Mixing treatment device for mica paper pulp

Abstract

The invention relates to the technical field of mixing equipment, in particular to a mixing treatment device for mica paper pulp. The device comprises a stirring kettle, wherein a gas collecting hood is fixedly connected to the axis of the inner bottom wall of the stirring kettle; an inner cavity is defined by the inner side wall of the gas collecting hood and the inner bottom wall of the stirring kettle, an outer cavity is defined by the outer side wall of the gas collecting hood and the inner side wall of the stirring kettle, the inner cavity is communicated with the outer cavity, a sucking and lifting mechanism is coaxially arranged in the inner cavity, and a homogenizing acceleration mechanism is coaxially arranged at the top of the gas collecting hood. The sucking and lifting mechanism comprises a suspended sucking piece and a lifting blade fixedly connected to the top of the sucking piece, and the homogeneous acceleration mechanism comprises a speed change sleeve fixedly connected to the top of the gas collecting hood and a mounting sleeve coaxially arranged at the axis of the speed change sleeve; paper pulp enters the second channel with the narrowed width through the first channel and then is subjected to secondary acceleration. And the paper pulp is prevented from being blocked inside due to loss of driving force for lifting the blades after entering the extrusion gap.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and more specifically, to a mixing and processing apparatus for mica pulp. Background Technology

[0002] Mica paper, as a type of inorganic non-metallic specialty paper, possesses excellent high-temperature resistance, high-pressure resistance, superior insulation properties, and strong chemical stability, making it widely used in electrical insulation, high-temperature industries, aerospace, and building fire protection. Its preparation typically employs a process of "raw material pretreatment + fiber dissociation + mixing treatment + molding and drying." The mixing treatment involves using dissociated mica fiber slurry as raw material, supplemented with specialized chemical additives, to address the defects of mica fibers—such as strong inertness, easy agglomeration, and lack of natural binding properties—through physical dispersion and chemical modification.

[0003] Currently, to improve the efficiency and quality of mixing mica fibers with chemical additives, modern processes employ specialized mixing equipment. For example, utility model patent CN223454248U discloses a mica pulp mixing device. This device has an outer casing and an impeller arranged sequentially from top to bottom on the outer periphery of the stirring shaft. The outer casing consists of an upper tube and a lower gas collecting hood. The impeller drives the mica pulp below the gas collecting hood to move upwards, passing through the narrow gap between the stirring shaft and the tube. This evenly distributes the previously agglomerated and interwoven mica fibers, which lack natural binding properties, in the pulp, giving them stable bonding properties so they can better adhere to paper to form mica paper.

[0004] Although the mixing device disclosed in the aforementioned patent has the function of homogenizing mica fibers, it is prone to the following problems in actual use:

[0005] 1. The gas collecting hood has through holes for the mica fiber slurry (hereinafter referred to as "material") to pass through. These through holes allow material above the gas collecting hood to reach below it, and material below the gas collecting hood to pass through the through holes to reach above it. Since the through holes are located below the gap between the stirring shaft and the tube, and the diameter of the through holes is larger than the width of the gap, the material must overcome both its own weight and the viscosity of the narrow gap to pass through it. Therefore, when the impeller drives the material upwards, the material below the gas collecting hood will preferentially choose to pass through the through holes to reach the outside of the gas collecting hood, rather than the path of "moving upwards through the gap between the stirring shaft and the tube."

[0006] 2. As for the mica fiber slurry entering the gap, its flow rate decreases with increasing height, which can cause the fibers in the mica slurry to become clogged within the gap. Moreover, the slurry fibers entering the gap are sprayed directly from the top of the sleeve, and the sprayed water column directly impacts the agitation structure at the top: on the one hand, this will shorten the service life of the agitation structure due to long-term erosion; on the other hand, the direct mechanical impact can easily cause the mica fibers to break.

[0007] The aforementioned problems all contribute to a decrease in the homogenization effect of mica fibers, resulting in the fibers still lacking strong binding properties, which is detrimental to the preparation of mica paper in subsequent processes. Therefore, there is an urgent need to propose a mica pulp mixing and processing device to improve upon these shortcomings. Summary of the Invention

[0008] This invention provides a mixing and processing device for mica pulp, which solves the problem in the prior art that when mica pulp is driven upward through a homogenizing channel by an impeller, the pulp preferentially chooses the path with less resistance rather than the homogenizing channel with greater resistance.

