Lining plate structure of jet mill

Abstract

The utility model relates to the technical field of titanium dioxide production devices, and discloses a jet mill lining plate structure which is characterized in that a jet mill lining plate is arranged in a jet mill main machine; the jet mill main machine comprises a bottom plate, a grinding ring and a cover plate; a bottom plate is arranged at the lower part of the grinding ring; a cover plate is arranged at the upper part of the grinding ring; the cover plate and the bottom plate are the same in structure, and a material opening is formed in the center of the bottom plate. The jet mill lining plate comprises a lower top plate, an upper top plate and a side lining plate; side lining plates are fixedly arranged on the upper end surfaces of the lower top plates; upper top plates are fixedly arranged on the upper end surfaces of the side lining plates; the lower top plate and the upper top plate have the same structure; the side lining plate is formed by connecting a plurality of lining plate single bodies end to end; the lining plate single bodies are in an arc-shaped plate shape, and a plurality of grooves are formed in the outer arc faces of the lining plate single bodies. Through the design of the structure of the lining plate single body, the heating area of the lining plate single body during calcination is increased, the phenomenon of uneven calcination is reduced, and the situation that normal production is affected due to the fact that the lining plate single body is damaged during use is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of titanium dioxide production equipment, in particular to an air flow mill lining plate structure. Background Art

[0002] A jet mill is a commonly used pulverizing device in titanium dioxide production. Flat jet mills are often used to pulverize materials. They consist of a pulverizing chamber, nozzle, discharge port, airflow outlet, compressed air inlet, and a grading zone.

[0003] The grinding chamber is located within the main jet mill unit, which includes a base plate, grinding ring, cover plate, and a liner mounted within the cavity. The cavity enclosed by the liner forms the grinding chamber. Existing jet mill liners are wear-resistant ceramic components primarily made of silicon carbide. Due to their dense material, thickness, and length, they are prone to becoming undercooked during calcination at temperatures approaching 1800°C. During operation, especially during the heating process, the undercooked liner is subjected to thermal shock, becoming relatively brittle. This uneven heating can damage the liner, leading to interruptions in production or heating, and the entry of impurities into the system, impacting the quality of the material within.

[0004] Therefore, there is an urgent need for an air flow mill liner structure to solve the problem that the raw liner is easily damaged during use. Utility Model Content

[0005] The purpose of the utility model is to overcome the existing technical problems and provide a liner structure of an air flow mill.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented according to the following technical solutions:

[0007] A jet mill liner structure, wherein the jet mill liner is arranged in a jet mill main unit; the jet mill main unit comprises a base plate, a grinding ring, and a cover plate; the base plate is arranged below the grinding ring, and the cover plate is arranged above the grinding ring; the cover plate has the same structure as the base plate, and a material port is arranged at the center of the base plate; a feed sleeve is connected to the grinding ring, and the feed sleeve comprises a feed pipe and an arc plate; the arc plate is fixedly arranged on the inner side wall of the grinding ring, and a feed hole is arranged on the arc plate, and the feed pipe passes through the grinding ring and is connected to the feed hole; a limit ring is arranged on the periphery of the upper end surface of the material port, and the limit ring is fixedly connected to the base plate;

[0008] The air flow mill liner includes a lower top plate, an upper top plate, and a side liner; the side liner is provided on the upper end surface of the lower top plate, and the upper top plate is provided on the upper end surface of the side liner;

[0009] The lower top plate and the upper top plate have the same structure; the lower top plate is annular, the diameter of the inner ring of the lower top plate matches the diameter of the outer ring of the limit ring, and the outer diameter of the lower top plate matches the inner diameter of the grinding ring; the upper end surface of the lower top plate is distributed with multiple annular grooves from the inside to the outside;

[0010] The side lining plate is a ring with a notch, and the notch of the side lining plate matches the arc plate;

[0011] The side lining plate is composed of a plurality of lining plate monomers connected end to end; the lining plate monomer is in the shape of an arc plate, and a plurality of grooves are arranged on the outer arc surface of the lining plate monomer.

[0012] The jet mill unit described in this utility model is a flat jet mill unit commonly used in the prior art. Its base plate and cover plate are both round, and the grinding ring is an oblate cylindrical shape. The base plate, cover plate, and grinding ring are fixedly and sealed together. The specific connection method can be high-temperature adhesive bonding or other removable sealing methods.

