JPH0825342A - Mixing stirrer and mixing and stirring method - Google Patents

Abstract

PURPOSE:To supply a different kind of stable slips large in specific gravity difference by simple adjustment using an independent mixer. CONSTITUTION:A powder supply pipe 40 supplying a component to be kneaded, a water supply pipe 42 supplying kneading water, a first foam supply pipe 44 supplying foam to the component to be kneaded in order to adjust the vol. of slip and a third foam supply pipe 41 additionally supplying foam to the slip of an internal region are connected to the upper plate 22 of a mixer 10 so as to mutually leave a predetermined angle interval. The annular wall 23 of the mixer 10 is connected to the upper end part of a slip supply pipe 48 through a hollow connection part 47 and a second foam supply pipe 49 supplying foam to the component to be kneaded is connected to the upper end part of the slip supply pipe 48. A dispensing port 46 is arranged to the annular wall 23 and contains a pair of dispensing ports 46a, 46b. The respective dispensing ports are arranged to the annular wall at positions spaced apart from the connection part at a predetermined angle interval and connected to pipings 12a, 12b. These pipings communicate with a pipeline 12 emitting slip to an edge region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing stirrer (mixer) and a mixing stirrer, and more particularly to a mixing stirrer which is widely used as a building material, especially as an interior material. The present invention relates to a mixing stirrer and a mixing and stirring method using the mixing stirrer.

[0002]

2. Description of the Related Art Gypsum board is widely used as an interior material for construction because of its fire resistance, sound insulation, workability and economy. The gypsum board is a plate-like body obtained by coating a gypsum-based core with a gypsum board base paper, and during production, calcined gypsum, an adhesion aid, a hardening accelerator, a foam for reducing weight, and the like. Additive, etc., and further kneading the admixture and water, and pouring the resulting calcined gypsum slurry (hereinafter referred to as sludge) between the upper and lower base paper for gypsum board to form a plate, After that, it is roughly cut after curing and cut into product dimensions after forced drying. Here, the sludge is generally manufactured using a thin circular mixer. Such a mixer generally has a fixed flat circular housing and a turntable rotatably arranged in the housing, and a plurality of kneading component supply ports are arranged in the upper lid central region of the housing. A discharge port for discharging the kneaded material is provided on the outer peripheral portion of the housing. Further, a rotary shaft that rotates the rotary disc and a drive device for the rotary shaft are connected to the rotary disc. The upper lid or plate of the housing is provided with a plurality of upper pins that hang down to the vicinity of the turntable, the turntable has lower pins that are planted on the turntable and extend to the vicinity of the top plate, and the upper and lower pins are: The plurality of components to be kneaded, which are alternately arranged in the radial direction, are supplied to the upper region of the rotating disk through the respective supply ports. The components supplied are stirred and mixed, and are moved radially outward on the rotating disk by the action of centrifugal force,
It is discharged out of the machine through a discharge port arranged on the outer peripheral portion. This type of kneader is called a pin-type kneader, and this type of kneader is disclosed, for example, in US Pat.
No. 9,620.

As a kneading machine of a type other than the pin type kneading machine, for example, a kneading machine disclosed in Japanese Patent Publication No. 58-16929 has a housing and a rotary disk arranged in the housing. Therefore, a plurality of deflection blades are arranged on the upper surface of the turntable. In addition, a tooth portion or a tooth-shaped portion that presses the kneaded material outward is formed on the peripheral portion of the rotating disk. Generally, in the gypsum board in the forced drying step, the drying speed of the edge portion or the edge area of the gypsum board is relatively faster than the drying speed of the widthwise central portion of the gypsum board. For this reason, strength reduction and poor adhesion due to excessive drying are likely to occur at the edge portion. As a measure for preventing such overdrying, a part of the kneaded sludge is introduced into a secondary mixer that rotates at high speed and re-stirred to destroy or eliminate the bubbles in the sludge to increase the specific gravity of the sludge part, thus obtained. The obtained high specific gravity sludge is discharged or discharged onto the lower paper corresponding to the edge of the gypsum board.

