A rare earth polishing powder grinding device and preparation process

Abstract

The invention discloses a rare earth polishing powder grinding device and a preparation process, and belongs to the field of crushing and grinding devices; the grinding device provided by the invention comprises a shell, a crushing mechanism, and a grinding mechanism; the shell is provided with a feed hopper, a crushing chamber, a material dropping chamber, a grinding chamber, a material receiving chamber, and a mechanical transmission chamber from top to bottom; wherein, the crushing chamber is provided with a crushing mechanism, and the crushing mechanism is used for preliminarily crushing the rare earth polishing powder into small particles; the grinding chamber is provided with a grinding mechanism, and the grinding mechanism is used for grinding the crushed rare earth polishing powder; the crushing mechanism can crush agglomerated materials to prevent the agglomerated materials from falling into the grinding mechanism and causing the equipment to jam; the ground materials are collected in the material receiving chamber.

Description

Technical Field

[0001] The invention relates to the field of crushing and grinding devices, and in particular to a rare earth polishing powder grinding device and a preparation process. Background Art

[0002] Rare earth polishing powder refers to a powder of mixed light rare earth oxides with cerium oxide as the main component, which is used to improve the surface finish of products or parts. It is usually made from fluorocarbon cerium ore concentrate or soluble rare earth salts through chemical treatment, calcination, crushing, grinding, screening and other processes.

[0003] The polishing ability of rare earth polishing powder is closely related to the cerium oxide content and the physical and chemical properties of the polishing powder, such as viscosity, chemical activity, particle size, etc. During the crushing and grinding stage, the rare earth polishing powder agglomerates and is unevenly distributed in the grinding equipment, resulting in high local grinding pressure and low local grinding pressure, which leads to poor grinding effect of the rare earth polishing powder. Summary of the invention

[0004] The purpose of the present invention is to provide a rare earth polishing powder grinding device and a preparation process for crushing and grinding rare earth polishing powder.

[0005] The technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present invention provides a rare earth polishing powder grinding device, including a shell, wherein the shell is provided with a feed hopper, a crushing chamber, a material dropping chamber, a grinding chamber, a material receiving chamber, and a mechanical transmission chamber from top to bottom; a crushing mechanism is arranged in the crushing chamber; the crushing mechanism includes two crushing rollers arranged in parallel in the crushing chamber, a first driving gear is installed at one end of each of the two crushing rollers, the two first driving gears are located on the outside of the side plate of the crushing chamber, and the two first driving gears are meshed with each other; one of the two crushing rollers is connected to the crushing chamber through a belt transmission mechanism The first driving motor is connected; the parts of the two grinding rollers located in the grinding chamber are provided with a plurality of grinding toothed discs; the grinding toothed discs on the two grinding rollers are arranged in a staggered manner; the grinding chamber is surrounded by a cylindrical cylinder body, and the inner wall of the cylinder body is a grinding wall; a rotatable grinding disc is arranged in the center of the cylinder body, and an annular grinding gap is formed between the grinding disc and the inner wall of the cylinder body, and the grinding gap gradually decreases from top to bottom; the material is ground into powder by the friction between the grinding disc and the inner wall of the cylinder body, and the powder falls into the receiving chamber below from the annular gap at the bottom of the grinding gap.

[0007] In a possible design, a plurality of crushing teeth with the same direction are formed on the edge of the crushing toothed disk on the crushing roller shaft; the crushing teeth on the two crushing roller shafts are in opposite directions.

[0008] In a possible design, a material guide seat is arranged on both sides of the two crushing rollers; a plurality of spaced-apart stop plates are formed on the side of the material guide seat facing the crushing roller, the stop plates are triangular, and the upper and lower surfaces of the stop plates are inclined surfaces; a semicircular first groove is formed on the side of the stop plate facing the crushing roller, and the first groove can fit the surface of the crushing roller; the stop plate extends into the gap between adjacent crushing toothed discs on the corresponding crushing roller; the material guide seat is connected to the inner wall of the side plate of the crushing chamber.

[0009] In a possible design, the grinding disc is truncated, and a first rotating shaft is arranged in the center of the bottom surface of the grinding disc. The first rotating shaft passes downward through the material receiving chamber and enters the mechanical transmission chamber. The bottom of the first rotating shaft is connected to the second driving motor through a belt transmission mechanism.

[0010] In a possible design, a rotating bracket is arranged in the material receiving chamber, and the rotating bracket is installed on the bottom surface of the grinding disc; the rotating bracket includes a tray and a support column, the tray is circular, a through hole is arranged in the center of the tray, and the first rotating shaft in the center of the bottom surface of the grinding disc passes through the through hole in the center of the tray; the lower surface of the grinding disc is supported by the tray.

[0011] In a possible design, the lower edge of the cylindrical body extends into the material receiving chamber; an inner guide plate is arranged on the lower surface of the grinding disc, the inner guide plate is cylindrical, is arranged around the rotating bracket, and is fixedly connected to the rotating bracket; the upper edge of the inner guide plate and the lower surface of the grinding disc are clearance-matched; the lower edge of the inner guide plate is flush with the lower edge of the cylindrical body; an annular material guide channel is formed between the inner guide plate and the cylindrical body; an inclined material guide bottom plate is arranged at the bottom of the material guide channel; and a discharge port is arranged at the lower part of the material guide bottom plate.