[0013] The outer arc surface of the lining plate unit is provided with grooves to reduce the weight of the lining plate unit, save raw materials, increase the heating area, reduce the occurrence of uneven calcination, and avoid the occurrence of "cooked" phenomenon.

[0014] Preferably, the grooves are arranged at equal distances from top to bottom on the outer arc surface of the liner body.

[0015] Preferably, the height of the groove is 10-30 mm and the depth is 10-25 mm.

[0016] Preferably, the interval between adjacent grooves is 10-25 mm.

[0017] Specifically, the interval here refers to the height of the outer arc surface between the lowermost end of the groove located above and the uppermost end of the groove located below between two adjacent grooves.

[0018] Preferably, the distance between the upper end surface of the lining plate unit and the upper end surface of the uppermost groove is 10-30 mm, and the distance between the lower end surface of the lining plate unit and the lower end surface of the lowermost groove is 10-30 mm.

[0019] Preferably, the distance between the left end of the groove and the left end of the lining plate unit is 10-30 mm, and the distance between the right end of the groove and the right end of the lining plate unit is 10-30 mm.

[0020] Preferably, the groove is filled with Teflon engineering plastic.

[0021] Preferably, the lower top plate is composed of a plurality of top plate monomers connected end to end; the top plate monomers are fan-shaped.

[0022] Preferably, the thickness of the lining plate is 30-50 mm, the length is 700-900 mm, and the height is 90-150 mm. Specifically, the length here refers to the arc length.

[0023] Preferably, the number of the liner units is four.

[0024] Preferably, high temperature glue is used to bond adjacent lining plate units, high temperature glue is used to bond the side lining plate and the grinding ring; high temperature glue is used to bond the side lining plate and the upper top plate, and high temperature glue is used to bond the side lining plate and the lower top plate; the upper top plate and the cover plate are fixedly connected, and the lower top plate and the bottom plate are fixedly connected.

[0025] Furthermore, the upper top plate and the cover plate are fixedly connected by fixing pins, and the lower top plate and the bottom plate are fixedly connected by fixing pins; the fixing pins are made of carbon steel.

[0026] Specifically, the connection between the top plate and the bottom plate is illustrated as follows:

[0027] The lower top plate is placed on the upper end of the base plate, and multiple fixing pins are fixed at equal intervals around the outer ring of the lower top plate. The fixing pins are rectangular, with an inverted U-shaped notch on the upper end and a circular hole at the bottom of the inverted U-shaped notch. A rectangular notch is also provided on the upper side of the rear of the fixing pin along its length, giving the rear of the fixing pin a stepped shape.

[0028] The outermost portion of the lower top plate has an edge, the lower portion of the rear end surface of the fixing pin is welded to the bottom plate, and the top of the rectangular notch of the fixing pin contacts the edge of the lower top plate, pressing the lower top plate tightly against the bottom plate.

[0029] Working principle:

[0030] The lining plate unit of the present invention is preferably configured as four pieces, so that the volume of a single piece is smaller, the weight is relatively light, the deformation is smaller, and it is convenient for packaging, transportation, disassembly, etc., and the labor intensity is reduced.

[0031] The utility model provides grooves on the lining plate monomer, which can greatly increase the heating area of the lining plate monomer during calcination and reduce the occurrence of uneven calcination.

[0032] The thickest part of the silicon carbide material of the liner monomer structure of the utility model is only 20-30 mm, which greatly reduces the difficulty of calcining the liner monomer and thus significantly reduces the probability of the occurrence of the undercooked phenomenon.

[0033] The utility model fills and fixes the groove with high-temperature resistant Teflon engineering plastic. Taking into account the inherent properties of Teflon engineering plastic, such as resistance to acids and alkalis, resistance to various organic solvents, high temperature resistance, low friction coefficient, good mechanical properties, and resistance to becoming brittle, the utility model fills the groove with high-temperature resistant Teflon engineering plastic to reduce the impact on the side liner during use, thereby extending the service life. Ultimately, during use, the probability of damage to the liner due to lining is reduced.

[0034] Components not limited in the present invention all adopt conventional means in the field. Those skilled in the art can select their models and installation methods according to actual usage requirements and clearly understand how to install and control them. They will not be described in detail here.