[0004]

However, in such a sub-mixer system, the sludge in the sub-mixer is re-kneaded by high-speed rotation, and the sludge hardening time is shortened.
For this reason, a retarder must be added to the sludge to intentionally delay the set time of the sludge. However, it is difficult to easily control the curing time and the amount of retarder added,
Therefore, the mixer is occasionally clogged or jammed, and the operation of the mixer and the production line are accordingly forced to be stopped. Further, since the sub mixer rotates at a high speed, the rotary disk and the like of the sub mixer are easily worn, and the maintenance and inspection work of the sub mixer is a considerable work burden. Furthermore, the defoaming ability of the auxiliary mixer is limited, and it is difficult to continuously and stably supply the slurry having a stable and required high specific gravity. The present invention has been made in view of such a point, and an object thereof is to provide a mixing stirrer and a mixing stirrer that can supply stable and different types of sludge having a large difference in specific gravity by simple adjustment, and by a single mixer. It is to provide a stirring method.

[0005]

In order to achieve the above object, the present invention provides a flat and circular housing having an annular wall on the outer periphery and a kneading material for supplying the kneading material into the housing. A supply port arranged in the central region of the upper plate, a sludge feeding port arranged in the outer circumferential region of the casing for continuously feeding sludge outside the machine, and a rotation rotatably arranged in the casing. And a rotary drive device for rotating the rotary disk, wherein the kneading material is supplied to the upper region of the rotary disk through the supply ports and is agitated and mixed, and the rotary disk is acted by centrifugal force. In a mixing stirrer that moves upward in the radial direction and is fed from the sludge feed port to the outside of the machine, at least one dispensing port for taking out at least a part of the sludge is arranged in an outer peripheral region of the housing. And the rotation direction of the sludge feeding port on the downstream side in the rotation direction of the dispensing port The peripheral region of the upstream side, provides a mixed agitator, characterized in that the foam supply port for supplying the the slip of the outer peripheral region of the foam for mud 漿容 product adjustment is arranged. In a preferred embodiment of the present invention, a second foam supply port is arranged in the feed port or a slurry feed pipe communicating with the feed port,
The foam supply port supplies a foam for adjusting the volume of the sludge to the sludge fed from the supply port to the outside of the machine.

[0006] In a further preferred aspect of the present invention, at least one third foam supply port for supplying foam for adjusting the sludge volume is provided in the central region downstream of the supply port for supplying the kneading material in the rotational direction. To be The present invention also continuously supplies the flat and circular housing having an annular wall on the outer periphery, the supply port arranged in the central region of the casing, and the sludge located in the outer peripheral region of the casing to the outside of the machine. In a mixing and stirring method using a mixing and stirring machine equipped with a slurry feeding port for sending, a rotary disk rotatably arranged in the housing, and a rotary drive device for rotating the rotary disk, the components to be kneaded are , Is supplied to the upper area of the rotary disk through the supply port, and the components are stirred and mixed, and are moved radially outward on the rotary disk by the action of centrifugal force, and a predetermined amount for sludge adjustment is provided. Bubbles are mixed in the slurry located in the outer peripheral region of the housing, and the mixed slurry is fed from the slurry feeding port to the outside of the machine, and the slurry is mixed from the collecting port before mixing the bubbles. There is provided a mixing and stirring method characterized by feeding the mixture to the outside of the machine. In a preferred embodiment of the present invention, bubbles for adjusting the volume of the sludge are further supplied to the sludge fed to the outside of the machine through the sludge feeding port. In one embodiment of the present invention, the kneading material is a hydraulic material. The kneaded sludge is generally used in the method of forming a gypsum board, including calcined gypsum, an adhesion aid, a hardening accelerator, a foam for reducing the weight, other additives, and an admixture and water. Including.

In a preferred embodiment of the present invention, the foam supply port provided in the upper lid (upper plate) of the housing is a liquid or a foam so that the foam is uniformly mixed in the slurry and defoaming is suppressed. It is positioned on the downstream side in the rotation direction of the water supply port. In another preferred embodiment of the present invention, a plurality of toothed portions are arranged between a central region in the housing and an annular wall on the outer circumference of the housing,
The tooth profile is formed in the outer peripheral area of the rotary disk. The components to be kneaded move outward on the rotating disk by the action of centrifugal force while being stirred and mixed, and the sludge is an outer peripheral region where the sludge that has been substantially mixed stays (hereinafter referred to as sludge retention region).
Is introduced into the slurry feed opening through the space between the rotating tooth profiles. Further, the position of the sludge feed port is arranged on one or both of the bottom lid (lower plate) or the annular wall of the housing located in the sludge retention region, and the number of the sludge feed port is the purpose or use, or It is set appropriately according to the design conditions. For example, the slurry feeding port can be provided in the housing at one location or at two or more locations. In addition, when arranging the sludge feeding port in the bottom lid or the lower plate located in the sludge retention area, the tooth profile is an essential component of the rotating disk, but in the case of providing the discharge port on the annular wall, It is possible to omit the tooth profile.

