Reaction kettle for refining zinc powder

Abstract

The invention relates to the technical field of reaction kettles, in particular to a zinc powder refining reaction kettle which comprises a kettle body, a conveying pipe is inserted in the middle of an inner cavity of the kettle body from top to bottom, a centrifuge is rotatably arranged at the lower end of the conveying pipe and comprises a base plate and a top cover, and a strip-shaped partition plate deviates from the radius direction of the top cover and is in an arc shape; the annular pipe is located on the upper side of the edge of the top cover, an annular plate is fixed to the surface of the annular pipe, and an annular notch is formed in the annular plate. The device has the beneficial effects that the centrifuge is arranged at the lower end of the conveying pipe and comprises the base plate and the top cover, the base plate and the top cover are both in a horn shape, the distance of the gap between the base plate and the top cover is gradually reduced from the center to the edge, the annular plate is fixedly arranged on the surface of the annular pipe, and compressed gas in the annular pipe can be sprayed out at a high speed through the annular notch; and the molten zinc is cooled and formed more quickly, the possibility of mutual adhesion due to viscosity is reduced, and it is guaranteed that the average particle size of the cooled and formed zinc powder is smaller, and the yield of fine powder is larger.

Description

Technical Field

[0001] The invention relates to the technical field of reactors, in particular to a reactor for refining zinc powder. Background Art

[0002] The preparation methods of zinc powder mainly include ball milling, gas atomization, reduction, electrolysis, plasma or laser. Each method has its own advantages and disadvantages. When choosing, it is necessary to make comprehensive considerations based on specific product requirements and production costs.

[0003] In the prior art, the gas atomization method is used to refine zinc powder, which is to spray molten zinc into a high-speed airflow through a nozzle in a reaction kettle, so that the zinc is broken into small droplets by the shear force and cooling effect of the airflow, and then quickly solidified into zinc powder in the air.

[0004] However, when the zinc melt is sprayed, some of the zinc melts adhere to each other due to viscosity and cannot be completely separated from each other. The average particle size of the zinc powder after cooling and forming is large, and the yield of fine powder is low. Therefore, the present invention provides a zinc powder refining reactor to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a reaction kettle for zinc powder refining, so as to solve the problem in the above-mentioned background technology that zinc melts adhere to each other due to viscosity, resulting in a larger average particle size of the zinc powder after cooling.

[0006] To achieve the above object, the present invention provides the following technical solution: a reaction kettle for zinc powder refining, comprising: A kettle body, wherein a feed pipe is inserted from top to bottom in the middle of the inner cavity of the kettle body, a centrifuge is rotatably arranged at the lower end of the feed pipe, the centrifuge comprises a bottom plate and a top cover, both of which are in the shape of a trumpet with opening downward, a gap is left between the bottom plate and the top cover, and the spacing of the gap gradually decreases from the center to the edge, a plurality of strip partitions distributed in a ring array are fixed between the bottom plate and the top cover, and the strip partitions are arc-shaped in the radial direction away from the top cover; An annular tube, wherein high-pressure gas passes through the inner cavity of the annular tube, the annular tube is located on the upper side of the edge of the top cover, an annular plate is fixed on the surface of the annular tube, and an annular incision is opened inside the annular plate, and the opening spacing of the annular incision gradually decreases from the inside to the outside, and a filter screen and a collection plate are arranged in sequence below the annular tube.

[0007] Preferably, the upper end of the top cover is fixedly connected to a hollow cylinder, an annular sleeve is fixed to the outside of the hollow cylinder, an annular bin is provided on the outer rotating sleeve of the annular sleeve, a plurality of air inlet channels distributed in an annular array are fixedly provided on the side wall of the annular bin, and the air inlet channels are tangent to the surface of the annular bin, and a plurality of notch grooves distributed in an annular array are opened on the side wall of the annular sleeve.

[0008] Preferably, an annular connecting frame is fixed to the upper surface of the annular bin, the outer fixed sleeve of the feed pipe is provided with a flange, and the flange and the annular connecting frame are fixedly connected by bolts, the upper end of the hollow cylinder movably passes through the upper inner wall of the annular bin and fits the lower end surface of the feed pipe, and the end of the air inlet channel is fixedly connected to a connecting pipe.

