 14 are fed from a discharge chute 28 having an overflow structure to a fluidized bed baking furnace 16 via an L valve (airtight discharge device) 30. After being baked in the above, it is cooled primarily by the primary cooler 18 and then secondary cooled by the secondary cooler to become a cement clinker. 32 is an ejector. The hot air of the primary cooler 18 is introduced and collected in the upper part of the fluidized bed firing furnace 16, and the hot air of the secondary cooler 20 is introduced and collected in the wind box 34 of the fluidized bed firing furnace 16. ing. It should be noted that instead of providing two coolers, a primary cooler and a secondary cooler, a single cooler may be used.

In the cement clinker manufacturing apparatus constructed as described above, a plurality of types of cement clinker are provided at the cement clinker outlet 36 of the secondary cooler 20 (in FIG. 1, for example, two types of cement clinker are used). Is classified into a coarse particle and a fine particle having a particle size corresponding to the above, and a classifier, for example, a vibration sieve 40, for classifying a granular material having an intermediate particle size is connected. A clinker A having a small particle size (fine grain) is collected from the lowermost classifier outlet 42 of the three-stage vibrating sieve 40, and the uppermost classifier outlet 44 is provided.
Clinker B having a large particle size (coarse particle) is collected from the sample. Then, granules having an intermediate particle size are collected from the classifier outlet 45 at the middle stage of the vibrating sieve 40, and the granules having the intermediate particle size can be distributed to the clinker A and the clinker B corresponding to each type. For example, in FIG. 1, when a plurality of types of cement clinkers having different mineral compositions are to be obtained at a predetermined production rate, it is necessary to mix clinker B with clinker A or mix clinker A with clinker B. In addition, when the particles having an intermediate particle size are distributed to the clinker A and the clinker B, the control of the production ratio becomes easier, and the quality of the obtained clinker becomes more stable. In the present embodiment, the vibrating sieve 40 is divided into three stages to classify the clinker A having a small particle size (fine particle) and the clinker B having a large particle size (coarse particle), and the granular material having an intermediate particle size is classified. Although the case of classifying is shown, it is also possible to use four or more vibrating sieves.

FIG. 1 shows a spouted fluidized bed granulation furnace as the granulation furnace 14, but a granulation furnace having another structure is used as the granulation furnace.
For example, a fluidized bed granulator 14a having a structure as shown in FIGS. 4 and 5 can be used. The fluidized-bed granulating furnace 14a shown in FIGS. 4 and 5 has a granulated material drop port 52 on an extension of the upper surface of the gas dispersion plate 50, and a discharge groove 54 extending from the gas dispersion plate 50 to the granulated material drop port 52. The discharge groove is provided with a nozzle 56, and the discharge chute 28 a is connected to the granule falling port 52. By using the fluidized bed granulating furnace 14a having the structure as shown in FIGS. 4 and 5, the classification performance can be improved, and the quality of the clinker can be further stabilized. In this case, it is preferable that air for classification and cooling be blown into the discharge chute 28a.

FIG. 6 shows a cement clinker manufacturing apparatus (single furnace system) according to a second embodiment of the present invention.
In FIG. 6, reference numeral 10 denotes a suspension preheater including cyclones C1 to C4, reference numeral 12 denotes a calciner, and reference numeral 58 denotes a fluidized bed type or spouted bed type or a combination thereof.
The firing furnace 60 is a cooler. The granulating / firing furnace 58 is provided with, for example, a clinker drop port 63 on the upper surface of the gas dispersion plate 61 or an extension of the upper surface of the gas dispersion plate 61 of the fluidized bed granulating / firing furnace. 63
The clinker drop port 63 is provided with a discharge chute 66 and an airtight discharge device 70.
To the cooler 60, to classify the clinker into the discharge chute 66, and to connect a classification / cooling air blowing pipe 71 for cooling, to discharge the clinker from the clinker drop port 63, Discharge chute 6 connected to
Air for classifying and cooling the clinker is blown into the nozzle 6, and the flow rate of the blown air is adjusted so that the flow rate of the air blown out from the drop port 63 is different from the flow rate of the air flowing through the nozzle of the gas dispersion plate 61. The opening area of the drop port 63 is adjusted so that the differential pressure of the layer 73 is in a substantially constant range,
Airtight discharge device 70 below the air blowing position for classification and cooling
Then, the clinker is introduced into the cooler 60 through the above. 32 is an ejector, 75 is a throat, 77
Is a pulse air supply pipe. The cooler 60 is, for example, a packed bed cooler. Note that a fluidized bed cooler or the like may be used instead of the packed bed cooler.