Further, the aforesaid dispensing port is a portion of the housing located in the sludge retention area, that is, an upper lid or an upper plate, a bottom lid or a lower plate,
Alternatively, it can be preferably arranged on the annular wall, and
The number of collection ports is not limited to one, but two or more collection ports can be provided depending on the purpose, application or design conditions (however, if the collection ports are provided on the bottom lid or the lower plate). ,
It is necessary to form a tooth profile on the outer circumference of the turntable). The sludge taken out from the collection port is, for example, a material for the edge core material (core) of the gypsum board, a material for coating the adhesive surface of the base paper for the gypsum board, or a surface layer material or coating for the core material of the gypsum board. It can be used as a material. According to a preferred embodiment of the present invention, the upper lid of the housing is provided with an annular partition wall that hangs down to the vicinity of the upper surface of the rotary disk, and the annular partition wall is a sludge retention area on the outer periphery of the rotary disk and a central area of the rotary disk. To define unmixed sludge and mixed sludge. As a result, a uniform sludge having a large specific gravity can be reliably obtained from the outer peripheral area of the mixing stirrer. When the destination of the sludge or the portion to be supplied is separated from the mixing agitator, a pump for feeding or pressure feeding is arranged in a pipe line communicating with the collection port, and the sludge is used or the portion to be supplied. It may be pressure fed to the supply unit.

Further, the constitution of the mixing stirrer of the present invention can be applied to both conventional pin type mixers and pinless mixers (for example, blade type mixers). Further, the purpose of use of the mixing stirrer of the present invention is not limited to the mixer for producing gypsum board, and it can be used as a mixing stirrer of solid matter such as powder, liquid and foam in other fields.

[0010]

[Function] The specific gravity of sludge is mainly determined by the amount of bubbles mixed in, excluding the factor of the amount of mixed water. Therefore, according to the mixing stirrer having the above-mentioned configuration, the sludge can be partially discharged to the outside of the machine before being mixed with bubbles and can be fed to a desired portion, for example, the edge region of the lower paper of the gypsum board. Therefore, it is possible to supply two kinds of sludge, that is, a slurry having a high specific gravity with a small amount of bubbles mixed therein and a slurry having a low specific gravity with a large amount of mixed bubbles, as desired, with a single mixing stirrer. According to such a mixing stirrer, the specific gravity of the sludge can be adjusted without using a sub mixer to obtain the sludge of high specific gravity and without adding a retarder to the sludge. Therefore, it becomes possible to omit the installation of the auxiliary mixer, which has been conventionally required, and the maintenance and inspection work of the device or equipment can be greatly simplified. Further, by providing a second foam supply port for supplying foam to the sludge fed from the supply port to the outside of the machine, the amount of foam mixed inside the mixing agitator and the amount of foam mixing outside the mixing agitator are relatively free. Therefore, it is possible to easily obtain two kinds of sludge having an arbitrary specific gravity between the highest specific gravity and the lowest specific gravity with a single mixing stirrer. Furthermore, when the foam is introduced into the central area of the mixing stirrer, the foam disappears considerably due to the impact of the stirring action before being discharged from the feed opening, but as described above, By incorporating bubbles into the sludge of the tube, the amount of bubbles used can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a process explanatory view partially and schematically showing a molding process of a gypsum board. The lower paper 1 of the gypsum board base paper is conveyed along the production line. A mixing stirrer or kneader (hereinafter referred to as a mixer) 10 is arranged at a predetermined position associated with the transfer line, for example, above the transfer line. Powder such as calcined gypsum, adhesion aid, hardening accelerator, additive, admixture, foam, and liquid (water) are supplied to the mixer 10, and the mixer 10 kneads these raw materials to form the conduits 12, 14 The sludge (calcined gypsum slurry) 3 is supplied onto the lower paper 1 via the. The pipeline 14 is
Piping is provided so that the sludge 3 is discharged to the central region of the lower paper 1 in the width direction. On the other hand, the pipe line 12 includes a pair of pipes 12a, 12
Each of the pipes 12a and 12b including b discharges the sludge 3 to both end portions (edge regions) in the width direction of the lower paper 1. The lower paper 1 is transported together with the sludge 3, and the pair of forming rollers 1
Reach 6,16. The upper paper 2 partially orbits the outer circumference of the upper roller 16 and is turned in the direction of the conveying line. The turned upper paper 2 contacts the sludge on the lower paper 1 and is substantially parallel to the lower paper 1. Transferred in the transport line direction. Thus, a continuous laminate having a three-layer structure composed of the lower paper 1, the slurry 3 and the upper paper 2 is formed, and the laminate reaches the rough cutting rollers 18 while curing. The rough cutting rollers 18 and 18 cut a continuous laminated body into a plate body having a predetermined length, and thus, a plate-like body obtained by coating a gypsum-based core with a gypsum board base paper, that is, a gypsum board. The raw material is formed. The roughly cut laminate is further passed through a dryer and forcedly dried, and then cut into a predetermined product length, thus producing a gypsum board product.