[0009] To achieve the above objectives, the mica pulp mixing and processing device includes a mixing tank, and a gas collection hood is fixedly connected to the axial center of the bottom wall of the mixing tank.

[0010] The inner wall of the gas collecting hood and the inner bottom wall of the mixing vessel form an inner cavity, and the outer wall of the gas collecting hood and the inner wall of the mixing vessel form an outer cavity. The inner and outer cavities are kept in communication. A suction and lifting mechanism is coaxially arranged inside the inner cavity, and a homogenization and acceleration mechanism is coaxially arranged on the top of the gas collecting hood. The suction and lifting mechanism includes a suction element suspended in the air and a lifting blade fixedly connected to the top of the suction element. The homogenization and acceleration mechanism includes a speed-changing sleeve fixedly connected to the top of the gas collecting hood and a mounting sleeve coaxially arranged at the axis of the speed-changing sleeve. An extrusion gap is formed between the mounting sleeve and the speed-changing sleeve. A steering mounting block is fixedly connected to the top of the mounting sleeve, and the radius of the steering mounting block is larger than the radius of the mounting sleeve. The top of the speed-changing sleeve and the bottom of the steering mounting block form a steering channel, which is perpendicular to the extrusion gap.

[0011] The height of the suction member is higher than the height of the connection between the inner cavity and the outer cavity. The suction member generates suction at the bottom to attract the pulp at the bottom and throw it out radially. The lifting blade is used to drive the pulp inside the inner cavity upward into the extrusion gap. Along the direction from low to high, the width of the extrusion gap first gradually decreases and then gradually increases.

[0012] In the above technical solution, the setting of the diversion channel guides the mica pulp, which originally flows axially, to smoothly change to flow radially. The advantage of this setting is that it not only avoids the breakage of mica fibers due to high-speed impact, but also allows the pulp to flow freely in all 360° directions as it exits the diversion channel, preventing the impact point from concentrating near a single point. This allows the pulp to diffuse outwards within the mixing tank, forming a radial impact flow and breaking up local flow field blind zones within the mixing tank. The radial diffusion flow exiting along the diversion channel can cause secondary disturbance to the nearby untreated pulp, promoting material exchange between the center and edge areas of the mixing tank and preventing the edge pulp from agglomerating and accumulating due to insufficient mixing.

[0013] In this application, by positioning the suction element above the connection between the inner and outer cavities, the suction effect at the bottom of the suction element forces a lifting force onto the pulp at the bottom of the inner cavity, preventing material accumulation. Simultaneously, the lifting blades at the top of the suction element continue the lifting action, applying a spiral lifting force to the lifted mica fibers, ensuring that a sufficient amount of mica fibers follow the pulp and continuously enter the extrusion gap, thereby straightening and unfurling the previously agglomerated mica fibers.

[0014] Based on this, a stirring shaft is rotatably connected to the center of the stirring vessel, the steering mounting block is fixedly connected to the stirring shaft, and multiple stirring blades are fixedly connected to the outer periphery of the steering mounting block.

[0015] The suction element is fixedly connected to the bottom of the stirring shaft, and the lifting blade is coaxially connected to the lower part of the stirring shaft.

[0016] The inner cavity and the outer cavity are connected by multiple circulation holes on the gas collection hood. The multiple circulation holes are arranged in a ring array. The top of the stirring vessel is connected to a liquid inlet pipe, and the inner bottom wall of the stirring vessel is connected to a vent pipe. The vent pipe is used to pump high-temperature steam into the inner cavity.

[0017] In another technical solution, the suction device includes an upper impeller and a lower impeller, the upper impeller is fixedly connected to the bottom of the stirring shaft, the lower impeller is located below the upper impeller, and a plurality of dispersing blades are fixedly connected between the upper impeller and the lower impeller.

[0018] An attraction groove is provided at the center of the bottom of the lower blade disk, and the circulation hole is located below the attraction groove. The inner diameter of the gas collection hood gradually narrows from low to high.

