High abrasion resistant coal mine steel cord belting with a coating modified surface

Abstract

This invention discloses a high wear-resistant flame-retardant conveyor belt for coal mines with a coated modified surface, comprising a steel wire rope core, an upper cover rubber layer and a lower cover rubber layer disposed on both sides of the steel wire rope core, wherein the upper cover rubber layer is provided with a coated modified canvas layer to form a composite cover layer, the coated modified canvas layer is composed of canvas and a wear-resistant rubber coating disposed on the canvas, and the raw material components of the upper cover rubber layer include, by weight: 100 parts of ethylene propylene diene monomer (EPDM) rubber, 5-8 parts of nano zinc oxide, 1-2 parts of stearic acid, 3-5 parts of antioxidant MB, 1-3 parts of heat oxidation resistant agent RD, 2-5 parts of light magnesium oxide, 4-6 parts of magnesium methacrylate, 4-6 parts of phenolic resin, 40-60 parts of carbon black N-220, 4-6 parts of silica, 12-16 parts of paraffin oil 300#, 1-3 parts of liquid polybutene, 3-4 parts of crosslinking agent PDM, and 4-5 parts of vulcanizing agent DCP. This conveyor belt has good flame retardant properties and high wear resistance by using a composite coating modified canvas layer on the surface of the cover rubber layer.

Description

Technical Field

[0001] This invention relates to the field of rubber conveyor belt manufacturing technology, and specifically to a high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface. Background Technology

[0002] Flame-retardant steel cord conveyor belts possess excellent flame-retardant and anti-static properties, making them suitable for long-distance, high-volume coal transportation operations in underground coal mines. MT / T 668-2019, "Flame-retardant Steel Cord Conveyor Belts for Coal Mines," is the current and latest standard for flame-retardant steel cord conveyor belts used in coal mines. While current flame-retardant steel cord conveyor belts for coal mines have achieved good flame-retardant effects and can generally meet high-strength requirements, they still suffer from drawbacks such as poor wear resistance, short service life, and low tensile strength of the covering rubber layer.

[0003] Graphene is a high-strength material that can play a good reinforcing role in rubber as a filler, increasing the wear resistance of rubber. However, graphene is expensive, and its large-scale use as a filler is costly. Furthermore, the addition of graphene to rubber can easily cause agglomeration, affecting the uniformity of dispersion of other additives in the rubber and thus impacting the performance of the rubber product. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface. This conveyor belt has good flame-retardant properties and high wear resistance by composite coating modified canvas layer on the surface of the covering rubber layer.

[0005] For rubber conveyor belts, the present invention provides the following technical solution:

[0006] A high-wear-resistant, flame-retardant conveyor belt for coal mines with a coated and modified surface, comprising a steel wire rope core, and an upper and lower cover rubber layer disposed on both sides of the steel wire rope core. The upper cover rubber layer has a coated and modified canvas layer on its upper surface, forming a composite cover layer. The coated and modified canvas layer consists of canvas and a wear-resistant rubber coating disposed on the canvas. The raw material components of the upper cover rubber layer, by weight, include:

[0007]

[0008] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the raw material components of the upper covering rubber layer include, by weight:

[0009]

[0010]

[0011] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the phenolic resin is CH-ED, a special tackifying resin for ethylene propylene rubber.

[0012] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the canvas in the coated modified canvas layer is a pure cotton canvas woven from pure cotton yarn.

[0013] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the canvas in the coated modified canvas layer is flame-retardant canvas.

[0014] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the radial density of the canvas in the coated modified canvas layer is 100±5 strands / 10cm, the weft density is 80±5 strands / 10cm, and the thickness is 0.2mm±0.05.

[0015] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the wear-resistant rubber coating raw material components include, by weight:

[0016]

[0017]

[0018] Furthermore, as an optimization, in the aforementioned high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface, the wear-resistant rubber coating raw material components include, by weight:

[0019]

[0020] Furthermore, as an optimized approach, the aforementioned high-wear-resistant steel wire rope core flame-retardant conveyor belt with a coated modified surface for coal mines is prepared according to the following steps:

[0021] S1, at a temperature below 40℃, add ethylene propylene diene monomer (EPDM) rubber, nano zinc oxide, stearic acid, antioxidant MB, heat oxidizing agent, and light magnesium oxide into a mixer, pressurize and mix for 150-200 seconds, then add carbon black, paraffin oil, silica, and liquid polybutene, mix for 110-130 seconds, discharge the rubber and sheet, the discharge temperature should not exceed 140℃, and cool to obtain a first-stage compound A;

[0022] S2, add the first-stage compound A prepared in step S1, magnesium methacrylate, and phenolic resin to a mixer, pressurize and mix for 140-160 seconds, and after mixing to a temperature of 100-105℃, discharge the compound, sheet and cool to obtain the second-stage compound B.