2 to 4 are a plan view, a perspective view and a partially cutaway perspective view of the mixer 10. In addition, FIG.
FIG. 6 is a vertical sectional view of the mixer 10, and FIG.
It is a top view of the rotating disk arrange | positioned inside. 2 and 3
As shown in FIG. 1, the mixer 10 has a flat cylindrical casing or housing 20, and the casing 20 has a horizontal disc-shaped upper plate or upper cover 22 and a lower plate or bottom cover 2 which are spaced at a predetermined interval.
4 (hereinafter referred to as the upper plate 22 and the lower plate 24) and the outer peripheral wall or the annular wall 2 arranged on the outer peripheral portions of the upper plate 22 and the lower plate 24.
3 and 3. A circular opening 25 is formed at the center of the upper plate 22, and an enlarged lower end portion 31 of a vertical rotating shaft 30 penetrates the circular opening 25. The rotary shaft 30 is connected to a rotary drive device, for example, an electric motor (not shown). If desired, a transmission, for example, a speed change gear device or a belt type transmission is interposed between the rotary shaft 30 and the output shaft of the rotary drive device. On the upper plate 22, a powder supply pipe 40 for supplying components to be kneaded, a water supply pipe 42 for supplying kneading water, an internal pressure adjusting device 43 (shown by a broken line) for controlling an excessive increase in internal pressure, and further The first foam supply pipes 44 for supplying foam to the kneading component to adjust the volume are connected to each other at a predetermined angular interval. Further, a third foam supply pipe 41 for additionally supplying foam to the sludge in the inner region is connected to the upper plate 22.

The annular wall 23 is connected to the upper end of the slurry feeding pipe 48 via a hollow connecting portion 47. A second foam supply pipe 49 for supplying foam to the kneading component is connected to the slurry supply pipe 48. Preferably, the second foam supply pipe 49 is connected to the vicinity of the connecting portion 47 (in this example, the upper end of the slurry supply pipe 48) so that the bubbles introduced into the slurry are uniformly distributed in the slurry. It Further, the sorting port 46 is arranged on the annular wall 23,
The sorting port 46 includes a pair of sorting ports 46a and 46b. The sorting ports 46a and 46b are respectively arranged on the annular wall 23 at positions separated from the connecting portion 47 by a predetermined angular interval, and
a and 12b, respectively. Connection part 47 and collection port 4
6a and 46b are opened on the inner wall surface of the annular wall 23, and
It communicates with the inside of 0. The sorting ports 46a and 46b are arranged at an angle interval of a predetermined angle α, and the sorting port 46a and the sludge feeding pipe 48 located forward of the rotation direction are arranged at a predetermined angle β. . In addition, the first foam supply pipe 44
Are positioned within the angular range of the angle β at a predetermined angle γ from the sorting port 46a. As shown in FIGS. 4 and 5, a rotating disk 32 is rotatably arranged in the housing 20. The center of the rotating disk 32 is fixed to the lower end surface of the enlarged lower end 31 of the rotating shaft 30, and the center axis of the rotating disk 32 coincides with the rotating axis of the rotating shaft 30. Rotating disk 32
Rotates in the direction indicated by arrow R (clockwise direction) by the rotation of the rotary shaft 30.