FIG. 7 shows a fluidized-bed granulating / firing furnace 5 having a structure in which a clinker drop port 63 is provided on an extension of the upper surface of the gas dispersion plate 61.
FIG. 8 is a cross-sectional view showing an example of the eighth embodiment. A discharge groove 78 extending from the gas dispersion plate 61 to the clinker drop port 63 is formed, and a nozzle 79 is provided in the discharge groove 78. By using a fluidized-bed granulation / sintering furnace having such a structure, the classification performance can be improved, and the quality of the clinker can be further stabilized.

In FIG. 6, the cement raw material powder introduced into the system from the raw material introduction chute 26 is cyclone C4,
After being preheated and partially calcined through C3, C2, the calciner 12, and the cyclone C1, it is put into the granulating / firing furnace 58. The granulated / fired product granulated / regulated / fired in the granulation / firing furnace 58 is discharged from the discharge chute 66 to the airtight discharge device 7.
After passing through 0, it is put into a cooler 60 and cooled by the cooler 60 to become a cement clinker. The hot air of the cooler 60 is
It is introduced into the fluidized bed granulation / firing furnace 58 through the throat 75 and the gas dispersion plate 61. Granulation from granulation and firing furnace 58
When the calcined product falls into the discharge chute 66 from the clinker drop port 63, the fine cement clinker of 0.5 mm or less is classified, returned to the granulating / firing furnace 58, and granulated and fired. By doing so, the quality of the clinker is improved and stabilized.

In the cement clinker manufacturing apparatus constructed as described above, a plurality of types of cement clinkers are provided at the cement clinker outlet 36 of the cooler 60 (FIG. 6 shows an example of two types of cement clinkers). ), And a classifier such as a vibrating sieve 40 is connected to classify the particles into coarse particles and fine particles having an intermediate particle size. This three-stage vibration sieve 4
A clinker A having a small particle size (fine grain) is collected from the classifier outlet 42 at the lowermost stage of 0, and a clinker B having a large particle size (coarse grain) is collected from the classifier outlet 44 at the uppermost stage. Then, granules having an intermediate particle size are collected from the classifier outlet 45 at the middle stage of the vibrating sieve 40, and the granules having the intermediate particle size can be distributed to the clinker A and the clinker B corresponding to each type. For example, in FIG. 6, when trying to obtain a plurality of types of cement clinkers having different mineral compositions at a predetermined production rate, mixing clinker B with clinker A or mixing clinker A with clinker B In addition, when the particles having an intermediate particle size are distributed to the clinker A and the clinker B, the control of the production ratio becomes easier, and the quality of the obtained clinker becomes more stable. In the present embodiment, the vibrating sieve 40 is divided into three stages to classify the clinker A having a small particle size (fine particle) and the clinker B having a large particle size (coarse particle), and the granular material having an intermediate particle size is classified. Although the case of classifying is shown, it is also possible to use four or more vibrating sieves.

The granulating / firing furnace 58 and the cooler 6 shown in FIG.
Instead of 0, a granulating / firing furnace and a cooler having another structure, for example, a granulating / firing furnace and a cooler having a structure as shown in FIGS. 8 and 9 can be used. The granulating / sintering furnace 58a and the cooler shown in FIG.
A secondary cooler 80 is connected, and the primary cooler 80 is connected to a secondary cooler 60a via an airtight discharge device 70. In the granulating / firing furnace 58b and the cooler shown in FIG. 9, a fluidized bed type primary cooler 80a is connected to the discharge chute 66 through an airtight discharge device 67.
a is connected to a secondary cooler 60b via an airtight discharge device 70. The combination structure of the granulating / firing furnace and the cooler shown in FIGS. 8 and 9 has the advantage that the classification performance is further improved and the quality of the clinker is more stable.

FIGS. 10 and 11 show another example of a spouted fluidized bed granulation / sintering furnace. A gas dispersion plate 61 having a perforated plate structure (hole diameter: 20 to 100 mm) is disposed above a throat 75 that connects the granulating / firing furnace 58c and the cooler 60 in the vertical direction. A fuel supply line such as a pulverized coal fuel supply line 23 and a burner such as a heavy oil burner 25 are provided so as to face each other, and a local high-temperature region a is formed immediately above the dispersion plate 61 in the center. On the other hand, the granulation / sintering furnace 58c is connected to the free board unit 58d.
And the granulated material can form a downward moving bed b as shown by an arrow at a temperature lower than the local high-temperature area a, and the height is substantially the same as the height of the fluidized bed. It is constituted by a truncated cone part (cone part) 58f. That is, the granulation / sintering furnace 58c is configured to have both a spouted bed and a fluidized bed. The other end of the supply line 19 of the preheated cement raw material powder having the indentation blower 17 at one end is connected to the side wall of the cone part 58f formed in the spouted fluidized bed granulation and firing furnace 58c configured as described above. An ejector 32 is interposed in the middle of the supply line 19, and a material powder supply chute 68 suspended from the cyclone C1 is connected to the ejector 32. In this configuration, the raw material powder blown and supplied is sufficiently diffused in the moving layer b to reach the local high temperature region a.