[0023] S3, mix the crosslinking agent, vulcanizing agent and the two-stage compound B prepared in step S2 into the internal mixer, mix for 90-100 seconds, control the temperature at 50-60℃, and discharge the compound.

[0024] S4 is prepared by guiding the rolling process on an open mill, passing through the thin sheet 3-4 times, adjusting the roller gap, controlling the sheet thickness to 5.0±0.2mm, forming a triangular wrap 4-5 times, and rolling it 2-3 times before extruding the sheet. It is then left to cool at room temperature for 24 hours to obtain the top cover rubber compound for later use.

[0025] S5, add styrene-butadiene rubber, nano zinc oxide, stearic acid, antioxidant RD, carbon black, pine tar, coumarone resin, aromatic oil, sulfur, accelerator CBS, and graphene pre-dispersed styrene-butadiene rubber masterbatch to a mixer and mix for 2-3 minutes. Control the temperature at 100-110℃ and discharge the rubber. Use an open mill for guided mixing and thin-pass triangular wrapping 3-5 times to control the sheet thickness at 0.2-0.3mm. Discharge the sheet and cool it at room temperature for 24 hours to obtain the wear-resistant rubber coating compound for later use.

[0026] S6, the wear-resistant rubber coating compound and the canvas are fed into the calender, and the wear-resistant rubber coating compound is calendered onto the surface of the canvas. The total thickness of the canvas and the wear-resistant rubber coating is controlled to be 0.3mm±0.05mm to obtain the coated modified canvas.

[0027] S7. The upper cover rubber compound obtained in step S4, the steel wire rope core, the coated modified canvas obtained in step S6, and the pre-prepared lower cover rubber compound are cold-pressed on a cold press to form a strip blank. The strip blank is then vulcanized on a flat vulcanizing machine to obtain the product.

[0028] As an optimization, the raw materials and preparation method of the lower cover rubber compound used in step S7 are the same as those of the upper cover rubber compound.

[0029] Compared with the prior art, the high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface of the present invention has achieved the following beneficial technical effects:

[0030] The conveyor belt cover rubber layer of this invention uses ethylene propylene diene monomer (EPDM) rubber as raw rubber, and adds specific materials such as nano zinc oxide, stearic acid, light magnesium oxide, magnesium methacrylate, phenolic resin, silica, and liquid polybutene in appropriate proportions to give the cover rubber layer good flame retardancy. The wear-resistant rubber coating incorporates graphene pre-dispersed styrene-butadiene rubber masterbatch to modify the rubber. The graphene pre-dispersed styrene-butadiene rubber masterbatch has good dispersion performance, effectively reducing the agglomeration of additives and giving the coated and modified canvas high wear resistance. Using canvas of specific specifications and a specific formulation for the wear-resistant rubber coating enhances the fluidity of the rubber compound, allowing it to fully penetrate the canvas during calendering and resulting in high bonding strength after vulcanization. Graphene is only used in the wear-resistant rubber coating, requiring a small amount, effectively reducing production costs. The conveyor belt prepared using the cover rubber layer and coated and modified canvas of this invention has improved wear resistance and tensile properties, making it better suited for high-intensity, long-distance, and high-volume material conveying in coal mines. The high wear resistance also better ensures the conveyor belt can be used for extended periods, saving costs. Detailed Implementation

[0031] The technical solution of the present invention will be further described in detail below through specific embodiments. In the present invention, unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. Unless otherwise specified, the methods and equipment in the following embodiments are conventional methods and equipment in the art.