[0012] In a possible design, the material guiding bottom plate is supported by a lifting drive device, and the lifting drive device is used to drive the material guiding bottom plate to move reciprocally up and down in the material guiding channel.

[0013] In a possible design, a hemispherical bulk head is arranged on the top of the grinding disc, and a first guide rod is arranged in the center of the bottom surface of the bulk head; a through hole is arranged on the axis of the grinding disc, and the through hole passes through the first rotating shaft downward; the first guide rod passes through the through hole of the axis of the grinding disc and extends downward into the mechanical transmission chamber; the bottom of the first guide rod is installed on a lever mechanism, and the bulk head is driven to reciprocate up and down through the lever mechanism.

[0014] In a possible design, a material gathering plate is arranged in the material dropping chamber, and the material gathering plate is composed of two symmetrically arranged inclined plates, the middle of the two inclined plates is recessed downward, and a circular material leakage hole is arranged in the middle of the two inclined plates; the material leakage hole is located directly above the bulk material head, and the diameter of the material leakage hole is smaller than the diameter of the bulk material head.

[0015] In a possible design, a dust removal box is provided on one side of the material receiving chamber and the mechanical transmission chamber, and a dust removal device is provided in the dust removal box. The dust removal device is used to perform negative pressure dust removal in the material receiving chamber.

[0016] In a second aspect, the present invention provides a rare earth polishing powder preparation process, which comprises the following steps: drying the rare earth carbonate, followed by continuous dry fluorination; followed by calcination in a rotary kiln; grinding the calcined product with a grinding device, followed by grading with a classifier, and finally adding a suspending agent to mix.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a rare earth polishing powder grinding device and a preparation process, the grinding device provided by the present invention comprises a shell, a crushing mechanism, and a grinding mechanism; the shell is provided with a feed hopper, a crushing chamber, a material dropping chamber, a grinding chamber, a material receiving chamber, and a mechanical transmission chamber from top to bottom; wherein, a crushing mechanism is provided in the crushing chamber, and the crushing mechanism is used for preliminarily crushing the rare earth polishing powder into small particles; a grinding mechanism is provided in the grinding chamber, and the grinding mechanism is used for grinding the crushed rare earth polishing powder; the crushing mechanism can crush agglomerated materials to prevent agglomerated materials from falling into the grinding mechanism and causing the equipment to jam; the ground materials are collected in the material receiving chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a three-dimensional structural diagram of the grinding device of the present invention.

[0019] Figure 2 Shown is a cross-sectional view of a grinding device according to the present invention.

[0020] Figure 3 The figure shows the structure of the crushing mechanism after removing the feed hopper of the present invention.

[0021] Figure 4 Shown is a structural diagram of the crushing toothed discs on the two crushing roller shafts of the present invention.

[0022] Figure 5 Shown is a diagram showing the installation position of the second drive motor of the present invention.

[0023] Figure 6 Shown is a three-dimensional structural display diagram of the rotating bracket of the present invention.

[0024] Figure 7 Shown is a three-dimensional structural display diagram of the material guiding channel of the present invention.

[0025] Figure 8 Shown is a side view of the material guide channel of the present invention.

[0026] Fig. 9 The structure of the lever mechanism of the present invention is shown in FIG. Figure 1 .

[0027] Fig.10 The structure of the lever mechanism of the present invention is shown in FIG. Figure 2 .

[0028] Fig.11 The structure of the lever mechanism of the present invention is shown in FIG. Figure 3 .

[0029] Fig.12 Shown is a cross-sectional view of the lever mechanism of the present invention.

[0030] Fig.13 The figure shows a connection structure showing that the first guide rod and the first rotating shaft rotate synchronously according to the present invention.

[0031] Fig.14 Shown is a diagram showing the installation position of the aggregate plate of the present invention.

[0032] Fig.15 Shown is a first-person structural display diagram of the sealing mechanism.

[0033] Fig.16 Shown is a second perspective structural display diagram of the sealing mechanism.

[0034] Fig.17 The structure of the dust removal device of the present invention is shown as follows Figure 1 .

[0035] Fig.18 The structure of the dust removal device of the present invention is shown as follows Figure 2 .

[0036] Description of reference numerals: housing 1, feed hopper 1.2, crushing chamber 1.3, material dropping chamber 1.4, grinding chamber 1.5, material receiving chamber 1.6, mechanical transmission chamber 1.7, dust removal box 1.8, first opening 1.9, second opening 1.10, material gathering plate 1.11, material leakage hole 1.12; crushing mechanism 2, crushing roller 2.1, first driving gear 2.2, first supporting plate 2.3, first bearing seat 2.4, first driven pulley 2.5, first driving motor 2.6 , first driving pulley 2.7, first transmission belt 2.8, crushing toothed disc 2.9, crushing teeth 2.10, material guide seat 2.11, stop plate 2.12, first slot 2.13; grinding mechanism 3, cylindrical barrel 3.1, reinforcing ribs 3.2, grinding disc 3.3, grinding gap 3.4, first rotating shaft 3.5, second driven pulley 3.6, second driving motor 3.7, second driving pulley 3.8, second transmission belt 3.9, bulk head 3.10, first guide rod 3.11, spherical rolling body 3.12, first limit plate 3.13, return spring 3.14, second guide slot 3.15, guide ridge 3.16; rotating bracket 4, tray 4.1, bracket column 4.2, support bearing 4.3, inner guide plate 4.4, guide bottom plate 4.5, discharge port 4.6, connecting short column 4.7, first telescopic rod 4.8; receiving tray 5, lever mechanism 6, lifting seat 6.1, first short shaft 6.2, guide plate 6.3, first guide slot 6. 4, limiting groove 6.5, lever support groove 6.6, rotating lever 6.7, rotating support 6.8, lever drive 6.9, pressing block 6.10, supporting part 6.11; sealing mechanism 7, blocking plate 7.1, positioning plate 7.2, guide slide bar 7.3, driving telescopic rod 7.4, sliding connecting seat 7.5, second supporting plate 7.6, connecting base 7.7; dust removal fan 8, filter tank 9, air inlet duct 10, exhaust box 11, air outlet duct 12, filter element 13, powder collecting box 14. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The present application embodiment first provides a rare earth polishing powder grinding device, see Figure 1 The figure shows a three-dimensional structure of the grinding device of the present invention. Figure 2 The figure shows a cross-sectional view of the grinding device of the present invention. The grinding device of the present invention comprises a housing 1, a crushing mechanism 2, and a grinding mechanism 3.