FIG. 12 shows a cement clinker manufacturing apparatus (two furnace system) according to a third embodiment of the present invention. In this embodiment, a bifurcated chute 82 is connected to the cement clinker outlet 36 of the secondary cooler 20, the clinker from one chute 84 is extracted as it is as one type of product, and the vibrating sieve 40 is Connected to, for example, the classifier outlet 42 at the bottom of the vibrating sieve 40
The clinker A having a small particle size (fine particle) is collected from the sampler, and the clinker B having a large particle size (coarse particle) is collected from the classifier outlet 44 at the uppermost stage. Then, a granular material having an intermediate particle size is collected from the classifier outlet 45 at the middle stage of the vibrating sieve 40, and the granular material having the intermediate particle size can be distributed to the clinker A and the clinker B corresponding to each type. Other configurations and operations are the same as those of the first embodiment. In the present embodiment, for example, CaO
With low-heating cement or moderate heat cement with low content,
In the case of producing an early-strength cement having a high CaO content, a cement raw material powder having a composition capable of producing these products is previously blended and prepared, and clinker A having a small particle diameter (fine particle) is prepared.
To classify the clinker for low heat cement or the clinker for medium heat cement, and to classify the clinker for high strength cement as clinker B having a large particle size (coarse particle). At this time, an ordinary cement clinker having a medium CaO content can be obtained from the chute 84 as one type of clinker.

FIG. 13 shows a cement clinker manufacturing apparatus (single furnace system) according to a fourth embodiment of the present invention. In this embodiment, a bifurcated chute 82 is connected to the cement clinker outlet 36 of the cooler 60,
4. Extract the clinker from 4 as it is as one type of product, connect the vibrating sieve 40 to the other chute 86,
For example, a clinker A having a small particle size (fine grain) is sampled from a lower classifier outlet 42 of the vibrating sieve 40, and a clinker B having a larger particle size (coarse grain) is collected from a classifier outlet 44 at the uppermost stage.
Then, a granular material having an intermediate particle size is collected from the classifier outlet 45 at the middle stage of the vibrating sieve 40, and the granular material having the intermediate particle size can be distributed to the clinker A and the clinker B corresponding to each type. Other configurations and operations are the same as those in the second and third embodiments.

FIG. 14 shows a cement clinker manufacturing apparatus (two furnace system) according to a fifth embodiment of the present invention. In the present embodiment, the vibrating sieve is a vibrating sieve 40a having four or more stages (FIG. 14 shows a case of four stages as an example), and a fine particle outlet 88 for extracting the finest fine particles.
And the granulating furnace 14 are connected via a fine particle transfer line 90. The fine particles may be returned to the preheating raw material powder supply chute 68 on the upstream side of the ejector 32, as shown by the broken line in FIG. Vibrating sieve 4
At 0a, the cement clinker B having a large particle size (coarse particle), the granular material having an intermediate particle size, the cement clinker A having a small particle size (fine particle) and fine particles of 0.5 mm or less are classified. Since the fine particles having a diameter of 0.5 mm or less are not sufficiently granulated and fired, they are returned to the granulating furnace 14 and granulated and fired to improve and stabilize the quality of the clinker. Other configurations and operations are the same as those in the first and third embodiments.

FIG. 15 shows a cement clinker manufacturing apparatus (single furnace system) according to a sixth embodiment of the present invention. In the present embodiment, the vibrating sieve is a vibrating sieve 40a having four or more stages (FIG. 15 shows a case of four stages as an example), and the fine particle outlet 88 for extracting the finest fine particles.
And a granulating / sintering furnace 58 are connected via a fine particle transfer line 90. The fine particles may be returned to the preheating raw material powder supply chute 68 on the upstream side of the ejector 32 as shown by the broken line in FIG. Cement clinker B of large grain size (coarse grain) with vibrating sieve 40a,
Granules having an intermediate particle size, cement clinker A having a small particle size (fine particles) and fine particles having a size of 0.5 mm or less are classified. In this case, as described above, at the clinker drop port 63 of the granulation / sintering furnace 58,
The fine particles of 0.5 mm or less have already been classified and returned to the granulating / firing furnace 58, and the amount of fine particles classified by the vibrating sieve 40a is extremely small. , It is also possible to add three or more types of cement clinkers by adding a clinker from the fine particle outlet 88. Other configurations and operations are the same as those in the second, fourth, and fifth embodiments.

