Composite slurry spinning-breaking flow guide device and spinning-breaking flow guide method

Abstract

The invention belongs to a composite slurry spinning-breaking flow guide device and a spinning-breaking flow guide method. Comprising a slurry tank, a cover plate is arranged at the top of the slurry tank, a stirring unit used for stirring slurry in the slurry tank is arranged in the middle of the cover plate, a composite material feeding pipeline is arranged on one side of the cover plate, a discharging pipe is arranged on one side of the upper portion of the slurry tank, and a steam heating coil used for heating the composite slurry is arranged on the lower middle portion of the slurry tank. The inner wall of the slurry tank at the upper part of the steam heating coil pipe is provided with a fixed baffle plate for carrying out spinning breaking and flow guiding on the composite slurry, the inner upper part of the slurry tank is provided with a liquid level annular baffle plate for carrying out spinning breaking and flow guiding on the composite slurry, and the composite material feeding pipeline is arranged at the upper part of the middle of the liquid level annular baffle plate; the slurry mixing device has the characteristics that the slurry can be mixed more uniformly, each component material is easy to disperse uniformly, nutrients are more perfect, and the production efficiency and the product quality are favorably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of slurry tank accessory parts, and particularly relates to a composite slurry breaking and guiding device and a breaking and guiding method. BACKGROUND

[0002] The production of compound fertilizer involves many raw materials, and the adding amounts of the raw materials are different for different formulations. A slurry preparation device generally comprises a slurry tank with a stirring function. During production, the compound fertilizer raw materials are fed through the top of the slurry tank, and overflow out of the slurry tank through a discharge pipe on the upper side of the slurry tank. At the same time, a stirring unit stirs the slurry tank. The stirring paddle rotates in one direction at the bottom of the slurry tank. During the stirring and rotating process, the feeding and discharging form a blind area. In addition, the material flow mode during stirring is too single, which easily leads to insufficient stirring of the raw materials, causes uneven mixing of local nutrients, and affects the product quality. Especially, if the high-viscosity raw materials are not uniformly stirred, they will be caked, affect the slurry flowability, block the spray head, affect the granulation, and further affect the production efficiency of the compound fertilizer. SUMMARY

[0003] In order to make up for the above shortcomings, the application provides a composite slurry breaking and guiding device and a breaking and guiding method to solve the technical problems existing in the prior art.

[0004] The technical scheme adopted by the application to solve the technical problems is as follows:

[0005] A composite slurry breaking and guiding device, which comprises a slurry tank. A cover plate is arranged at the top of the slurry tank. A stirring unit for stirring the slurry in the slurry tank is arranged at the middle position of the cover plate. A composite material feeding pipe is arranged at one side of the cover plate. A discharge pipe is arranged at one side of the upper part of the slurry tank. A steam heating coil for heating the composite slurry is arranged at the middle and lower part of the slurry tank. A fixed baffle for breaking and guiding the composite slurry is arranged on the inner wall of the upper part of the steam heating coil. A liquid level annular baffle for breaking and guiding the composite slurry is arranged at the inner upper part of the slurry tank. The composite material feeding pipe is arranged at the upper part of the middle of the liquid level annular baffle.

[0006] The beneficial effects of the present application are: the traditional composite slurry is rotated and rises along the inner wall of the slurry tank under the action of the stirring unit; the present application changes the flow direction of the composite slurry and cooperates with the steam heating coil to heat the composite slurry, so as to reduce the viscosity and enhance the fluidity of the composite slurry, avoid the phenomenon of uneven mixing of the slurry caused by the stirring paddle rotating in one direction to form stirring cyclone, and specifically, the steam heating coil is arranged in the middle and lower part of the tank wall of the slurry tank, and the fixed baffle is arranged in the upper part of the tank wall of the slurry tank, so that the movement mode of the slurry can be changed during heating of the composite fertilizer material, and further, the liquid level annular baffle is arranged, so that the above-mentioned device cooperates to change the movement direction of the slurry under the action of shear stress, so as to realize the flow guiding of the slurry on the basis of breaking the cyclone of the slurry; the slurry mixing is more uniform, the component materials are easily and uniformly dispersed, the nutrients are more perfect, and the production efficiency and product quality are improved.