[0032] Example 1

[0033] In this embodiment, a high-wear-resistant, flame-retardant conveyor belt for coal mines with a coated and modified surface includes a steel wire rope core, and an upper and lower cover rubber layer disposed on both sides of the steel wire rope core. The upper cover rubber layer has a coated and modified canvas layer on its upper surface. The coated and modified canvas layer consists of canvas and a wear-resistant rubber coating disposed on the canvas. The raw material components of the upper cover rubber layer, by weight, include:

[0034]

[0035]

[0036] In this embodiment, the phenolic resin is CH-ED, a special tackifying resin for ethylene propylene rubber.

[0037] In this embodiment, the canvas in the coated modified canvas layer is a pure cotton canvas woven from pure cotton yarn.

[0038] In this embodiment, the canvas in the coating-modified canvas layer is flame-retardant canvas.

[0039] In this embodiment, the radial density of the canvas in the coated modified canvas layer is 100 threads / 10cm, the weft density is 80 threads / 10cm, and the thickness is 0.2mm.

[0040] In this embodiment, the raw material components of the wear-resistant adhesive coating include, by weight:

[0041]

[0042] In this embodiment, the above-mentioned high wear-resistant steel wire rope core flame-retardant conveyor belt with a coated modified surface for coal mines is prepared according to the following steps:

[0043] S1, at a temperature below 40℃, add ethylene propylene diene monomer (EPDM), nano zinc oxide, stearic acid, antioxidant MB, heat oxidant, and light magnesium oxide into a mixer, pressurize and mix for 180 seconds, then add carbon black, paraffin oil, silica, and liquid polybutene, mix for 130 seconds, discharge the rubber and sheet, the discharge temperature should not exceed 140℃, and cool to obtain a first-stage compound A;

[0044] S2, add the first-stage compound A prepared in step S1, magnesium methacrylate, and phenolic resin to a mixer, pressurize and mix for 150 seconds, and after mixing to a temperature of 100°C, discharge the compound, sheet and cool to obtain the second-stage compound B.

[0045] S3, mix the crosslinking agent, vulcanizing agent and the two-stage compound B prepared in step S2 and add them to the internal mixer, mix for 90 seconds, control the temperature at 55℃, and discharge the compound.

[0046] S4, is guided through the open mill, thinly passed 4 times, the roller gap is adjusted to control the film thickness to 5.0mm, the film is formed into a triangular bundle 4 times, and then rolled 3 times before being extruded. It is then placed at room temperature to cool for 24 hours to obtain the top cover rubber compound for later use.

[0047] S5, add styrene-butadiene rubber, nano zinc oxide, stearic acid, antioxidant RD, carbon black, pine tar, coumarone resin, aromatic oil, sulfur, accelerator CBS, and graphene pre-dispersed styrene-butadiene rubber masterbatch into an internal mixer, mix for 3 minutes, control the temperature at 105℃ to discharge the rubber, use an open mill for guided mixing, thin pass triangular wrapping 4 times, control the rubber sheet thickness to 0.2mm, discharge the sheet, cool at room temperature for 24 hours to obtain wear-resistant rubber coating compound, for later use;

[0048] S6, the wear-resistant rubber coating compound and the canvas are fed into the calender, and the wear-resistant rubber coating compound is calendered onto the surface of the canvas. The total thickness of the canvas and the wear-resistant rubber coating is controlled to be 0.3 mm to obtain the coated modified canvas.

[0049] S7. The upper cover rubber compound obtained in step S4, the steel wire rope core, the coated modified canvas obtained in step S6, and the pre-prepared lower cover rubber compound are cold-pressed on a cold press to form a strip blank. The strip blank is then vulcanized on a flat vulcanizing machine to obtain the product.

[0050] Furthermore, the raw materials and preparation method of the lower cover rubber compound used in step S7 are the same as those of the upper cover rubber compound.

[0051] Example 2

[0052] In this embodiment, a high-wear-resistant, flame-retardant conveyor belt for coal mines with a coated and modified surface includes a steel wire rope core, and an upper and lower cover rubber layer disposed on both sides of the steel wire rope core. The upper cover rubber layer has a coated and modified canvas layer on its upper surface, forming a composite cover layer. The coated and modified canvas layer consists of canvas and a wear-resistant rubber coating disposed on the canvas. The raw material components of the upper cover rubber layer, by weight, include:

[0053]

[0054] In this embodiment, the phenolic resin is CH-ED, a special tackifying resin for ethylene propylene rubber.

