Reinforced manganese steel-based composite lining plate with rubber-ceramic core-shell structure as well as preparation and application of reinforced manganese steel-based composite lining plate

Abstract

The invention provides a rubber-ceramic core-shell structure reinforced manganese steel-based composite lining plate. The rubber-ceramic core-shell structure reinforced manganese steel-based composite lining plate comprises a manganese steel base body and a plurality of rubber-ceramic core-shell structure reinforced bodies embedded in the manganese steel base body; each rubber-ceramic core-shell structure reinforcing body is composed of a ceramic shell and a rubber core wrapped in the ceramic shell, the rubber core and the ceramic shell are in gradient transition, and meanwhile, the ceramic shell and the manganese steel base body connected with the ceramic shell are also in gradient transition. The invention further provides a preparation method of the rubber-ceramic core-shell structure reinforced manganese steel-based composite lining plate and application of the rubber-ceramic core-shell structure reinforced manganese steel-based composite lining plate as a semi-autogenous mill feeding trolley lining plate material. According to the lining plate, the characteristics of manganese steel, ceramic and rubber are integrated, the wear resistance of the ceramic, the impact resistance of the rubber and the work hardening effect of the manganese steel are fully exerted, and the service life of the lining plate is remarkably prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of iron-based composite materials and preparation thereof, and in particular to a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner and preparation and application thereof. Background Art

[0002] In recent years, large-scale SAG mills have been widely used in various mineral processing enterprises in China. Due to the increase in the diameter of the SAG mill cylinder, the increase in the ore particle size and the diameter of the grinding balls, the SAG mill feed trolley linings are subjected to high-energy impact and severe wear. The linings have a short service life and are frequently replaced, which causes great waste of material and manpower resources on the production line, seriously restricts the operating efficiency of the equipment, and causes huge economic losses.

[0003] At present, there are three main types of materials used for the lining of the feed trolley of the SAG mill: steel materials such as high manganese steel or low alloy steel, polymer materials represented by natural rubber, and steel-rubber composite wear-resistant materials. Among them, high manganese steel or low alloy steel materials have good wear resistance and moderate impact resistance, and have always been the main material for the lining of the feed trolley. However, with the increase in the diameter of the SAG mill barrel and the increase in the ore particle size and the diameter of the grinding steel balls, insufficient impact resistance has become its main failure mode; at the same time, this type of material is often manufactured by casting, and the inevitable casting defects make it more prone to fragmentation under high impact conditions. Natural rubber materials have elastic deformation characteristics, can effectively absorb the impact energy of the material, and show impact resistance, but natural rubber has a low hardness and poor wear resistance. Especially when resisting the shearing and cutting of irregular shaped ores, it is easy to crack and damage. Steel-rubber composite wear-resistant materials are new composite wear-resistant materials 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 are used in wear-resistant parts such as liners, slurry pump guards, and lifting strips; however, there is no interface diffusion bonding between steel and rubber. If either steel or rubber fails, the entire wear-resistant lining will fail and its service life will be short. 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 lining for a large semi-autogenous mill feeding trolley and its preparation and application, so as to avoid the problems of insufficient impact resistance, insufficient wear resistance and short service life brought about by the use of existing materials.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] A rubber-ceramic core-shell structure reinforced manganese steel-based composite lining comprises a manganese steel substrate and a plurality of rubber-ceramic core-shell structure reinforcements embedded in the manganese steel substrate; the rubber-ceramic core-shell structure reinforcements are respectively composed of a ceramic shell and a rubber core coated inside the ceramic shell, and there is a gradient transition between the rubber core and the ceramic shell to form a "core-shell" transition zone, and at the same time, there is also a gradient transition between the ceramic shell and the adjacent manganese steel substrate to form a "shell-base" 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 to 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 law of the mineral impact force borne by the liner application position, specifically: impact energy>100J / cm 2 Area, 1 piece / cm 2 Equally spaced distribution; 100J / cm 2 >Impact energy>50J / cm 2 Area, 0.3 pieces / cm 2 Equally spaced distribution; 50J / cm 2 >Impact energy>20J / cm 2 Area, 0.1 / cm 2 Equally spaced distribution; impact energy less than 20J / cm 2 In the area, the rubber-ceramic core-shell structure reinforcement is not arranged.