[0009] Preferably, the side wall of the annular warehouse is fixedly provided with a plurality of air outlet channels distributed in an annular array, and the air outlet channels are spaced apart from the air inlet channels, the inner wall of the air outlet channels is provided with air outlet holes, the surface of the air outlet channels is fixedly connected with connecting pipe 2, the lower end of connecting pipe 2 is fixedly connected to the annular pipe, and connecting pipe 2 is arc-shaped along the surface of the top cover in the radial direction deviating from the top cover.

[0010] Preferably, a kettle cover is fixedly connected to the upper opening of the kettle body by bolts, a sealing disk is provided in the middle of the kettle cover, an upper surface of the sealing disk is fixedly connected to an air supply pipe, an annular air passage is provided inside the edge of the sealing disk, the upper ends of a plurality of connecting pipes are connected to the inner cavity of the annular air passage, a sealing sleeve is fixedly provided in the middle of the sealing disk, and the upper end of the feed pipe passes through the inner cavity of the sealing sleeve and is fixedly connected thereto.

[0011] Preferably, the middle parts of the filter screen and the collecting plate are both recessed downwards, an inner collecting tube is fixedly provided through the middle part of the filter screen, an outer collecting tube is provided through the middle part of the collecting plate, the upper end of the outer collecting tube is fixedly connected to the filter screen, the outer collecting tube is sleeved on the outside of the inner collecting tube, and the two are concentric, and the lower ends of the outer collecting tube and the inner collecting tube both pass through the bottom of the kettle body and extend to the outside of the kettle body.

[0012] Preferably, a distribution box is provided under the kettle body, and an isolation plate is provided inside the distribution box. The inner cavity of the collecting inner tube and the inner cavity of the collecting outer tube are respectively connected with the inner cavities at both ends of the distribution box. The side walls of the collecting inner tube and the side walls of the collecting outer tube are provided with through grooves which are respectively flush with the upper surface of the filter screen and the upper surface of the collecting plate.

[0013] Preferably, a retaining ring is fixedly provided on the upper surface of the filter, and the retaining ring is facing the opening direction of the annular incision, a stepped groove is provided on the surface of the retaining ring, a vibration ring and a rotating ring are provided in the inner cavity of the stepped groove, and the rotating ring covers the upper surface of the vibration ring from top to bottom, the vibration ring is fixed to the retaining ring, and the rotating ring is rotatably installed in the inner cavity of the stepped groove.

[0014] Preferably, the upper surface of the vibration ring is provided with a plurality of grooves distributed in a circular array, the lower surface of the rotating ring is rotatably mounted with a rolling element, the upper surface of the rotating ring is fixedly provided with a plurality of vertical plates distributed in a circular array, and the length direction of the vertical plates is consistent with the radius direction of the kettle body.

[0015] Preferably, reinforcement frames are fixedly mounted on the lower surface of the filter screen and the lower surface of the collecting tray, and a plurality of gathering plates distributed in a circular array are fixedly mounted on the upper surface of the collecting tray, wherein the gathering plates are arc-shaped in a radial direction away from the collecting tray.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a centrifuge at the lower end of a feeding pipe, wherein the centrifuge comprises a bottom plate and a top cover, both of which are trumpet-shaped, the distance of the gap between the bottom plate and the top cover gradually decreases from the center to the edge, a strip partition is fixed in the gap, and the strip partition deviates from the radius of the top cover to be in an arc shape, the zinc melt is sprayed into the centrifuge from the lower end of the feeding pipe, the centrifuge rotates at a high speed and uses centrifugal force to spread the zinc melt into an annular film shape, an annular tube is installed at the edge of the centrifuge, an annular plate is fixedly arranged on the surface of the annular tube, and an annular incision is opened in the annular plate, the compressed gas inside the annular tube can be sprayed out at a high speed through the annular incision to form an annular air curtain, which is used to impact the annular film-shaped zinc melt, so that the zinc melt is cooled and formed more quickly, and the possibility of mutual adhesion due to viscosity is reduced, so as to ensure that the average particle size of the zinc powder after cooling and forming is smaller and the yield of fine powder is larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connection between the feed pipe and the centrifuge structure of the present invention; Figure 4 It is an exploded schematic diagram of the feed pipe and centrifuge structure of the present invention; Figure 5 It is a schematic cross-sectional view of the centrifuge structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the centrifuge of the present invention; Figure 7 This is a schematic diagram of the internal structure of the annular bin of the present invention; Figure 8 This is an enlarged schematic diagram of the structure at A in the figure of the present invention; Fig. 9 This is a schematic diagram of the explosion of the filter structure of the present invention; Fig.10 It is an exploded schematic diagram of the local structure of the rotating ring of the present invention; Fig.11 This is a schematic cross-sectional view of the collecting tray structure of the present invention.

