Inlaid type compression-resistant wear-resistant phosphate brick for lithium salt rotary kiln and manufacturing method thereof

Abstract

The application provides an inlaid type compression-resistant wear-resistant phosphate brick for a lithium salt rotary kiln and a manufacturing method, and belongs to the technical field of phosphate bricks. The phosphate brick comprises, from top to bottom, a phosphate layer, a heat insulation layer, and a glaze layer, a heat insulation connecting layer arranged between the phosphate layer and the heat insulation layer and between the heat insulation layer and the glaze layer, and a plug-in assembly. The heat insulation connecting layer is arranged between the phosphate layer and the heat insulation layer and between the heat insulation layer and the glaze layer, thereby meeting the heat insulation requirement. The upper and lower ends of each heat insulation connecting layer are respectively provided with a zigzag connecting structure, and the connection between each layer and the heat insulation connecting layer is provided with an inlaid notch, thereby greatly improving the connection reliability between the phosphate layer, the heat insulation layer, the glaze layer, and each heat insulation connecting layer, and improving the overall mechanical strength and compression resistance of the phosphate brick.

Description

Technical Field

[0001] This invention belongs to the field of phosphate brick technology, specifically an embedded pressure-resistant and wear-resistant phosphate brick for lithium salt rotary kilns and its manufacturing method. Background Technology

[0002] A lithium salt rotary kiln is a piece of equipment used to produce lithium salts. It mainly consists of a kiln body, a transmission system, a heating system, a cooling system, a feeding system, and a control system. Its working principle is to convert lithium ore and other raw materials into lithium salts by high-temperature calcination in the rotary kiln. The main feature is that the kiln body adopts a rotary structure, which can realize continuous production and automated control. Lithium salt rotary kilns have a wide range of applications, mainly used for the processing and production of lithium ore and other raw materials. They can produce lithium salt products of various specifications and purities. At the same time, lithium salt rotary kilns can also be applied in other fields, such as metallurgy, chemical industry, and building materials.

[0003] Phosphate bricks are refractory materials made primarily from phosphates, with the addition of appropriate binders and fillers, through processes such as mixing, molding, and curing. Their main components are tricalcium phosphate, dicalcium phosphate, and alumina, exhibiting excellent refractory properties and high-temperature stability, and are widely used in lithium salt rotary kilns.

[0004] The existing lithium salt rotary kiln lining uses a single internal connection method for phosphate bricks, resulting in unreliable connections and poor compressive strength. This makes the bricks prone to collapse and poses a safety risk. Furthermore, the connection between adjacent phosphate bricks is unstable and the connection process is cumbersome, reducing work efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an embedded, pressure-resistant, and wear-resistant phosphate brick for lithium salt rotary kilns and a method for manufacturing it.

[0006] The technical solution of the present invention is: an embedded pressure-resistant and wear-resistant phosphate brick for lithium salt rotary kiln, comprising a phosphate layer, a heat insulation layer and a glaze layer distributed from top to bottom, a heat-insulating connection layer disposed between the phosphate layer and the heat insulation layer and between the heat insulation layer and the glaze layer, and a plug-in assembly; The thermal insulation connecting layer is provided with a pressure-resistant support component, which includes multiple vertical support rods distributed from left to right within the thermal insulation connecting layer, a horizontal crossbar provided within the thermal insulation connecting layer and penetrating each of the vertical support rods, and multiple horizontal short rods provided on the front and rear sides of each of the vertical support rods. Each of the vertical support rods, horizontal crossbars, and horizontal short rods is provided with multiple through holes. The upper and lower ends of the thermal insulation connecting layer are respectively provided with serrated connecting structures, and the serrated connecting structures are bonded to the phosphate layer, the heat insulation layer, and the glaze layer by adhesive. The plug-in assembly includes a first connecting strip that is perpendicularly distributed and connected to the left and right sides of the phosphate layer, the heat insulation layer, the glaze layer, and the heat insulation connecting layer; a second connecting strip that is perpendicularly distributed and connected to the upper and lower ends of the phosphate layer, the heat insulation layer, the glaze layer, and the heat insulation connecting layer; a first plug-in strip disposed on the side wall of one of the first connecting strips; a second plug-in strip disposed on one of the second connecting strips; a first plug-in groove disposed on the side wall of the other first connecting strip; and a second plug-in groove disposed on the other second connecting strip.

