Super wear-resistant rubber conveying belt and preparation method thereof

Abstract

The invention relates to the technical field of rubber conveying belts, in particular to a super-wear-resistant rubber conveying belt and a preparation method thereof.The super-wear-resistant rubber conveying belt is prepared by mixing solution polymerized styrene-butadiene rubber and butadiene rubber according to a certain proportion, and by means of high strength and high wear resistance of the solution polymerized styrene-butadiene rubber and good elasticity of the butadiene rubber, complementary advantages can be formed; therefore, the comprehensive performance of the rubber matrix is improved; according to the wear-resistant modified hybrid filler prepared from the graphene powder, the tannic acid, the nano silicon dioxide and the silane coupling agent KH-550, the wear resistance and the hardness of the rubber can be remarkably improved through the enhancement effect of graphene, the filling effect of the nano silicon dioxide and the coupling effect of the silane coupling agent, and moreover, the wear resistance and the hardness of the rubber are improved. The two-dimensional structure of the graphene enables the graphene to form an effective physical crosslinking point in the rubber, the mechanical property and the wear resistance of the rubber can be enhanced, and the nano silicon dioxide can reduce gaps among rubber molecular chains through a filling effect, so that the compactness and the wear resistance of the rubber are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber conveyor belts, and in particular to a super wear-resistant rubber conveyor belt and a preparation method thereof. Background Art

[0002] In industrial production, rubber conveyor belts, as key equipment for material transportation, are widely used in coal, mining, metallurgy, chemical and other industries. With the development of modern industry, higher requirements are placed on the wear resistance, strength and service life of rubber conveyor belts. Although traditional rubber conveyor belts meet basic usage requirements to a certain extent, they often suffer from severe wear and short service life when facing harsh working environments and long-term operation. This not only increases the operating costs of the enterprise, but may also affect production efficiency and safety.

[0003] In order to improve the wear resistance and service life of rubber conveyor belts, researchers have conducted a lot of exploration and practice. Traditional improvement methods mainly focus on adjusting the formula of the rubber matrix, selecting reinforcing materials, and optimizing the vulcanization process. However, these methods often have problems such as limited effect, increased cost or large environmental impact, which makes it difficult to meet the demand of modern industry for high-performance, environmentally friendly rubber conveyor belts.

[0004] In recent years, with the development of nanotechnology and composite materials, the application of nanofillers and modified fillers in the preparation of rubber conveyor belts has become an effective way to improve the performance of conveyor belts. Nanofillers such as graphene and nanosilica are widely used in the modification of rubber materials due to their unique physical and chemical properties, significantly improving the mechanical properties and wear resistance of rubber. At the same time, the use of waste materials such as bamboo charcoal and steel slag for rubber filling after modification not only achieves resource recycling but also reduces production costs, in line with the concept of sustainable development. However, how to rationally and effectively apply nanofillers and modified fillers in the preparation of rubber conveyor belts to produce high-performance, ultra-wear-resistant rubber conveyor belts has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] Technical problems solved

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a super wear-resistant rubber conveyor belt and a preparation method thereof, which can effectively solve the problems of poor wear resistance and mechanical properties of the conveyor belts in the prior art.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A super wear-resistant rubber conveyor belt, comprising a conveyor belt core and a super wear-resistant rubber covering rubber, wherein the super wear-resistant rubber covering rubber is composed of the following components: a composite rubber material, a wear-resistant modified hybrid filler, modified bamboo charcoal powder, modified steel slag ultrafine powder, nano zinc oxide, stearic acid, an antioxidant, an accelerator, and sulfur;

[0010] The wear-resistant modified hybrid filler is prepared with graphene powder, tannic acid, nano-silica and silane coupling agent KH-550 as main raw materials;

[0011] The modified bamboo charcoal powder is prepared by modifying bamboo charcoal powder with a phthalate coupling agent;

[0012] The modified steel slag ultrafine powder is obtained by modifying the ball-milled steel slag with a silane coupling agent KH-570.

[0013] Furthermore, the preparation method of the composite rubber material is:

[0014] 90-95 parts by weight of solution-polymerized styrene-butadiene rubber and 25-30 parts by weight of cis-1,2-butadiene rubber are poured into a mixing internal mixer, and mixed at a temperature of 70° C. and a rotation speed of 50 r / min for 2-3 minutes to obtain a composite rubber material.