[0035] The utility model achieves the following beneficial effects:

[0036] The utility model has a simple structure and is easy to operate. The utility model increases the heating area of the liner monomer during calcination through the design of the liner monomer structure, reduces the occurrence of uneven calcination, and avoids damage to the liner monomer during use, thereby affecting the normal production. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0038] Figure 2 for Figure 1 Schematic diagram of the structure of the liner monomer;

[0039] Figure 3 This is a schematic structural diagram of Example 2 of the present utility model;

[0040] Figure 4 This is a schematic structural diagram of Example 4 of the present utility model;

[0041] Figure 5 for Figure 4 Top view of the middle and lower roof;

[0042] Figure 6 for Figure 5 An enlarged view of the fixing pin in FIG;

[0043] Figure 7 for Figure 6 Right side view of the center retaining pin.

[0044] In the figure: 1. Bottom plate; 2. Grinding ring; 3. Feed inlet; 4. Feed pipe; 5. Arc plate; 6. Feed hole; 7. Limiting ring; 8. Lower top plate; 9. Side lining plate; 10. Annular groove; 11. Lining plate unit; 12. Groove; 13. Top plate unit; 14. Fixing pin; 15. Inverted U-shaped notch; 16. Round hole; 17. Rectangular notch; 18. Edge. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0046] Example 1

[0047] like Figure 1、 Figure 2 As shown, a jet mill liner structure is provided in the jet mill main unit; the jet mill main unit comprises a base plate 1, a grinding ring 2, and a cover plate; the base plate is provided at the lower part of the grinding ring, and the cover plate is provided at the upper part of the grinding ring; the cover plate has the same structure as the base plate, and a material port 3 is provided at the center of the base plate; a feed sleeve is connected to the grinding ring, and the feed sleeve comprises a feed pipe 4 and an arc-shaped plate 5; the arc-shaped plate is fixedly provided on the inner side wall of the grinding ring, and a feed hole 6 is provided on the arc-shaped plate, and the feed pipe passes through the grinding ring and is connected to the feed hole; a limit ring 7 is provided on the periphery of the upper end surface of the material port, and the limit ring is fixedly connected to the base plate;

[0048] The airflow mill liner includes a lower top plate 8, an upper top plate, and a side liner 9; the side liner is provided on the upper end surface of the lower top plate, and the upper top plate is provided on the upper end surface of the side liner;

[0049] The lower top plate and the upper top plate have the same structure and are symmetrically arranged in an upper and lower direction. The lower top plate is annular, and the diameter of the inner ring of the lower top plate matches the diameter of the outer ring of the limit ring, and the outer diameter of the lower top plate matches the inner diameter of the grinding ring. The upper end surface of the lower top plate is distributed with multiple annular grooves 10 from the inside to the outside.

[0050] The side lining plate is a ring with a notch, and the notch of the side lining plate matches the arc plate;

[0051] The side lining plate is composed of four lining plate monomers 11 connected end to end; the lining plate monomer is an arc-shaped plate, and three grooves 12 are provided on the outer arc surface of the lining plate monomer. The three grooves are arranged at equal distances from top to bottom on the outer arc surface of the lining plate monomer.

[0052] The lower top plate is composed of three top plate monomers 13 connected end to end; the top plate monomers are fan-shaped plates.

[0053] In this embodiment, the groove has a height of 25 mm and a depth of 18 mm, and is an arc-shaped groove; the interval between adjacent grooves is 20 mm;

[0054] The distance between the upper end of the lining plate and the upper end of the uppermost groove is 20 mm, and the distance between the lower end of the lining plate and the lower end of the lowermost groove is 20 mm. The distance between the left end of the groove and the left end of the lining plate is 20 mm, and the distance between the right end of the groove and the right end of the lining plate is 20 mm.

[0055] In this embodiment, the thickness of the side lining plate is 40 mm.

[0056] The thickest part of the side lining plate of this embodiment is only 25 mm (the "thickness" here refers to the side lining plate as a whole, not the "thickness" of the side lining plate), which greatly reduces the difficulty of calcining the side lining plate, thereby significantly reducing the probability of the occurrence of the undercooked phenomenon.

[0057] exist Figure 1In the figure, since the cover plate and the bottom plate have the same structure, and the upper fixed edge and the lower top plate have the same structure, the corresponding cover plate and the upper top plate are not shown in the accompanying drawings.

[0058] Example 2

[0059] like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the number of liner units is three, and the rest is the same as embodiment 1.

[0060] Example 3

[0061] The difference between this embodiment and embodiment 1 is that the groove is filled with Teflon engineering plastic.