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

[0010] S1. Design the distribution of rubber-ceramic core-shell structure reinforcement in manganese steel matrix according to the mineral material placement;

[0011] S2, preparing a wax mold according to the distribution of the rubber-ceramic core-shell structure reinforcement; repeatedly applying paint, sprinkling ceramic sand, and hardening the wax mold, and making the particle size of the ceramic sand in the overall operation "from large to small, and then from small to large"; after melting the wax and drying, a three-dimensional ceramic mold is obtained;

[0012] S3, splicing the three-dimensional ceramic mold with the ingates and the sprues and placing them in a sand box; after compaction, melting the manganese steel material and pouring it into the sand box to obtain a ceramic-manganese steel skeleton;

[0013] S4. Injecting the rubber in a soft state after heating into the ceramic-manganese steel skeleton to form a rubber-ceramic core-shell structure reinforced manganese steel-based composite lining.

[0014] As one of the preferred embodiments of the present invention, in step S2, the wax mold is made by mixing 50% paraffin wax and 50% stearic acid, and is pressed into the mold by a wax press, and the wax mold is obtained after solidification.

[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 the step S2, the particle size of the ceramic sand is selected in the range of 10 mesh to 200 mesh; for example, the particle size of the ceramic sand can be designed in sequence of "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, 200 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 completed in an ammonium chloride solution.

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

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

[0021] 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.

[0022] An application of the above-mentioned rubber-ceramic core-shell structure reinforced manganese steel-based composite lining plate as a lining plate material for a semi-autogenous mill feeding trolley.

[0023] The advantages of the present 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 combines 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, significantly improving the service life of the liner, reaching more than 3 times that of low-alloy steel wear-resistant liner;

[0025] (2) The present invention uses the gradient change of ceramic particle size as a means, repeatedly applies paint, sprinkles ceramic sand, and hardens the process to achieve the change of "porous-microporous-non-porous-microporous-porous" on the inner and outer surfaces of the ceramic shell, and then compounds with liquid manganese steel material and rubber liquid to achieve the gradient transition interface between manganese steel-ceramic and ceramic-rubber; the gradient transition interface structure can not only give full play to the load transfer effect, but also "pin" 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 distribution of the rubber-ceramic core-shell structure reinforcement of the present invention are controllable and adjustable to meet the requirements of liner performance under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 It is an enlarged structural diagram of the rubber-ceramic core-shell structure reinforcement in Example 1;

[0029] Figure 3 is a flow chart for preparing the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner in Examples 1 to 3;

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

[0031] The following is a detailed description of the embodiments of the present invention. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. At the same time, the materials, equipment and methods used in the following embodiments are all conventional commercially available materials, equipment and methods in the field unless otherwise specified, and will not be repeated.

[0032] Example 1

[0033] A high impact energy condition (impact energy>100 J / cm 2 ) Rubber-ceramic core-shell structure reinforced manganese steel-based composite liner, such as Figure 1 , 2As shown, 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 reinforcement is a nearly cylindrical rod, the upper surface of which is flush with the upper surface of the manganese steel matrix, and is respectively composed of a ceramic shell and a rubber core coated inside the ceramic shell. Among them, there is a gradient transition between the rubber core and the ceramic shell, forming a "core-shell" transition zone, and there is also a gradient transition 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 reinforcements are evenly spaced, with a diameter of 50 mm and a height of 2 / 3 of the thickness of the manganese steel matrix.

[0036] (2) A mixture of 50% paraffin wax and 50% stearic acid is prepared and pressed into a mold having the same size as the reinforcement using a wax press. After solidification, a wax mold is obtained.

[0037] (3) After the wax mold 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 hardening; then, the paint is applied again, and the mixed ceramic powder with a particle size of 14 mesh is sprinkled, and then hardening is performed; and so on, the steps of coating, sprinkling ceramic powder, and hardening are performed in sequence, and the particle sizes of the ceramic powders are changed to 20 mesh, 40 mesh, 100 mesh, 200 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, and 10 mesh in sequence; after melting the wax and drying, a three-dimensional ceramic mold with inner and outer surfaces showing a change of "porous-microporous-non-porous-microporous-porous" is obtained, such as Figure 4 shown.