[0007] Preferably, a groove matched with the fixed baffle is formed in the position corresponding to the liquid level annular baffle, and a lifting part is arranged between the top of the liquid level annular baffle and the cover plate.

[0008] Preferably, the lifting part is a manual lifting part or an automatic lifting part.

[0009] Preferably, the manual lifting part is a screw rod fixed to the top of the liquid level annular baffle, the top end of the screw rod penetrates through the cover plate, and a lifting nut is sleeved on the screw rod at the upper part of the cover plate.

[0010] Preferably, the automatic lifting part is a pneumatic telescopic rod, an electric telescopic rod or a hydraulic telescopic rod, the fixed end of the automatic lifting part is connected with the lower surface of the cover plate, and the movable end of the automatic lifting part is connected with the top of the liquid level annular baffle.

[0011] Preferably, the liquid level annular baffle is composed of a plurality of sector baffles, a fastening connecting plate is arranged between adjacent sector baffles, and the lifting part is connected with the top of the fastening connecting plate; a plurality of round holes are formed in the surface of the sector baffle.

[0012] Preferably, a sawtooth baffle in an integral structure is arranged at the top of the outer wall of the sector baffle.

[0013] Preferably, an arc-shaped flow guide plate is arranged at the bottom of the sector baffle, the height of the arc-shaped flow guide plate close to the middle part of the slurry tank is greater than the height of the arc-shaped flow guide plate close to the side part, and a flow guide hole is formed in the surface of the arc-shaped flow guide plate.

[0014] Preferably, the stirring unit comprises a stirring motor arranged at the middle position of the top of the cover plate, a stirring shaft is arranged on the stirring motor, and the stirring shaft penetrates through the cover plate and is connected with the stirring paddle arranged at the bottom of the slurry tank.

[0015] A breaking and guiding method of a composite slurry breaking and guiding device, the guiding method comprises the following steps:

[0016] Step 1: The compound material enters the slurry tank through the compound material feeding pipe and the middle part of the liquid surface annular baffle; part of the material at the outlet of the compound material feeding pipe enters the upper part of the liquid surface annular baffle, when the material is in liquid phase, it enters the slurry tank through the circular holes on the surface of the fan baffle, and when the material is in solid phase, it enters the slurry tank by overflowing the compound slurry on the upper part of the fan baffle and cooperating with the circular holes;

[0017] Step 2: The stirring motor continuously rotates to drive the stirring paddle to rotate, which in turn drives the compound slurry to rotate and uniformly stir; the compound slurry enters the subsequent granulation equipment for granulation by overflow through the discharge pipe;

[0018] Step 3: In the process of rotating the compound slurry driven by the above-mentioned stirring paddle, the outer rotating compound slurry contacts the outer wall of the steam heating coil and the fixed baffle to destroy the rotational flow on the outer side of the compound slurry;

[0019] Step 4: In the process of rotating the compound slurry driven by the above-mentioned stirring paddle, the height of the liquid surface annular baffle is adjusted by the lifting part to make the arc guide vane in the liquid surface annular baffle contact the liquid surface of the compound slurry, which can destroy the rotational flow on the upper part of the compound slurry;

[0020] Step 5: The surface of the arc guide vane is provided with guide holes, and the impact between the upper compound slurry and the arc guide vane can enhance the stirring effect, and the compound slurry passing through the guide holes can increase the circumferential radial shear force, which can reduce the powder aggregation, sticky and hard lumps, melt material paddle liquid, and emulsify;

[0021] Step 6: Under the cooperation of steps 5 and 6, part of the compound slurry overflows to the upper part of the liquid surface annular baffle, which can reduce the flow deviation and stabilize the flow of the slurry through the sawtooth baffle; the compound slurry overflowing to the top of the fan baffle returns to the slurry tank through the circular holes and the middle part of the liquid surface annular baffle.