FIG. 16 shows a cement clinker manufacturing apparatus (two furnace system) according to a seventh embodiment of the present invention. In this embodiment, each classifier outlet 4 of the vibrating sieve 40 is used.
Classified materials (Clinker A, Clinker A,
Clinker hoppers 92 and 9 for temporarily storing B) separately
4 and a granular material transfer means (for example, a screw conveyor) 96 connected to the classified material outlet 45 from which the granular material having an intermediate particle size is collected, and a supply provided downstream of the granular material transfer means 96. Machines (eg, rotary valves) 98, 9
9, the granular material having an intermediate particle size is supplied to each clinker hopper 9.
2, 94 can be supplied. Then, the weight sensors 100 and 102 provided in the respective clinker hoppers 92 and 94 and the electric motors 104 of the feeders 98 and 99,
And the motor 1 based on the values of the weighing scales 108 and 110.
Connected via a control line equipped with a ratio setter 112 so that each clinker hopper 9 can be controlled.
By adjusting the distribution ratio of the granular material having an intermediate particle diameter distributed to the clinker hoppers 2 and 94, it is possible to produce the classified products corresponding to the respective varieties supplied to the clinker hoppers 92 and 94 at a constant weight ratio. It was done. In the present embodiment, the weight sensors 100 and 102 can detect how much clinker enters the clinker per time when the clinker is not discharged from the clinker hoppers 92 and 94. By controlling the number of rotations, even if the classification amount of the cement clinker A having a small particle diameter (fine particle) and the classification amount of the cement clinker B having a large particle diameter (coarse particle) fluctuate, the granularity of the intermediate particle diameter is changed. The object is distributed to the clinker hoppers 92 and 94, and two types of cement clinkers having different mineral compositions are targeted, which is easier than mixing clinker B with clinker A or mixing clinker A with clinker B. And a more stable quality.

For example, when the cement raw material powder is used as a raw material compound necessary for obtaining a plurality of product types and production ratios, as an example, as shown in Table 1, ordinary cement (N
It is assumed that C) and early-strength cement (HC) are to be produced at a weight ratio of 2: 1.

[0032]

[Table 1]

In this case, the required amount of the raw material powder is 3 (= 2 +
In 1), the composition corresponds to the weighted average of the composition of the ordinary cement to be obtained and the composition of the early-strength cement. In the case where such necessary raw material powder is blended, FIG.
As shown in (1), a predetermined amount of limestone, clay, silica stone, iron slag, etc. is supplied to a dryer (for example, a rotary hot air dryer) 116 via a conveyor 114 and dried, and then the dried product is crushed. Then, the raw material powder is pulverized by feeding into a solid-gas separator 120 such as a cyclone and separated into raw material powder and exhaust gas.
And then pressurized air is supplied to stir and homogenize, and then the raw material charging chute 26 is used as cement raw material powder (see FIG. 16).
From the system.

In FIG. 16, when the cement clinker produced from the cement raw material powder blended and prepared as described above is classified, clinker A having a small particle diameter (fine grain) corresponds to a clinker for ordinary cement, The clinker B having a particle size (coarse particle) corresponds to a clinker for an early-strength cement.
Then, each clinker is added with gypsum and pulverized to produce two types of products, ordinary cement and early-strength cement. Here, clinker A and clinker B
Is 2: 1 (weight ratio), the clinker hopper 9
The above-mentioned pulverizing process may be performed by directly extracting the clinkers A and B put into the second and the second 94, but the ratio between the clinker A and the clinker B may fluctuate due to fluctuations in operating conditions and the like. For example, the ratio of clinker A to clinker B is 2.
5: 0.5 (weight ratio), including the particulate matter having an intermediate particle size, the weight ratio is clinker A: intermediate particle size: clinker B
In the case of 2.5: 1.5: 0.5, among the granules having an intermediate particle diameter of 1.5 sent to the granule transfer means 96,
0.5 of the clinker hopper 9 through the feeder 98.
2 and the remaining 1.0 particulate matter is controlled to be distributed to the clinker hopper 94 via the feeder 99, so that the clinker supplied to the clinker hopper 92 and the clinker supplied to the clinker hopper 94 are controlled. Is 2: 1 (weight ratio)
become. Other configurations and operations are described in the first, third, and fifth embodiments.
This is the same as in the case of the form.