[0038] (4) The three-dimensional ceramic mold is assembled with the entrant and the sprue and then placed in a sand box; after compaction, the ZG Mn13 manganese steel is melted and poured into the sand box, and the ZG Mn13 manganese steel is gradually filled into the surface gaps of the three-dimensional ceramic mold to form a gradient transition interface between the manganese steel and the ceramic, and finally a ceramic-manganese steel skeleton is obtained.

[0039] (5) preparing rubber in the proportion of wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizer = 100:6:30:1:5:5:8:2:1; after being heated and softened, the softened rubber is injected into the ceramic-manganese steel skeleton, and the rubber is gradually filled into the inner surface pores of the three-dimensional ceramic mold to form a gradient transition interface between ceramic and rubber, and after cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0040] The impact resistance and wear resistance of the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared by the method of this embodiment are shown in Table 1, and the service life is increased from 15 days of the original alloy steel to 58 days. Among them, the impact resistance is characterized by the impact toughness; the wear resistance is measured by hardness, and the higher the hardness, the better the wear resistance.

[0041] Example 2

[0042] A local high impact energy condition (local impact energy> 100 J / cm 2 ) The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner comprises 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 reinforcement is a nearly cylindrical rod, the upper surface of which is flush with the upper surface of the manganese steel matrix, and is respectively composed of a ceramic shell and a rubber core coated inside the ceramic shell. Among them, there is a gradient transition between the rubber core and the ceramic shell to form a "core-shell" transition zone, and there is also a gradient transition between the ceramic shell and the adjacent manganese steel matrix to form a "shell-base" transition zone.

[0043] Preparation method ( Figure 3 ):

[0044] (1) The thickness of the manganese steel substrate is 150 mm, and the high-energy impact area in the middle (impact energy> 100 J / cm 2 ), press 1 piece / cm 2 The rubber-ceramic core-shell structure reinforcement is evenly distributed; in its peripheral area (100J / cm 2 >Impact energy>50J / cm 2 ), according to 0.3 pieces / cm 2 Equally spaced reinforcements; the outermost area (impact energy is less than 20J / cm 2 ), low impact energy, no reinforcement is arranged. The reinforcement diameter is 25mm and the height is 2 / 3 of the thickness of the manganese steel matrix.

[0045] (2) A mixture of 50% paraffin wax and 50% stearic acid is prepared and pressed into a mold having the same size as the reinforcement using a wax press. After solidification, a wax mold is obtained.

[0046] (3) After the wax mold 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 an ammonium chloride solution to complete hardening; then, the paint is applied again, and mixed ceramic powder with a particle size of 20 mesh is sprinkled, and then hardening is performed; and so on, the steps of coating, sprinkling ceramic powder, and hardening are performed in sequence, and the particle sizes of the ceramic powders are 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 mold with inner and outer surfaces showing changes of "porous-microporous-non-porous-microporous-porous" is obtained.

[0047] (4) The three-dimensional ceramic mold is assembled with the entrant and the sprue and then placed in a sand box; after compaction, the ZG Mn17 manganese steel is melted and poured into the sand box, and the ZG Mn17 manganese steel is gradually filled into the surface gaps of the three-dimensional ceramic mold to form a gradient transition interface between the manganese steel and the ceramic, and finally a ceramic-manganese steel skeleton is obtained.

[0048] (5) preparing rubber in the proportion of wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizer = 100:6:30:1:5:5:8:2:1; after being heated and softened, the softened rubber is injected into the ceramic-manganese steel skeleton, and the rubber is gradually filled into the inner surface pores of the three-dimensional ceramic mold to form a gradient transition interface between ceramic and rubber, and after cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0049] The impact resistance and wear resistance of the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared by the method of this embodiment are shown in Table 1, and the service life is increased from 18 days of the original alloy steel to 75 days. Among them, the impact resistance is characterized by the impact toughness; the wear resistance is measured by hardness, and the higher the hardness, the better the wear resistance.