[0022] The composite material slurry breaking spiral guide device and the breaking spiral guide method made according to the above scheme can heat the composite fertilizer raw material, change the smooth characteristics of the inner wall of the traditional material slurry tank, break the spiral flow caused by stirring and increase the turbulent flow by arranging the steam heating coil and the fixed baffle; the liquid surface annular baffle can change the flow state of the upper layer of the material slurry, disperse the material slurry on the upper part of the composite fertilizer liquid surface, eliminate the air bubbles and distribute uniformly; further, the liquid surface annular baffle can avoid the problem of material sticking caused by the material slurry splashing to the inner wall of the material slurry tank and the inner lower part of the cover plate; the composite material slurry mixing is more uniform, the components of the material are uniformly dispersed, the nutrients are more perfect, the production efficiency and the product quality are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 It is a structural schematic diagram of the present application.

[0025] Figure 2 It is another structural schematic diagram of the present application.

[0026] Figure 3 It is a bottom view structural schematic diagram of the liquid surface annular baffle of the present application.

[0027] Figure 4 It is a top view structural schematic diagram of the liquid surface annular baffle of the present application.

[0028] Figure 5 It is a side view structural schematic diagram of the liquid surface annular baffle of the present application.

[0029] In the figure: 1, material slurry tank; 2, cover plate; 3, composite material feeding pipe; 4, discharging pipe; 5, steam heating coil; 6, fixed baffle; 7, groove; 8, lifting part; 9, screw rod; 10, lifting nut; 11, fan baffle; 12, fastening connecting plate; 13, sawtooth baffle; 14, arc-shaped guide plate; 15, stirring motor; 16, stirring shaft; 17, stirring paddle; 18, round hole; 19, guide hole. DETAILED DESCRIPTION

[0030] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application.

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application. Figures 1-5 The present application is further described in detail as follows. The present application is a kind of composite slurry breaking vortex flow guide device and breaking vortex flow guide method. The breaking vortex flow guide device comprises a slurry tank 1. A cover plate 2 is arranged at the top of the slurry tank 1. A stirring unit for stirring the slurry in the slurry tank 1 is arranged at the middle position of the cover plate 2. A composite material feeding pipe 3 is arranged at one side of the cover plate 2. A discharge pipe 4 is arranged at one side of the upper part of the slurry tank 1. A steam heating coil 5 for heating the composite slurry is arranged at the middle and lower part of the slurry tank 1. A fixed baffle 6 for breaking the vortex of the composite slurry is arranged on the inner wall of the slurry tank 1 at the upper part of the steam heating coil 5. A liquid level annular baffle for breaking the vortex of the composite slurry is arranged at the inner upper part of the slurry tank 1. The composite material feeding pipe 3 is arranged at the upper part of the middle of the liquid level annular baffle. The steam heating coil 5 can heat the middle and lower part of the composite slurry in the slurry tank 1, so as to melt and / or heat the slurry, thereby improving the flowability of the composite slurry. Further, the present application utilizes the principle that shearing can make the slurry thin. The outer wall of the steam heating coil 5 changes the characteristics of the smooth inner wall of the traditional slurry tank 1, which is easy to form a stirring vortex. The fixed baffle 6 arranged in cooperation with the steam heating coil 5 can provide shearing force for the slurry, break the vortex caused by stirring, and realize uniform mixing of the slurry while increasing the turbulent flow. Further, when the composite fertilizer material (the material refers to the raw material for producing composite fertilizer, which can be liquid material or solid material, such as slurry in a molten state or powder and granular raw material) enters the slurry tank 1 through the composite material feeding pipe 3, or the slurry rotates and touches the fixed baffle 6, the slurry will splash. The liquid level annular baffle can avoid the slurry from splashing onto the inner wall of the upper part of the slurry tank 1 to form a scar block, without affecting the stirring and the feeding of the composite slurry, thereby solving the problems of waste of raw materials and influence of the falling of the scar block on production. Meanwhile, the liquid level annular baffle can change the flow state of the upper layer of the slurry, disperse the slurry at the upper part of the liquid level of the composite fertilizer, eliminate bubbles, and distribute uniformly.