[0015] Furthermore, the preparation method of the wear-resistant modified hybrid filler is:

[0016] S1. Weigh 5-6 parts by weight of graphene powder, 1-2 parts by weight of tannic acid, and 35-40 parts by weight of deionized water, mix them, and disperse and mix them in a water bath at 25° C. after ultrasonic treatment. The resultant solution is recorded as graphene aqueous solution;

[0017] S2. Weigh 7-8 parts by weight of nano-silica and pour it into 50 parts by weight of deionized water. After high-speed dispersion, add 1-2 parts by weight of silane coupling agent KH-550. After high-speed stirring, ultrasonic dispersion is performed. The mixture is reacted in a water bath at 60°C for 1 hour. The result is recorded as modified silica dispersion;

[0018] S3. Pour the graphene aqueous solution and the modified silica dispersion into a high-speed disperser, stir at a stirring speed of 5000 r / min for 10 minutes, place in a water bath at 25°C for reaction for 12 hours, and place in an oven to dry to constant weight to obtain the wear-resistant modified hybrid filler.

[0019] Furthermore, the operation method of ultrasonic treatment in S1 is ultrasonic dispersion at a frequency of 30 kHz for 30 minutes, and the operation method of dispersion mixing in S1 is stirring at a stirring speed of 100 r / min for 2 hours.

[0020] Furthermore, the operation method of high-speed dispersion in S2 is stirring at a stirring speed of 2000 r / min for 10 minutes, the operation method of high-speed stirring in S2 is stirring at a stirring speed of 5000 r / min for 10 minutes, the operation method of ultrasonic dispersion in S2 is ultrasonic dispersion at a frequency of 26 kHz for 2 hours, and the drying temperature for drying to constant weight in S3 is 65-68°C.

[0021] Furthermore, the preparation method of the modified bamboo charcoal powder is:

[0022] Pour the bamboo charcoal powder into a ball mill and ball mill for 30 minutes. After passing through a 200-mesh sieve, weigh 8-10 parts by weight and pour into a high-speed mixer. Then, add 2-3 parts by weight of a phthalate coupling agent into the high-speed mixer and mix at a mixing speed of 1000 r / min for 30 minutes to obtain the modified bamboo charcoal powder.

[0023] Furthermore, the preparation method of the modified steel slag ultrafine powder is:

[0024] Step 1, weigh 1-2 parts by weight of ethylene glycol, 2-3 parts by weight of triethanolamine and 8-10 parts by weight of anhydrous ethanol, mix them, and stir at a stirring speed of 500 r / min for 10 minutes to obtain the grinding aid component;

[0025] Step 2: Mix the grinding aid component and steel slag in a weight ratio of 1:200, pour the mixture into a ball mill, and mill at a speed of 600 r / min for 2 h. The obtained mixture is recorded as steel slag ultrafine powder;

[0026] Step 3. Weigh 12-15 parts by weight of steel slag ultrafine powder and 2-3 parts by weight of silane coupling agent KH-570 and add them to 100 parts by weight of anhydrous ethanol. Stir and react for 2 hours in a water bath at 65°C at a stirring speed of 300 r / min. Then, place it in a blast drying oven at 58°C and dry it to constant weight. The result is the modified steel slag ultrafine powder.

[0027] Furthermore, the preparation method of the super wear-resistant rubber covering is:

[0028] 100 parts by weight of composite rubber material, 4-5 parts by weight of wear-resistant modified hybrid filler, 2-3 parts by weight of modified bamboo charcoal powder, 3-5 parts by weight of modified steel slag ultrafine powder, 2-3 parts by weight of nano zinc oxide, 2-3 parts by weight of stearic acid, 1-2 parts by weight of antioxidant, 1-2 parts by weight of accelerator and 1-2 parts by weight of sulfur are added to an internal mixer in sequence, mixed at a temperature of 70°C for 10 minutes and then sheeted to obtain a super wear-resistant rubber covering rubber.

[0029] A method for preparing a super wear-resistant rubber conveyor belt, the preparation method comprising:

[0030] The surface of the conveyor belt core is coated with phenolic resin adhesive, and then the super wear-resistant rubber cover is flatly laid and adhered to the surface of the conveyor belt core. After vulcanization treatment, the result is a super wear-resistant rubber conveyor belt.

[0031] Furthermore, the vulcanization temperature of the vulcanization treatment is 150-160°C.