[0055] In this embodiment, the canvas in the coated modified canvas layer is a pure cotton canvas woven from pure cotton yarn.

[0056] In this embodiment, the canvas in the coating-modified canvas layer is flame-retardant canvas.

[0057] In this embodiment, the radial density of the canvas in the coated modified canvas layer is 100 threads / 10cm, the weft density is 80 threads / 10cm, and the thickness is 0.2mm.

[0058] In this embodiment, the raw material components of the wear-resistant adhesive coating include, by weight:

[0059]

[0060]

[0061] In this embodiment, the above-mentioned high wear-resistant steel wire rope core flame-retardant conveyor belt with a coated modified surface for coal mines is prepared according to the following steps:

[0062] S1, at a temperature below 40℃, add ethylene propylene diene monomer (EPDM), nano zinc oxide, stearic acid, antioxidant MB, heat oxidant, and light magnesium oxide into a mixer, pressurize and mix for 180 seconds, then add carbon black, paraffin oil, silica, and liquid polybutene, mix for 130 seconds, discharge the rubber and sheet, the discharge temperature should not exceed 140℃, and cool to obtain a first-stage compound A;

[0063] S2, add the first-stage compound A prepared in step S1, magnesium methacrylate, and phenolic resin to a mixer, pressurize and mix for 150 seconds, and after mixing to a temperature of 100°C, discharge the compound, sheet and cool to obtain the second-stage compound B.

[0064] S3, mix the crosslinking agent, vulcanizing agent and the two-stage compound B prepared in step S2 and add them to the internal mixer, mix for 90 seconds, control the temperature at 55℃, and discharge the compound.

[0065] S4, is guided through the open mill, thinly passed 4 times, the roller gap is adjusted to control the film thickness to 5.0mm, the film is formed into a triangular bundle 4 times, and then rolled 3 times before being extruded. It is then placed at room temperature to cool for 24 hours to obtain the top cover rubber compound for later use.

[0066] S5, add styrene-butadiene rubber, nano zinc oxide, stearic acid, antioxidant RD, carbon black, pine tar, coumarone resin, aromatic oil, sulfur, accelerator CBS, and graphene pre-dispersed styrene-butadiene rubber masterbatch into an internal mixer, mix for 3 minutes, control the temperature at 105℃ to discharge the rubber, use an open mill for guided mixing, thin pass triangular wrapping 4 times, control the rubber sheet thickness to 0.2mm, discharge the sheet, cool at room temperature for 24 hours to obtain wear-resistant rubber coating compound, for later use;

[0067] S6, the wear-resistant rubber coating compound and the canvas are fed into the calender, and the wear-resistant rubber coating compound is calendered onto the surface of the canvas. The total thickness of the canvas and the wear-resistant rubber coating is controlled to be 0.3 mm to obtain the coated modified canvas.

[0068] S7. The upper cover rubber compound obtained in step S4, the steel wire rope core, the coated modified canvas obtained in step S6, and the pre-prepared lower cover rubber compound are cold-pressed on a cold press to form a strip blank. The strip blank is then vulcanized on a flat vulcanizing machine to obtain the product.

[0069] Furthermore, the raw materials and preparation method of the lower cover rubber compound used in step S7 are the same as those of the upper cover rubber compound.

[0070] Example 3

[0071] In this embodiment, a high-wear-resistant, flame-retardant conveyor belt for coal mines with a coated and modified surface includes a steel wire rope core, and an upper and lower cover rubber layer disposed on both sides of the steel wire rope core. The upper cover rubber layer has a coated and modified canvas layer on its upper surface, forming a composite cover layer. The coated and modified canvas layer consists of canvas and a wear-resistant rubber coating disposed on the canvas. The raw material components of the upper cover rubber layer, by weight, include:

[0072]

[0073]

[0074] In this embodiment, the phenolic resin is CH-ED, a special tackifying resin for ethylene propylene rubber.

[0075] In this embodiment, the canvas in the coated modified canvas layer is a pure cotton canvas woven from pure cotton yarn.

[0076] In this embodiment, the canvas in the coating-modified canvas layer is flame-retardant canvas.