[0042] like Figure 2 As shown in the figure, the shell 1 is provided with a feed hopper 1.2, a crushing chamber 1.3, a material dropping chamber 1.4, a grinding chamber 1.5, a material receiving chamber 1.6, and a mechanical transmission chamber 1.7 from top to bottom. Among them, a crushing mechanism 2 is arranged in the crushing chamber 1.3, and the crushing mechanism 2 is used to preliminarily crush the rare earth polishing powder into small particles; a grinding mechanism 3 is arranged in the grinding chamber 1.5, and the grinding mechanism 3 is used to grind the crushed rare earth polishing powder; the agglomerated materials can be crushed by the crushing mechanism 2 to prevent the agglomerated materials from falling into the grinding mechanism 3 and causing the equipment to jam. The ground materials are collected in the material receiving chamber 1.6. The specific structure of each functional unit is described in detail below.

[0043] like Figure 1As shown in , in one specific embodiment of the present application, a square-section feed hopper 1.2 is disposed on the top of the housing 1, and the bottom edge of the feed hopper 1.2 is connected to the upper edge of the crushing chamber 1.3; the inside of the feed hopper 1.2 is connected to the crushing chamber 1.3. Figure 3 The structure of the crushing mechanism 2 is shown in the figure after the feed hopper 1.2 is removed. In the embodiment shown in the figure, the crushing chamber 1.3 is a rectangular chamber, and the crushing chamber 1.3 is formed by four side plates connected vertically. The crushing mechanism 2 is arranged in the crushing chamber 1.3.

[0044] In a specific embodiment of the present application, the pulverizing mechanism 2 includes two pulverizing rollers 2.1 arranged in parallel in the pulverizing chamber 1.3, both ends of the two pulverizing rollers 2.1 vertically pass through the side panels of the pulverizing chamber 1.3, one end of the two pulverizing rollers 2.1 is rotatably connected to the bearing, and the other end is respectively equipped with a first driving gear 2.2. Figure 3 As shown in the figure, the two first driving gears 2.2 are located on the outside of the side plate of the crushing chamber 1.3, and the two first driving gears 2.2 are meshed with each other. A first support plate 2.3 is provided below the first driving gear 2.2, and the first support plate 2.3 is arranged horizontally and vertically connected to the side plate of the crushing chamber 1.3. A first bearing seat 2.4 is installed on the first support plate 2.3, and the first bearing seat 2.4 is aligned with one of the crushing roller shafts 2.1, and the crushing roller shaft 2.1 passes through the first bearing seat 2.4; the end of the crushing roller shaft 2.1 passing through the first bearing seat 2.4 is connected to the first driven pulley 2.5, and the first driven pulley 2.5 exceeds the outer edge of the first support plate 2.3. A dust removal box 1.8 is provided below the first support, on one side of the material receiving chamber 1.6 and the mechanical transmission chamber 1.7; a first driving motor 2.6 is provided on the top surface of the dust removal box 1.8, a first driving pulley 2.7 is installed on the driving shaft of the first driving motor 2.6, and a first driving belt 2.8 is installed on the first driving pulley 2.7 and the first driven pulley 2.5. In this embodiment, the two crushing rollers 2.1 are driven to rotate synchronously by the first driving motor 2.6.

[0045] like Figure 3 As shown in FIG, the two crushing rollers 2.1 are provided with a plurality of crushing toothed discs 2.9 at the part of the crushing chamber 1.3; Figure 4 The structure of the crushing toothed discs 2.9 on the two crushing rollers 2.1 of the present invention is shown. The crushing toothed discs 2.9 are arranged at equal intervals on each crushing roller 2.1, and the crushing toothed discs 2.9 rotate together with the crushing roller 2.1. The edges of the crushing toothed discs 2.9 on the same crushing roller 2.1 are formed with a plurality of crushing teeth 2.10 in the same direction. The crushing teeth 2.10 on the two crushing rollers 2.1 are in opposite directions. Figure 4As shown in the figure, the crushing teeth 2.10 on the left crushing roller 2.1 are oriented clockwise, and the crushing teeth 2.10 on the right crushing roller 2.1 are oriented counterclockwise. In the embodiment shown in the figure, four crushing teeth 2.10 are formed on the edge of each crushing tooth disc 2.9. The crushing tooth discs 2.9 on the two crushing rollers 2.1 are arranged in a staggered manner; specifically, as shown in the figure, Figure 4 As shown in the figure, the gap between the adjacent crushing toothed discs 2.9 on the left crushing roller 2.1 clamps the edge of a crushing toothed disc on the right crushing roller 2.1. The middle area between the two crushing rollers 2.1 is the crushing area, and the material is crushed in the middle and falls into the drop chamber 1.4 below.

