Rubber-ceramic core-shell structure reinforced manganese steel-based composite liner plate and preparation and application thereof

Abstract

This invention provides a rubber-ceramic core-shell reinforced manganese steel-based composite liner, comprising a manganese steel matrix and a plurality of rubber-ceramic core-shell reinforcing bodies embedded in the manganese steel matrix. Each rubber-ceramic core-shell reinforcing body consists of a ceramic shell and a rubber core encasing the ceramic shell, with a gradient transition between the rubber core and the ceramic shell, and also a gradient transition between the ceramic shell and the adjacent manganese steel matrix. This invention also provides a method for preparing the above-mentioned rubber-ceramic core-shell reinforced manganese steel-based composite liner and its application as a liner material for a semi-autogenous grinding mill feed trolley. The liner of this invention combines the properties of manganese steel, ceramic, and rubber, fully utilizing the wear resistance of ceramic, the impact resistance of rubber, and the work hardening effect of manganese steel, significantly improving the service life of the liner.

Description

Technical Field

[0001] This invention relates to the field of iron-based composite materials and their preparation technology, and in particular to a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner and its preparation and application. Background Technology

[0002] In recent years, large-scale semi-autogenous grinding mills have been widely used in mineral processing enterprises across China. However, the increased diameter of the mill cylinder, along with the larger particle size of the ore and the diameter of the grinding balls, brings high-energy impacts and severe wear to the feed trolley liners. This results in short liner lifespans, frequent replacements, and significant waste of resources and manpower on the production line, severely restricting equipment operating efficiency and causing substantial economic losses.

[0003] Currently, there are three main types of materials used for the liners of the feed trolleys in semi-autogenous grinding mills: steel materials such as high-manganese steel or low-alloy steel, polymer materials represented by natural rubber, and steel-rubber composite wear-resistant materials. High-manganese steel or low-alloy steel, with its good wear resistance and moderate impact resistance, has always been the primary material for feed trolley liners. However, with the increase in the diameter of the semi-autogenous grinding mill cylinder and the increase in ore particle size and grinding ball diameter, insufficient impact resistance has become its main failure mode. Furthermore, these materials are often manufactured using casting methods, and unavoidable casting defects make them more prone to breakage under high-impact conditions. Natural rubber has elastic deformation characteristics and can effectively absorb the impact energy of materials, exhibiting impact resistance. However, natural rubber has low hardness and poor wear resistance, and is prone to cracking and failure, especially when resisting the shearing and cutting of irregularly shaped ores. Steel-rubber composite wear-resistant materials are a new type of composite wear-resistant material developed in recent years, with broad application prospects. For example, the invention patent with application number CN202111009824.1 discloses a method for preparing steel-rubber composite wear-resistant parts with a three-dimensional interpenetrating network structure, which has been applied in wear-resistant parts such as liners, slurry pump guard plates, and lifting strips. However, there is no interfacial diffusion bonding between steel and rubber. If either steel or rubber fails, the entire wear-resistant liner will fail, resulting in a short service life. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner for a feed trolley of a large semi-autogenous grinding mill, and its preparation and application, so as to avoid the problems of insufficient impact resistance, insufficient wear resistance and short service life caused by using existing materials.

[0005] The present invention solves the above-mentioned technical problems by adopting the following technical solutions:

[0006] A rubber-ceramic core-shell structure reinforced manganese steel-based composite liner includes a manganese steel matrix and a plurality of rubber-ceramic core-shell structure reinforcements embedded in the manganese steel matrix. Each rubber-ceramic core-shell structure reinforcement is composed of a ceramic shell and a rubber core encapsulated inside the ceramic shell. The rubber core and the ceramic shell form a gradient transition zone, and the ceramic shell and the adjacent manganese steel matrix also form a gradient transition zone, forming a shell-based transition zone.

[0007] As one of the preferred embodiments of the present invention, the upper surface of the rubber-ceramic core-shell structure reinforcement is flush with the upper surface of the manganese steel substrate, has a diameter of 25-50 mm, and a height of 2 / 3 of the thickness of the liner.