[0018] In the figure: 1, kettle body; 2, kettle cover; 21, sealing plate; 211, annular airway; 212, sealing sleeve; 22, air delivery pipe; 3, feed pipe; 4, centrifuge; 41, bottom plate; 42, top cover; 43, strip partition; 44, hollow cylinder; 45, annular sleeve; 46, notch groove; 5, annular bin; 51, air inlet channel; 52, connecting pipe 1; 53, air outlet channel; 54, air outlet; 55, connecting pipe 2; 56, annular connecting frame; 6, annular pipe; 61, annular plate; 62, annular incision; 7, filter screen; 71, collecting inner pipe; 72, retaining ring; 73, stepped groove; 74, vibration ring; 75, rotating ring; 76, vertical plate; 77, rolling element; 78, reinforcement frame; 8, collecting plate; 81, collecting outer pipe; 82, gathering plate; 9, material distribution box. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 11 , the present invention provides a technical solution: Embodiment 1, a reaction kettle for zinc powder refining, comprises: a kettle body 1 and an annular tube 6.

[0021] Specifically, a feed pipe 3 is inserted from top to bottom in the middle of the inner cavity of the kettle body 1, and the upper end of the feed pipe 3 is connected to an external heater. The heater heats solid zinc to between 419.5°C and 906°C to make the zinc in a molten liquid state. The molten zinc is transported to the inner cavity of the kettle body 1 through the feed pipe 3. A centrifuge 4 is rotatably arranged at the lower end of the feed pipe 3. The centrifuge 4 includes a bottom plate 41 and a top cover 42, and both are in a trumpet shape with an opening downward. A gap is left between the bottom plate 41 and the top cover 42, and the spacing of the gap gradually decreases from the center to the edge. After the molten zinc is ejected from the lower end of the feed pipe 3, it enters the gap between the bottom plate 41 and the top cover 42 and flows from the middle of the gap to the edge. During the flow, the molten zinc gradually cools down to ensure that when the molten zinc flows to the edge of the gap between the bottom plate 41 and the top cover 42, its temperature is near the melting point (slightly greater than 419.5°C), so as to facilitate the subsequent cooling of the molten zinc to form zinc powder. Since the bottom plate 41 and the top cover 42 are in a disc-shaped structure, the molten zinc can be spread out in the gap between the bottom plate 41 and the top cover 42, so the feeding pipe 3 can transport a larger amount of molten zinc per unit time. Secondly, as the molten zinc flows toward the edge of the bottom plate 41, the distance between the bottom plate 41 and the top cover 42 gradually decreases, and the thickness of the molten zinc spread out gradually decreases. When the molten zinc is sprayed out from the edge of the gap, the molten zinc can be in the shape of an annular film. In addition, the centrifuge 4 itself can also rotate, and the centrifugal force of the centrifuge 4 during rotation can also throw the molten zinc out. Therefore, there is no need to provide excessive pressure inside the feeding pipe 3 to force the molten zinc to spray out at a high speed. Furthermore, since the bottom plate 41 and the top cover 42 have a larger surface area than the feed pipe 3, they can provide a relatively good heat exchange effect for the zinc melt, so that the zinc melt can be initially cooled down inside the centrifuge 4. As the rotation speed of the centrifuge 4 changes, the flow speed and flow time of the zinc melt between the bottom plate 41 and the top cover 42 are different. Therefore, by controlling the rotation speed of the centrifuge 4, the initial cooling time of the zinc melt inside the centrifuge 4 can be controlled, thereby avoiding the situation where the zinc melt solidifies inside the centrifuge 4 due to the temperature of the zinc melt being too low. In addition, a plurality of strip partitions 43 are fixed between the bottom plate 41 and the top cover 42 and are distributed in a circular