[0046] Furthermore, material guide seats 2.11 may be provided on both sides of the two crushing rollers 2.1; Figure 4 As shown in the figure, the guide seat 2.11 forms a plurality of spaced stop plates 2.12 on the side facing the crushing roller 2.1. The stop plates 2.12 are triangular in shape, and the upper and lower surfaces of the stop plates 2.12 are inclined surfaces. The stop plates 2.12 form a semicircular first groove 2.13 on the side facing the crushing roller 2.1. The first groove 2.13 can fit the surface of the crushing roller 2.1. The stop plates 2.12 extend into the gap between the adjacent crushing toothed discs 2.9 on the corresponding crushing roller 2.1, so that the material passes between the two crushing rollers 2.1. Figure 3 As shown in FIG. 1 , the material guide seat 2.11 is connected to the inner wall of the side plate of the crushing chamber 1.3.

[0047] like Figure 1 , Figure 2 As shown in the figure, the bottom of the crushing chamber 1.3 is connected to the rectangular blanking chamber 1.4; the bottom of the blanking chamber 1.4 is connected to the grinding chamber 1.5; in the embodiment shown in the figure, the grinding chamber 1.5 is surrounded by a cylindrical cylinder 3.1, and the inner wall of the cylindrical cylinder 3.1 is a grinding wall. Figure 1 As shown in , in order to increase the strength of the cylindrical body 3.1, a plurality of reinforcing ribs 3.2 are arranged on the outer surface of the cylindrical body 3.1, and the reinforcing ribs 3.2 are arranged vertically. Figure 2 As shown in the figure, a rotatable grinding disc 3.3 is arranged in the center of the cylindrical body 3.1, and an annular grinding gap 3.4 is formed between the grinding disc 3.3 and the inner wall of the cylindrical body 3.1, and the grinding gap 3.4 gradually becomes smaller from top to bottom. The material that is initially crushed into small particles by the pulverizing mechanism 2 enters the grinding chamber 1.5 through the material dropping chamber 1.4, and the material enters the grinding gap 3.4 during the rotation of the grinding disc 3.3, and the material is ground into powder through the friction between the grinding disc 3.3 and the inner wall of the cylindrical body 3.1, and the powder falls from the annular gap at the bottom of the grinding gap 3.4 into the receiving chamber 1.6 below.

[0048] In a specific embodiment of the present application, the grinding disc 3.3 is truncated cone-shaped, such as Figure 2As shown in , a truncated cone-shaped grinding disc 3.3 is installed in the center of the cylindrical body 3.1, and an annular grinding gap 3.4 is formed between the grinding disc 3.3 and the inner wall of the cylindrical body 3.1, and the grinding gap 3.4 gradually becomes smaller from top to bottom. A first rotating shaft 3.5 is arranged in the center of the bottom surface of the grinding disc 3.3, and the first rotating shaft 3.5 passes downward through the material receiving chamber 1.6 and enters the mechanical transmission chamber 1.7. The part of the first rotating shaft 3.5 located in the mechanical transmission chamber 1.7 is sleeved with a second driven pulley 3.6, and the second driven pulley 3.6 is fixedly connected to the first rotating shaft 3.5. An inverted second driving motor 3.7 is installed on the outer wall of the material receiving chamber 1.6, and the driving shaft of the second driving motor 3.7 faces downward, and a second driving pulley 3.8 is installed thereon; a second transmission belt 3.9 is installed on the second driving pulley 3.8 and the second driven pulley 3.6; as shown in Figure 5 The figure shows the installation position of the second drive motor 3.7 of the present invention. A first opening 1.9 is provided on the side of the mechanical transmission chamber 1.7, and the second drive belt 3.9 passes through the first opening 1.9 and extends into the mechanical transmission chamber. In the present invention, the second drive motor 3.7 drives the grinding disc 3.3 to rotate.

[0049] Furthermore, in order to achieve smooth rotation of the grinding disc 3.3, in a specific embodiment of the present application, a rotating bracket 4 is provided in the material receiving chamber 1.6; Figure 2 As shown in FIG. 1 , the rotating bracket 4 is mounted on the bottom surface of the grinding disc 3.3. Figure 6 The figure shows a three-dimensional structure display diagram of the rotating bracket 4 of the present invention. The rotating bracket 4 includes a tray 4.1 and a support column 4.2. The tray 4.1 is circular, and a through hole is set in the center of the tray 4.1. The first rotating shaft 3.5 in the center of the bottom surface of the grinding disc 3.3 passes through the through hole in the center of the tray 4.1. The lower surface of the grinding disc 3.3 is supported by the tray 4.1. In a preferred embodiment, an annular support bearing 4.3 is set on the upper surface of the tray 4.1, and the ball of the support bearing 4.3 protrudes from the upper surface of the tray 4.1, and the ball of the support bearing 4.3 supports the lower surface of the grinding disc 3.3.