[0032] Further, the liquid surface annular baffle is provided with a groove 7 corresponding to the position of the fixed baffle 6, and a lifting part 8 is arranged between the top of the liquid surface annular baffle and the cover plate 2. The composite slurry liquid level in the slurry tank 1 changes constantly, and the lifting part 8 can be lifted or lowered according to the change of the composite slurry liquid level, so that the liquid surface annular baffle is always above the composite slurry liquid level, thereby achieving the characteristics of breaking the vortex and guiding the flow. Further, the fixed baffle 6 in the application can break the vortex of the slurry along the inner wall of the slurry tank 1, and has the positioning effect on the liquid surface annular baffle. When the liquid surface annular baffle is lifted or lowered with the lifting part 8, it also has the guiding effect. That is, preferably, the liquid surface annular baffle in the application can move up and down along the fixed baffle 6.

[0033] Further, the lifting part 8 is an artificial lifting part or an automatic lifting part. The artificial lifting part in the application refers to manually driving the liquid surface annular baffle to rise or fall, for example, using a steel wire rope, a steel wire rope and a pulley, a screw rod and a lifting nut, etc. The automatic lifting part refers to using electricity, compressed gas, hydraulic oil, etc. as driving force to drive the liquid surface annular baffle to rise or fall.

[0034] Further, the artificial lifting part is a screw rod 9 fixed to the top of the liquid surface annular baffle, the top end of the screw rod 9 penetrates through the cover plate 2, and a lifting nut 10 is sleeved on the screw rod 9 at the upper part of the cover plate 2. When the artificial lifting part is used, preferably, one end of the screw rod 9 is fixedly connected with the liquid surface annular baffle, the other end of the screw rod 9 penetrates through the cover plate 2, and the lifting nut 10 is sleeved on the end of the screw rod 9, so that the screw rod 9 drives the liquid surface annular baffle to rise or fall by rotating the lifting nut 10. The lifting process can be guided by the fixed baffle 6.

[0035] Further, the automatic lifting part is a pneumatic telescopic rod, an electric telescopic rod or a hydraulic telescopic rod, the fixed end of which is connected with the lower surface of the cover plate 2, and the movable end of which is connected with the top of the liquid surface annular baffle. In order to realize the stable lifting of the liquid surface annular baffle, two sets of lifting parts, three sets of lifting parts or four sets of lifting parts can be selected.

[0036] Further, the liquid surface annular baffle is composed of a plurality of sector baffles 11, fastening connecting plates 12 are arranged between adjacent sector baffles 11, and the lifting part is connected to the top of the fastening connecting plate 12; a plurality of circular holes 18 are arranged on the surface of the sector baffle 11. The liquid surface annular baffle in the application is composed of a plurality of sector baffles 11, and the above structure can realize the characteristic of convenient disassembly; the sector baffle 11 and the fastening connecting plate 12 are connected in a detachable manner (the detachable manner is a conventional detachable form, such as bolt connection, etc.). The lifting part and the fastening connecting plate 12 can be connected in a fixed manner or a detachable manner, such as welding, riveting, screwing, etc. The fastening connecting plate 12 can enhance the strength of the liquid surface annular baffle, and when the composite slurry liquid surface at the side of the slurry tank 1 is at a high position, the liquid surface baffle can increase the flow and prevent short circuit.

[0037] Further, the top of the outer side wall of the sector baffle 11 is provided with a sawtooth baffle 13 in an integral structure. The sawtooth baffle 13 can play a role of overflow, thereby reducing the bias flow, stabilizing the slurry flow, making the slurry distribution more uniform, and achieving the purpose of uniform discharge of the discharge pipe 4; the slurry overflowing to the top of the sector baffle 11 can flow back to the slurry tank 1 through the circular hole 18.

[0038] Further, the bottom of the sector baffle 11 is provided with an arc-shaped flow guide plate 14. Under normal circumstances, the composite slurry is in a state of low in the middle and high at the periphery under the action of the stirring unit, and the arc-shaped flow guide plate 14 can disperse the slurry rotating upward to this position, increase the shear, and push to the center. The height of the arc-shaped flow guide plate 14 close to the middle of the slurry tank 1 is greater than the height of the arc-shaped flow guide plate 14 close to the side, and the surface of the arc-shaped flow guide plate 14 is provided with a flow guide hole 19. The above height limitation of the arc-shaped flow guide plate 14 and the lifting part can level the liquid surface of the upper part of the composite slurry, so as to achieve the purpose of facilitating the slurry discharge; at the same time, the setting of the flow guide hole 19 can change the slurry flow from rotational flow to rotational flow plus radial flow tangential flow, increase the ring radial shear force, increase the slurry impact degree, enhance the stirring effect, reduce the powder aggregation, reduce the hard block of dry core, refine the molten material slurry, and further reduce the impact of the slurry on the arc-shaped flow guide plate 14, so as to achieve the characteristic of improving the service life of the arc-shaped flow guide plate 14.

