Mixing impeller and slurry manufacturing device

Abstract

To provide a mixing impeller and a slurry production apparatus which raises the height of a mixing interface between a solid material and a liquid material, and improve a mixing efficiency.SOLUTION: A mixing impeller includes an impeller body 21. A cavity extending to the tip is formed at the base end of the impeller body, and fluid passage holes 213 communicating with the cavity are formed on the side wall of the impeller body. The impeller body can rotate around its axis, and during the rotation, the solid material is transported from top to bottom along an external flow channel of the impeller body; and the liquid material is transported from bottom to top through the cavity in the impeller body, and the liquid material flows through the cavity and flows out of the fluid passage holes formed in the side wall of the impeller body to be mixed with the solid material. The mixing efficiency is improved by forming the cavity and the fluid passing holes in the impeller body, thereby raising a liquid level of the liquid material, and raising the height of a mixing interface between the solid material and the liquid material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of slurry production equipment, and more particularly to a mixing impeller and a slurry production equipment. [Background technology]

[0002] Slurry production equipment is widely used in industries such as pharmaceuticals, food, and chemicals. In the preparation process, liquids and solids are thoroughly mixed to obtain a pre-prepared mixture, which can improve the efficiency of subsequent processing.

[0003] In conventional devices, dispersion and mixing of solids and liquids are integrated into the same device, but with the conventional configuration, the interface between the solids and liquids is low, the contact area between the solids and liquids is small, and the contact time is short, resulting in a low degree of mixing of the solids and liquids and a decrease in mixing efficiency, which affects the efficiency of slurry production. Summary of the Invention

[0004] Therefore, the present invention provides a mixing impeller and a slurry manufacturing apparatus to overcome the drawbacks of the prior art, in which the solid-liquid interface is low, resulting in a low degree of mixing between the solid and the liquid and a reduced mixing efficiency.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A mixing impeller is provided, which includes an impeller body having a cavity formed at a base end of the impeller body and extending to a tip end thereof, and a fluid passage hole formed in a side wall of the impeller body and communicating with the cavity.

[0007] According to some embodiments of the present invention, there are a plurality of fluid passage holes, the plurality of fluid passage holes being spaced apart and formed around the side wall of the impeller body, and the fluid passage holes are formed in the side wall near the tip of the impeller body.

[0008] According to some embodiments of the present invention, the fluid passage holes are inclined along a direction from the inner wall to the outer wall of the impeller body, from the tip end of the impeller body to the base end of the impeller body.

[0009] According to some embodiments of the present invention, a baffle is provided in the impeller body above the fluid passage holes, and the baffle is inclined in a direction from the tip end to the base end of the impeller body.

[0010] According to some embodiments of the present invention, the fluid passage holes are formed along the radial direction of the impeller body.

[0011] According to some embodiments of the present invention, the fluid passage holes are inclined along a direction from the inner wall to the outer wall of the impeller body, from the base end of the impeller body to the tip end of the impeller body.

[0012] According to some embodiments of the present invention, the fluid passage holes are inclined from the inside to the outside and towards the same side along the direction opposite to the rotation direction of the impeller body.

[0013] According to some embodiments of the present invention, the fluid passage holes are circular holes, elliptical holes, polygonal holes, or flat holes.

[0014] In accordance with some embodiments of the present invention, the impeller body includes a cylindrical segment and a frustum segment smoothly connected to the cylindrical segment, with a large end of the frustum segment connected to the cylindrical segment and a cavity extending through the cylindrical segment and into the frustum segment.

[0015] According to some embodiments of the present invention, the fluid passage holes are provided in the sidewalls of the frustum segments.

[0016] In some embodiments of the present invention, the cavity is an annular cavity, the annular cavity being formed coaxially with the impeller body, or the cavity includes a plurality of spaced apart sub-cavities that collectively form the cavity.

[0017] According to some embodiments of the present invention, a plurality of blades are provided at intervals on an outer wall of an impeller body, and at least one fluid passage hole is provided in a region between two adjacent blades.

[0018] According to some embodiments of the present invention, a plurality of blades are spaced apart from one another on the outer wall of the impeller body, and both ends of the baffle abut the blades adjacent to the baffle on both sides.