[0050] like Figure 2 As shown in , in a specific embodiment of the present application, the lower edge of the cylindrical body 3.1 extends into the material receiving chamber 1.6; at the same time, an inner material guide plate 4.4 is provided on the lower surface of the grinding disc 3.3, and the inner material guide plate 4.4 is cylindrical. The inner material guide plate 4.4 is provided around the rotating bracket 4 and is fixedly connected to the rotating bracket 4. The upper edge of the inner material guide plate 4.4 and the lower surface of the grinding disc 3.3 are clearance-fitted; the lower edge of the inner material guide plate 4.4 is flush with the lower edge of the cylindrical body 3.1. An annular material guide channel is formed between the inner material guide plate 4.4 and the cylindrical body 3.1. As shown in FIG. Figure 7 Shown is a three-dimensional structural display diagram of the material guiding channel of the present invention. Figure 8 1 is a side view of the material guide channel of the present invention. Figure 7As shown in the figure, a plurality of connecting short columns 4.7 are arranged radially on the outer annular surface of the tray 4.1, and the connecting short columns 4.7 are connected to the inner material guide plate 4.4. An inclined material guide bottom plate 4.5 is arranged at the bottom of the material guide channel; a discharge port 4.6 is arranged at the lower part of the material guide bottom plate 4.5.

[0051] like Figure 2 As shown in FIG. 1 , the grinding disc 3.3 grinds the rare earth polishing powder, and the ground material falls onto the material guide bottom plate 4.5 along the material guide channel. Since the material guide bottom plate 4.5 is inclined, the material will be discharged from the discharge port 4.6 set at a lower position. Figure 1 As shown in the figure, a receiving tray 5 is placed in the receiving chamber 1.6, and the receiving tray 5 is located below the discharge port 4.6 to receive the material. A second opening 1.10 is provided on the side of the receiving chamber 1.6, and the second opening 1.10 can be provided with a closable door panel to facilitate the placement of the receiving tray 5.

[0052] Furthermore, in a specific embodiment of the present application, the guide bottom plate 4.5 is supported by a lifting drive device, so that the guide bottom plate 4.5 can reciprocate up and down in the guide channel, thereby promoting the movement of the ground material to the discharge port 4.6, thereby accelerating the discharge. Figure 7 As shown in one embodiment, the lifting drive device adopts a first telescopic rod 4.8; the lower surface of the material guide bottom plate 4.5 is supported by the first telescopic rod 4.8, and the first telescopic rod 4.8 can adopt a pneumatic telescopic rod or an electric telescopic rod; the material guide bottom plate 4.5 is driven to move up and down in the material guide channel by the first telescopic rod 4.8. When installing specifically, the first telescopic rod 4.8 is vertically installed in the material receiving chamber 1.6, and the piston rod of the first telescopic rod 4.8 extends upward and connects the bottom surface of the material guide bottom plate 4.5. Figure 7 In the illustrated embodiment, three first telescopic rods 4.8 are provided and distributed below the material guiding bottom plate 4.5.

[0053] Furthermore, in a specific embodiment of the present application, a hemispherical bulk material head 3.10 may be provided on the top of the grinding disc 3.3, and a first guide rod 3.11 is provided at the center of the bottom surface of the bulk material head 3.10. Figure 2 As shown in the figure, the bottom diameter of the bulk head 3.10 is larger than the top diameter of the grinding disc 3.3; the axis of the grinding disc 3.3 is provided with a through hole, which passes through the first rotating shaft 3.5 downward; the first guide rod 3.11 passes through the through hole of the axis of the grinding disc 3.3 and extends downward into the mechanical transmission chamber 1.7. The bottom of the first guide rod 3.11 is installed on the lever mechanism 6, and the bulk head 3.10 is driven to move up and down by the lever mechanism 6. During the up and down movement of the bulk head 3.10, the falling material is impacted, so that the material is further dispersed around the grinding disc 3.3, and the material is prevented from being concentrated in a local area of ​​the grinding disc 3.3.

[0054] like Fig. 9The structure of the lever mechanism 6 of the present invention is shown as follows Figure 1 , Fig.10 The structure of the lever mechanism 6 of the present invention is shown as follows Figure 2 . Fig.11 The structure of the lever mechanism 6 of the present invention is shown as follows Figure 3 . Fig.12 Shown is a cross-sectional view of the lever mechanism 6 of the present invention.

[0055] like Fig.12 As shown in , in a specific embodiment of the present application, the bottom end of the first guide rod 3.11 passes through the bottom of the first rotating shaft 3.5, and a rotatable spherical rolling body 3.12 is embedded in the bottom end of the first guide rod 3.11, and the spherical rolling body 3.12 is partially exposed from the bottom end of the first guide rod 3.11. The first guide rod 3.11 is provided with an annular first limit plate 3.13, and the first limit plate 3.13 is located below the first rotating shaft 3.5; an annular installation groove is formed between the first limit plate 3.13 and the bottom surface of the first rotating shaft 3.5, and a reset spring 3.14 is installed in the installation groove, and the reset spring 3.14 is sleeved on the first guide rod 3.11.