FIG. 17 shows a cement clinker manufacturing apparatus (one furnace type) according to an eighth embodiment of the present invention. In this embodiment, each classifier outlet 4 of the vibrating sieve 40 is used.
Classified materials (Clinker A, Clinker A,
Clinker hoppers 92 and 9 for temporarily storing B) separately
4 and a granular material transfer means (for example, a screw conveyor) 96 connected to the classified material outlet 45 from which the granular material having an intermediate particle size is collected, and a supply provided downstream of the granular material transfer means 96. Machines (eg, rotary valves) 98, 9
9, the granular material having an intermediate particle size is supplied to each clinker hopper 9.
2, 94 can be supplied. Then, the weight sensors 100 and 102 provided in the respective clinker hoppers 92 and 94 and the electric motors 104 of the feeders 98 and 99,
And the motor 1 based on the values of the weighing scales 108 and 110.
Connected via a control line equipped with a ratio setter 112 so that each clinker hopper 9 can be controlled.
By adjusting the distribution ratio of the granular material having an intermediate particle diameter distributed to the clinker hoppers 2 and 94, it is possible to produce the classified products corresponding to the respective varieties supplied to the clinker hoppers 92 and 94 at a constant weight ratio. It was done. In the present embodiment, the weight sensors 100 and 102 can detect how much clinker enters the clinker per time when the clinker is not discharged from the clinker hoppers 92 and 94. By controlling the number of rotations, even if the classification amount of the cement clinker A having a small particle diameter (fine particle) and the classification amount of the cement clinker B having a large particle diameter (coarse particle) fluctuate, the granularity of the intermediate particle diameter is changed. The object is distributed to the clinker hoppers 92 and 94, and two types of cement clinkers having different mineral compositions are targeted, which is easier than mixing clinker B with clinker A or mixing clinker A with clinker B. And a more stable quality. Other configurations and operations are the same as those in the second, fourth, sixth, and seventh embodiments.

FIG. 18 shows a cement clinker manufacturing apparatus (two furnace system) according to a ninth embodiment of the present invention. In this embodiment, each classifier outlet 4 of the vibrating sieve 40 is used.
Clinker hoppers 92 and 94 for temporarily and separately storing classified products (clinkers A and B) corresponding to each type are connected to the products 2 and 44 via the classified product supply lines 124 and 126, respectively. A distributor 128 is connected to the classifier outlet 45 where the granules are collected, so that granules having an intermediate particle diameter can be distributed and supplied to the respective clinker hoppers 92 and 94. Then, the weight sensors 100 and 102 provided in each of the clinker hoppers 92 and 94 and the driving source 1 of the distributor 128 are provided.
30 and the drive source 13 based on the values of the weigh scales 108 and 110.
0 is controlled via a control line provided with a ratio setting device 112 so as to be able to control the clinker hoppers 92 and 94. , 94 are classified so as to be able to produce classified products corresponding to the respective varieties at a constant weight ratio. In FIG. 18, the distributor 128 is connected to the classified supply lines 124 and 126. However, the distributor 128 is not connected to the classified supply lines 124 and 126, and the distributed intermediate particle size granules are not connected. It is also possible to adopt a configuration in which objects are directly charged into the clinker hoppers 92 and 94 separately from the clinkers A and B. Also in the present embodiment, by distributing the particulate matter having the intermediate particle size to the clinker hoppers 92 and 94, the difference is more easily achieved than mixing the clinker B with the clinker A or mixing the clinker A with the clinker B. Two types of cement clinkers having a mineral composition can be obtained at a target production ratio and more stable quality. Other configurations and operations are the first, third, and third embodiments.
This is the same as in the fifth and seventh embodiments.

FIG. 19 shows a cement clinker manufacturing apparatus (single furnace system) according to a tenth embodiment of the present invention. In this embodiment, each classifier outlet 4 of the vibrating sieve 40 is used.
Clinker hoppers 92 and 94 for temporarily and separately storing classified products (clinkers A and B) corresponding to each type are connected to the products 2 and 44 via the classified product supply lines 124 and 126, respectively. A distributor 128 is connected to the classifier outlet 45 where the granules are collected, so that granules having an intermediate particle diameter can be distributed and supplied to the respective clinker hoppers 92 and 94. Then, the weight sensors 100 and 102 provided in each of the clinker hoppers 92 and 94 and the driving source 1 of the distributor 128 are provided.
30 and the drive source 13 based on the values of the weigh scales 108 and 110.
0 is controlled via a control line provided with a ratio setting device 112 so as to be able to control the clinker hoppers 92 and 94. , 94 are classified so as to be able to produce classified products corresponding to the respective varieties at a constant weight ratio. Also in the present embodiment, the clinker B is mixed with the clinker A by distributing the particulate matter having an intermediate particle size to the clinker hoppers 92 and 94,
Thus, two types of cement clinkers having different mineral compositions can be obtained at a target production ratio and with more stable quality, than by mixing clinker A into the cement. Other configurations and operations are the same as those in the second, fourth, sixth, eighth, and ninth embodiments.