[0039] Further, the stirring unit comprises a stirring motor 15 arranged at the middle position of the top of the cover plate 2, a stirring shaft 16 arranged on the stirring motor 15, and a stirring paddle 17 arranged at the bottom of the slurry tank 1 and connected to the stirring shaft 16 penetrating through the cover plate 2.

[0040] A breaking and guiding method of a composite slurry breaking and guiding device, the guiding method comprising the following steps:

[0041] Step 1: the compound fertilizer material enters into the slurry tank 1 through the compound material feeding pipe 3 and the middle part of the liquid surface annular baffle; when the material is in liquid phase, part of the material at the outlet of the compound material feeding pipe 3 enters into the slurry tank 1 through the circular holes 18 on the surface of the fan baffle 11; when the material is in solid phase, the compound slurry overflowing to the upper part of the fan baffle 11 enters into the slurry tank 1 through the circular holes 18; Step 2: the stirring motor 15 continuously rotates to drive the stirring paddle 17 to rotate, and the compound slurry is rotated and uniformly stirred; the compound slurry enters into the subsequent granulation equipment through the discharge pipe 4 for granulation; Step 3: in the process of rotating the compound slurry driven by the stirring paddle 17, the outer rotating compound slurry contacts with the outer wall of the steam heating coil 5 and the fixed baffle 6 to destroy the rotational flow of the outer side of the compound slurry; Step 4: in the process of rotating the compound slurry driven by the stirring paddle 17, the height of the liquid surface annular baffle is adjusted by the lifting part 8, so that the arc flow guide plate 14 in the liquid surface annular baffle contacts with the liquid surface of the compound slurry, and the contact can destroy the rotational flow of the upper part of the compound slurry; Step 5: the surface of the arc flow guide plate 14 is provided with flow guide holes 19, the impact between the upper compound slurry and the arc flow guide plate 14 can enhance the stirring effect, and the compound slurry passing through the flow guide holes 19 can increase the radial shear force, so as to destroy the rotational flow of the upper part of the compound slurry, reduce the powder aggregation, sticky and hard agglomerates, reduce the dry core hard agglomerates, and refine the molten material slurry; Step 6: under the cooperation of the above steps 5 and 6, part of the compound slurry overflows to the upper part of the liquid surface annular baffle, and the sawtooth baffle 13 can reduce the flow deviation and stabilize the flow of the slurry while the compound slurry overflows; the compound slurry overflowing to the top of the fan baffle 11 returns to the slurry tank 1 through the circular holes 18 and the middle part of the liquid surface annular baffle.

[0042] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A composite slurry breaking and guiding device, comprising a slurry tank (1), a cover plate (2) on the top of the slurry tank (1), a stirring unit for stirring the slurry inside the slurry tank (1) at the middle position of the cover plate (2), a composite material inlet pipe (3) on one side of the cover plate (2), and a discharge pipe (4) on one side of the upper part of the slurry tank (1), characterized in that: The lower middle part of the slurry tank (1) is provided with a steam heating coil (5) for heating the composite slurry, and the inner wall of the slurry tank (1) at the upper part of the steam heating coil (5) is provided with a fixed baffle (6) for breaking the rotation of the composite slurry, and the inner upper part of the slurry tank (1) is provided with a liquid surface annular baffle for breaking the rotation of the composite slurry, and the composite material feeding pipe (3) is arranged at the upper part of the middle of the liquid surface annular baffle.

2. The composite slurry de-swirling guiding device according to claim 1, characterized in that: The liquid surface annular baffle is provided with a matching groove (7) at the position corresponding to the fixed baffle (6), and the top of the liquid surface annular baffle is provided with a lifting part (8) between the cover plate (2).

3. A composite slurry de-rotating flow guiding device according to claim 2, characterized in that: The lifting part (8) is a manual lifting part or an automatic lifting part.