[0019] The present invention further provides a slurry production apparatus, which includes a housing and the above-mentioned mixing impeller, wherein the mixing impeller is provided within the housing.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. In the mixing impeller of the present invention, the impeller body can rotate around its axis, and during rotation, solid materials such as powder are transported from top to bottom along the external flow path of the impeller body, and liquid materials are transported from bottom to top through cavities in the impeller body, where the liquid materials flow through the cavities and exit through fluid passage holes formed in the side walls of the impeller body to be mixed with the solid materials. By forming the cavities and fluid passage holes in the impeller body, the liquid level of the liquid material is raised, increasing the height of the mixing interface between the solid materials and the liquid materials, and further improving mixing efficiency.

[0022] 2. In the mixing impeller of the present invention, fluid passage holes are formed in the side wall at the tip of the impeller body, and the liquid material is transported from bottom to top, flows through the cavity, and flows out of the fluid passage holes, i.e., flows out from the side wall at the top of the impeller, thereby raising the mixing interface between the solid material and the liquid material. A plurality of fluid passage holes are formed at intervals, and when the impeller body rotates around its axis, the liquid material in the cavity is thrown off by centrifugal force from the plurality of fluid passage holes, which plays a dispersing role on the liquid material, thereby further improving the mixing efficiency of the solid material and the liquid material.

[0023] 3. In the mixing impeller of the present invention, the fluid passage holes are inclined from the tip to the base of the impeller body along the direction from the inner wall to the outer wall of the impeller body, forming an inclined surface in the contact area between the solid and liquid materials, which increases the contact area when the solids and liquid are mixed, improves the mixing efficiency of the solids and liquid, increases the speed of the solids being transported downward, reduces the probability of slurry return, improves the mixing quality of the solids and liquid, and improves the efficiency of slurry production.In addition, it also prevents lumps generated when the solid and liquid materials are mixed from clogging the fluid passage holes, which affects mixing efficiency.

[0024] 4. In the mixing impeller according to the present invention, when the fluid passage holes are inclined from the base end of the impeller body toward the tip end of the impeller body, or when the fluid passage holes are formed along the radial direction of the impeller body, a baffle is provided above the fluid passage holes, and the baffle is inclined from the tip end of the impeller body toward the base end, so that when solid material flows from top to bottom, the baffle acts as a blocking agent to cause the solid material to flow in a direction away from the outer wall of the impeller. This prevents clumps that form when the solid material and the liquid material are mixed from clogging the fluid passage holes and affecting mixing efficiency.

[0025] 5. In the mixing impeller of the present invention, the fluid passage holes are inclined in the direction from the base end of the impeller body to the tip end of the impeller body, along the direction from the inner wall to the outer wall of the impeller body, thereby increasing the height of the mixing interface between the liquid material and the solid material and further improving mixing efficiency.

[0026] 6. In the mixing impeller of the present invention, multiple sub-cavities jointly form a cavity, and as the impeller body rotates, the liquid material rotates in the multiple sub-cavities along with the impeller. As the liquid material rotates, it is dispersed by centrifugal force, which further increases the dispersion of the liquid material flowing out of the fluid passage holes and further improves the mixing efficiency of the solid material and the liquid material.

[0027] 7. In the mixing impeller according to the present invention, at least one fluid passage hole is provided in the region between the two blades, and the fluid passage hole is inclined from the inside to the outside in the direction opposite to the rotation direction of the impeller body and toward the same side. When the impeller body rotates around its axis, the liquid material in the cavity is driven to be thrown off from the fluid passage hole by the centrifugal force caused by the rotation, and is further dispersed after colliding with the blades, thereby more uniformly mixing the solid material and the liquid material, reducing the occurrence of lumps and improving mixing efficiency.

[0028] 8. In the slurry production apparatus of the present invention, the mixing impeller is mounted inside the housing, and the height of the mixing interface between the solid material and the liquid material in the slurry production apparatus is increased, thereby increasing the material supply speed and improving the slurry production efficiency. [Brief explanation of the drawings]