In the embodiment of the present invention described above, a configuration in which the third and fifth embodiments are combined, a configuration in which the third and seventh embodiments are combined, a third and a third embodiments are described.
A configuration in which the ninth embodiment is combined, a configuration in which the fifth and seventh embodiments are combined, a configuration in which the fifth and ninth embodiments are combined, a configuration in which the third, fifth, and seventh embodiments are combined; It is also possible to adopt a configuration in which the third, fifth, and ninth embodiments are combined. Similarly, in the embodiment of the present invention, a configuration combining the fourth and sixth embodiments, a configuration combining the fourth and eighth embodiments, a fourth embodiment,
A configuration in which the tenth embodiment is combined, a configuration in which the sixth and eighth embodiments are combined, a configuration in which the sixth and tenth embodiments are combined, a configuration in which the fourth, sixth, and eighth embodiments are combined; It is also possible to adopt a configuration in which the fourth, sixth and tenth embodiments are combined.

[0039]

As described above, the present invention has the following effects. (1) Since a plurality of types of cement clinkers having a predetermined mineral composition can be manufactured from the same raw material powder in the same apparatus of the two-furnace system or the one-furnace system, loss accompanying switching of cement types is eliminated, and low Cost can be reduced. (2) The ratio of the cement clinker production amount can be adjusted by adjusting the raw material powder composition. (3) By allocating the intermediate-size granules to the granules having the particle sizes corresponding to the respective varieties, the production ratio can be easily changed, and the quality of the cement clinker can be further stabilized. (4) When the fine particles of 0.5 mm or less are classified at the clinker dropping port and returned to the granulating furnace or the granulating / firing furnace, the quality of the cement clinker is further improved and stabilized. (5) When a classification and discharge device is provided at the discharge part of the granulating furnace or the granulating and firing furnace, the quality of the cement clinker is further improved and stabilized.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing a cement clinker manufacturing apparatus (two furnace system) according to a first embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view showing an example of a granulation furnace in FIG.

FIG. 3 is a sectional view taken along line AA in FIG. 2; However,
Illustration of the spouted fluidized bed and the moving bed is omitted.

FIG. 4 is a schematic vertical sectional view showing another example of the granulation furnace in FIG. 1.

FIG. 5 is an explanatory cross-sectional view of the granulation furnace shown in FIG. However, illustration of the fluidized bed is omitted.

FIG. 6 is a flow sheet showing a cement clinker manufacturing apparatus (single furnace method) according to a second embodiment of the present invention.

FIG. 7 is an explanatory cross-sectional view of the granulation / sintering furnace in FIG. 6; However, illustration of the fluidized bed is omitted.

FIG. 8 is a schematic vertical sectional view showing another example of the granulating / firing furnace and the cooler in FIG.

FIG. 9 is a schematic vertical sectional view showing another example of the granulating / firing furnace and the cooler in FIG.

FIG. 10 is a schematic vertical sectional view showing still another example of the granulating / firing furnace in FIG. 6;

11 is a sectional view taken along line BB in FIG. 10; However, illustration of the spouted fluidized bed and the moving bed is omitted.

FIG. 12 is a flow sheet showing a cement clinker manufacturing apparatus (two furnace system) according to a third embodiment of the present invention.

FIG. 13 is a flow sheet showing a cement clinker manufacturing apparatus (single furnace method) according to a fourth embodiment of the present invention.

FIG. 14 is a flow sheet showing a cement clinker manufacturing apparatus (two furnace system) according to a fifth embodiment of the present invention.

FIG. 15 is a flow sheet showing a cement clinker manufacturing apparatus (single furnace method) according to a sixth embodiment of the present invention.

FIG. 16 is a flow sheet showing a cement clinker manufacturing apparatus (two-furnace system) according to a seventh embodiment of the present invention.

FIG. 17 is a flow sheet showing a cement clinker manufacturing apparatus (one furnace method) according to an eighth embodiment of the present invention.

FIG. 18 is a flow sheet showing an apparatus (two-furnace system) for producing a cement clinker according to a ninth embodiment of the present invention.

FIG. 19 is a flow sheet showing a cement clinker manufacturing apparatus (one furnace system) according to a tenth embodiment of the present invention.

FIG. 20 is a flow sheet showing an apparatus for mixing and preparing raw material powder used in the apparatus for manufacturing a cement clinker of the present invention.