[0008] As one of the preferred embodiments of the present invention, the distribution of the plurality of rubber-ceramic core-shell structure reinforcements in the manganese steel matrix is ​​determined according to the impact force law of the ore material borne at the application location of the liner, specifically: impact energy > 100 J / cm 2 Area, 1 per cm 2 Equally spaced distribution; 100 J / cm 2 Impact energy >50J / cm 2 Area, at 0.3 per cm 2 Equally spaced distribution; 50 J / cm 2 Impact energy >20J / cm 2 Area, at 0.1 cells / cm 2 Equally spaced distribution; impact energy less than 20 J / cm 2 In the area, no rubber-ceramic core-shell reinforcement is placed.

[0009] A method for preparing the above-mentioned rubber-ceramic core-shell structure reinforced manganese steel-based composite liner, characterized by comprising the following steps:

[0010] S1. Based on the ore drop point, design the distribution of the rubber-ceramic core-shell structure reinforcement in the manganese steel matrix;

[0011] S2. Prepare a wax model according to the distribution of the rubber-ceramic core-shell structure reinforcement; repeatedly apply coating, sprinkle ceramic sand, and harden the wax model, ensuring that the particle size of the ceramic sand decreases from large to small and then increases again throughout the process; after melting the wax and drying, obtain a three-dimensional ceramic model.

[0012] S3. After assembling the three-dimensional ceramic mold with the ingate and sprue, place it in the sand box; after compaction, melt the manganese steel material and pour it into the sand box to obtain the ceramic-manganese steel skeleton.

[0013] S4. Inject the heated and softened rubber into the ceramic-manganese steel skeleton to form a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner.

[0014] As one of the preferred embodiments of the present invention, in step S2, the wax model is made of a mixture of 50% paraffin wax and 50% stearic acid, which is pressed into a mold using a wax press and solidified to obtain the wax model.

[0015] As one of the preferred embodiments of the present invention, in step S2, the coating is a mixture of quartz powder and water glass adhesive.

[0016] As one of the preferred embodiments of the present invention, the ceramic sand is at least one of Al2O3, ZrO2, and TiC.

[0017] As one of the preferred embodiments of the present invention, in step S2, the ceramic sand particle size is selected in the range of 10 mesh to 200 mesh; for example, the ceramic sand particle size can be designed sequentially from large to small and then from small to large as 10 mesh, 14 mesh, 20 mesh, 40 mesh, 100 mesh, 200 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, 10 mesh, or 10 mesh, 20 mesh, 40 mesh, 100 mesh, 20 mesh, 100 mesh, 40 mesh, 20 mesh, 10 mesh, or 10 mesh, 14 mesh, 20 mesh, 40 mesh, 100 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, 10 mesh.

[0018] As one of the preferred embodiments of the present invention, the hardening process is carried out in an ammonium chloride solution.

[0019] As one of the preferred embodiments of the present invention, in step S3, the manganese steel matrix is ​​made of medium or high manganese steel.

[0020] As one of the preferred embodiments of the present invention, in step S4, the rubber used is wear-resistant rubber, and the preferred components and proportions are as follows:

[0021] Natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silica powder: vulcanizing agent = 100: 6: 30: 1: 5: 5: 8: 2: 1.

[0022] Application of the above-mentioned rubber-ceramic core-shell structure reinforced manganese steel-based composite liner as a liner material for a semi-autogenous grinding mill feed trolley.

[0023] The advantages of this invention compared to the prior art are:

[0024] (1) The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner of the present invention integrates the characteristics of manganese steel, ceramic and rubber, giving full play to the wear resistance of ceramic, the impact resistance of rubber and the work hardening effect of manganese steel, significantly improving the service life of the liner to more than 3 times that of low alloy steel wear-resistant liner.

[0025] (2) This invention uses the gradient change of ceramic particle size as a means to repeatedly apply coating, sprinkle ceramic sand and harden the ceramic shell through multiple processes to achieve the change of "porous-microporous-non-porous-microporous-porous" on the inner and outer surfaces. Then, through composite with liquid manganese steel material and rubber liquid, a gradient transition interface between manganese steel-ceramic and ceramic-rubber is achieved. The gradient transition interface structure can not only give full play to the load transfer function, but also "restrain" the performance differences between different materials, and comprehensively improve the material performance (impact resistance, wear resistance) and service life.