[0029] In order to more clearly describe the technical solutions of the embodiments of the present invention or the prior art, the drawings necessary for describing the embodiments or the prior art are briefly introduced below. Obviously, the drawings described are some embodiments of the present invention, and those skilled in the art can obtain other drawings from these drawings without creative efforts. [Figure 1]FIG. 1 is a schematic diagram illustrating the configuration of a mixing impeller according to some embodiments of the present invention. [Figure 2] FIG. 2 is a half-sectional view of the mixing impeller shown in FIG. [Figure 3] FIG. 3 is a schematic diagram illustrating a configuration of a mixing impeller in which the fluid passage holes are flat holes according to some embodiments of the present invention. [Figure 4] FIG. 4 is a schematic diagram illustrating a baffled mixing impeller configuration according to some embodiments of the present invention. [Figure 5] FIG. 5 is a half-sectional view of the mixing impeller shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view of a slurry production apparatus equipped with a mixing impeller according to some embodiments of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0031] In the description of the present invention, directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are directions or positional relationships indicated based on the drawings, and are merely intended to explain the present invention and simplify the description. They are not intended to indicate or imply that the indicated devices or elements necessarily have a specific orientation or are configured or operated in a specific direction, and therefore cannot be understood as limitations on the present invention. Furthermore, terms such as "first," "second," and "third" are used only for explanation, and cannot be understood as indicating or implying relative importance.

[0032] In describing the present invention, the terms "mounted," "connected," and "coupled" should be understood in a broad sense unless otherwise explicitly specified and limited. For example, they may be fixedly connected, detachably connected, or integrally connected. They may be mechanically connected or electrically connected. They may be directly connected, indirectly connected via an intermediate medium, or internally communicated between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0033] Furthermore, the technical features according to different embodiments of the present invention described below can be combined unless there is a contradiction.

[0034] As shown in Figures 1 to 5, the present invention provides a mixing impeller. The mixing impeller includes an impeller body 21. A cavity 214 extending to the tip is formed at the base end of the impeller body 21, and a fluid passage hole 213 communicating with the cavity 214 is formed in the side wall of the impeller body 21.

[0035] Specifically, the impeller body 21 can rotate around its axis, and during rotation, the solid material is transported from top to bottom along the external flow path of the impeller body 21, and the liquid material is transported from bottom to top through the cavity 214 in the impeller body 21, where the liquid material flows through the cavity 214 and out of the fluid passage holes 213 formed in the side wall of the impeller body 21, where it is mixed with the solid material. By forming the cavity 214 and the fluid passage holes 213 in the impeller body 21, the liquid level of the liquid material is raised, increasing the height of the mixing interface between the solid material and the liquid material, and further improving the mixing efficiency.

[0036] Referring to Figures 1 to 5, in some embodiments of the present invention, there are multiple fluid passage holes 213, and the multiple fluid passage holes 213 are spaced apart and formed around the side wall of the impeller body 21, and the fluid passage holes 213 are formed in the side wall near the tip of the impeller body 21.

[0037] More specifically, fluid passage holes 213 are formed in the side wall at the tip of impeller body 21, and liquid material is transported from bottom to top, flows through cavity 214, and is thrown off from fluid passage holes 213, i.e., flows out from the side wall at the top of the impeller, thereby raising the mixing interface between the solid material and the liquid material. A plurality of fluid passage holes 213 are formed at intervals, and when impeller body 21 rotates around its axis, the liquid material in cavity 214 is thrown off from the plurality of fluid passage holes 213 by centrifugal force, which acts to disperse the liquid material, allowing the solid material and liquid material to be mixed more uniformly and further improving the mixing efficiency of the solid material and liquid material.

[0038] Referring to FIG. 2, in some embodiments of the present invention, the fluid passage holes 213 are inclined in a direction from the inner wall to the outer wall of the impeller body 21, from the tip of the impeller body 21 to the base end of the impeller body 21.

[0039] Specifically, when the fluid passage holes 213 are inclined from the tip end of the impeller body 21 toward the base end of the impeller body 21, the liquid material flows downward after being shaken off from the fluid passage holes, and the solid material also flows downward, forming a mixing interface between the solid material and the liquid material as an inclined surface, which increases the contact area when the solid material and the liquid material are mixed, improves the mixing efficiency of the solid material and the liquid material, increases the speed at which the solid material is transported downward, reduces the probability of slurry returning, and improves the mixing quality of the solid material and the liquid material.In addition, it is possible to prevent lumps that form when the solid material and the liquid material are mixed from clogging the fluid passage holes 213 and affecting mixing efficiency.