[Explanation of symbols]

 C1 to C4 Cyclone 10 Suspension preheater 12 Calcination furnace 14, 14a Granulation furnace 14b, 58d Free board part 14c, 58e Cylindrical part 14d, 58f Cone part 15, 75 Throat 16 Fluidized bed sintering furnace 17 Indentation blower 18, 80, 80a Primary cooler 19 Preheating cement raw material supply line 20, 60a, 60b Secondary cooler 21, 50, 61 Gas distribution plate 22, 24 Burner 23 Pulverized coal fuel supply line 25 Heavy oil burner 26 Raw material input chute 28, 28a, 66 discharge chute 30, 67, 70 airtight discharge device 32 ejector 34 wind box 36 cement clinker outlet 40, 40a vibrating sieve 42, 44, 45 classified material outlet 52 granulated material falling port 54, 78 discharge groove 56, 79 nozzle 58, 58a, 58b, 58c Granulation and firing furnace 0 Cooler 63 Clinker drop port 65 Gate 68 Preheating material supply chute 71 Classification / cooling air blowing pipe 73 Fluidized bed 77 Pulse air supply pipe 82 Bifurcated chute 84 One chute 86 The other chute 88 Fine outlet 90 Fine particle transfer line 92 , 94 Clinker hopper 96 Granular material transfer means 98, 99 Feeder 100, 102 Weight sensor 104, 106 Electric motor 108, 110 Weight scale 112 Ratio setter 114 Conveyor 116 Dryer 118 Crusher 120 Solid-gas separator 122 Air blending silo 124 , 126 Classification material supply line 128 Distributor 130 Drive source

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shozo Kanamori 3-1-1, Higashikawasakicho, Chuo-ku, Kobe Kawasaki Heavy Industries, Ltd. Kobe Plant (72) Inventor Noboru Ichiya 3-chome, Higashikawasakicho, Chuo-ku, Kobe 1-1 Kobe Plant in Kawasaki Heavy Industries, Ltd. (72) Katsuharu Mukai 1-Kandamidochicho, Chiyoda-ku, Tokyo Sumitomo Osaka Cement Co., Ltd. (72) Toshiyuki Ishibachi Inventor Toshiyuki Kanda, Chiyoda-ku, Tokyo No. 1 Toshirocho Sumitomo Osaka Cement Co., Ltd. F-term (reference) 4G012 KD07

Claims (13)