The inner area of the housing 20 is divided into an inner area and an outer area by a virtual boundary 26. However, the upper plate 2
An annular partition wall that hangs from the lower surface of 2 may be provided in the housing 20 along the boundary 26. In this case, the annular partition wall is arranged substantially concentrically with the annular wall 23, and the inner region of the housing 20 has the wear-resistant ring 2 fixed to the inner wall surface of the annular wall 23.
It is clearly defined by an outer peripheral region located near 3a and an inner region located radially inward of the housing 20. A large number of tooth-shaped portions 37 are formed in the outer peripheral area of the rotating disk 32. As shown in FIG. 6, each tooth profile portion 37 has a rear end edge 37a extending substantially in the radial direction of the rotary disk 20 and a front end edge 37 inclined forward at a predetermined angle with respect to the rotational direction.
b. Each front edge 37b presses or biases the fluid to be kneaded outward in the rotational direction. As shown in FIGS. 4 to 6, two pins 36 are implanted on each tooth 37. Further, a plurality of pins 38 are arranged in the inner region, and the pins 38 are planted on the upper surface of the rotating disk 32 in a plurality of rows extending substantially in the radial direction. Each pin row 3
8 is the pin 3 on the toothed portion 37 from the outer periphery of the enlarged lower end portion 31.
6 are aligned on a curved line extending toward 6. As shown in FIG. 5, a plurality of pins 28 hanging from the upper plate 22
The pins 28 are arranged in the radial direction of the upper plate 22, and
8 are positioned respectively. Therefore, the pins 28 pass through the area between the pins 28 as the pins 38 move in the rotational direction. The pins 28 and 38 are detachably fixed to the rotary disk 32 and the upper plate 22 as needed, and the number of the pins 28 and 38 can be increased or decreased as desired.

Next, the operation of the mixer 10 will be described. Due to the operation of the rotary drive, the rotary disk 32 is moved to the arrow R.
The components to be kneaded in the mixer 10 are supplied through the powder supply pipe 40, and the kneading water is supplied to the water supply pipe 4.
2 via. The kneading components and the feed water are introduced into the inner region of the mixer 10, are stirred and mixed, and are moved outward on the rotating disk 32 by the action of the centrifugal force to move beyond the boundary 26 to the outer peripheral region. The required amount of foam is the first
It is supplied to the outer peripheral region via the foam supply pipe 44 (FIG. 2) and mixed with the kneading component in the outer peripheral region. The sludge having a relatively low specific gravity in which bubbles are mixed is pushed outward and forward in the rotational direction by the toothed portion 37, and is introduced into the sludge feeding pipe 48 via the connecting portion 47. The pin 36 on the toothed portion 37 scrapes off the sludge adhered to the inner peripheral surface of the wear resistant ring 23a,
Alternatively, scrape off. The sludge feeding pipe 48 communicates with the pipe line 14 (FIG. 1), and sludge having a relatively light specific gravity is discharged to the widthwise central region of the lower paper 1. If desired, the required amount of bubbles is supplied to the sludge supply pipe 48 via the second foam supply pipe 49, and the specific gravity of the sludge is further adjusted to a light specific gravity.