array. The strip partitions 43 are arc-shaped and deviate from the radius of the top cover 42. The strip partitions 43 are used to separate the zinc melt between the bottom plate 41 and the top cover 42 into a plurality of independent parts, such as Figure 6 As shown, the distance between two adjacent strip partitions 43 gradually increases from the center to the edge of the top cover 42, while the distance between the bottom plate 41 and the top cover 42 gradually decreases. Therefore, the cross-sectional area of ​​the zinc melt between the two adjacent strip partitions 43 can be maintained substantially the same during the flow. However, as the zinc melt flows toward the edge of the bottom plate 41, the centrifugal force it is subjected to gradually increases. Therefore, a force that forces the zinc melts to move away from each other is generated between the zinc melts to offset the viscous force between the zinc melts. This reduces the possibility of a larger zinc powder particle size caused by the viscous force during the subsequent cooling and forming of the zinc melt. Secondly, high pressure gas is passed through the inner cavity of the annular tube 6, which is located on the upper side of the edge of the top cover 42. An annular plate 61 is fixed to the surface of the annular tube 6, and an annular cutout 62 is opened inside the annular plate 61, such as Figure 8 As shown, the high-pressure gas in the inner cavity of the annular tube 6 can be discharged from the annular cutout 62 to form a high-speed flowing air curtain. Figure 5It can be seen that the air curtain discharged from the annular incision 62 is located on the peripheral side of the annular thin-film zinc melt, and the flow directions of the two cross each other. Therefore, the high-speed gas discharged from the annular incision 62 can impact the zinc melt, thereby realizing the cooling and shaping of the zinc melt to obtain zinc powder. The opening spacing of the annular incision 62 gradually decreases from the inside to the outside, and the cross-section of the annular incision 62 is in a converging shape, which can be used to increase the flow rate of the gas during injection and improve the impact effect on the zinc melt. A filter screen 7 and a collection tray 8 are sequentially arranged below the annular pipe 6. The filter screen 7 is used to filter and separate unqualified zinc powder particles with large particle sizes, and the collection tray 8 is used to collect zinc powder with small particle sizes.

[0022] In order to drive the centrifuge 4 to rotate, the present application also has a hollow cylinder 44 fixedly connected to the upper end of the top cover 42. An annular sleeve 45 is fixed to the outside of the hollow cylinder 44. An annular chamber 5 is rotatably sleeved on the outside of the annular sleeve 45. The cross-section of the annular chamber 5 is in a "C" shape and semi-covers the annular sleeve 45. Only relative rotation occurs between the annular sleeve 45 and the annular chamber 5, and they will not separate from each other. The annular chamber 5 itself remains fixed. Therefore, the annular sleeve 45 can rotate and drive the entire centrifuge 4 to rotate accordingly. A plurality of air inlet channels 51 distributed in an annular array are fixedly arranged on the side wall of the annular chamber 5, and the air inlet channels 51 are tangent to the surface of the annular chamber 5. A plurality of notch grooves 46 distributed in an annular array are formed in the side wall of the annular sleeve 45. Combining Figure 7 As shown, the external high-pressure gas is sent into the inner cavity of the annular chamber 5 through the air inlet channels 51, and drives the annular sleeve 45 to rotate in the inner cavity of the annular chamber 5, thereby realizing the rotation of the centrifuge 4, and the rotation speed of the centrifuge 4 can be controlled by the pressure of the gas sent into the inner cavity of the air inlet channels 51.