[0007] Furthermore, the phosphate layer, the heat insulation layer, the glaze layer, and each heat insulation connecting layer are provided with a third insertion strip on both the left and right sides. The first connecting strip is provided with a third insertion groove that corresponds one-to-one with the third insertion strip. The size of the third insertion groove matches that of the third insertion strip, and an adhesive is filled between the third insertion groove and the third insertion strip.

[0008] Explanation: The phosphate layer, insulation layer, glaze layer, and each thermal insulation connecting layer are initially connected to the two first connecting strips by the limiting snap-fit ​​between the third interlocking strip and the third interlocking groove. At the same time, adhesive is filled at the joints for secondary connection. This combination connection method greatly increases the reliability of the connection between the phosphate layer, insulation layer, glaze layer, and each thermal insulation connecting layer, and improves the overall mechanical strength and compressive strength of the phosphate brick.

[0009] Furthermore, the cross-section of the first connector strip is formed by two isosceles trapezoids abutting each other through their upper bases, and the abutting points of the two isosceles trapezoids are provided with snap-fit ​​notches. The size of the first connector groove matches the size of the first connector strip. The structure of the second connector strip is the same as that of the first connector strip, and the size of the second connector groove matches the size of the second connector strip.

[0010] Explanation: The cross-section of the first connector strip is designed as two isosceles trapezoids that abut together at their upper bases. This design increases the sharp angles of the outer wall of the first connector strip, allowing it to be mutually locked and engaged with the first connector groove. This avoids the need for external components for fixing, which would increase costs. By providing a locking notch at the abutment of the two isosceles trapezoids, the sharp angles of the first connector strip are locked into the notch, further increasing the reliability of the connection between the first connector groove and the first connector strip. This improves the overall mechanical strength and compressive strength of the phosphate brick. The second connector strip is designed with the same structure for the same purpose.

[0011] Furthermore, there are multiple first plug-in strips, which are distributed in parallel and are all perpendicularly connected to the side wall of the first connecting strip. Each first plug-in strip has multiple first connecting ports, and the first connecting ports on the same first plug-in strip are interconnected. The first plug-in groove corresponds one-to-one with the first plug-in strip. There are multiple second plug-in strips, which are distributed in parallel and are all perpendicularly connected to the side wall of the second connecting strip. Each second plug-in strip has multiple second connecting ports, and the two second connecting ports on the same second plug-in strip are interconnected. The second plug-in groove corresponds one-to-one with the second plug-in strip.

[0012] Instructions: When splicing two adjacent phosphate bricks in the left-right direction, insert the first connector strip of one phosphate brick into the corresponding first connector groove from the bottom. When splicing two adjacent phosphate bricks in the up-down direction, slide the second connector strip of one phosphate brick into the corresponding second connector groove from the left or right side. By setting multiple first and second connector strips, the purpose is to increase the connection reliability of two adjacent phosphate bricks in all directions. By setting interconnected first connection ports on the first connector strips, the purpose is to ensure that adhesive is injected into each first connection port while one first connection port is filled with adhesive, thus avoiding repeated changes in the addition position and reducing the manufacturing efficiency of phosphate bricks. At the same time, the second connection port on the second connector strips serves the same purpose of secondary bonding between the first connector strip and the second connector groove through adhesive, greatly improving the connection reliability.

[0013] Furthermore, there are multiple horizontal crossbars, which are distributed in parallel within the insulation connection layer, and each horizontal crossbar passes through each of the vertical support rods. Multiple short horizontal rods are provided on both the front and rear sides of each horizontal crossbar.

[0014] Explanation: By limiting the number of horizontal crossbars, the support reliability of the compressive strength components is further increased, ensuring that the compressive strength of the phosphate bricks meets the usage requirements, improving the success rate of phosphate brick preparation, and avoiding material waste.

[0015] Furthermore, the phosphate layer is prepared by mixing phosphate and high-alumina bauxite in a weight ratio of 3:1, the heat insulation layer is made of any one of expanded perlite, expanded vermiculite or expanded gangue, and the thermal insulation connecting layer is made of polystyrene.

[0016] Note: Phosphate bricks prepared from phosphate and high-alumina bauxite have excellent high-temperature stability, slag resistance, refractoriness, and wear resistance, and are therefore widely used in lithium salt rotary kilns to meet the requirements. Using any one of expanded perlite, expanded vermiculite, or expanded gangue as the insulation layer provides excellent insulation performance, lightweight properties, and good refractoriness, effectively reducing heat transfer and loss and improving the thermal efficiency of the kiln. Polystyrene is used as the insulation bonding layer for secondary insulation, thereby greatly improving the thermal efficiency of the kiln.