[0077] In this embodiment, the radial density of the canvas in the coated modified canvas layer is 100 threads / 10cm, the weft density is 80 threads / 10cm, and the thickness is 0.2mm.

[0078] In this embodiment, the raw material components of the wear-resistant adhesive coating include, by weight:

[0079]

[0080] In this embodiment, the above-mentioned high wear-resistant steel wire rope core flame-retardant conveyor belt with a coated modified surface for coal mines is prepared according to the following steps:

[0081] S1, at a temperature below 40℃, add ethylene propylene diene monomer (EPDM), nano zinc oxide, stearic acid, antioxidant MB, heat oxidant, and light magnesium oxide into a mixer, pressurize and mix for 180 seconds, then add carbon black, paraffin oil, silica, and liquid polybutene, mix for 130 seconds, discharge the rubber and sheet, the discharge temperature should not exceed 140℃, and cool to obtain a first-stage compound A;

[0082] S2, add the first-stage compound A prepared in step S1, magnesium methacrylate, and phenolic resin to a mixer, pressurize and mix for 150 seconds, and after mixing to a temperature of 100°C, discharge the compound, sheet and cool to obtain the second-stage compound B.

[0083] S3, mix the crosslinking agent, vulcanizing agent and the two-stage compound B prepared in step S2 and add them to the internal mixer, mix for 90 seconds, control the temperature at 55℃, and discharge the compound.

[0084] S4, is guided through the open mill, thinly passed 4 times, the roller gap is adjusted to control the film thickness to 5.0mm, the film is formed into a triangular bundle 4 times, and then rolled 3 times before being extruded. It is then placed at room temperature to cool for 24 hours to obtain the top cover rubber compound for later use.

[0085] S5, add styrene-butadiene rubber, nano zinc oxide, stearic acid, antioxidant RD, carbon black, pine tar, coumarone resin, aromatic oil, sulfur, accelerator CBS, and graphene pre-dispersed styrene-butadiene rubber masterbatch into an internal mixer, mix for 3 minutes, control the temperature at 105℃ to discharge the rubber, use an open mill for guided mixing, thin pass triangular wrapping 4 times, control the rubber sheet thickness to 0.2mm, discharge the sheet, cool at room temperature for 24 hours to obtain wear-resistant rubber coating compound, for later use;

[0086] S6, the wear-resistant rubber coating compound and the canvas are fed into the calender, and the wear-resistant rubber coating compound is calendered onto the surface of the canvas. The total thickness of the canvas and the wear-resistant rubber coating is controlled to be 0.3 mm to obtain the coated modified canvas.

[0087] S7. The upper cover rubber compound obtained in step S4, the steel wire rope core, the coated modified canvas obtained in step S6, and the pre-prepared lower cover rubber compound are cold-pressed on a cold press to form a strip blank. The strip blank is then vulcanized on a flat vulcanizing machine to obtain the product.

[0088] Furthermore, the raw materials and preparation method of the lower cover rubber compound used in step S7 are the same as those of the upper cover rubber compound.

[0089] Comparative Example 1

[0090] In this comparative example, the flame-retardant conveyor belt with steel wire rope core for coal mines includes a steel wire rope core, and an upper cover rubber layer and a lower cover rubber layer disposed on both sides of the steel wire rope core. The raw material components of the upper cover rubber layer include, by weight, the following:

[0091]

[0092] In this comparative example, the phenolic resin is CH-ED, a special tackifying resin for ethylene propylene rubber.

[0093] In this comparative example, the conveyor belt was prepared according to the following steps:

[0094] S1, at a temperature below 40℃, add ethylene propylene diene monomer (EPDM), nano zinc oxide, stearic acid, antioxidant MB, heat oxidant, and light magnesium oxide into a mixer, pressurize and mix for 180 seconds, then add carbon black, paraffin oil, silica, and liquid polybutene, mix for 130 seconds, discharge the rubber and sheet, the discharge temperature should not exceed 140℃, and cool to obtain a first-stage compound A;

[0095] S2, add the first-stage compound A prepared in step S1, magnesium methacrylate, and phenolic resin to a mixer, pressurize and mix for 150 seconds, and after mixing to a temperature of 100°C, discharge the compound, sheet and cool to obtain the second-stage compound B.