[Claims] 1. A preheated cement raw material powder is introduced into a fluidized bed type or spouted bed type granulating furnace for granulation, and then the granulated material is introduced into a fluidized bed calcining furnace and calcined. In the method for producing a cement clinker for introducing and cooling a material into a cooler, the cement clinker from the cooler is classified into coarse particles and fine particles having a particle size corresponding to at least two kinds of varieties, and different mineral compositions are obtained. Along with obtaining at least two types of cement clinkers having, a granular material having an intermediate particle size between coarse particles and fine particles is collected by classification, and the classified coarse particles and fine particles are respectively charged into separate clinker hoppers, In such a manner that the amount of cement clinker supplied to each clinker hopper has a predetermined ratio, a granular material having an intermediate particle size between coarse particles and fine particles is distributed and supplied to each clinker hopper. Cement chalk Manufacturing method of linker. 2. The preheated cement raw material powder is introduced into a fluidized-bed or spouted-bed type granulating / firing furnace for granulation / firing, and then the granulated / firing product is introduced into a cooler for cooling. In the method for producing a cement clinker, a cement clinker from a cooler is classified into coarse particles and fine particles having a particle diameter corresponding to at least two kinds of varieties to obtain at least two types of cement clinkers having different mineral compositions. At the same time, a granular material having an intermediate particle size between coarse particles and fine particles is collected by classification, and the classified coarse particles and fine particles are put into separate clinker hoppers, and the cement is put into each clinker hopper. A method for manufacturing a cement clinker, characterized in that a granular material having an intermediate particle size between coarse particles and fine particles is distributed and supplied to each clinker hopper so that the clinker amount becomes a predetermined ratio. 3. The method of claim 1, wherein the discharge of the granulation furnace or the granulation / sintering furnace is carried out.
Classify fine particles of 5mm or less and granulate them in a granulating furnace or granulator.
3. The method for producing a cement clinker according to claim 1, wherein the cement clinker is returned to a firing furnace. 4. The method for producing a cement clinker according to claim 1, wherein at the time of classification after cooling, fine particles of 0.5 mm or less are classified, and the fine particles are returned to a granulating furnace or a granulating / firing furnace. . 5. The cement raw material powder is a raw material blend necessary for obtaining a plurality of product types and production ratios.
The method for producing a cement clinker according to any one of claims 1 to 4. 6. A suspension preheater for preheating cement raw material powder, a calciner for calcining the preheated cement raw material powder, and a fluidized bed type or spouted bed type granulator for granulating the calcined cement raw material powder. A granulating furnace, a fluidized bed firing furnace for firing granulated material from the granulating furnace, and a cooler for cooling the fired material from the fluidized bed firing furnace; At the outlet, the cement clinker from the cooler is classified into coarse particles and fine particles having a particle size corresponding to at least two types, and at least two types of cement clinkers having different mineral compositions are obtained. A classifier for collecting a granular material having an intermediate particle size from the fine particles by classification is connected, and a separate clinker hopper is connected to an outlet for coarse particles and an outlet for fine particles in the classifier. At the outlet of the granular material having an intermediate particle size between the coarse particles and the fine particles, the intermediate particles between the coarse particles and the fine particles are adjusted so that the amount of cement clinker supplied to each clinker hopper becomes a predetermined ratio. An apparatus for manufacturing a cement clinker, comprising a distributing means for distributing particulate matter having a diameter to each clinker hopper. 7. A suspension preheater for preheating cement raw material powder, a calciner for calcining the preheated cement raw material powder, and a fluidized bed type or spouted bed type for granulating and calcining the calcined cement raw material powder. A cement clinker manufacturing apparatus comprising: a granulating / sintering furnace; and a cooler for cooling the granulated / sintered product from the granulating / sintering furnace, a cement clinker from a cooler is provided at a cement clinker outlet of the cooler. Are classified into coarse particles and fine particles having a particle diameter corresponding to at least two kinds of varieties, and at least two types of cement clinkers having different mineral compositions are obtained, and a particle diameter intermediate between the coarse particles and the fine particles is obtained. A classifier for collecting the granular material having the particles by classification is connected, and a separate clinker hopper is connected to each of the outlet of the coarse particles and the outlet of the fine particles in the classifier. At the outlet of the granular material having a particle size, a granular material having an intermediate particle size between coarse particles and fine particles is supplied to each clinker hopper so that the amount of cement clinker supplied to each clinker hopper becomes a predetermined ratio. An apparatus for producing a cement clinker, comprising a distributing means for distributing. 8. The cement clinker manufacturing apparatus according to claim 6, wherein the classifier is a vibrating sieve. 9. A separate clinker hopper is connected to each of the outlet of coarse particles and the outlet of fine particles in the vibrating sieve, and the outlet of the granular material having an intermediate particle size between coarse particles and fine particles in the vibrating sieve is A feeder connected to the object transfer means and each clinker hopper is provided, and a motor of the feeder and a weight sensor provided on each clinker hopper are connected via a ratio setting device so that the motor can be controlled by a weight value. Then, it is configured such that the granular material having an intermediate particle diameter between coarse particles and fine particles is distributed to each clinker hopper so that the amount of cement clinker supplied to each clinker hopper becomes a predetermined ratio. An apparatus for manufacturing a cement clinker according to claim 8. 10. A separate clinker hopper is connected to each of the coarse-grain outlet and the fine-grain outlet of the vibrating sieve, and each of the granular sieves having an intermediate particle size between the coarse and fine granules in the vibrating sieve is connected to each of the outlets. A dispenser connected to the clinker hopper is provided, and a drive source of the dispenser and a weight sensor provided on each clinker hopper are connected via a ratio setting device so that the drive source can be controlled by a weight value. 9. The apparatus according to claim 8, wherein a granular material having an intermediate particle size between coarse particles and fine particles is distributed to each of the clinker hoppers so that the amount of cement clinker supplied to each of the clinker hoppers becomes a predetermined ratio.
An apparatus for manufacturing the cement clinker according to the above. 11. A bifurcated portion is connected to a cement clinker outlet of a cooler, and one of the bifurcated portions is used as a product outlet, and the other of the bifurcated portions is provided with a cement clinker having a particle size corresponding to at least two types of varieties. To obtain at least two types of cement clinkers having different mineral compositions, and to obtain a granular material having an intermediate particle size between the coarse particles and the fine particles by classification. The cement clinker manufacturing apparatus according to claim 8, 9 or 10, further comprising a sieve connected thereto. 12. A vibrating sieve having at least four stages of vibrating sieves, and a fine particle outlet for extracting the finest fine particles and a granulating furnace or a granulating / sintering furnace are connected via a fine particle transfer line. An apparatus for producing a cement clinker according to any one of the above. 13. The cement clinker manufacturing apparatus according to claim 6, wherein a classifying and discharging device is connected to a discharging portion of the granulating furnace or the granulating / firing furnace.