[0040] Referring to Figures 4 and 5, in some embodiments of the present invention, a baffle 215 is provided above the fluid passage hole 213 in the impeller body 21, and the baffle 215 is inclined in a direction from the tip end to the base end of the impeller body 21.

[0041] Specifically, clumps are likely to occur during mixing of the solid material and the liquid material. If the fluid passing holes 213 are inclined in a direction from the base end of the impeller body 21 to the tip end of the impeller body 21, or if the fluid passing holes 213 are formed along the radial direction of the impeller body 21, the solid material and the liquid material come into contact with each other and are mixed in the fluid passing holes 213. If clumps occur, they tend to fall into the fluid passing holes 213 because they are too large, which can easily cause clogging of the fluid passing holes 213 and affect the supply of the liquid material.

[0042] A baffle 215 is provided above the fluid passage holes 213, and the baffle 215 is inclined in the direction from the tip to the base end of the impeller body 21, so that when the solid material flows from top to bottom, the solid material flows in a direction away from the outer wall of the impeller due to the blocking role of the baffle 215. This prevents the solid material and the liquid material from mixing in the fluid passage holes 213, that is, prevents the resulting lumps from clogging the fluid passage holes 213 and affecting mixing efficiency.

[0043] In some embodiments of the present invention, the fluid passage holes 213 are inclined in a direction from the base end of the impeller body 21 to the tip end of the impeller body 21 along a direction from the inner wall to the outer wall of the impeller body 21.

[0044] Specifically, the fluid passage holes 213 are formed so as to be inclined in the direction from the base end of the impeller body 21 to the tip end of the impeller body 21, thereby further increasing the height of the mixing interface between the liquid material and the solid material, thereby improving the mixing quality and increasing the mixing speed.

[0045] In some embodiments of the present invention, the fluid passage holes 213 are inclined from the inside to the outside and toward the same side along the direction opposite to the rotation direction of the impeller body 21 .

[0046] Specifically, in order to increase the degree of dispersion of the liquid material and better mix it with the solid material, the fluid passage holes 213 are provided in a direction from the inside to the outside, inclined toward the same side as the rotation direction of the impeller body 21, in the opposite direction to the rotation direction of the impeller body 21. When the impeller body 21 rotates around its axis, the flow direction of the liquid material is centrifugal force, and is the same direction as the centrifugal force, so the liquid material is easily shaken off from the fluid passage holes 213 and is dispersed. The higher the degree of dispersion of the liquid, the better the quality of mixing with the solid material.

[0047] In some embodiments of the present invention, the fluid passage holes 213 are formed along the radial direction of the impeller body 21 .

[0048] In some embodiments of the present invention, the fluid passage holes 213 are circular holes, elliptical holes, polygonal holes, or flat holes.

[0049] Specifically, referring to FIG. 3, the formation of flat holes is advantageous for dispersing the liquid material, increasing the degree of dispersion of the liquid material, and improving the mixing quality of the solid material and the liquid material.

[0050] 1-5, in some embodiments of the present invention, the impeller body 21 includes a cylindrical segment 212 and a frustum segment 211 smoothly connected to the cylindrical segment 212, the large end of the frustum segment 211 being connected to the cylindrical segment 212, and the cavity 214 extending through the cylindrical segment 212 and into the frustum segment 211.

[0051] In some embodiments of the present invention, the fluid passage holes 213 are provided in the sidewalls of the frustum segments 211 .

[0052] Specifically, the arrangement of the frustum segment 211 is advantageous for the downward transport of solid material, and the inclined sidewalls of the frustum segment 211 increase the supply rate of the solid material. The cylindrical segment 212 is provided below the frustum segment 211, thereby increasing the height of the impeller body 21. A cavity 214 penetrates the cylindrical segment 212 and the frustum segment 211, and a fluid passage hole 213 is formed in the sidewall of the frustum segment 211 and communicates with the cavity 214. When liquid material is transported from bottom to top, it flows through the cavity 214 and is shaken off from the fluid passage hole 213 in the sidewall of the frustum segment 211, and is mixed with the solid material on the sidewall of the frustum segment 211. The inclined sidewalls of the frustum segment 211 increase the area of ​​the mixing interface between the solid material and the liquid material, thereby increasing the supply rate of the material and improving mixing efficiency.

[0053] In some embodiments of the present invention, cavity 214 is an annular cavity, which is formed coaxially with impeller body 21, or cavity 214 includes a plurality of spaced apart sub-cavities that collectively form cavity 214.