The sludge in the outer peripheral region is piped through respective collecting ports 46a and 46b arranged upstream of the first foam supply pipe 44 (rear in the rotation direction) and downstream of the connecting portion 47 (front in the rotation direction). Pipes 12a, 12 introduced into 12a, 12b
It is ejected to the edge area of the lower paper 1 (FIG. 1) via b.
The slurry near the dispensing port 46a is the slurry before reaching the first foam supply pipe 44, that is, the slurry before the bubbles are supplied, and the slurry at the dispensing port 46b is after mixing with the bubbles. It is a sludge that has been transported around the perimeter over a considerable area, resulting in the loss of a significant amount of bubbles. Therefore, the collection port 46
The sludge fed to the edge region via a and 46b has a relatively high specific gravity. Thus, the mixer 10 supplies the sludge having a relatively low specific gravity to the central region of the lower paper 1 through the sludge feed pipe 48 and the pipe line 14, and relatively through the sorting ports 46a and 46b and the pipe line 12. A high specific gravity sludge is supplied to each edge area of the lower paper 1. Therefore, gypsum board production line (Fig. 1)
The gypsum board raw material that is conveyed to the dryer by the method contains sludge of relatively light specific gravity in the central area and sludge of relatively heavy specific gravity in the edge area, so it is uniformly dried in the forced dryer on the downstream side of the transfer line. It As mentioned above, the mixer 10
Is a connection part 47 and a sludge feed pipe 48, a first foam supply pipe 44 for introducing foam for adjusting the sludge volume, and a first foam supply pipe 44.
A pair of aliquots 46a, 4 arranged on the upstream side (rotational direction rear side) and the downstream side of the connecting portion 47 (rotational direction front side) respectively.
6b, and the sludge feeding pipe 48 communicates with the pipe line 14 for discharging the sludge to the central region of the lower paper 1 and the sorting ports 46a, 46.
b communicates with the conduit 12 for discharging the sludge to the edge region of the lower paper 1. According to such a mixer 10, it is possible to adjust the sludge having a low specific gravity and the sludge having a high specific gravity by a single mixer and respectively supply the sludge of each specific gravity to a desired portion of the gypsum board production line. In addition, the use of the mixer 10 makes it possible to delay the curing of the edge region without using a curing retarder, and further, the maintenance work of the equipment is greatly simplified.

Further, bubbles can be additionally mixed into the sludge in the sludge feeding pipe 48 via the second foam feeding pipe 49. Further, the mixing of bubbles into the sludge in the outer peripheral region may be performed only by inputting from the first foam supply pipe 44 or the second foam supply pipe 49. In the above embodiment,
The mixer 10 includes two dispensing ports 46a and 46b, but for example, the dispensing port 46b may be omitted or not used,
It is also possible to branch the pipe line 12 communicating with the collection port 46a and supply the sludge to the left and right edge regions. Further, the collection port may be arranged on the upper plate 22 or the lower plate 24. In the above embodiments, the mixer 10 has been described as a pin type mixer. However, as one of ordinary skill in the art will readily appreciate, the arrangement of the present invention is equally applicable to other types of mixers, such as vane mixers with deflection vanes. Further, an additional foam supply pipe, for example, the third foam supply pipe 41 for supplying foam to the sludge in the inner region can be provided in the mixer 10 to additionally supply the foam to the sludge in the inner region. . In this case, the obtained different kinds of sludge are both lightweight and have a large difference in specific gravity, and are particularly suitable for manufacturing a lightweight gypsum board. Furthermore, via the third foam supply pipe 41 and the second foam supply pipe 49, it is possible to mix bubbles in the sludge in the central region and the discharged sludge in the sludge feed pipe 48, respectively. In this way, the foam is mixed into the sludge through the third foam supply pipe 41 and the second foam supply pipe 49, and, for example, the sludge specific gravity in the central region of the mixer 10 is 0.8 to
Mixed operating condition the mud漿比heavy set to 0.65~0.70gr / cm ³ of the discharge port of the set and the mixer 10 to 0.9gr / cm ^3, only bubbles the slip of the central region, the discharge slip As a result of comparison with the operating state in which the specific gravity of the same was set to the same value, the amount of bubbles used for adjusting the sludge volume was reduced by about 50%.

[0018]

As described above, according to the mixing stirrer and the mixing stirrer of the present invention, it is possible to supply stable and different kinds of sludge having a large difference in specific gravity with simple adjustment and a single mixing stirrer.

[Brief description of drawings]

FIG. 1 is a process explanatory view partially and schematically showing a molding process of a gypsum board.

FIG. 2 is a plan view of the mixer shown in FIG.

3 is a perspective view of the mixer shown in FIG. 1. FIG.

4 is a partially cutaway perspective view of the mixer shown in FIG. 1. FIG.

5 is a vertical cross-sectional view of the mixer shown in FIG.

FIG. 6 is a plan view of a rotating disk disposed in the mixer shown in FIGS. 2 to 5.