[0017] Furthermore, the phosphate layer, the heat insulation layer, and the glaze layer are all provided with inlay recesses. The corresponding inlay recesses on the phosphate layer and the glaze layer are all located on the side close to the heat insulation layer, and the corresponding inlay recesses on the heat insulation layer are located at the upper and lower ends. The sidewalls of each heat insulation connecting layer are embedded in the corresponding inlay recesses.

[0018] Note: The purpose of embedding the sidewalls of each insulation connection layer into the corresponding inlay notch is to further improve the connection strength between the layers and the overall compressive strength of the phosphate brick.

[0019] Furthermore, the adhesive is a zirconium phosphate silicon adhesive.

[0020] Note: With zirconium silicon phosphate as the main component, it has good mechanical properties and high temperature resistance, which can increase the reliability of the connection.

[0021] This invention also discloses a method for manufacturing phosphate bricks, used to manufacture the aforementioned embedded, pressure-resistant, and wear-resistant phosphate bricks for lithium salt rotary kilns, comprising the following steps: S1. The raw materials for preparing the phosphate layer, heat insulation layer and glaze layer are mixed according to the formula, trapped, rolled back, machine-pressed and dried to form the phosphate layer, heat insulation layer and glaze layer. S2. Insert anti-compression support components between the phosphate layer and the insulation layer, and between the insulation layer and the glaze layer. At the same time, fill the insulation material to form an insulation connection layer. During the filling of the insulation material, the insulation material is connected to the vertical support rod, the horizontal crossbar and the inner wall of the horizontal short rod through the opening. The serrated connection structure of the insulation material is bonded to the phosphate layer, the insulation layer and the glaze layer by an adhesive. S3. Connect the first connecting strip to the left and right sides of the phosphate layer, the heat insulation layer, the glaze layer, and the heat insulation connecting layer, and connect the second connecting strip to the upper and lower ends of the phosphate layer, the heat insulation layer, the glaze layer, and the heat insulation connecting layer, thereby preparing and generating a pressure-resistant and wear-resistant phosphate brick.

[0022] Compared with the prior art, the beneficial effects of the present invention are: (1) The compressive and wear-resistant phosphate brick of the present invention is composed of a phosphate layer, a heat insulation layer and a glaze layer. The phosphate brick meets the requirements for use in terms of wear resistance, stability, fire resistance and heat insulation performance. At the same time, a heat insulation connection layer is set between the phosphate layer and the heat insulation layer and between the heat insulation layer and the glaze layer to meet the heat insulation requirements, thereby greatly improving the thermal efficiency of the kiln. Since a compressive support is also set in the heat insulation connection layer, the combination of the support of the compressive support, the sawtooth connection structure set at the upper and lower ends of each heat insulation connection layer, and the inlaid recess set at the connection between each layer and the heat insulation connection layer greatly improves the connection reliability between the phosphate layer, the heat insulation layer, the glaze layer and each heat insulation connection layer, and improves the overall mechanical strength and compressive performance of the phosphate brick. (2) When it is necessary to splice two adjacent phosphate bricks in the left-right direction, the first insert strip of one of the phosphate bricks can be inserted into the corresponding first insert groove from the bottom end. When it is necessary to splice two adjacent phosphate bricks in the up-down direction, the second insert strip of one of the phosphate bricks can be slid into the corresponding second insert groove from the left or right side. At the same time, by setting the number of first insert strips and second insert strips to several, the connection reliability of two adjacent phosphate bricks in each direction can be increased. By setting the first connecting port that is interconnected on the first insert strip, the purpose is to fill the adhesive into one of the first connecting ports while injecting adhesive into each of the first connecting ports. This avoids repeatedly changing the addition position and reducing the manufacturing efficiency of phosphate bricks. At the same time, the second bonding connection between the first insert strip and the second insert groove is performed by adhesive, which greatly improves the connection reliability. The above operation process is simple, the connection is reliable, the work efficiency is high, and it is suitable for large-scale promotion. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is the invention Figure 1 Enlarged view of point A in the image; Figure 3 This is a structural schematic diagram of the compressive support member of the present invention; Figure 4 This is a cross-sectional view of the present invention when the second connecting strip is not installed; Figure 5 This is the invention Figure 4 Enlarged view of point A in the image; Figure 6 This is a schematic diagram of the overall external structure of the present invention.