[0032] Beneficial effects

[0033] The present invention provides a super wear-resistant rubber conveyor belt and a preparation method thereof. Compared with the existing known technology, the present invention has the following beneficial effects:

[0034] 1. The present invention mixes solution-polymerized styrene-butadiene rubber (SBR) and cis-1,4-butadiene rubber (CIBR) in a certain proportion, and utilizes the high strength and high wear resistance of the SBR and the good elasticity of the CIBR to form complementary advantages, thereby improving the comprehensive performance of the rubber matrix. The present invention utilizes graphene powder, tannic acid, nano-silica and silane coupling agent KH-550 to prepare a wear-resistant modified hybrid filler. Through the reinforcing effect of graphene, the filling effect of nano-silica, and the coupling effect of the silane coupling agent, the wear resistance and hardness of the rubber can be significantly improved. Moreover, the two-dimensional structure of the graphene enables it to form effective physical cross-linking points in the rubber, which can enhance the mechanical properties and wear resistance of the rubber. The nano-silica can reduce the gaps between rubber molecular chains through the filling effect, thereby improving the density and wear resistance of the rubber.

[0035] 2. The modified bamboo charcoal powder and modified steel slag ultrafine powder in the present invention are novel environmentally friendly fillers. They not only have excellent wear resistance, but also can effectively absorb heat during rubber processing, improving the thermal stability of the rubber. The use of phthalate coupling agents and silane coupling agents can enhance the compatibility and bonding between the filler and the rubber matrix, making the filler more evenly dispersed in the rubber, thereby further improving the wear resistance and anti-aging properties of the rubber. The additives in the present invention can promote vulcanization, increase crosslinking density, enhance wear resistance and anti-aging properties in the rubber. Nano zinc oxide as an active agent can promote the vulcanization reaction of the rubber; stearic acid as a lubricant can improve the processing properties of the rubber; the antioxidant can effectively extend the service life of the rubber; the accelerator and sulfur together constitute the rubber vulcanization system, which can ensure the vulcanization effect and performance of the rubber. The present invention can ensure the uniform distribution and full reaction of each component in the rubber through a reasonable preparation process and vulcanization treatment, thereby further improving the wear resistance and comprehensive properties of the rubber. The vulcanization treatment forms a stable crosslinking structure between the rubber molecular chains, thereby improving the strength and wear resistance of the rubber. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0037] The present invention will be further described below with reference to the embodiments.

[0038] The sources of some components in the Examples and Comparative Examples are as follows:

[0039] Solution polymerized styrene butadiene rubber, Hankook Tire Co., Ltd.;

[0040] Butadiene rubber, Hankook Tire Co., Ltd.;

[0041] Graphene, Changzhou Sixth Element Materials Technology Co., Ltd.;

[0042] Tannic acid, Sinopharm Chemical Reagent Company;

[0043] Nano-silicon dioxide, Zhuzhou Xinglong Chemical Industry Co., Ltd.;

[0044] Silane coupling agent KH-550, Nanjing Xiangqian Chemical Co., Ltd.;

[0045] Bamboo charcoal powder, Zhejiang Jianzhong Bamboo Industry Technology Co., Ltd.;

[0046] Phthalate coupling agent, Jingjiang Kanggaote Plastic Technology Co., Ltd.;

[0047] Ethylene glycol, Shanghai Shengjun Industrial Investment Co., Ltd.;

[0048] Triethanolamine, Shanghai Qizuo Chemical Co., Ltd.;

[0049] Anhydrous ethanol, Shanghai Zhenxing Chemical Plant No. 1;

[0050] Steel slag, electric furnace slag produced by Maanshan Iron and Steel (Group) Holding Co., Ltd.;

[0051] Silane coupling agent KH-570, Nanjing Xiangqian Chemical Co., Ltd.;

[0052] Nano zinc oxide, Sino-foreign joint venture Dalian Jinshi Zinc Oxide Co., Ltd.;

[0053] Stearic acid, Linqing Xingtai Rubber Additive Co., Ltd.;

[0054] Antiaging agent, Ningbo Aikemu New Materials Co., Ltd.;

[0055] Accelerator, Huadong Additives Co., Ltd.;

[0056] Sulfur, Linyi Guoao Chemical Co., Ltd.;

[0057] Example 1

[0058] The present embodiment provides a super wear-resistant rubber conveyor belt, which includes a conveyor belt core and a super wear-resistant rubber covering rubber. The super wear-resistant rubber covering rubber is composed of the following components: a composite rubber material, a wear-resistant modified hybrid filler, modified bamboo charcoal powder, modified steel slag ultrafine powder, nano zinc oxide, stearic acid, an antioxidant, an accelerator, and sulfur.