[0056] A lever mechanism 6 is arranged below the first guide rod 3.11. The lever mechanism 6 comprises a lifting seat 6.1, a guide plate 6.3, a lever assembly, and a lever drive 6.9. A lifting seat 6.1 is arranged below the first guide rod 3.11. Fig. 9 , Fig.10 As shown in , in a specific embodiment of the present application, the lifting seat 6.1 is cylindrical, and two first short shafts 6.2 are symmetrically arranged on the side of the lifting seat 6.1; two vertical guide plates 6.3 are symmetrically arranged on both sides of the lifting seat 6.1, and vertical first guide grooves 6.4 are arranged on the two guide plates 6.3; the two first short shafts 6.2 respectively extend into the first guide grooves 6.4 of the guide plates 6.3 on the corresponding side. The lifting seat 6.1 can move up and down vertically. In a preferred embodiment, a hemispherical limiting groove 6.5 is arranged in the center of the top surface of the lifting seat 6.1, and the exposed part of the spherical rolling body 3.12 embedded in the bottom end of the first guide rod 3.11 is located in the limiting groove 6.5. As shown Fig.11 As shown in the figure, a long lever support groove 6.6 is provided on the bottom surface of the lifting seat 6.1. The lever assembly includes a rotating lever 6.7 and a rotating support 6.8; the rotating support 6.8 is installed on one side of the lifting seat 6.1, and the rotating lever 6.7 is rotatably installed on the rotating support 6.8. One end of the rotating lever 6.7 extends into the lever support groove 6.6, and the other end is located below the lever drive 6.9. Fig.12As shown in the figure, the lever drive 6.9 adopts an electric telescopic rod or a pneumatic telescopic rod, and the lever drive 6.9 is installed on the top surface of the mechanical transmission chamber 1.7. The piston rod of the lever drive 6.9 extends downward, and a pressure block 6.10 is arranged at the bottom end of the piston rod, and the pressure block 6.10 contacts one end of the rotating lever 6.7. The lever drive 6.9 drives the lifting seat 6.1 to move up and down, thereby driving the first guide rod 3.11 and the bulk material head 3.10 at the top thereof to move up and down.

[0057] like Fig.12 As shown in , in a preferred embodiment, the rotating support 6.8 is located close to the lifting seat 6.1, so that the force arm between the rotating point and the lever drive 6.9 is greater than the force arm between the rotating point and the lifting seat 6.1; the lever drive 6.9 can drive the lifting seat 6.1 and the first guide rod 3.11 to move up and down with a smaller driving force.

[0058] like Fig.12 As shown in , in a preferred embodiment, cylindrical support parts 6.11 are provided at both ends of the rotating lever 6.7, and the two ends of the rotating lever 6.7 are in line contact with the lever support groove 6.6 and the pressing block 6.10. Or spherical support parts 6.11 are provided at both ends of the rotating lever 6.7, and the two ends of the rotating lever 6.7 are in point contact with the lever support groove 6.6 and the pressing block 6.10.

[0059] In the present application, the first guide rod 3.11 and the first rotating shaft 3.5 have the following two movement modes. First, the first guide rod 3.11 and the first rotating shaft 3.5 are clearance-matched, and the first guide rod 3.11 only moves up and down, and does not rotate synchronously with the first rotating shaft 3.5. Second, the first guide rod 3.11 rotates synchronously with the first rotating shaft 3.5, and the first guide rod 3.11 can move up and down; Fig.13 The figure shows a connection structure of the first guide rod 3.11 and the first rotating shaft 3.5 of the present invention rotating synchronously. A vertical second guide slot 3.15 is provided on the inner wall of the through hole in the center of the first rotating shaft 3.5. The cross section of the second guide slot 3.15 shown in the figure is semicircular; a vertical guide rib 3.16 is provided on the side of the first guide rod 3.11 corresponding to the second guide slot 3.15. The cross section of the guide rib 3.16 is semicircular, and the guide rib 3.16 is located in the second guide slot 3.15. When the first guide rod 3.11 rotates synchronously with the first rotating shaft 3.5, a greater impact can be exerted on the falling material, making the material more dispersed. This is beneficial for the grinding disc 3.3 to grind the material.

[0060] Furthermore, in the present application, a material collecting plate 1.11 may be further provided in the material blanking chamber 1.4, such as Fig.14The figure shows the installation position of the gathering plate 1.11 of the present invention. The gathering plate 1.11 is composed of two symmetrically arranged inclined plates, the middle of the two inclined plates is depressed downward, and a circular leakage hole 1.12 is arranged in the middle of the two inclined plates; the leakage hole 1.12 is located directly above the bulk head 3.10, and the diameter of the leakage hole 1.12 is smaller than the diameter of the bulk head 3.10. The material crushed by the crushing mechanism 2 first falls on the gathering plate 1.11, and then the material converges to the central leakage hole 1.12, and finally falls on the bulk head 3.10 for material dispersion. In order to speed up the speed of material convergence on the gathering plate 1.11, a vibration motor can be installed on the bottom surface of the gathering plate 1.11, and the vibration motor drives the gathering plate 1.11 to vibrate.