[0054] Specifically, the role of the cavity 214 is to provide a temporary storage space for the liquid material. When the impeller body 21 rotates, the liquid material temporarily stored in the cavity 214 is thrown out of the fluid passage holes 213 by centrifugal force, thereby improving the degree of dispersion of the liquid material. When the cavity 214 is an annular cavity, the increased volume of the cavity 214 allows the liquid material to be sufficiently dispersed as it flows out, improving the quality of mixing of the liquid material and the solid material.

[0055] As can be seen, when the cavity 214 is composed of multiple sub-cavities, the liquid material flows from bottom to top into the multiple sub-cavities, and during rotation of the impeller body 21, the liquid material undergoes pre-dispersion within the sub-cavities and is dispersed again when it is thrown off from the fluid passage holes 213 by centrifugal force. The arrangement in which the sub-cavities jointly form the cavity 214 can increase the dispersion degree of the liquid material, thereby improving the mixing quality of the solid material and the liquid material and improving the mixing efficiency.

[0056] In some embodiments of the present invention, a plurality of blades 22 are provided at intervals on the outer wall of the impeller body 21, and at least one fluid passage hole 213 is provided in the region between two adjacent blades 22.

[0057] Specifically, the blades 22 can serve to guide the downward transport of solid material, and a flow path for transporting the solid material from top to bottom is formed between two adjacent blades 22. The fluid passage holes 213 are provided between two adjacent blades 22, i.e., in the flow path. During rotation of the impeller body 21, the fluid passage holes 213 are inclined from the inside to the outside along the opposite direction to the rotation direction of the impeller body 21 and toward the same side. When the impeller body 21 rotates around its axis, the liquid material in the cavity 214 is shaken off from the fluid passage holes 213 by centrifugal force and further dispersed after colliding with the blades 22, thereby more uniformly mixing the solid material and the liquid material, reducing the occurrence of lumps and improving mixing efficiency.

[0058] As can be understood, the number and diameter of the fluid passage holes 213 are not limited in the present invention, and the number and diameter of the fluid passage holes 213 are positively correlated with the flow rate of the liquid material, while the diameter of the fluid passage holes 213 is negatively correlated with the dispersion degree of the liquid material. The greater the number and diameter of the fluid passage holes 213, the faster the flow rate of the liquid material at a certain pressure of the driving pump. The fewer the number and diameter of the fluid passage holes 213, the slower the flow rate of the liquid material. Furthermore, the smaller the diameter of the fluid passage holes 213, the higher the dispersion degree of the liquid material. Therefore, the specific parameters of the number and diameter of the fluid passage holes 213 are selected and determined according to the properties of the liquid material and the pressure of the driving pump.

[0059] In some embodiments of the present invention, a plurality of blades 22 are spaced apart from one another on the outer wall of the impeller body 21, and both ends of the baffle 215 abut against the blades 22 adjacent to the baffle 215 on both sides.

[0060] Specifically, the baffle 215 may be provided so that both ends thereof abut against the two blades 22 adjacent to the baffle 215, or may be provided so as to cover only the diameter of the fluid passage hole 213, and therefore the width of the baffle 215 is not limited in the present invention. However, to prevent a large amount of solid matter from accumulating on the baffle 215 and affecting the efficiency of supplying solid material, the distance between the far end of the baffle 215 and the surface of the outer wall of the impeller body 21 needs to be smaller than the chord length of the blade 22.

[0061] 6, the present invention further provides a slurry production apparatus, which includes a housing 1 and the above-mentioned mixing impeller 2. The mixing impeller 2 is provided within the housing 1.

[0062] Specifically, a liquid inlet 11 is provided on the peripheral wall at the bottom of the housing 1, and the liquid material is injected through the liquid inlet 11. A liquid disperser 3 is provided at the bottom of the housing 1, and the liquid material is dispersed by the liquid disperser 3 and flows into the mixing impeller 2. A solid inlet 12 is provided at the top of the housing 1, and a solid disperser 4 is provided at the top of the housing 1, and the solid material is dispersed by the solid disperser 4 and flows into the mixing impeller 2. The dispersed liquid material enters the cavity 214 from the bottom of the impeller body 21 and is thrown off from the fluid passage holes 213 by centrifugal force, and the solid material is transported downward through the external flow path of the impeller body 21. The solid material and the liquid material are thoroughly mixed on the side wall at the top of the impeller body 21 and then flow out from the mixture outlet 13 on the side wall of the housing 1.