[0059] The preparation method of the composite rubber material is as follows:

[0060] 90 parts by weight of solution-polymerized styrene-butadiene rubber and 25 parts by weight of cis-1,2-butadiene rubber were weighed and poured into a mixing internal mixer, and mixed at a temperature of 70° C. and a rotation speed of 50 r / min for 2 minutes to obtain a composite rubber material.

[0061] The wear-resistant modified hybrid filler is prepared with graphene powder, tannic acid, nano-silica and silane coupling agent KH-550 as main raw materials. The preparation method of the wear-resistant modified hybrid filler is as follows:

[0062] S1. Weigh 5 parts by weight of graphene powder, 1 part by weight of tannic acid, and 35 parts by weight of deionized water, mix them, and ultrasonically disperse them at a frequency of 30 kHz for 30 min. Then, stir them at a stirring speed of 100 r / min in a water bath at a temperature of 25° C. for 2 h. The result is recorded as a graphene aqueous solution;

[0063] S2. Weigh 7 parts by weight of nano-silica and pour it into 50 parts by weight of deionized water. After stirring at a stirring speed of 2000 r / min for 10 minutes, add 1 part by weight of silane coupling agent KH-550. After stirring at a stirring speed of 5000 r / min for 10 minutes, ultrasonically disperse it at a frequency of 26 kHz for 2 hours, and react in a water bath temperature of 60°C for 1 hour. The result is recorded as a modified silica dispersion;

[0064] S3. Pour the graphene aqueous solution and the modified silica dispersion into a high-speed disperser, stir at a stirring speed of 5000 r / min for 10 minutes, place in a water bath at a temperature of 25°C to react for 12 hours, and place in an oven at a drying temperature of 65°C to dry to constant weight to obtain the wear-resistant modified hybrid filler.

[0065] The modified bamboo charcoal powder is prepared by modifying bamboo charcoal powder with a phthalate coupling agent. The preparation method of the modified bamboo charcoal powder is as follows:

[0066] The bamboo charcoal powder was poured into a ball mill and ball milled for 30 minutes. After passing through a 200-mesh sieve, 8 parts by weight were weighed and poured into a high-speed mixer. Then, 2 parts by weight of a phthalate coupling agent was added to the high-speed mixer and mixed at a mixing speed of 1000 r / min for 30 minutes to obtain the modified bamboo charcoal powder.

[0067] The modified steel slag ultrafine powder is obtained by modifying the ball-milled steel slag with a silane coupling agent KH-570. The preparation method of the modified steel slag ultrafine powder is as follows:

[0068] Step 1, weigh 1 part by weight of ethylene glycol, 2 parts by weight of triethanolamine and 8 parts by weight of anhydrous ethanol, mix them, and stir at a stirring speed of 500 r / min for 10 minutes to obtain the grinding aid component;

[0069] Step 2: Mix the grinding aid component and steel slag in a weight ratio of 1:200, pour the mixture into a ball mill, and mill at a speed of 600 r / min for 2 h. The obtained mixture is recorded as steel slag ultrafine powder;

[0070] Step 3. Weigh 12 parts by weight of steel slag ultrafine powder and 2 parts by weight of silane coupling agent KH-570 and add them to 100 parts by weight of anhydrous ethanol. Stir and react for 2 hours in a water bath at 65°C at a stirring speed of 300 r / min. Then, place it in a blast drying oven at 58°C and dry it to constant weight. The result is the modified steel slag ultrafine powder.

[0071] The preparation method of super wear-resistant rubber covering is as follows:

[0072] 100 parts by weight of composite rubber material, 4 parts by weight of wear-resistant modified hybrid filler, 2 parts by weight of modified bamboo charcoal powder, 3 parts by weight of modified steel slag ultrafine powder, 2 parts by weight of nano zinc oxide, 2 parts by weight of stearic acid, 1 part by weight of antioxidant, 1 part by weight of accelerator and 1 part by weight of sulfur are added to an internal mixer in sequence, mixed at a temperature of 70°C for 10 minutes and then sheeted to obtain a super wear-resistant rubber covering rubber.

[0073] A method for preparing a super wear-resistant rubber conveyor belt, the preparation method comprising:

[0074] The surface of the conveyor belt core is coated with phenolic resin adhesive, and then the super wear-resistant rubber cover is flatly laid and adhered to the surface of the conveyor belt core. After vulcanization treatment at a vulcanization temperature of 150°C, the result is a super wear-resistant rubber conveyor belt.