[0050] Example 3

[0051] A local low to medium impact energy condition (local 100 J / cm 2 >Impact energy>50J / cm 2 ) The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner comprises 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 reinforcement is a nearly cylindrical rod, the upper surface of which is flush with the upper surface of the manganese steel matrix, and is respectively composed of a ceramic shell and a rubber core coated inside the ceramic shell. Among them, there is a gradient transition between the rubber core and the ceramic shell to form a "core-shell" transition zone, and there is also a gradient transition between the ceramic shell and the adjacent manganese steel matrix to form a "shell-base" transition zone.

[0052] Preparation method ( Figure 3 ):

[0053] (1) The manganese steel substrate is 100 mm thick and has a strength of 100 J / cm 2 >Impact energy>50J / cm 2 Area) at 0.3 / cm 2 The rubber-ceramic core-shell structure reinforcement is evenly distributed, and the outer periphery (50J / cm 2 >Impact energy>20J / cm 2 Area) at 0.1 / cm 2 Equally spaced reinforcements, other locations (impact energy less than 20J / cm2 The reinforcement is 30 mm in diameter and 2 / 3 of the liner thickness in height.

[0054] (2) A mixture of 50% paraffin wax and 50% stearic acid is prepared and pressed into a mold having the same size as the reinforcement using a wax press. After solidification, a wax mold is obtained.

[0055] (3) After the wax mold is coated with paint (a mixture of quartz powder and water glass adhesive), a mixed ceramic powder of Al2O3 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 hardening; then, the paint is applied again, and the mixed ceramic powder with a particle size of 14 mesh is sprinkled, and then hardening is performed; and so on, the steps of coating, sprinkling ceramic powder, and hardening are performed in sequence, and the particle sizes of the ceramic powders are changed to 20 mesh, 40 mesh, 100 mesh, 200 mesh, 100 mesh, 40 mesh, 20 mesh, 14 mesh, and 10 mesh in sequence; after melting the wax and drying, a three-dimensional ceramic mold with inner and outer surfaces showing "porous-microporous-non-porous-microporous-porous" changes is obtained.

[0056] (4) The three-dimensional ceramic mold is assembled with the entrant and the sprue and then placed in a sand box; after compaction, the ZG Mn13 manganese steel is melted and poured into the sand box, and the ZG Mn13 manganese steel is gradually filled into the surface gaps of the three-dimensional ceramic mold to form a gradient transition interface between the manganese steel and the ceramic, and finally a ceramic-manganese steel skeleton is obtained.

[0057] (5) preparing rubber in the proportion of wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizer = 100:6:30:1:5:5:8:2:1; after being heated and softened, the softened rubber is injected into the ceramic-manganese steel skeleton, and the rubber is gradually filled into the inner surface pores of the three-dimensional ceramic mold to form a gradient transition interface between ceramic and rubber, and after cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0058] The impact resistance and wear resistance of the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared by the method of this embodiment are shown in Table 1, and the service life is increased from 20 days of the original alloy steel to 80 days. Among them, the impact resistance is characterized by the impact toughness; the wear resistance is measured by hardness, and the higher the hardness, the better the wear resistance.

[0059] Example 4

[0060] A lower impact energy condition (50 J / cm 2 >Impact energy>20J / cm 2) The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner comprises 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 reinforcement is a nearly cylindrical rod, the upper surface of which is flush with the upper surface of the manganese steel matrix, and is respectively composed of a ceramic shell and a rubber core coated inside the ceramic shell. Among them, there is a gradient transition between the rubber core and the ceramic shell to form a "core-shell" transition zone, and there is also a gradient transition between the ceramic shell and the adjacent manganese steel matrix to form a "shell-base" transition zone.

[0061] Preparation method ( Figure 3 ):

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

[0063] (2) A mixture of 50% paraffin wax and 50% stearic acid is prepared and pressed into a mold having the same size as the reinforcement using a wax press. After solidification, a wax mold is obtained.

[0064] (3) After the wax mold 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 an ammonium chloride solution to complete hardening; then, the paint is applied again, and mixed ceramic powder with a particle size of 14 mesh is sprinkled, and then hardening is performed; and so on, the steps of coating, sprinkling ceramic powder, and hardening are performed in sequence, and the particle sizes of the ceramic powders are 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 mold with inner and outer surfaces showing "porous-microporous-non-porous-microporous-porous" changes is obtained.