[0023] In order to transport the zinc melt into the centrifuge 4, the present application also has an annular connecting frame 56 fixed to the upper surface of the annular chamber 5. A flange is fixedly sleeved on the outside of the feed pipe 3, and the flange is fixedly connected to the annular connecting frame 56 by bolts. As Figure 4 shown, the annular chamber 5 and the feed pipe 3 remain relatively fixed. The upper end of the hollow cylinder 44 movably penetrates the upper inner wall of the annular chamber 5 and fits the lower end surface of the feed pipe 3. Since the centrifuge 4 itself only rotates and will not separate from the annular chamber 5, the upper end opening of the hollow cylinder 44 can always be kept in a communicating and sealed state with the lower end of the feed pipe 3, thereby ensuring that the zinc melt in the inner cavity of the feed pipe 3 can be smoothly transported into the centrifuge 4. A connecting pipe 52 is fixedly connected to the end of the air inlet channel 51 for transporting high-pressure gas into the inner cavity of the air inlet channel 51.

[0024] In order to transport high-pressure gas into the inner cavity of the annular pipe 6, the present application also has a plurality of air outlet channels 53 distributed in an annular array fixedly arranged on the side wall of the annular chamber 5, and the air outlet channels 53 are spaced from the air inlet channels 51. Air outlet holes 54 are formed in the inner wall of the air outlet channels 53. As Figure 7As shown, the air inlet channel 51 delivers gas to the inner cavity of the annular chamber 5. After the gas rotates in the inner cavity of the annular chamber 5 and flows to the position of the air outlet channel 53, it can enter the inner cavity of the air outlet channel 53 and be discharged from the air outlet 54. Figure 4 As shown, a connecting pipe 2 55 is fixedly connected to the surface of the air outlet channel 53, and the lower end of the connecting pipe 2 55 is fixedly connected to the annular pipe 6. Figure 4 and Figure 7 As shown in the figure, the gas discharged from the gas outlet 54 is guided into the inner cavity of the annular tube 6 through the connecting pipe 2 55, and then combined with Figure 4 and Figure 6 As shown, since the connecting pipe 2 55 is arc-shaped along the surface of the top cover 42 and deviates from the radius of the top cover 42, the gas entering the inner cavity of the annular tube 6 presents a vortex flow and rotates in the inner cavity of the annular tube 6, as shown in FIG. Figure 8 As shown, in order to ensure that gas can be ejected from all positions of the annular incision 62, the opening of the annular incision 62 should be set smaller, and the gas pressure inside the annular tube 6 should be high enough. Combined with the above description, it can be seen that the high-pressure gas of the device can not only impact the zinc melt and realize the gas atomization method of zinc powder, but also provide power for the rotation of the centrifuge 4, thereby reducing the number of power equipment in the inner cavity of the kettle body 1 and reducing the equipment cost.

[0025] In order to supply air to the device, the present application also has a kettle cover 2 fixedly connected to the upper end opening of the kettle body 1 by bolts, which is used to seal the kettle body 1. It should be noted that the kettle body 1 of the present device is also provided with an exhaust assembly known in the prior art, which is used to discharge excess gas in time. A sealing disk 21 is provided in the middle of the kettle cover 2, and an air supply pipe 22 is fixedly connected to the upper surface of the sealing disk 21. An annular airway 211 is opened inside the edge of the sealing disk 21, and the upper ends of multiple connecting pipes 52 are connected to the inner cavity of the annular airway 211. The end of the air supply pipe 22 is connected to an external air pump, combined with Figure 2 and Figure 3 It can be known that the air supply pipe 22 delivers the high-pressure gas into the inner cavity of the annular airway 211, and respectively delivers it into multiple connecting pipes 52. The multiple connecting pipes 52 respectively deliver gas from various positions of the side wall of the annular bin 5 to the inner cavity of the annular bin 5, thereby increasing the force driving the annular sleeve 45 to rotate, ensuring that the annular sleeve 45 can have a greater rotation speed, and the rotation speed of the annular sleeve 45 can be indirectly controlled by controlling the pressure and flow rate of the high-pressure gas. A sealing sleeve 212 is fixedly arranged in the middle of the sealing disk 21, and the upper end of the feed pipe 3 passes through the inner cavity of the sealing sleeve 212 and is fixedly connected thereto. The setting of the sealing sleeve 212 is mainly used to position the feed pipe 3, so that the annular bin 5 together with the centrifuge 4 is suspended in the middle of the inner cavity of the kettle body 1.