[0019] Next, the radius of the lifting blades gradually narrows to fit the internal contour of the gas collection hood, and the spiral direction of the lifting blades is used to lift the height of the pulp in the inner cavity.

[0020] With this design, when the upper impeller rotates synchronously with the stirring shaft, the pulp is thrown radially out by the dispersing blades under centrifugal force. At the same time, pulp needs to be replenished near the axis. Thus, the pulp below the lower impeller continuously flows through the suction trough and replenishes the space between the lower impeller and the dispersing blades.

[0021] In another technical solution, both the mounting sleeve and the steering mounting block are fixedly connected to the stirring shaft, and multiple extrusion protrusions are fixedly provided on the inner walls of both the mounting sleeve and the speed change sleeve, with the multiple extrusion protrusions distributed spirally along the lifting blades.

[0022] An acceleration protrusion is fixedly connected to the middle section of the inner wall of the speed-changing sleeve, which is used to narrow the width of the extrusion gap in the middle section of the speed-changing sleeve. Along the direction from low to high, the extrusion gap is divided into channel 1, channel 2 and channel 3. The width of channel 1 and channel 3 is greater than the width of channel 2.

[0023] The turning channel is a turning groove, and the longitudinal section of the turning groove is a fan shape with an angle of 90°, which is used to make the pulp flowing out of the No. 3 channel smoothly turn along the arc surface of the turning groove.

[0024] In this technical solution, once the pulp enters the extrusion gap, its flow rate decreases as the height increases. The narrowing of the No. 2 channel accelerates the pulp, preventing mica fibers from clogging the extrusion gap.

[0025] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows:

[0026] 1. The pulp at the bottom of the inner cavity is drawn up by the suction groove. Once the pulp reaches the height of the bottom of the lifting blades, the lifting blades take over the lifting action of the suction element, driving the pulp to continue rising into the extrusion channel. The extrusion protrusions then break up the mica fiber agglomerates. This avoids the problem of disturbance dead zones at the edge of the mixing vessel when the pulp is driven to rise by the traditional stirring structure.

[0027] 2. After the pulp enters the narrower second channel through the first channel, it undergoes a second acceleration. This prevents the pulp from becoming clogged inside the extrusion gap due to the loss of driving force from the lifting blades. Finally, after being deflected by the deflecting groove, it flows from various angles to the outer cavity along the radial direction of the stirring shaft, completing one full homogenization cycle.

[0028] After multiple lifting and shearing processes, mica pulp with intact fiber length and excellent adhesion is finally obtained, which facilitates the subsequent production of qualified mica paper. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a perspective view of the overall structure of the present invention;

[0031] Figure 2 This is a partial cross-sectional perspective view of the present invention;

[0032] Figure 3 This is a partial sectional side view of the present invention;

[0033] Figure 4 This is a cross-sectional perspective view of the suction member of the present invention;

[0034] Figure 5 This is a diagram showing the positional relationship between the suction element and the circulation hole in this invention;

[0035] Figure 6 This is a side view illustrating the principle of the suction and lifting mechanism of the present invention;

[0036] Figure 7 This is a cross-sectional perspective view of the homogenization acceleration mechanism of the present invention;

[0037] Figure 8 This is a side view illustrating the principle of pulp velocity change within the gap between the mounting sleeve and the speed-changing sleeve in this invention.

[0038] The meanings of the labels in the diagram are as follows:

[0039] 100. Stirred vessel; 110. Liquid inlet pipe; 120. Vent pipe; 130. Stirring shaft; 131. Stirring paddle; 140. Gas collection hood; 141. Circulation hole;

[0040] 200. Suction and lifting mechanism; 210. Suction component; 211. Upper impeller; 212. Lower impeller; 213. Dispersion blade; 214. Suction groove; 220. Lifting blade;

[0041] 300. Homogenizing acceleration mechanism; 310. Mounting sleeve; 311. Extrusion protrusion; 320. Gearbox sleeve; 321. Acceleration protrusion; 330. Steering mounting block; 350. Steering groove. Detailed Implementation

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The gas collecting hood has through holes for material to pass through, allowing material above the hood to reach below it, and vice versa. When the impeller drives the material upwards, the resistance is significantly lower compared to material below the hood first moving upwards and then passing through the narrow gap between the stirring shaft and the tube. This direct passage through the through holes to the outside of the hood results in less resistance. Consequently, the fibers in the mica pulp are not effectively homogenized, leading to mica pulp that still lacks stable binding properties.