[0026] (3) The structural parameters (such as diameter, height, ceramic type, ceramic shell thickness, etc.) and their distribution of the rubber-ceramic core-shell structure reinforcement of the present invention are controllable and adjustable, so as to meet the requirements of different working conditions for the performance of the liner. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the rubber-ceramic core-shell reinforced manganese steel composite liner in Example 1 (the rubber-ceramic core-shell reinforcement is actually "near-cylindrical rod-shaped", and is represented by "cylindrical shape" in the figure);

[0028] Figure 2 This is a magnified schematic diagram of the rubber-ceramic core-shell structure reinforcement in Example 1;

[0029] Figure 3 This is a flowchart illustrating the preparation process of the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner in Examples 1-3;

[0030] Figure 4 This is a characterization diagram of the pore structure of the three-dimensional ceramic mold in Example 1. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Furthermore, the materials, equipment, and methods used in the following embodiments, unless otherwise specified, are all commercially available materials, equipment, and methods conventional in the art, and will not be described in detail again.

[0032] Example 1

[0033] This embodiment describes a high impact energy condition (impact energy > 100 J / cm²). 2 Rubber-ceramic core-shell structure reinforced manganese steel-based composite liner, such as Figure 1 , 2As shown, the structure includes a manganese steel matrix and multiple rubber-ceramic core-shell reinforcing structures embedded within the manganese steel matrix. Each rubber-ceramic core-shell reinforcing structure is nearly cylindrical, with its upper surface flush with the upper surface of the manganese steel matrix, and consists of a ceramic shell and a rubber core encased within the ceramic shell. A gradient transition exists between the rubber core and the ceramic shell, forming a "core-shell" transition zone. Similarly, a gradient transition exists between the ceramic shell and the adjacent manganese steel matrix, forming a "shell-base" transition zone.

[0034] Preparation method ( Figure 3 ):

[0035] (1) Manganese steel substrate thickness 150mm, 1 piece / cm 2 The rubber-ceramic core-shell structure reinforcement is evenly distributed, with a diameter of 50 mm and a height of 2 / 3 of the thickness of the manganese steel matrix.

[0036] (2) Prepare a mixture of 50% paraffin wax and 50% stearic acid, press it into a mold with the same size as the reinforcement using a wax press, and obtain a wax mold after solidification.

[0037] (3) After the wax model is coated with paint (a mixture of quartz powder and water glass adhesive), a mixed ceramic powder of Al2O3, ZrO2, and TiC with a particle size of 10 mesh is sprinkled on it, and then it is placed in an ammonium chloride solution to complete the hardening process; subsequently, the paint is applied again, and the mixed ceramic powder with a particle size of 14 mesh is sprinkled on it, and the hardening process is repeated; this process is repeated in sequence, with the ceramic powder particle sizes being changed to 20 mesh, 40 mesh, 100 mesh, 200 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, and 10 mesh respectively; after melting the wax and drying, a three-dimensional ceramic model with a "porous-microporous-non-porous-microporous-porous" change in its inner and outer surfaces is obtained, such as Figure 4 As shown.

[0038] (4) After splicing the three-dimensional ceramic mold with the ingate and the sprue, place it into the sand box; after vibration, melt ZG Mn13 manganese steel and pour it into the sand box. The ZG Mn13 manganese steel gradually fills the surface holes of the three-dimensional ceramic mold to form a gradient transition interface between manganese steel and ceramic, and finally obtains the ceramic-manganese steel skeleton.

[0039] (5) Prepare rubber in the following proportions: wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizing agent = 100: 6: 30: 1: 5: 5: 8: 2: 1; after heating and softening, inject the softened rubber into the ceramic-manganese steel skeleton. The rubber gradually fills the pores on the inner surface of the three-dimensional ceramic mold, forming a gradient transition interface between ceramic and rubber. After cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0040] The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared using the method of this embodiment exhibits the following impact resistance and abrasion resistance results, as shown in Table 1. Its service life was increased from 15 days for the original alloy steel to 58 days. Impact resistance was characterized by impact toughness; abrasion resistance was measured by hardness, with higher hardness indicating better abrasion resistance.

[0041] Example 2

[0042] This embodiment describes a local high impact energy condition (local impact energy > 100 J / cm²). 2 The lower rubber-ceramic core-shell structure reinforced manganese steel matrix composite liner includes a manganese steel matrix and multiple rubber-ceramic core-shell structure reinforcements embedded in the manganese steel matrix. Each rubber-ceramic core-shell structure reinforcement is nearly cylindrical, with its upper surface flush with the upper surface of the manganese steel matrix, and is composed of a ceramic shell and a rubber core encased within the ceramic shell. A gradient transition exists between the rubber core and the ceramic shell, forming a "core-shell" transition zone; a gradient transition also exists between the ceramic shell and the adjacent manganese steel matrix, forming a "shell-base" transition zone.