[0026] In order to facilitate the collection of zinc powder, the middle parts of the filter screen 7 and the collection tray 8 of the present application are both recessed downwards, and the filter screen 7 is used to filter zinc powder of different particle sizes, wherein fine zinc powder can pass through the filter screen 7 and fall onto the collection tray 8 below, while zinc powder particles remain on the upper surface of the filter screen 7, and an inner collecting tube 71 is fixedly provided through the middle part of the filter screen 7, and an outer collecting tube 81 is provided through the middle part of the collection tray 8, and the upper end of the outer collecting tube 81 is fixedly connected to the filter screen 7, and the outer collecting tube 81 is sleeved on the outer side of the inner collecting tube 71, and the two are concentric, and the lower ends of the outer collecting tube 81 and the inner collecting tube 71 both pass through the bottom of the kettle body 1 and extend to the outside of the kettle body 1, combined with the outer collecting tube 81, the inner collecting tube 81 is provided with a plurality of inner collecting tubes, and the outer collecting tube 81 is provided with a plurality of inner collecting tubes, and the inner ... Figure 5 and Figure 6 As shown, a sleeve matched with the collecting inner tube 71 can also be installed on the lower surface of the chassis 41, and the upper end of the collecting inner tube 71 can be movably inserted into the sleeve to support the centrifuge 4 and avoid the centrifuge 4 from being displaced in the horizontal direction.

[0027] In order to collect the zinc powder and zinc powder particles separately, the present application also has a distribution box 9 arranged below the kettle body 1, and a partition plate is arranged inside the distribution box 9, which is used to divide the inner cavity of the distribution box 9 into two parts, so as to collect the zinc powder and zinc powder particles of different particle sizes respectively. The inner cavity of the collecting inner tube 71 and the inner cavity of the collecting outer tube 81 are respectively connected to the inner cavities at both ends of the distribution box 9, and the side walls of the collecting inner tube 71 and the side walls of the collecting outer tube 81 are respectively provided with through grooves that are flush with the upper surface of the filter screen 7 and the upper surface of the collecting plate 8, such as Fig. 9 and Fig.11 As shown, the zinc powder particles on the upper surface of the filter 7 can pass through the grooves on the surface of the collecting inner tube 71 to enter the inner cavity of the collecting inner tube 71, and the zinc powder on the upper surface of the collecting plate 8 can pass through the grooves on the surface of the collecting outer tube 81 to enter the inner cavity of the collecting outer tube 81, thereby achieving independent collection.

[0028] In order to prevent the filter screen 7 from being blocked, the present application also has a retaining ring 72 fixedly arranged on the upper surface of the filter screen 7, and the retaining ring 72 is directly opposite to the opening direction of the annular incision 62. The retaining ring 72 itself is made of hard material and can resist the impact of the high-pressure gas ejected from the annular incision 62, thereby preventing the filter screen 7 from being deformed and damaged due to the impact of the high-pressure gas for a long time. A stepped groove 73 is opened on the surface of the retaining ring 72, and a vibration ring 74 and a rotating ring 75 are arranged in the inner cavity of the stepped groove 73, and the rotating ring 75 covers the upper surface of the vibration ring 74 from top to bottom. The vibration ring 74 is fixed to the retaining ring 72, and the rotating ring 75 is rotatably installed in the inner cavity of the stepped groove 73. Fig.10 As shown, the rotating ring 75 can rotate and generate vibrations in the process of contacting with the vibration ring 74, thereby realizing the vibration of the filter screen 7, which not only improves the filtering effect of zinc powder, but also avoids clogging of zinc powder particles.