[0062] Example 4

[0063] like Figures 4 to 7 As shown, the difference between this embodiment and embodiment 1 is that the lower top plate is composed of four top plate monomers 13 connected end to end; the top plate monomers are fan-shaped plates.

[0064] In this embodiment, the upper top plate and the cover plate are fixedly connected by fixing pins 14, and the lower top plate and the bottom plate are fixedly connected by fixing pins; the fixing pins are made of carbon steel.

[0065] The lower top plate is placed on the upper end of the base plate. Twelve fixing pins are fixed at equal intervals around the outer ring of the lower top plate. The fixing pins are rectangular, with an inverted U-shaped notch 15 on the upper end of the pin, and a circular hole 16 at the bottom of the inverted U-shaped notch. A rectangular notch 17 is provided on the upper side of the rear end of the pin along its length, giving the rear end of the pin a stepped shape.

[0066] The outermost portion of the lower top plate has an edge 18, the lower portion of the rear end surface of the fixing pin is welded to the bottom plate, and the top of the rectangular notch of the fixing pin contacts the edge of the lower top plate, pressing the lower top plate tightly against the bottom plate.

[0067] When the base plate is connected to the grinding ring, high-temperature sealant is used for fixed connection, and the high-temperature sealant covers the entire fixing pin.

[0068] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Any technical deformation made according to the technical solution of the present invention falls within the protection scope of the present invention.

Claims

1. A jet mill liner structure, wherein the jet mill liner is disposed within a jet mill main unit; the jet mill main unit comprises a base plate, a grinding ring, and a cover plate; the base plate is disposed below the grinding ring, and the cover plate is disposed above the grinding ring; the cover plate and the base plate have the same structure, and a feed port is disposed at the center of the base plate; a feed sleeve is connected to the grinding ring, and the feed sleeve comprises a feed pipe and an arc plate; the arc plate is fixedly disposed on the inner side wall of the grinding ring, and a feed hole is disposed on the arc plate; the feed pipe passes through the grinding ring and is connected to the feed hole; the characteristics are: A limiting ring is provided on the periphery of the upper end surface of the material port, and the limiting ring is fixedly connected to the bottom plate; The air flow mill liner includes a lower top plate, an upper top plate, and a side liner; the side liner is provided on the upper end surface of the lower top plate, and the upper top plate is provided on the upper end surface of the side liner; The lower top plate and the upper top plate have the same structure; the lower top plate is annular, the diameter of the inner ring of the lower top plate matches the diameter of the outer ring of the limit ring, and the outer diameter of the lower top plate matches the inner diameter of the grinding ring; the upper end surface of the lower top plate is distributed with multiple annular grooves from the inside to the outside; The side lining plate is a ring with a notch, and the notch of the side lining plate matches the arc plate; The side lining plate is composed of a plurality of lining plate monomers connected end to end; the lining plate monomer is in the shape of an arc plate, and a plurality of grooves are arranged on the outer arc surface of the lining plate monomer.

2. The air jet mill liner structure according to claim 1, characterized in that: The grooves are arranged at equal distances from top to bottom on the outer arc surface of the lining plate unit.

3. The air flow mill liner structure according to claim 1, characterized in that: The height of the groove is 10-30 mm and the depth is 10-25 mm.

4. The air jet mill liner structure according to claim 1, characterized in that: The interval between adjacent grooves is 10-25 mm.

5. The air jet mill liner structure according to claim 1, characterized in that: The distance between the upper end surface of the lining plate unit and the upper end surface of the uppermost groove is 10-30 mm, and the distance between the lower end surface of the lining plate unit and the lower end surface of the lowermost groove is 10-30 mm.

6. The air jet mill liner structure according to claim 1, characterized in that: The distance between the left end of the groove and the left end of the lining plate unit is 10-30 mm, and the distance between the right end of the groove and the right end of the lining plate unit is 10-30 mm.

7. The air jet mill liner structure according to claim 1, characterized in that: The groove is filled with Teflon engineering plastic.

8. The air jet mill liner structure according to claim 1, characterized in that: The lower top plate is composed of a plurality of top plate monomers connected end to end; the top plate monomers are fan-shaped plates.

9. The air jet mill liner structure according to claim 1, characterized in that: The thickness of the lining plate unit is 30-50 mm, the length is 700-900 mm, and the height is 90-150 mm.

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