[0096] S3, mix the crosslinking agent, vulcanizing agent and the two-stage compound B prepared in step S2 and add them to the internal mixer, mix for 90 seconds, control the temperature at 55℃, and discharge the compound.

[0097] S4, is guided through the open mill, thinly passed 4 times, the roller gap is adjusted to control the film thickness to 5.0mm, the film is formed into a triangular bundle 4 times, and then rolled 3 times before being extruded. It is then placed at room temperature to cool for 24 hours to obtain the top cover rubber compound for later use.

[0098] S5, the upper cover rubber compound, steel wire rope core, and pre-prepared lower cover rubber compound obtained in step S4 are cold-pressed on a cold press to form a strip blank, and the strip blank is vulcanized on a flat vulcanizing machine to obtain the product.

[0099] Furthermore, the raw materials and preparation method of the lower cover rubber compound used in step S5 are the same as those of the upper cover rubber compound.

[0100] The graphene predispersed emulsion styrene-butadiene rubber masterbatch used in all embodiments of the present invention is a product of Chengdu Chuangwei New Material Co., Ltd., with a graphene content of 10wt%.

[0101] Experiments show that the composite coatings obtained in Examples 1-3 can all achieve the objectives of this invention. Relatively speaking, Example 1 is the optimal example, and the high wear-resistant steel wire rope core flame-retardant conveyor belt with a coated modified surface obtained therefrom has the best wear resistance, thereby extending the service life of the conveyor belt. The specific performance indicators of Examples 1-3 and Comparative Example 1 are shown in Table 1 below.

[0102] Vertical burning time and flame retardant rating were tested according to GB / T 2408—2008. Vertical burning time (s) was tested and flame retardant rating was determined based on the measured vertical burning time (s). Tensile strength was tested according to MT / T 668-2019 "Flame-retardant conveyor belts with steel wire rope core for coal mines". Abrasion was tested according to GB / T 9867-2013.

[0103] Table 1

[0104] Vertical combustion time, s 3.6 3.9 3.8 4 Flame retardant rating FV-0 FV-0 FV-0 FV-0 Tensile strength, MPa 32.1 31.4 31.6 18.9 <![CDATA[Abrasion loss, mm 2 > 87 89 90 167