[0043] Preparation method ( Figure 3 ):

[0044] (1) The manganese steel matrix is ​​150mm thick, with a high-energy impact zone in the middle (impact energy > 100J / cm). 2 ), at 1 per cm 2 Equally spaced rubber-ceramic core-shell reinforcement; in its peripheral region (100 J / cm 2 Impact energy >50J / cm 2 ), at 0.3 pieces / cm 2 Equally spaced reinforcement; outermost region (impact energy below 20 J / cm²) 2 It has low impact energy and does not require reinforcement. The reinforcement has a diameter of 25mm and a height of 2 / 3 of the thickness of the manganese steel matrix.

[0045] (2) Prepare a mixture of 50% paraffin wax and 50% stearic acid, press it into a mold with the same size as the reinforcement using a wax press, and obtain a wax mold after solidification.

[0046] (3) After the wax model is coated with paint (a mixture of quartz powder and water glass adhesive), Al2O3 ceramic powder with a particle size of 10 mesh is sprinkled on it, and then it is placed in ammonium chloride solution to complete the hardening. Then, the paint is applied again, and mixed ceramic powder with a particle size of 20 mesh is sprinkled on it, and then it is hardened again. This process is repeated, with the steps of applying paint, sprinkling ceramic powder, and hardening performed in sequence, and the particle size of the ceramic powder is changed to 40 mesh, 100 mesh, 200 mesh, 100 mesh, 40 mesh, 20 mesh, and 10 mesh in sequence. After melting the wax and drying, a three-dimensional ceramic model with a "porous-microporous-non-porous-microporous-porous" change in the inner and outer surfaces is obtained.

[0047] (4) After splicing the three-dimensional ceramic mold with the ingate and the sprue, place it into the sand box; after vibration, melt ZG Mn17 manganese steel and pour it into the sand box. The ZG Mn17 manganese steel gradually fills the surface holes of the three-dimensional ceramic mold to form a gradient transition interface between manganese steel and ceramic, and finally obtains the ceramic-manganese steel skeleton.

[0048] (5) Prepare rubber in the following proportions: wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizing agent = 100: 6: 30: 1: 5: 5: 8: 2: 1; after heating and softening, inject the softened rubber into the ceramic-manganese steel skeleton. The rubber gradually fills the pores on the inner surface of the three-dimensional ceramic mold, forming a gradient transition interface between ceramic and rubber. After cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0049] The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared using the method of this embodiment exhibits the following impact resistance and abrasion resistance results, as shown in Table 1. Its service life was increased from 18 days for the original alloy steel to 75 days. Impact resistance was characterized by impact toughness; abrasion resistance was measured by hardness, with higher hardness indicating better abrasion resistance.

[0050] Example 3

[0051] This embodiment describes a localized low to medium impact energy condition (localized 100 J / cm). 2 Impact energy >50J / cm 2 The lower rubber-ceramic core-shell structure reinforced manganese steel matrix composite liner includes a manganese steel matrix and multiple rubber-ceramic core-shell structure reinforcements embedded in the manganese steel matrix. Each rubber-ceramic core-shell structure reinforcement is nearly cylindrical, with its upper surface flush with the upper surface of the manganese steel matrix, and is composed of a ceramic shell and a rubber core encased within the ceramic shell. A gradient transition exists between the rubber core and the ceramic shell, forming a "core-shell" transition zone; a gradient transition also exists between the ceramic shell and the adjacent manganese steel matrix, forming a "shell-base" transition zone.

[0052] Preparation method ( Figure 3 ):

[0053] (1) The thickness of the manganese steel matrix is ​​100mm, with 100J / cm² in the middle. 2 Impact energy >50J / cm 2 (Area) at 0.3 per cm 2 Equally spaced rubber-ceramic core-shell reinforcements, with 50 J / cm² on their periphery. 2 Impact energy >20J / cm 2 (Area) at 0.1 per cm 2 Equally spaced reinforcements, with other locations having impact energy below 20 J / cm².2 No reinforcement is installed in the area. The reinforcement has a diameter of 30 mm and a height of 2 / 3 of the liner thickness.

[0054] (2) Prepare a mixture of 50% paraffin wax and 50% stearic acid, press it into a mold with the same size as the reinforcement using a wax press, and obtain a wax mold after solidification.