4. The composite slurry de-swirling guide according to claim 3, wherein: The manual lifting part is a screw rod (9) fixedly arranged at the top of the liquid surface annular baffle, the top end of the screw rod (9) penetrates through the cover plate (2), and a lifting nut (10) is sleeved on the screw rod (9) at the upper part of the cover plate (2).

5. The composite slurry de-swirling guide according to claim 3, wherein: The automatic lifting part is a pneumatic telescopic rod, an electric telescopic rod or a hydraulic telescopic rod, the fixed end of which is connected with the lower surface of the cover plate (2), and the movable end of which is connected with the top of the liquid surface annular baffle.

6. A composite slurry de-swirling device according to any one of claims 2 to 5, wherein: The liquid surface annular baffle is composed of a plurality of sector baffles (11), the adjacent sector baffles (11) are provided with fastening connecting plates (12), and the lifting part is connected with the top of the fastening connecting plate (12); a plurality of round holes (18) are formed in the surface of the sector baffle (11).

7. A composite slurry de-rotating flow guiding device according to claim 6, characterized in that: The top of the outer side wall of the sector baffle (11) is provided with an integral sawtooth baffle (13).

8. The composite slurry de-swirling guide according to claim 6, wherein: The bottom of the sector baffle (11) is provided with an arc-shaped flow guide plate (14). The height of the arc-shaped flow guide plate (14) close to the middle part of the slurry tank (1) is greater than the height of the arc-shaped flow guide plate (14) close to the side part, and the surface of the arc-shaped flow guide plate (14) is provided with a flow guide hole (19).

9. The composite slurry de-swirling guide of claim 1, wherein: The stirring unit comprises a stirring motor (15) arranged at the top middle position of the cover plate (2), a stirring shaft (16) arranged on the stirring motor (15), and a stirring paddle (17) arranged at the bottom of the slurry tank (1) and connected with the stirring shaft (16) penetrating through the cover plate (2).

10. A method of de-rotating a composite slurry de-rotation guiding device, characterized by: The flow guiding method comprises the following steps: Step 1: the composite fertilizer material enters into the slurry tank (1) through the composite material feeding pipe (3) and the middle part of the liquid surface annular baffle; when part of the material at the outlet of the composite material feeding pipe (3) enters into the upper part of the liquid surface annular baffle, the material in liquid phase enters into the slurry tank (1) through the round holes (18) in the surface of the sector baffle (11), and the material in solid phase enters into the slurry tank (1) through the composite slurry overflowing to the upper part of the sector baffle (11) and cooperating with the round holes (18); Step 2: the stirring motor (15) continuously rotates, the stirring motor (15) drives the stirring paddle (17) to rotate through the stirring shaft (16), and the composite slurry is rotated and uniformly stirred at the same time; the composite slurry enters into the subsequent granulation equipment for granulation in the form of overflow through the discharge pipe (4). Step 3: In the process of rotating the composite slurry driven by the rotating stirring paddle (17), the outer rotating composite slurry contacts the outer wall of the steam heating coil (5) and the fixed baffle (6) to destroy the outer rotating flow of the composite slurry; Step 4: In the process of rotating the composite slurry driven by the rotating stirring paddle (17), the height of the liquid surface annular baffle is adjusted by the lifting part (8) to make the arc guide vane (14) in the liquid surface annular baffle contact the liquid surface of the composite slurry, which can destroy the rotating flow of the upper part of the composite slurry; Step 5: The surface of the arc guide vane (14) is provided with a guide hole (19), and the impact between the upper composite slurry and the arc guide vane (14) can enhance the stirring effect, and the composite slurry passing through the guide hole (19) can increase the circumferential radial shear force, which can reduce the powder aggregation and sticky clumps, reduce the hard clumps of the dry core, and refine the molten material slurry; Step 6: Under the cooperation of the above steps 5 and 6, part of the composite slurry overflows to the upper part of the liquid surface annular baffle, and the sawtooth baffle (13) can make the composite slurry overflow while reducing the flow deviation and stabilizing the flow of the slurry; the composite slurry overflowing to the top of the fan baffle (11) returns to the slurry tank (1) through the round hole (18) and the middle part of the liquid surface annular baffle.

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