[0024] Among them, 1-phosphate layer, 2-insulation layer, 3-glaze layer, 4-thermal insulation connection layer, 40-compression support component, 41-vertical support rod, 42-horizontal crossbar, 43-horizontal short rod, 44-through port, 45-serrated connection structure, 5-plug assembly, 50-first connecting strip, 51-second connecting strip, 52-first plug strip, 520-snap notch, 521-first connection port, 53-second plug strip, 530-second connection port, 54-first plug groove, 55-second plug groove, 56-third plug strip, 57-third plug groove, 6-embedded notch. Detailed Implementation

[0025] To further understand the content of the present invention, the present invention will be described in detail below through embodiments.

[0026] Example 1 like Figure 1 , 2 As shown in Figures 1 and 3, an embedded pressure-resistant and wear-resistant phosphate brick for lithium salt rotary kilns includes a phosphate layer 1, a heat insulation layer 2, and a glaze layer 3 distributed from top to bottom, a heat-insulating connecting layer 4 disposed between the phosphate layer 1 and the heat insulation layer 2 and between the heat insulation layer 2 and the glaze layer 3, and a plug-in component 6. The thermal insulation connecting layer 4 is provided with a pressure-resistant support 40. The pressure-resistant support 40 includes six vertical support rods 41 arranged from left to right in the thermal insulation connecting layer 4, a horizontal crossbar 42 arranged in the thermal insulation connecting layer 4 and passing through each vertical support rod 41, and two horizontal short rods 43 arranged on the front and rear sides of each vertical support rod 41. Each vertical support rod 41, horizontal crossbar 42 and horizontal short rod 43 is provided with six through holes 44. The upper and lower ends of the thermal insulation connecting layer 4 are respectively provided with a serrated connecting structure 45, and the serrated connecting structure 45 is bonded to the phosphate layer 1, the heat insulation layer 2 and the glaze layer 3 by an adhesive. like Figure 5 , 6 As shown, the plug-in assembly 5 includes a first connecting strip 50 that is perpendicularly distributed and connected to the left and right sides of the phosphate layer 1, the heat insulation layer 2, the glaze layer 3, and the heat insulation connecting layer 4; a second connecting strip 51 that is perpendicularly distributed and connected to the upper and lower ends of the phosphate layer 1, the heat insulation layer 2, the glaze layer 3, and the heat insulation connecting layer 4; a first plug-in strip 52 disposed on the side wall of one of the first connecting strips 50; a second plug-in strip 53 disposed on one of the second connecting strips 51; a first plug-in groove 54 disposed on the side wall of the other first connecting strip 50; and a second plug-in groove 55 disposed on the other second connecting strip 51. The cross section of the first insert strip 52 is formed by two isosceles trapezoids abutting each other through the upper base, and the abutting part of the two isosceles trapezoids is provided with a snap-fit ​​notch 520. The size of the first insert groove 54 matches the size of the first insert strip 52. The structure of the second insert strip 53 is the same as the structure of the first insert strip 52, and the size of the second insert groove 55 matches the size of the second insert strip 53. There are two horizontal crossbars 42, which are distributed in parallel within the insulation connection layer 4. Both horizontal crossbars 42 penetrate each vertical support bar 41. Two horizontal short bars 43 are provided on the front and rear sides of each horizontal crossbar 42. Phosphate layer 1 is prepared by phosphate and high-alumina bauxite in a weight ratio of 3:1. The material of insulation layer 2 is any one of expanded perlite, expanded vermiculite or expanded gangue. The material of insulation connection layer 4 is polystyrene. The phosphate layer 1, the heat insulation layer 2 and the glaze layer 3 are all provided with inlay recesses 6. The corresponding inlay recesses 6 on the phosphate layer 1 and the glaze layer 3 are all located on the side close to the heat insulation layer 2. The corresponding inlay recesses 6 on the heat insulation layer 2 are located at the upper and lower ends. The sidewalls of each heat insulation connecting layer 4 are embedded in the corresponding inlay recesses 6. The adhesive used is a zirconium phosphate silicon adhesive.