[0065] (4) The three-dimensional ceramic mold is assembled with the entrant and the sprue and then placed in a sand box; after compaction, the ZG Mn13 manganese steel is melted and poured into the sand box, and the ZG Mn13 manganese steel is gradually filled into the surface gaps of the three-dimensional ceramic mold to form a gradient transition interface between the manganese steel and the ceramic, and finally a ceramic-manganese steel skeleton is obtained.

[0066] (5) preparing rubber in the proportion of wear-resistant rubber, natural rubber: composite resin: carbon black: nano zinc powder: boric acid: stearic acid: tetraethyl orthosilicate: elemental silicon powder: vulcanizer = 100:6:30:1:5:5:8:2:1; after being heated and softened, the softened rubber is injected into the ceramic-manganese steel skeleton, and the rubber is gradually filled into the inner surface pores of the three-dimensional ceramic mold to form a gradient transition interface between ceramic and rubber, and after cooling, a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner is obtained.

[0067] The impact resistance and wear resistance of the rubber-ceramic core-shell structure reinforced manganese steel-based composite liner prepared by the method of this embodiment are shown in Table 1, and the service life is increased from 30 days of the original alloy steel to 90 days. Among them, the impact resistance is characterized by the impact toughness; the wear resistance is measured by hardness, and the higher the hardness, the better the wear resistance.

[0068] Table 1 Impact resistance and wear resistance results of the composite liner of each embodiment 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] From the above embodiments and corresponding data results, it can be seen that the rubber-ceramic core-shell structure reinforced manganese steel-based composite lining of the present invention combines the characteristics of manganese steel, ceramics and rubber, gives full play to the wear resistance of ceramics, the impact resistance of rubber and the work hardening effect of manganese steel, and significantly improves the service life of the lining.

[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 in 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 coated inside the ceramic shell, and there is a gradient transition between the rubber core and the ceramic shell. At the same time, 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 is 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, has a diameter of 25 to 50 mm, and a height of 2 / 3 of the thickness of the lining plate.

3. The rubber-ceramic core-shell structure reinforced manganese steel-based composite liner according to claim 1 is characterized in that: The distribution of the multiple rubber-ceramic core-shell structure reinforcements in the manganese steel matrix is ​​determined according to the impact force law of the mineral material borne by the liner application position, specifically: impact energy>100J / cm 2 Area, 1 piece / cm 2 Equally spaced distribution; 100J / cm 2 >Impact energy>50J / cm 2 Area, 0.3 pieces / cm 2 Equally spaced distribution; 50J / cm 2 >Impact energy>20J / cm 2 Area, 0.1 / cm 2 Equally spaced distribution; impact energy less than 20J / cm 2 In the area, the rubber-ceramic core-shell structure reinforcement is not arranged.

4. A method for preparing a rubber-ceramic core-shell structure reinforced manganese steel-based composite liner as claimed in any one of claims 1 to 3, characterized in that: The steps include: S1. Design the distribution of rubber-ceramic core-shell structure reinforcement in manganese steel matrix according to the mineral material placement; S2, preparing a wax mold according to the distribution of the rubber-ceramic core-shell structure reinforcement; repeatedly applying paint, sprinkling ceramic sand, and hardening the wax mold, and making the particle size of the ceramic sand in the overall operation "from large to small, and then from small to large"; after melting the wax and drying, a three-dimensional ceramic mold is obtained; S3, splicing the three-dimensional ceramic mold with the ingates and the sprues and placing them in a sand box; after compaction, melting the manganese steel material and pouring it into the sand box to obtain a ceramic-manganese steel skeleton; S4. Injecting the rubber in a soft state after heating into the ceramic-manganese steel skeleton to form a rubber-ceramic core-shell structure reinforced manganese steel-based composite lining.

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 by mixing 50% paraffin wax and 50% stearic acid, and is pressed into a mold using a wax press to obtain a wax model after solidification.

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 particle size of the ceramic sand is selected in the range of 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 substrate is made of medium or high manganese steel material.

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 the step S4, the rubber is wear-resistant rubber.

10. Use of the rubber-ceramic core-shell structure reinforced manganese steel-based composite lining plate as claimed in any one of claims 1 to 3 as a lining plate material for a semi-autogenous mill feed trolley.

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