[Explanation of symbols]

 10 Mixer 12, 14 Pipe 12a, 12b Piping 20 Housing or Housing 22 Upper Plate or Upper Lid 23 Annular Wall 24 Lower Plate or Bottom Lid 30 Rotating Shaft 32 Rotating Disc 28, 36, 38 Pin 40 Powder Supply Pipe 41th 3 foam supply pipe 42 water supply pipe 44 first foam supply pipe 46, 46a, 46b collection port 47 connection part 48 sludge supply pipe 49 second foam supply pipe R rotation direction

Claims (13)

[Claims] 1. A flat and circular casing having an annular wall on the outer periphery, a supply port arranged in a central region of an upper plate of the casing for supplying a kneading material into the casing, and a casing of the casing. A sludge feeding port disposed in an outer peripheral region for continuously feeding sludge to the outside of the machine, a rotary disk rotatably arranged in the housing, and a rotary drive device for rotating the rotary disk, The kneading material is supplied to the upper region of the rotary disk through each of the supply ports, is stirred and mixed, and is moved radially outward on the rotary disk by the action of centrifugal force, from the slurry supply port. In the mixing stirrer fed to the outside of the machine, at least one dispensing port for taking out at least a part of the sludge is arranged in an outer peripheral area of the housing, and the sludge feeding device is located on the downstream side in the rotation direction of the dispensing port. In the outer peripheral area on the upstream side in the direction of rotation of the mouth, bubbles for adjusting the sludge volume are surrounded. Mixing agitator, characterized in that the foam supply port for supplying the mud whey is disposed. 2. The mixing according to claim 1, further comprising a second foam supply port for further supplying a foam for adjusting the volume of the sludge to the sludge fed from the feed port to the outside of the machine. mixer. 3. The mixing stirrer according to claim 2, wherein the second foam supply port is arranged in a sludge feed pipe communicating with the sludge feed port. 4. The mixing stirrer according to claim 1, wherein at least one of the sorting ports is arranged on the annular wall. 5. The mixing stirrer according to claim 1, wherein at least one of the dispensing ports is arranged on the upper plate of the housing. 6. A plurality of tooth profile portions are formed on an outer periphery of the rotary disk, and at least one of the sorting ports is arranged on a lower plate of a casing located below the tooth profile portions. The mixing stirrer according to claim 1. 7. The at least one sludge feeding port is arranged on an annular wall of the housing so as to feed the rest of the sludge fed from the collecting port to the outside of the machine. The external foam supply port for adjusting the sludge volume is arranged in the sludge feeding pipe communicating with the sludge feeding port.
The mixing stirrer according to any one of items 1 to 6. 8. A plurality of tooth profile portions are formed on an outer periphery of the turntable, and at least one of the slurry feeding ports is disposed on a lower plate of the housing located below the tooth profile portions. A sludge feeding pipe in which an external foam feeding port for adjusting the sludge volume is arranged is connected to the feeding port.
The mixing stirrer according to any one of items 1 to 6. 9. The at least one third foam supply port for further supplying a foam volume adjusting foam is provided in the central region downstream of the supply port for supplying the kneading material in the rotation direction. 9. The mixing stirrer according to any one of items 1 to 8 in the range. 10. A flat and circular casing having an annular wall on the outer periphery, a supply port arranged in the central region of the casing, and a slurry located in the outer peripheral region of the casing are continuously supplied to the outside of the machine. In a mixing and stirring method using a mixing and stirring machine equipped with a slurry feeding port for sending, a rotary disk rotatably arranged in the housing, and a rotary drive device for rotating the rotary disk, the components to be kneaded are , Is supplied to the upper area of the rotary disk through the supply port, the components are stirred and mixed, and are moved radially outward on the rotary disk by the action of centrifugal force, and a predetermined amount for sludge adjustment is provided. Bubbles are mixed in the slurry located in the outer peripheral area of the housing, and the mixed slurry is fed from the slurry feeding port to the outside of the machine, and the slurry is mixed from the collecting port before mixing the bubbles. And a method of mixing and stirring the method. 11. The mixing and stirring method according to claim 10, wherein bubbles for adjusting the volume of the sludge are further supplied to the sludge fed from the sludge feeding port to the outside of the machine. 12. The mixing according to claim 10 or 11, wherein bubbles for adjusting the volume of the slurry are further supplied to the slurry in the central region downstream in the rotation direction of the supply port for supplying the kneading material. Stirring method. 13. The mixing and stirring method according to claim 10, wherein the kneading material is a hydraulic material.