[0029] In order to realize the vibration of the filter 7, the present application also has a plurality of grooves distributed in a circular array on the upper surface of the vibration ring 74, and a rolling member 77 is rotatably installed on the lower surface of the rotating ring 75, such as Fig.10 As shown, when the rotating ring 75 rotates, since the upper surface of the vibration ring 74 is not flat, both the rotating ring 75 and the vibration ring 74 will vibrate and transmit the vibration to the filter screen 7. A receiving groove is provided on the lower surface of the rotating ring 75 for the installation of the rolling member 77. The rolling member 77 can shake slightly in the inner cavity of the receiving groove, and a flexible pad is provided on the inner wall of the receiving groove to reduce the vibration generated when the rolling member 77 rolls on the upper surface of the vibration ring 74, thereby preventing the vibration ring 74 from detaching from the inner cavity of the step groove 73. A plurality of vertical plates 76 distributed in a ring array are fixedly provided on the upper surface of the rotating ring 75, and the vertical plates The length direction of 76 is consistent with the radius direction of the kettle body 1. Combined with the above, the high-pressure gas in the inner cavity of the annular tube 6 rotates and flows in a vortex shape, and the annular cutout 62 is annular, so the gas ejected from the annular cutout 62 can rotate and flow in the inner cavity of the kettle body 1. Because the gas ejected from the annular cutout 62 is facing the baffle ring 72, the gas ejected from the annular cutout 62 can drive the rotating ring 75 to rotate by blowing on the vertical plate 76, thereby realizing passive vibration of the filter 7. In addition, according to usage requirements, the device can also choose to directly install vibration equipment known in the prior art such as a vibration pump on the filter 7.

[0030] In order to collect the zinc powder in time, the present application also has a reinforcement frame 78 fixedly set on the lower surface of the filter 7 and the lower surface of the collection tray 8, which is used to reinforce the filter 7 and the collection tray 8. A plurality of gathering plates 82 distributed in a ring array are fixedly installed on the upper surface of the collection tray 8. The gathering plates 82 are arc-shaped and deviate from the radial direction of the collection tray 8. Zinc powder is accumulated on the upper surface of the collection tray 8. Even if the gas between the filter 7 and the collection tray 8 rotates only a little, the zinc powder can easily rotate with it. The zinc powder can be blown by the rotating gas and then cooperated with the gathering plates 82, so that the zinc powder can be gathered to the middle of the collection tray 8 in time for collection by the outer collection tube 81.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reaction kettle for zinc powder refining, characterized in that: include: A kettle body (1), wherein a feed pipe (3) is inserted from top to bottom in the middle of the inner cavity of the kettle body (1), and a centrifuge (4) is rotatably arranged at the lower end of the feed pipe (3), wherein the centrifuge (4) comprises a bottom plate (41) and a top cover (42), and both are in the shape of a trumpet with an opening facing downward, a gap is left between the bottom plate (41) and the top cover (42), and the spacing of the gap gradually decreases from the center to the edge, and a plurality of strip partitions (43) distributed in an annular array are fixed between the bottom plate (41) and the top cover (42), and the strip partitions (43) are arc-shaped in a radial direction away from the top cover (42); An annular tube (6), wherein a high-pressure gas flows through the inner cavity of the annular tube (6), the annular tube (6) is located on the upper side of the edge of the top cover (42), an annular plate (61) is fixed to the surface of the annular tube (6), and an annular cutout (62) is provided inside the annular plate (61), and the opening spacing of the annular cutout (62) gradually decreases from the inside to the outside, and a filter screen (7) and a collection tray (8) are arranged in sequence below the annular tube (6).

2. A zinc powder refining reactor according to claim 1, characterized in that: The upper end of the top cover (42) is fixedly connected to a hollow cylinder (44), an annular sleeve (45) is fixedly provided on the outside of the hollow cylinder (44), an annular bin (5) is rotatably provided on the outside of the annular sleeve (45), a plurality of air inlet channels (51) distributed in an annular array are fixedly provided on the side wall of the annular bin (5), and the air inlet channels (51) are tangent to the surface of the annular bin (5), and a plurality of notched grooves (46) distributed in an annular array are provided on the side wall of the annular sleeve (45).

3. A zinc powder refining reactor according to claim 2, characterized in that: An annular connecting frame (56) is fixed on the upper surface of the annular bin (5), a flange is provided on the outer fixed sleeve of the feed pipe (3), and the flange and the annular connecting frame (56) are fixedly connected by bolts, the upper end of the hollow cylinder (44) movably passes through the upper inner wall of the annular bin (5) and fits the lower end surface of the feed pipe (3), and the end of the air inlet passage (51) is fixedly connected to a connecting pipe 1 (52).