[0055] (3) After the wax model is coated with paint (a mixture of quartz powder and water glass adhesive), it is sprinkled with Al2O3 and TiC mixed ceramic powder with a particle size of 10 mesh, and then placed in ammonium chloride solution to complete the hardening. Then, the paint is applied again, and mixed ceramic powder with a particle size of 14 mesh is sprinkled, and then hardening is carried out again. This process is repeated, with the steps of applying paint, sprinkling ceramic powder, and hardening carried out in sequence, and the particle size of the ceramic powder is changed in sequence to 20 mesh, 40 mesh, 100 mesh, 200 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, and 10 mesh. After melting the wax and drying, a three-dimensional ceramic model with a "porous-microporous-non-porous-microporous-porous" change in the inner and outer surfaces is obtained.

[0056] (4) After splicing the three-dimensional ceramic mold with the ingate and the sprue, place it into the sand box; after vibration, melt ZG Mn13 manganese steel and pour it into the sand box. The ZG Mn13 manganese steel gradually fills the surface holes of the three-dimensional ceramic mold to form a gradient transition interface between manganese steel and ceramic, and finally obtains the ceramic-manganese steel skeleton.

[0057] (5) Prepare rubber in the following proportions: wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizing agent = 100: 6: 30: 1: 5: 5: 8: 2: 1; after heating and softening, inject the softened rubber into the ceramic-manganese steel skeleton. The rubber gradually fills the pores on the inner surface of the three-dimensional ceramic mold, forming a gradient transition interface between ceramic and rubber. After cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0058] The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared using the method of this embodiment exhibits the following impact resistance and abrasion resistance results, as shown in Table 1. Its service life was increased from 20 days for the original alloy steel to 80 days. Impact resistance was characterized by impact toughness; abrasion resistance was measured by hardness, with higher hardness indicating better abrasion resistance.

[0059] Example 4

[0060] This embodiment presents a low impact energy condition (50J / cm). 2 Impact energy >20J / cm 2The lower rubber-ceramic core-shell structure reinforced manganese steel matrix composite liner includes a manganese steel matrix and multiple rubber-ceramic core-shell structure reinforcements embedded in the manganese steel matrix. Each rubber-ceramic core-shell structure reinforcement is nearly cylindrical, with its upper surface flush with the upper surface of the manganese steel matrix, and is composed of a ceramic shell and a rubber core encased within the ceramic shell. A gradient transition exists between the rubber core and the ceramic shell, forming a "core-shell" transition zone; a gradient transition also exists between the ceramic shell and the adjacent manganese steel matrix, forming a "shell-base" transition zone.

[0061] Preparation method ( Figure 3 ):

[0062] (1) The thickness of the manganese steel substrate is 80mm, and the density is 0.1 particles / cm. 2 The rubber-ceramic core-shell structure reinforcement is evenly distributed, with a diameter of 25 mm and a height of 2 / 3 of the liner thickness.

[0063] (2) Prepare a mixture of 50% paraffin wax and 50% stearic acid, press it into a mold with the same size as the reinforcement using a wax press, and obtain a wax mold after solidification.

[0064] (3) After the wax model is coated with paint (a mixture of quartz powder and water glass adhesive), TiC ceramic powder with a particle size of 10 mesh is sprinkled on it, and then it is placed in ammonium chloride solution to complete the hardening. Then, the paint is applied again, and mixed ceramic powder with a particle size of 14 mesh is sprinkled on it, and then it is hardened again. This process is repeated, with the steps of applying paint, sprinkling ceramic powder, and hardening performed in sequence, and the particle size of the ceramic powder is changed to 20 mesh, 40 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, and 10 mesh in sequence. After melting the wax and drying, a three-dimensional ceramic model with a "porous-microporous-non-porous-microporous-porous" change in the inner and outer surfaces is obtained.

[0065] (4) After splicing the three-dimensional ceramic mold with the ingate and the sprue, place it into the sand box; after vibration, melt ZG Mn13 manganese steel and pour it into the sand box. The ZG Mn13 manganese steel gradually fills the surface holes of the three-dimensional ceramic mold to form a gradient transition interface between manganese steel and ceramic, and finally obtains the ceramic-manganese steel skeleton.