[0044] Please see Figures 1-3 In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a mixing and processing device for mica pulp. The mixing and processing device includes a stirring tank 100, and a gas collecting hood 140 is fixedly connected to the axial center of the bottom wall of the stirring tank 100.

[0045] The inner wall of the gas collecting hood 140 and the inner bottom wall of the stirring vessel 100 form an inner cavity, and the outer wall of the gas collecting hood 140 and the inner wall of the stirring vessel 100 form an outer cavity. The inner and outer cavities are in communication. A suction and lifting mechanism 200 is coaxially arranged inside the inner cavity, and a homogenization and acceleration mechanism 300 is coaxially arranged on the top of the gas collecting hood 140. The suction and lifting mechanism 200 includes a suspended suction member 210 and a lifting blade 220 fixedly connected to the top of the suction member 210. The homogenization and acceleration mechanism 300... It includes a speed change sleeve 320 fixedly connected to the top of the gas collection hood 140 and a mounting sleeve 310 coaxially disposed at the axis of the speed change sleeve 320. The mounting sleeve 310 and the speed change sleeve 320 form an extrusion gap. A steering mounting block 330 is fixedly connected to the top of the mounting sleeve 310, and the radius of the steering mounting block 330 is larger than the radius of the mounting sleeve 310. The top of the speed change sleeve 320 and the bottom of the steering mounting block 330 form a steering channel, which is perpendicular to the extrusion gap.

[0046] If no guiding structure is provided above the extrusion gap, allowing the pulp to be lifted and flow directly out along the axial direction of the mixing tank 100, the brittle mica fibers will directly impact the subsequent pipelines or the tank cover of the mixing tank 100, and the length characteristics required for fiber bonding will break due to continuous high-speed impact.

[0047] The diversion channel guides the mica pulp, which originally flows axially, to smoothly change its flow direction to radial. This design not only prevents mica fiber breakage due to high-speed impact, but also allows the pulp to flow freely in all 360° directions as it exits the diversion channel. This avoids the impact point being concentrated in one area, allowing the pulp to diffuse outwards within the mixing tank 100, forming a radial impact flow and breaking up localized flow field blind zones within the mixing tank 100. The radial diffusion flow exiting along the diversion channel can also cause secondary disturbance to the nearby untreated pulp, promoting material exchange between the center and edge areas of the mixing tank 100 and preventing the edge pulp from agglomerating due to insufficient mixing.

[0048] The height of the suction member 210 is higher than the height of the connection between the inner cavity and the outer cavity. The suction member 210 generates suction at the bottom to attract the pulp at the bottom and throw it out radially. The lifting blade 220 is used to drive the pulp inside the inner cavity upward into the extrusion gap. Along the direction from low to high, the width of the extrusion gap first gradually decreases and then gradually increases.

[0049] If the agitator blades are placed directly at the bottom of the mixing tank 100: on the one hand, only the mica fibers around the axis of the mixing tank 100 can be disturbed, and the mica fibers farther away from the axis experience weaker disturbances, with even a disturbance blind zone existing at the inner edge of the mixing tank 100; on the other hand, as the agitator blades drive the pulp upward, the driving force on the pulp weakens with increasing height, and the pulp preferentially flows out through channels with less resistance, such as the connection between the inner and outer cavities. Therefore, the amount of pulp flowing through the extrusion gap is limited, resulting in ineffective homogeneous dispersion of the mica fibers.

[0050] In this application, by positioning the suction member 210 above the connection between the inner and outer cavities, the suction effect at the bottom of the suction member 210 forces a lifting force onto the pulp at the bottom of the inner cavity, preventing material accumulation at the bottom of the inner cavity. Simultaneously, the lifting blades 220 at the top of the suction member 210 continue the lifting action, applying a spiral lifting force to the lifted mica fibers, ensuring that a sufficient amount of mica fibers follow the pulp and continuously enter the extrusion gap, thereby straightening and unfurling the previously agglomerated mica fibers.