4. A zinc powder refining reactor according to claim 3, characterized in that: The side wall of the annular bin (5) is fixedly provided with a plurality of air outlet channels (53) distributed in an annular array, and the air outlet channels (53) are spaced apart from the air inlet channels (51); the inner wall of the air outlet channel (53) is provided with an air outlet hole (54); the surface of the air outlet channel (53) is fixedly connected with a second connecting pipe (55); the lower end of the second connecting pipe (55) is fixedly connected with the annular pipe (6); the second connecting pipe (55) is arc-shaped along the surface of the top cover (42) in a radial direction away from the top cover (42).

5. A zinc powder refining reactor according to claim 4, characterized in that: The upper opening of the kettle body (1) is fixedly connected to a kettle cover (2) by bolts, a sealing disc (21) is arranged in the middle of the kettle cover (2), an upper surface of the sealing disc (21) is fixedly connected to an air supply pipe (22), an annular air passage (211) is provided inside the edge of the sealing disc (21), the upper ends of the plurality of connecting pipes (52) are all connected to the inner cavity of the annular air passage (211), a sealing sleeve (212) is fixedly arranged in the middle of the sealing disc (21), and the upper end of the feed pipe (3) passes through the inner cavity of the sealing sleeve (212) and is fixedly connected thereto.

6. A zinc powder refining reactor according to claim 1, characterized in that: The middle parts of the filter screen (7) and the collection plate (8) are both recessed downwards; an inner collection tube (71) is fixedly provided through the middle part of the filter screen (7); an outer collection tube (81) is provided through the middle part of the collection plate (8); the upper end of the outer collection tube (81) is fixedly connected to the filter screen (7); the outer collection tube (81) is sleeved on the outside of the inner collection tube (71) and the two are concentric; the lower ends of the outer collection tube (81) and the inner collection tube (71) both pass through the bottom of the kettle body (1) and extend to the outside of the kettle body (1).

7. A zinc powder refining reactor according to claim 6, characterized in that: A material distribution box (9) is arranged below the kettle body (1), and an isolation plate is arranged inside the material distribution box (9). The inner cavity of the collecting inner tube (71) and the inner cavity of the collecting outer tube (81) are respectively connected to the inner cavities at both ends of the material distribution box (9). The side walls of the collecting inner tube (71) and the side walls of the collecting outer tube (81) are provided with through grooves that are flush with the upper surface of the filter screen (7) and the upper surface of the collecting plate (8).

8. A zinc powder refining reactor according to claim 6, characterized in that: A retaining ring (72) is fixedly arranged on the upper surface of the filter screen (7), and the retaining ring (72) faces the opening direction of the annular cutout (62); a stepped groove (73) is provided on the surface of the retaining ring (72); a vibration ring (74) and a rotating ring (75) are arranged in the inner cavity of the stepped groove (73), and the rotating ring (75) covers the upper surface of the vibration ring (74) from top to bottom; the vibration ring (74) is fixed to the retaining ring (72), and the rotating ring (75) is rotatably installed in the inner cavity of the stepped groove (73).

9. A reaction kettle for zinc powder refining according to claim 8, characterized in that: The upper surface of the vibration ring (74) is provided with a plurality of grooves distributed in a circular array, the lower surface of the rotating ring (75) is rotatably mounted with a rolling element (77), and the upper surface of the rotating ring (75) is fixedly provided with a plurality of vertical plates (76) distributed in a circular array, and the length direction of the vertical plates (76) is consistent with the radius direction of the kettle body (1).

10. A reaction kettle for zinc powder refining according to claim 9, characterized in that: A reinforcement frame (78) is fixedly provided on the lower surface of the filter screen (7) and the lower surface of the collection tray (8), and a plurality of gathering plates (82) distributed in a ring array are fixedly installed on the upper surface of the collection tray (8), wherein the gathering plates (82) are arc-shaped in a radial direction away from the collection tray (8).

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