[0105] The foregoing general description of the invention and its specific embodiments should not be construed as limiting the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or embodiments without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A high-wear-resistant, flame-retardant conveyor belt with a coated and modified surface for coal mines, characterized in that: It includes a steel wire rope core, and an upper cover rubber layer and a lower cover rubber layer disposed on both sides of the steel wire rope core. The upper cover rubber layer has a coated modified canvas layer on its upper surface, forming a composite cover layer. The coated modified canvas layer consists of canvas and a wear-resistant rubber coating disposed on the canvas. The raw material components of the upper cover rubber layer include, by weight: 100 parts of ethylene propylene diene monomer (EPDM) rubber, 5-8 parts of nano zinc oxide. Stearic acid 1-2 parts, antioxidant MB 3-5 parts, Heat-resistant oxidation agent RD 1-3 parts, light magnesium oxide 2-5 parts, Magnesium methacrylate 4-6 parts, phenolic resin 4-6 parts Carbon black N-220 40-60 parts, silica 4-6 parts Paraffin oil 300# 12-16 parts, liquid polybutene 1-3 parts, Crosslinking agent PDM 3-4 parts, vulcanizing agent DCP 4-5 parts; The canvas in the coated modified canvas layer is made of pure cotton canvas woven from pure cotton yarn; The canvas in the coating-modified canvas layer is flame-retardant canvas; The raw material components of the wear-resistant adhesive coating include, by weight, the following: 100 parts styrene-butadiene rubber, 2-4 parts nano zinc oxide; Stearic acid 1-3 parts, antioxidant RD 3-5 parts; Carbon black N220 25-30 parts, pine tar 5-7 parts; 8-10 parts coumarone resin, 2-4 parts aromatic oil; 1-3 parts sulfur, 1-4 parts CBS accelerator; 6-10 parts of graphene-predispersed styrene-butadiene rubber masterbatch; The conveyor belt is prepared according to the following steps: S1, at a temperature below 40℃, add ethylene propylene diene monomer (EPDM) rubber, nano zinc oxide, stearic acid, antioxidant MB, heat oxidizing agent, and light magnesium oxide into a mixer, pressurize and mix for 150-200 seconds, then add carbon black, paraffin oil, silica, and liquid polybutene, mix for 110-130 seconds, discharge the rubber and sheet, the discharge temperature should not exceed 140℃, and cool to obtain a first-stage compound A; S2, add the first-stage compound A prepared in step S1, magnesium methacrylate, and phenolic resin to a mixer, pressurize and mix for 140-160 seconds, and after mixing to a temperature of 100-105℃, discharge the compound, sheet and cool to obtain the second-stage compound B. S3, mix the crosslinking agent, vulcanizing agent and the two-stage compound B prepared in step S2 into the internal mixer, mix for 90-100 seconds, control the temperature at 50-60℃, and discharge the compound. S4 is prepared by guiding the rolling process on an open mill, passing through the thin sheet 3-4 times, adjusting the roller gap, controlling the sheet thickness to 5.0±0.2mm, forming a triangular wrap 4-5 times, and rolling it 2-3 times before extruding the sheet. It is then left to cool at room temperature for 24 hours to obtain the top cover rubber compound for later use. S5, add styrene-butadiene rubber, nano zinc oxide, stearic acid, antioxidant RD, carbon black, pine tar, coumarone resin, aromatic oil, sulfur, accelerator CBS, and graphene pre-dispersed styrene-butadiene rubber masterbatch to a mixer and mix for 2-3 minutes. Control the temperature at 100-110℃ and discharge the rubber. Use an open mill for guided mixing and thin-pass triangular wrapping 3-5 times to control the sheet thickness at 0.2-0.3mm. Discharge the sheet and cool it at room temperature for 24 hours to obtain the wear-resistant rubber coating compound for later use. S6, the wear-resistant rubber coating compound and the canvas are fed into the calender, and the wear-resistant rubber coating compound is calendered onto the surface of the canvas. The total thickness of the canvas and the wear-resistant rubber coating is controlled to be 0.3mm±0.05mm to obtain the coated modified canvas. S7. The upper cover rubber compound obtained in step S4, the steel wire rope core, the coated modified canvas obtained in step S6, and the pre-prepared lower cover rubber compound are cold-pressed on a cold press to form a strip blank. The strip blank is then vulcanized on a flat vulcanizing machine to obtain the product.

2. The high wear-resistant, flame-retardant conveyor belt with a coated modified surface for coal mines, characterized in that, The raw material components of the upper coating adhesive layer include, by weight, the following: 100 parts of ethylene propylene diene monomer (EPDM) rubber, 6 parts of nano zinc oxide. Stearic acid 1 part, antioxidant MB 4 parts, 2 parts of heat-resistant oxidation agent RD, 3 parts of light magnesium oxide. Magnesium methacrylate 5 parts, phenolic resin 5 parts Carbon black N-220 53 parts, silica 5 parts Paraffin oil 300# 14 parts, liquid polybutene 2 parts, 3.5 parts of crosslinking agent PDM and 4.4 parts of vulcanizing agent DCP.

3. The high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface as described in claim 2, characterized in that: The phenolic resin is CH-ED, a special tackifying resin for ethylene propylene rubber.

4. The high wear-resistant, flame-retardant conveyor belt with a coated modified surface for coal mines, characterized in that: The coated modified canvas layer has a radial density of 100±5 threads / 10cm, a weft density of 80±5 threads / 10cm, and a thickness of 0.2mm±0.

05.

5. The high wear-resistant, flame-retardant conveyor belt with a coated modified surface for coal mines, characterized in that, The raw material components of the wear-resistant adhesive coating include, by weight, the following: 100 parts styrene-butadiene rubber, 3 parts nano zinc oxide; Stearic acid 2 parts, antioxidant RD 4 parts; Carbon black N220 27 parts, pine tar 6 parts; 9 parts coumarone resin, 3 parts aromatic oil; 2 parts sulfur, 3 parts CBS accelerator; Eight parts of graphene-predispersed styrene-butadiene rubber masterbatch.

6. The high wear-resistant steel wire rope core flame-retardant conveyor belt for coal mines with a coated modified surface according to claim 1, characterized in that: The raw materials and preparation method of the lower cover rubber compound used in step S7 are the same as those of the upper cover rubber compound.

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