[0051] To facilitate understanding of the above content, Figure 3 A side view of the mixing and processing device is shown. As shown in the figure, a stirring shaft 130 is rotatably connected to the axis of the stirring vessel 100, a steering mounting block 330 is fixedly connected to the stirring shaft 130, and multiple stirring paddles 131 are fixedly connected to the outer periphery of the steering mounting block 330.

[0052] Continue reading Figure 3 The suction element 210 is fixedly connected to the bottom of the stirring shaft 130, and the lifting blade 220 is coaxially connected to the lower part of the stirring shaft 130.

[0053] Mica fiber is an inorganic mineral fiber with a smooth surface and strong inertness. Even after high-pressure homogenization and dissociation, it is still easy to form fine agglomerates due to van der Waals forces, which are difficult to completely break down by mechanical stirring alone.

[0054] The inner cavity and the outer cavity are connected by multiple circulation holes 141 opened on the gas collection hood 140. The multiple circulation holes 141 are arranged in a ring array. The top of the stirred tank 100 is connected to the liquid inlet pipe 110. The inner bottom wall of the stirred tank 100 is connected to the vent pipe 120, which is used to pump high-temperature steam into the inner cavity.

[0055] In practice, mica pulp and dispersing agent are first injected into the mixing tank 100 through the inlet pipe 110 at the top of the mixing tank 100. The motor drives the stirring shaft 130, which is coaxially connected to its output shaft, to rotate. The stirring shaft 130 drives the stirring paddle 131 to rotate around the shaft, thereby stirring the mica pulp in the mixing tank 100. At the same time, high-temperature steam is pumped into the mica pulp through the vent pipe 120. After the steam bubbles are mixed into the pulp, they quickly vaporize, expand and burst to form local microjet streams, generating shear force on the agglomerates and breaking the bonding force between the fibers. Moreover, the pulp itself will also heat up after the high-temperature steam is continuously introduced, which will increase the thermal motion efficiency of the mica fibers and dispersing agent molecules, accelerate the adsorption rate of the dispersing agent on the surface of the mica fibers, and inhibit secondary agglomeration of the fibers.

[0056] Next, the suction member 210 draws up the pulp from the bottom of the inner cavity. Once the pulp reaches the height of the bottom of the lifting blade 220, the lifting blade 220 takes over the lifting action of the suction member 210, driving the pulp to continue rising into the extrusion gap. The extrusion gap breaks up the aggregated mica fibers through layered shearing action.

[0057] The suction component 210 includes, for example, Figure 4 The upper impeller 211 and lower impeller 212 are shown. The upper impeller 211 is fixedly connected to the bottom of the stirring shaft 130, and the lower impeller 212 is located below the upper impeller 211. Multiple dispersing blades 213 are fixedly connected between the upper impeller 211 and the lower impeller 212. When the upper impeller 211 rotates synchronously with the stirring shaft 130, the pulp is thrown radially out by the dispersing blades 213 under the action of centrifugal force. At the same time, pulp needs to be replenished near the axis. Therefore, the pulp below the lower impeller 212 continuously passes through the suction groove 214 and replenishes the space between the lower impeller 212 and the dispersing blades 213.

[0058] like Figure 5 As shown, an attraction groove 214 is provided at the center of the bottom of the lower blade disk 212, and the circulation hole 141 is located below the attraction groove 214. The inner diameter of the gas collection hood 140 gradually narrows from low to high.

[0059] Next, please refer to Figure 6 The radius of the lifting blade 220 gradually narrows to fit the internal contour of the gas collecting hood 140, and the spiral direction of the lifting blade 220 is used to lift the height of the pulp in the inner cavity.

[0060] It should be noted that after the mica pulp is added to the mixing tank 100, the pulp enters the inner cavity through the circulation hole 141. The fiber agglomerates in the pulp are affected by the high-temperature steam ejected from the vent pipe 120, which intensifies the molecular thermal motion rate, thereby breaking up the mica fibers. Then, the mica fibers are attracted through the suction groove 214 into the space between the upper blade 211 and the lower blade 212, and then radially ejected by the dispersing blade 213. After the mica fibers are lifted to the height of the lifting blade 220, the lifting blade 220 continues to drive the fibers upward until the fibers enter the extrusion gap.