[0061] Furthermore, in a preferred embodiment of the present application, the discharge opening 4.6 of the material guiding bottom plate 4.5 may also be provided with a sealing mechanism 7, and the sealing mechanism 7 is used to close the discharge opening 4.6 of the material guiding bottom plate 4.5. Fig.15 The figure shows the structure of the sealing mechanism 7 from a first perspective. Fig.16 The figure shows the structure of the sealing mechanism 7 from a second viewing angle. The sealing mechanism 7 includes a crescent-shaped blocking plate 7.1, a positioning plate 7.2, a guide slide rod 7.3, and a driving telescopic rod 7.4. Fig.15 As shown in FIG, a crescent-shaped plugging plate 7.1 extends from the front edge of the positioning plate 7.2, and the plugging plate 7.1 can close the discharge port 4.6 of the guide bottom plate 4.5. Fig.16 As shown in the figure, the positioning plate 7.2 extends to the inner side of the inner guide plate 4.4, and two sliding connection seats 7.5 are arranged on the upper surface of the positioning plate 7.2, and through holes are arranged on the sliding connection seats 7.5. Two parallel guide slide bars 7.3 are arranged on the inner side of the inner guide plate 4.4, and the sliding connection seats 7.5 are slidably mounted on the guide slide bars 7.3. A second support plate 7.6 is arranged on the two support columns 4.2 at the bottom of the tray 4.1, and a driving telescopic rod 7.4 is mounted on the second support plate 7.6; the piston rod end of the driving telescopic rod 7.4 is connected to the connecting base 7.7 on the upper surface of the positioning plate 7.2. The positioning plate 7.2 is driven to move by driving the telescopic rod 7.4, so that the blocking plate 7.1 moves to the lower side of the discharge port 4.6 to close the discharge port 4.6.

[0062] Furthermore, in a preferred embodiment of the present application, a dust removal device is also provided in the dust removal box 1.8, and the dust removal device is used to perform negative pressure dust removal in the butt-joining chamber 1.6. Fig.17 The structure of the dust removal device of the present invention is shown as follows Figure 1 . Fig.18 The structure of the dust removal device of the present invention is shown as follows Figure 2The dust removal equipment includes a dust removal fan 8, a filter tank 9, an air inlet duct 10, an exhaust box 11, and an air outlet duct 12. As shown in the figure, an exhaust box 11 is arranged on the side wall of the receiving chamber 1.6, and the exhaust box 11 extends into the dust removal box 1.8; an air inlet is arranged on the side of the exhaust box 11 facing the receiving chamber 1.6; a downward exhaust port is arranged on the bottom surface of the exhaust box 11 located in the dust removal box 1.8, and the exhaust port is connected to the air inlet of the filter tank 9 through the air inlet duct 10. Fig.18 As shown in , the filter tank 9 is divided into a filter chamber at the bottom and a clean air chamber at the top. The filter chamber and the clean air chamber are separated by a partition. A filter element 13 is suspended in the center of the partition. The inside of the filter element 13 is connected to the clean air chamber. A powder collecting box 14 is placed under the filter element 13. An openable door panel is provided on the side of the filter tank 9 to take out the powder collecting box 14. An exhaust port is provided on the side of the clean air chamber, and the exhaust port is connected to the dust removal fan 8 through an air outlet duct 12.

[0063] The embodiment of the present application further provides a rare earth polishing powder preparation process, which comprises the following steps: drying the rare earth carbonate, followed by dry continuous fluorination; followed by calcination in a rotary kiln; grinding the calcined product with a grinding device, followed by grading with a classifier, and finally adding a suspending agent to mix.

[0064] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A rare earth polishing powder grinding device, characterized in that: The invention comprises a shell (1), wherein the shell (1) is provided with a feed hopper (1.2), a crushing chamber (1.3), a material dropping chamber (1.4), a grinding chamber (1.5), a material receiving chamber (1.6), and a mechanical transmission chamber (1.7) from top to bottom; a crushing mechanism (2) is arranged in the crushing chamber (1.3); the crushing mechanism (2) comprises two crushing rollers (2.1) arranged in parallel in the crushing chamber (1.3), a first driving gear (2.2) is installed at one end of each of the two crushing rollers (2.1), the two first driving gears (2.2) are located on the outside of the side plate of the crushing chamber (1.3), and the two first driving gears (2.2) are meshed with each other; one of the two crushing rollers (2.1) is connected to the first driving gear (2.2) via a belt transmission mechanism. A driving motor (2.6); a plurality of crushing toothed discs (2.9) are provided on the parts of the two crushing rollers (2.1) located in the crushing chamber (1.3); the crushing toothed discs (2.9) on the two crushing rollers (2.1) are arranged in a staggered manner; the grinding chamber (1.5) is surrounded by a cylindrical barrel (3.1), the inner wall of the cylindrical barrel (3.1) being a grinding wall; a rotatable grinding disc (3.3) is provided in the center of the cylindrical barrel (3.1), an annular grinding gap (3.4) is formed between the grinding disc (3.3) and the inner wall of the cylindrical barrel (3.1), and the grinding gap (3.4) gradually decreases from top to bottom; the material is ground into powder by friction between the grinding disc (3.3) and the inner wall of the cylindrical barrel (3.1), and the powder passes through the grinding gap (3 .4) falls into the material receiving chamber (1.6) below through the annular gap at the bottom; the grinding disc (3.3) is truncated, and a first rotating shaft (3.5) is arranged at the center of the bottom surface of the grinding disc (3.3). The first rotating shaft (3.5) passes downward through the material receiving chamber (1.6) and enters the mechanical transmission chamber (1.7). The bottom of the first rotating shaft (3.5) is connected to the second drive motor (3.7) through a belt transmission mechanism; a rotating bracket (4) is arranged in the material receiving chamber (1.6), and the rotating bracket (4) is installed on the bottom surface of the grinding disc (3.3); the rotating bracket (4) includes a tray (4.1) and a support column (4.2); the tray (4.1) is circular, and a through hole is arranged at the center of the tray (4.1). The first rotating shaft (3.5) at the center of the bottom surface of the grinding disc (3.3) is arranged. .5) passes through a through hole in the center of the tray (4.1); the lower surface of the grinding disc (3.3) is supported by the tray (4.1); a hemispherical bulk material head (3.10) is arranged on the top of the grinding disc (3.3), and a first guide rod (3.11) is arranged in the center of the bottom surface of the bulk material head (3.10); a through hole is arranged on the axis of the grinding disc (3.3), and the through hole passes through the first rotating shaft (3.5) downward; the first guide rod (3.11) passes through the through hole in the axis of the grinding disc (3.3) and extends downward into the mechanical transmission chamber (1.7); the bottom of the first guide rod (3.11) is installed on the lever mechanism (6), and the bulk material head (3.10) is driven to move reciprocally up and down through the lever mechanism (6); the lever mechanism (6) includes a lifting seat (6.1), a guide plate (6.3), lever assembly, lever drive (6.9); a lifting seat (6.1) is arranged below the first guide rod (3.11), and two first short shafts (6.2) are symmetrically arranged on the side of the lifting seat (6.1); two vertical guide plates (6.3) are symmetrically arranged on both sides of the lifting seat (6.1), and vertical first guide slots (6.4) are arranged on the two guide plates (6.3); the two first short shafts (6.2) extend into the first guide slots (6.4) of the guide plates (6.3) on the corresponding side respectively; the lifting seat (6.1) can move up and down vertically; a long strip-shaped lever support slot (6.6) is arranged on the bottom surface of the lifting seat (6.1); the lever assembly includes a rotating lever (6.7) and a rotating support (6.8);. A rotating support (6.8) is installed on one side of the lifting seat (6.1); a rotating lever (6.7) is rotatably installed on the rotating support (6.8); one end of the rotating lever (6.7) extends into the lever support groove (6.6), and the other end is located below the lever drive (6.9); the lever drive (6.9) is installed on the top surface of the mechanical transmission chamber (1.7); a piston rod of the lever drive (6.9) extends downward; a pressure block (6.10) is arranged at the bottom end of the piston rod; and the pressure block (6.10) contacts one end of the rotating lever (6.7).