[0027] Example 2 This embodiment discloses a method for manufacturing phosphate bricks, used to manufacture an embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln as described in Example 1, comprising the following steps: S1. The raw materials for preparing phosphate layer 1, heat insulation layer 2 and glaze layer 3 are mixed according to the formula, conditioned, rolled back, machine-pressed and dried to form phosphate layer 1, heat insulation layer 2 and glaze layer 3. S2. Insert the compression support 40 between the phosphate layer 1 and the insulation layer 2, and between the insulation layer 2 and the glaze layer 3. At the same time, fill the insulation material to form the insulation connection layer 4. During the filling of the insulation material, the insulation material is connected to the inner wall of the vertical support rod 41, the horizontal crossbar 42 and the horizontal short rod 43 through the port 44. The serrated connection structure 45 of the insulation material is bonded to the phosphate layer 1, the insulation layer 2 and the glaze layer 3 by an adhesive. S3. Connect the first connecting strip 50 to the left and right sides of the phosphate layer 1, the heat insulation layer 2, the glaze layer 3 and the heat insulation connecting layer 4, and connect the second connecting strip 51 to the upper and lower ends of the phosphate layer 1, the heat insulation layer 2, the glaze layer 3 and the heat insulation connecting layer 4, thereby preparing a pressure-resistant and wear-resistant phosphate brick.

[0028] Example 3 The difference between this embodiment and Embodiment 1 is that: like Figure 1As shown, the phosphate layer 1, the heat insulation layer 2, the glaze layer 3, and each heat insulation connecting layer 4 are provided with a third insertion strip 56 on both the left and right sides. The first connecting strip 50 is provided with a third insertion groove 57 that corresponds one-to-one with the third insertion strip 56. The size of the third insertion groove 57 matches that of the third insertion strip 56, and the third insertion groove 57 and the third insertion strip 56 are filled with zirconium phosphate silicon adhesive.

[0029] Example 4 The difference between this embodiment and Embodiment 2 is that: The phosphate layer 1, the heat insulation layer 2, the glaze layer 3, and each heat insulation connecting layer 4 are initially connected to the two first connecting strips 50 by the limiting snap-fit ​​between the third plug strip 56 and the third plug groove 57. At the same time, the joint is filled with zirconium phosphate silicon adhesive for secondary connection.

[0030] Example 5 The difference between this embodiment and Embodiment 3 is that: like Figure 4 , 6 As shown, there are three first plug-in strips 52, which are distributed in parallel and are all perpendicularly connected to the side wall of the first connecting strip 50. Each first plug-in strip 52 has five first connecting ports 521, and the first connecting ports 521 on the same first plug-in strip 52 are interconnected. The first plug-in grooves 54 correspond one-to-one with the first plug-in strips 52. There are three second plug-in strips 53, which are distributed in parallel and are all perpendicularly connected to the side wall of the second connecting strip 51. Each second plug-in strip 53 has five second connecting ports 530, and the two second connecting ports 530 on the same second plug-in strip 53 are interconnected. The second plug-in grooves 55 correspond one-to-one with the second plug-in strips 53.

[0031] Example 6 The difference between this embodiment and embodiment 4 is that: When it is necessary to splice two adjacent phosphate bricks in the left-right direction, the first insertion strip 52 of one of the phosphate bricks can be inserted into the bottom of the corresponding first insertion groove 54. When it is necessary to splice two adjacent phosphate bricks in the up-down direction, the second insertion strip 53 of one of the phosphate bricks can be slid into the left or right side of the corresponding second insertion groove 55.

Claims

1. An embedded, pressure-resistant, and wear-resistant phosphate brick for lithium salt rotary kilns, characterized in that, It includes a phosphate layer (1), a heat insulation layer (2) and a glaze layer (3) distributed from top to bottom, a heat insulation connection layer (4) disposed between the phosphate layer (1) and the heat insulation layer (2) and between the heat insulation layer (2) and the glaze layer (3), and a plug-in assembly (5). The thermal insulation connecting layer (4) is provided with a pressure-resistant support (40). The pressure-resistant support (40) includes multiple vertical support rods (41) arranged in the thermal insulation connecting layer (4) and distributed from left to right, a horizontal crossbar (42) arranged in the thermal insulation connecting layer (4) and passing through each of the vertical support rods (41), and multiple horizontal short rods (43) arranged on the front and rear sides of each vertical support rod (41). Multiple through holes (44) are provided on the vertical support rods (41), the horizontal crossbars (42) and the horizontal short rods (43). The upper and lower ends of the thermal insulation connecting layer (4) are respectively provided with a sawtooth connecting structure (45), and the sawtooth connecting structure (45) is bonded to the phosphate layer (1), the heat insulation layer (2) and the glaze layer (3) by an adhesive. The plug-in assembly (5) includes a first connecting strip (50) that is perpendicularly distributed and connected to the left and right sides of the phosphate layer (1), the heat insulation layer (2), the glaze layer (3) and the heat insulation connecting layer (4), a second connecting strip (51) that is perpendicularly distributed and connected to the upper and lower ends of the phosphate layer (1), the heat insulation layer (2), the glaze layer (3) and the heat insulation connecting layer (4), a first plug-in strip (52) provided on the side wall of one of the first connecting strips (50), a second plug-in strip (53) provided on one of the second connecting strips (51), a first plug-in groove (54) provided on the side wall of the other first connecting strip (50), and a second plug-in groove (55) provided on the other second connecting strip (51).

2. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, The phosphate layer (1), the heat insulation layer (2), the glaze layer (3), and each heat insulation connecting layer (4) are provided with a third plug strip (56) on both the left and right sides. The first connecting strip (50) is provided with a third plug groove (57) that corresponds one-to-one with the third plug strip (56). The third plug groove (57) matches the size of the third plug strip (56), and an adhesive is filled between the third plug groove (57) and the third plug strip (56).

3. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, The cross section of the first plug strip (52) is formed by two isosceles trapezoids abutting each other through the upper base, and the abutting part of the two isosceles trapezoids is provided with a snap-fit ​​notch (520). The first plug groove (54) matches the size of the first plug strip (52). The structure of the second plug strip (53) is the same as the structure of the first plug strip (52), and the size of the second plug groove (55) matches the size of the second plug strip (53).

4. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, There are multiple first plug strips (52), which are distributed in parallel and are all perpendicularly connected to the side wall of the first connecting strip (50). Each first plug strip (52) is provided with multiple first connection ports (521), and the first connection ports (521) on the same first plug strip (52) are interconnected. The first plug groove (54) corresponds to the first plug strip (52) one by one. There are multiple second plug strips (53), which are distributed in parallel and are all perpendicularly connected to the side wall of the second connecting strip (51). Each second plug strip (53) is provided with multiple second connection ports (530), and the two second connection ports (530) on the same second plug strip (53) are interconnected. The second plug groove (55) corresponds to the second plug strip (53) one by one.

5. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, There are multiple horizontal crossbars (42), which are distributed in parallel within the insulation connection layer (4), and all of the horizontal crossbars (42) penetrate each of the vertical support rods (41). Multiple horizontal short rods (43) are provided on the front and rear sides of each horizontal crossbar (42).

6. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, The phosphate layer (1) is prepared by phosphate and high-alumina bauxite in a weight ratio of 3:

1. The heat insulation layer (2) is made of any one of expanded perlite, expanded vermiculite or expanded gangue. The heat insulation connection layer (4) is made of polystyrene.

7. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, The phosphate layer (1), the heat insulation layer (2) and the glaze layer (3) are all provided with inlay recesses (6). The inlay recesses (6) on the phosphate layer (1) and the glaze layer (3) are all located on the side close to the heat insulation layer (2). The inlay recesses (6) on the heat insulation layer (2) are located at the upper and lower ends. The sidewalls of each heat insulation connecting layer (4) are embedded in the corresponding inlay recesses (6).

8. The embedded, pressure-resistant, and wear-resistant phosphate brick for a lithium salt rotary kiln according to claim 1, characterized in that, The adhesive is a zirconium phosphate silicon adhesive.

9. A method for manufacturing phosphate bricks, used to manufacture the embedded, pressure-resistant, and wear-resistant phosphate bricks for lithium salt rotary kilns as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. The raw materials for preparing the phosphate layer (1), heat insulation layer (2) and glaze layer (3) are mixed according to the formula, conditioned, rolled back, machine-pressed and dried to form the phosphate layer (1), heat insulation layer (2) and glaze layer (3). S2. Insert a pressure-resistant support (40) between the phosphate layer (1) and the insulation layer (2), and between the insulation layer (2) and the glaze layer (3). At the same time, fill the insulation material to form an insulation connection layer (4). During the filling of the insulation material, the insulation material is connected to the inner wall of the vertical support rod (41), the horizontal crossbar (42) and the horizontal short rod (43) through the port (44). The serrated connection structure (45) of the insulation material is bonded to the phosphate layer (1), the insulation layer (2) and the glaze layer (3) by an adhesive. S3. Connect the first connecting strip (50) to the left and right sides of the phosphate layer (1), the heat insulation layer (2), the glaze layer (3) and the heat insulation connecting layer (4), and connect the second connecting strip (51) to the upper and lower ends of the phosphate layer (1), the heat insulation layer (2), the glaze layer (3) and the heat insulation connecting layer (4) to prepare and generate a pressure-resistant and wear-resistant phosphate brick.

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