[0061] For ease of understanding, in some embodiments, the shearing effect of the extrusion gap on the mica fiber agglomerates is achieved through extrusion protrusions 311 on the outer wall of the mounting sleeve 310 and the inner wall of the transmission sleeve 320. For example... Figure 7 As shown, the mounting sleeve 310 and the steering mounting block 330 are both fixedly connected to the stirring shaft 130. Multiple extrusion protrusions 311 are fixedly provided on the inner walls of the mounting sleeve 310 and the speed change sleeve 320. The multiple extrusion protrusions 311 are distributed along the spiral of the lifting blade 220.

[0062] If the narrowing point of the extrusion gap is located at the end, the shear force will be concentrated there, resulting in excessively high local shear strength and an increased breakage rate of brittle mica fibers. Simultaneously, the slurry passes rapidly through the narrowing zone at the end, and the agglomerates are subjected to only a single shearing event, leading to incomplete disintegration. Therefore, this application makes the following improvements to the narrowing point of the extrusion gap:

[0063] An acceleration protrusion 321 is fixedly connected to the middle section of the inner wall of the speed-changing sleeve 320. This protrusion narrows the width of the extrusion gap in the middle section of the speed-changing sleeve 320. Along the direction from low to high, the extrusion gap is divided into channel 1, channel 2, and channel 3. The widths of channels 1 and 3 are both greater than the width of channel 2. When the pulp enters the extrusion gap, its flow rate decreases as the height increases. The acceleration effect of the narrowed channel 2 on the pulp prevents mica fibers from clogging the extrusion gap.

[0064] exist Figure 8 In the middle, the turning channel is the turning groove 350. The longitudinal section of the turning groove 350 is a fan shape with an angle of 90°, which is used to make the pulp flowing out along the No. 3 channel smoothly turn along the arc surface of the turning groove 350.

[0065] By narrowing the middle section and widening the rear section of the extrusion gap as described above, that is, setting a second channel in the middle section and a third channel with an expanded gap in the rear section, the slurry accelerated in the second channel enters the shearing zone of the third channel. The expansion of space leads to a decrease in fluid pressure and the formation of strong radial vortices. The fine agglomerates that are not completely broken down are subjected to secondary shearing and impact in the vortex, which ultimately further reduces the agglomerate content.

[0066] The working principle of the mixing and processing device will be described in detail below:

[0067] First, mica pulp and dispersing agent are injected into the mixing tank 100 through the inlet pipe 110. The stirring shaft 130 drives the stirring paddle 131 to rotate around the shaft, stirring the mica pulp in the mixing tank 100. At the same time, high-temperature steam is pumped into the mica pulp through the vent pipe 120 to break up the mica fiber agglomerates in the pulp.

[0068] Next, the suction trough 214 draws up the pulp from the bottom of the inner cavity. Once the pulp reaches the height of the bottom of the lifting blade 220, the lifting blade 220 takes over the lifting action of the suction element 210, driving the pulp to continue rising into the first channel. The pulp is accelerated as it flows through the second channel, ensuring that the mica fibers do not cause blockage. During this process, the mounting sleeve 310 rotates synchronously with the stirring shaft 130, creating a speed difference with the stationary variable speed sleeve 320. The extrusion protrusions 311 on the side walls of both sleeves further break up the clumps of fibers.