2. The rare earth polishing powder grinding device according to claim 1, characterized in that: A plurality of crushing teeth (2.10) with the same direction are formed on the edge of the crushing toothed disc (2.9) on the crushing roller shaft (2.1); the crushing teeth (2.10) on the two crushing roller shafts (2.1) are in opposite directions.

3. The rare earth polishing powder grinding device according to claim 1, characterized in that: A material guide seat (2.11) is arranged on both sides of the two crushing rollers (2.1); a plurality of spaced stop plates (2.12) are formed on the material guide seat (2.11) toward the crushing roller (2.1) side, the stop plate (2.12) is triangular, and the upper and lower surfaces of the stop plate (2.12) are inclined surfaces; a semicircular first groove (2.13) is formed on the stop plate (2.12) toward the crushing roller (2.1) side, and the first groove (2.13) can fit the surface of the crushing roller (2.1); the stop plate (2.12) extends into the gap between adjacent crushing toothed discs (2.9) on the corresponding crushing roller (2.1); and the material guide seat (2.11) is connected to the inner wall of the side plate of the crushing chamber (1.3).

4. The rare earth polishing powder grinding device according to claim 1, characterized in that: The lower edge of the cylindrical body (3.1) extends into the material receiving chamber (1.6); an inner material guide plate (4.4) is arranged on the lower surface of the grinding disc (3.3); the inner material guide plate (4.4) is cylindrical, arranged around the rotating bracket (4), and fixedly connected to the rotating bracket (4); the upper edge of the inner material guide plate (4.4) and the lower surface of the grinding disc (3.3) are clearance-matched; the lower edge of the inner material guide plate (4.4) is flush with the lower edge of the cylindrical body (3.1); an annular material guide channel is formed between the inner material guide plate (4.4) and the cylindrical body (3.1); and an inclined material guide bottom plate (4.5) is arranged at the bottom of the material guide channel; A discharge port (4.6) is arranged at the lower part of the material guiding bottom plate (4.5).

5. The rare earth polishing powder grinding device according to claim 4, characterized in that: The material guiding bottom plate (4.5) is supported by a lifting drive device, and the lifting drive device is used to drive the material guiding bottom plate (4.5) to move reciprocally up and down in the material guiding channel.

6. The rare earth polishing powder grinding device according to claim 1, characterized in that: A material gathering plate (1.11) is arranged in the material dropping chamber (1.4), and the material gathering plate (1.11) is composed of two symmetrically arranged inclined plates, the middle of the two inclined plates is recessed downward, and a circular material leakage hole (1.12) is arranged in the middle of the two inclined plates; the material leakage hole (1.12) is located directly above the bulk material head (3.10), and the diameter of the material leakage hole (1.12) is smaller than the diameter of the bulk material head (3.10).

7. The rare earth polishing powder grinding device according to claim 1, characterized in that: A dust removal box (1.8) is provided on one side of the material receiving chamber (1.6) and the mechanical transmission chamber (1.7), and a dust removal device is provided in the dust removal box (1.8). The dust removal device is used to perform negative pressure dust removal in the material receiving chamber (1.6).

8. A process for preparing rare earth polishing powder, characterized in that: A rare earth polishing powder grinding device according to any one of claims 1 to 7 is used; the preparation process comprises the following steps: drying the rare earth carbonate, followed by continuous dry fluorination; followed by calcination in a rotary kiln; the calcined product is ground by a grinding device, followed by classification by a classifier, and finally a suspending agent is added to the mixture.

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