[0066] (5) Prepare rubber in the following proportions: wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizing agent = 100: 6: 30: 1: 5: 5: 8: 2: 1; after heating and softening, inject the softened rubber into the ceramic-manganese steel skeleton. The rubber gradually fills the pores on the inner surface of the three-dimensional ceramic mold, forming a gradient transition interface between ceramic and rubber. After cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0067] The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared using the method of this embodiment exhibits the following impact resistance and abrasion resistance results, as shown in Table 1. Its service life was increased from 30 days for the original alloy steel to 90 days. Impact resistance was characterized by impact toughness; abrasion resistance was measured by hardness, with higher hardness indicating better abrasion resistance.

[0068] Table 1. Impact resistance and abrasion resistance results of the composite liner plates in various embodiments of the present invention.

[0069] parameter Example 1 Example 2 Example 3 Example 4 Hardness HRC 46.5 48 53.5 54.5 <![CDATA[Impact toughness J / cm 2 > 16.5 11.5 16.5 14

[0070] Based on the above embodiments and corresponding data results, it can be seen that the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner of the present invention integrates the characteristics of manganese steel, ceramics, and rubber, giving full play to the wear resistance of ceramics, the impact resistance of rubber, and the work hardening effect of manganese steel, thus significantly improving the service life of the liner.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rubber-ceramic core-shell structure reinforced manganese steel-based composite liner, characterized in that, It includes a manganese steel matrix and a plurality of rubber-ceramic core-shell structure reinforcements embedded in the manganese steel matrix; the rubber-ceramic core-shell structure reinforcements are respectively composed of a ceramic shell and a rubber core covering the inside of the ceramic shell, and there is a gradient transition between the rubber core and the ceramic shell, and there is also a gradient transition between the ceramic shell and the adjacent manganese steel matrix.

2. The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 1, characterized in that, The upper surface of the rubber-ceramic core-shell structure reinforcement is flush with the upper surface of the manganese steel substrate, with a diameter of 25~50mm and a height of 2 / 3 of the liner thickness.

3. The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 1, characterized in that, The distribution of the multiple rubber-ceramic core-shell reinforcements in the manganese steel matrix is ​​determined based on the impact force of the ore at the application location of the liner, specifically: impact energy > 100 J / cm². 2 Area, 1 per cm 2 Equally spaced distribution; 100 J / cm 2 Impact energy >50J / cm 2 Area, at 0.3 per cm 2 Equally spaced distribution; 50 J / cm 2 Impact energy >20J / cm 2 Area, at 0.1 cells / cm 2 Equally spaced distribution; impact energy less than 20 J / cm 2 In the area, no rubber-ceramic core-shell reinforcement is placed.

4. A method for preparing a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner as described in any one of claims 1 to 3, characterized in that, Includes the following steps: S1. Based on the ore drop point, design the distribution of the rubber-ceramic core-shell structure reinforcement in the manganese steel matrix; S2. Prepare a wax model according to the distribution of the rubber-ceramic core-shell structure reinforcement; repeatedly apply coating, sprinkle ceramic sand, and harden the wax model, so that the particle size of the ceramic sand in the overall operation decreases from large to small and then increases from small to large; after melting the wax and drying, a three-dimensional ceramic model is obtained. S3. After assembling the three-dimensional ceramic mold with the ingate and sprue, place it in the sand box; after compaction, melt the manganese steel material and pour it into the sand box to obtain the ceramic-manganese steel skeleton. S4. Inject the heated and softened rubber into the ceramic-manganese steel skeleton to form a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner.

5. The method for preparing the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 4, characterized in that, In step S2, the wax model is made of a mixture of 50% paraffin wax and 50% stearic acid, which is pressed into a mold using a wax press and solidified to obtain the wax model.

6. The method for preparing the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 4, characterized in that, In step S2, the coating is a mixture of quartz powder and water glass adhesive; the ceramic sand is at least one of Al2O3, ZrO2, and TiC; and the hardening process is completed in an ammonium chloride solution.

7. The method for preparing the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 4, characterized in that, In step S2, the ceramic sand particle size is selected from 10 mesh to 200 mesh.

8. The method for preparing the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 4, characterized in that, In step S3, the manganese steel material used is medium or high manganese steel.

9. The method for preparing the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 4, characterized in that, In step S4, the rubber used is wear-resistant rubber.

10. The application of a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner as described in any one of claims 1 to 3 as a liner material for a semi-autogenous grinding mill feed trolley.

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