[0063] Liquid material enters through the liquid inlet 11, is dispersed by the disperser, and then flows upward by the drive pump. A guide plate is provided between the liquid disperser 3 and the mixing impeller 2 to guide the liquid into the impeller cavity 214. Solids are dispersed by the solid disperser 4 and then flow into the mixing impeller 2. As the mixing impeller 2 rotates, the blades 22 guide and push down the solid material, transporting it downward through the passage between two adjacent blades 22 and mixing it near the fluid passage holes 213. The mixing impeller 2 increases the height of the mixing interface between the solid and liquid, increasing the material feed rate and improving the efficiency of slurry production.

[0064] Obviously, the above examples are merely illustrative for the purpose of clarity and are not intended to limit the embodiments. Those skilled in the art can make other various changes or variations based on the above description. It is not necessary to list all examples here, and it is not possible to list all examples, but obvious changes or variations derived from the present embodiments still fall within the scope of protection of the present invention. [Explanation of symbols]

[0065] 1...Housing 2...Mixing impeller 3…Liquid dispersion device 4…Solid dispersion device 11…Liquid inlet 12…Solid inlet 13...Mixture outlet 21...Impeller body 22...Blade 211...frustum segment 212...Cylindrical segment 213...Fluid passage hole 214...cavity 215...Baffle

Claims

1. A mixing impeller including an impeller body (21), The mixing impeller is for mixing a solid and a liquid, A cavity (214) extending to the tip end is formed at the base end of the impeller body (21), and a fluid passage hole (213) communicating with the cavity (214) is formed in the side wall of the impeller body (21), The impeller body (21) includes a cylindrical segment (212) and a frustum segment (211) smoothly connected to the cylindrical segment (212), the large end of the frustum segment (211) is connected to the cylindrical segment (212), and the cavity (214) extends through the cylindrical segment (212) and into the frustum segment (211); The fluid passage hole (213) is provided in the side wall of the frustum segment (211). A mixing impeller characterized by:

2. The fluid passage holes (213) are plural, and the plural fluid passage holes (213) are spaced apart and formed around the side wall of the impeller body (21).

2. The mixing impeller according to claim 1.

3. The fluid passage hole (213) is inclined in a direction from the tip end of the impeller body (21) toward the base end of the impeller body (21) along a direction from the inner wall toward the outer wall of the impeller body (21).

2. The mixing impeller according to claim 1.

4. A baffle (215) is provided above the fluid passage hole (213) in the impeller body (21), and the baffle (215) is inclined in a direction from the tip end toward the base end of the impeller body (21).

2. The mixing impeller according to claim 1.

5. The fluid passage hole (213) is inclined in a direction from the base end of the impeller body (21) toward the tip end of the impeller body (21) along a direction from the inner wall toward the outer wall of the impeller body (21).

5. A mixing impeller according to claim 4.

6. The fluid passage hole (213) is formed along the radial direction of the impeller body (21).

5. A mixing impeller according to claim 4.

7. The fluid passage hole (213) is a circular hole, an elliptical hole, a polygonal hole, or a flat hole.

2. The mixing impeller according to claim 1.

8. The cavity (214) is an annular cavity, and the annular cavity is formed coaxially with the impeller body (21).

2. The mixing impeller according to claim 1.

9. The cavity (214) includes a plurality of spaced apart sub-cavities, the plurality of sub-cavities collectively forming the cavity (214).

2. The mixing impeller according to claim 1.

10. A plurality of blades (22) are provided at intervals on the outer wall of the impeller body (21), and at least one fluid passage hole (213) is provided in a region between two adjacent blades (22).

2. The mixing impeller according to claim 1.

11. A plurality of blades (22) are provided at intervals on the outer wall of the impeller body (21), and both ends of the baffle (215) are in contact with the blades (22) adjacent to the baffle (215) on both sides.

5. A mixing impeller according to claim 4.

12. A slurry production apparatus comprising a housing (1) and a mixing impeller (2) according to any one of claims 1 to 11, The mixing impeller (2) is provided in the housing (1). A slurry manufacturing apparatus characterized by:

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