[0069] After being accelerated in channel two, the pulp enters the shear zone of channel three. The increased space leads to a decrease in fluid pressure, creating strong radial vortices. Finally, the pulp in channel three, after being redirected by the deflector trough 350, flows radially along the stirring shaft 130 from various angles into the outer cavity, completing one cycle of homogenization. After a certain processing time, and through multiple cycles of the above process, a mica pulp with intact fibers, dispersion, and binding properties can be obtained.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixing and processing apparatus for mica pulp, comprising a mixing tank (100), wherein a gas collecting hood (140) is fixedly connected to the bottom wall of the mixing tank (100), characterized in that: The gas collecting hood (140) is used to divide the interior of the stirred tank (100) into an inner cavity and an outer cavity. A suction and lifting mechanism (200) is coaxially arranged inside the inner cavity. A homogenization and acceleration mechanism (300) is provided on the top of the gas collecting hood (140). The suction and lifting mechanism (200) includes a suction element (210) and a lifting blade (220). The homogenization and acceleration mechanism (300) includes a speed-changing sleeve (320) and an installation sleeve (310). An extrusion gap is formed between the mounting sleeve (310) and the transmission sleeve (320). A steering mounting block (330) is fixedly connected to the top of the mounting sleeve (310), and the radius of the steering mounting block (330) is larger than the radius of the mounting sleeve (310). The top of the transmission sleeve (320) and the bottom of the steering mounting block (330) form a steering channel. The height of the suction member (210) is higher than the height of the connection between the inner cavity and the outer cavity. The suction member (210) generates suction at the bottom to attract the pulp upward and throw it out radially. The lifting blade (220) is used to drive the thrown pulp upward into the extrusion gap. The width of the extrusion gap gradually decreases and then gradually increases in the direction from low to high to accelerate the pulp that has lost power. The turning channel is perpendicular to the extrusion gap and is used to disperse the landing point of the homogenized mica fibers.

2. The mica pulp mixing and processing apparatus according to claim 1, characterized in that: The stirring vessel (100) is rotatably connected to the axis of the stirring shaft (130), the steering mounting block (330) is fixedly connected to the stirring shaft (130), and a plurality of stirring paddles (131) are fixedly connected to the outer periphery of the steering mounting block (330).

3. The mica pulp mixing and processing apparatus according to claim 2, characterized in that: The suction component (210) is fixedly connected to the bottom of the stirring shaft (130), and the lifting blade (220) is coaxially connected to the lower part of the stirring shaft (130).

4. The mica pulp mixing and processing apparatus according to claim 2, characterized in that: The inner cavity and the outer cavity are connected by multiple circulation holes (141) on the gas collection hood (140). The multiple circulation holes (141) are arranged in a ring array. The top of the stirring vessel (100) is connected to a liquid inlet pipe (110), and the inner bottom wall of the stirring vessel (100) is connected to a vent pipe (120).

5. The mica pulp mixing and processing apparatus according to claim 4, characterized in that: The suction component (210) includes an upper impeller (211) and a lower impeller (212). The upper impeller (211) is fixedly connected to the bottom of the stirring shaft (130), and the lower impeller (212) is located below the upper impeller (211). Multiple dispersing blades (213) are fixedly connected between the upper impeller (211) and the lower impeller (212).

6. The mica pulp mixing and processing apparatus according to claim 5, characterized in that: The lower blade disk (212) has an attraction groove (214) at the center of its bottom. The circulation hole (141) is located below the attraction groove (214). The inner diameter of the gas collection hood (140) gradually narrows from low to high.

7. The mica pulp mixing and processing apparatus according to claim 1, characterized in that: The radius of the lifting blade (220) gradually narrows to fit the internal contour of the gas collection hood (140), and the spiral direction of the lifting blade (220) is used to lift the height of the pulp in the inner cavity.

8. The mica pulp mixing and processing apparatus according to claim 1, characterized in that: The mounting sleeve (310) and the steering mounting block (330) are both fixedly connected to the stirring shaft (130). The inner walls of the mounting sleeve (310) and the speed change sleeve (320) are both fixedly provided with multiple extrusion protrusions (311), which are distributed along the spiral of the lifting blade (220).

9. The mica pulp mixing and processing apparatus according to claim 1, characterized in that: An acceleration protrusion (321) is fixedly connected to the middle section of the inner wall of the speed-changing sleeve (320) to narrow the width of the extrusion gap in the middle section of the speed-changing sleeve (320). Along the direction from low to high, the extrusion gap is divided into channel 1, channel 2 and channel 3. The width of channel 1 and channel 3 is greater than the width of channel 2.

10. The mica pulp mixing and processing apparatus according to claim 9, characterized in that: The turning channel is a turning groove (350), and the longitudinal section of the turning groove (350) is a fan shape with an angle of 90°, which is used to make the pulp flowing out along the No. 3 channel smoothly turn along the arc surface of the turning groove (350).

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