[0075] Example 2

[0076] The present embodiment provides a super wear-resistant rubber conveyor belt, which includes a conveyor belt core and a super wear-resistant rubber covering rubber. The super wear-resistant rubber covering rubber is composed of the following components: a composite rubber material, a wear-resistant modified hybrid filler, modified bamboo charcoal powder, modified steel slag ultrafine powder, nano zinc oxide, stearic acid, an antioxidant, an accelerator, and sulfur.

[0077] The preparation method of the composite rubber material is as follows:

[0078] 95 parts by weight of solution-polymerized styrene-butadiene rubber and 30 parts by weight of cis-1,2-dimethylbutyl rubber were weighed and poured into a mixing internal mixer, and mixed at a temperature of 70° C. and a rotation speed of 50 r / min for 3 minutes to obtain a composite rubber material.

[0079] The wear-resistant modified hybrid filler is prepared with graphene powder, tannic acid, nano-silica and silane coupling agent KH-550 as main raw materials. The preparation method of the wear-resistant modified hybrid filler is as follows:

[0080] S1. Weigh 6 parts by weight of graphene powder, 2 parts by weight of tannic acid, and 40 parts by weight of deionized water, mix them, and ultrasonically disperse them at a frequency of 30 kHz for 30 min. Then, stir them at a stirring speed of 100 r / min in a water bath at a temperature of 25° C. for 2 h. The result is recorded as a graphene aqueous solution;

[0081] S2. Weigh 8 parts by weight of nano-silica and pour it into 50 parts by weight of deionized water. After stirring at a stirring speed of 2000 r / min for 10 minutes, add 2 parts by weight of silane coupling agent KH-550. After stirring at a stirring speed of 5000 r / min for 10 minutes, ultrasonically disperse at a frequency of 26 kHz for 2 hours, and react in a water bath temperature of 60°C for 1 hour. The result is recorded as a modified silica dispersion;

[0082] S3. Pour the graphene aqueous solution and the modified silica dispersion into a high-speed disperser, stir at a stirring speed of 5000 r / min for 10 minutes, place in a water bath at a temperature of 25°C to react for 12 hours, and place in an oven at a drying temperature of 68°C to dry to constant weight to obtain the wear-resistant modified hybrid filler.

[0083] The modified bamboo charcoal powder is prepared by modifying bamboo charcoal powder with a phthalate coupling agent. The preparation method of the modified bamboo charcoal powder is as follows:

[0084] The bamboo charcoal powder was poured into a ball mill and ball-milled for 30 minutes. After passing through a 200-mesh sieve, 10 parts by weight was weighed and poured into a high-speed mixer. Subsequently, 3 parts by weight of a phthalate coupling agent was added to the high-speed mixer and mixed at a mixing speed of 1000 r / min for 30 minutes to obtain the modified bamboo charcoal powder.

[0085] The modified steel slag ultrafine powder is obtained by modifying the ball-milled steel slag with a silane coupling agent KH-570. The preparation method of the modified steel slag ultrafine powder is as follows:

[0086] Step 1, weigh 2 parts by weight of ethylene glycol, 3 parts by weight of triethanolamine and 10 parts by weight of anhydrous ethanol, mix them, and stir at a stirring speed of 500 r / min for 10 minutes to obtain the grinding aid component;

[0087] Step 2: Mix the grinding aid component and steel slag in a weight ratio of 1:200, pour the mixture into a ball mill, and mill at a speed of 600 r / min for 2 h. The obtained mixture is recorded as steel slag ultrafine powder;

[0088] Step 3. Weigh 15 parts by weight of steel slag ultrafine powder and 3 parts by weight of silane coupling agent KH-570 and add them to 100 parts by weight of anhydrous ethanol. Stir and react for 2 hours in a water bath at 65°C at a stirring speed of 300 r / min. Then, place it in a blast drying oven at 58°C and dry it to constant weight. The result is the modified steel slag ultrafine powder.

[0089] The preparation method of super wear-resistant rubber covering is as follows:

[0090] 100 parts by weight of composite rubber material, 5 parts by weight of wear-resistant modified hybrid filler, 3 parts by weight of modified bamboo charcoal powder, 5 parts by weight of modified steel slag ultrafine powder, 3 parts by weight of nano zinc oxide, 3 parts by weight of stearic acid, 2 parts by weight of antioxidant, 2 parts by weight of accelerator and 2 parts by weight of sulfur are added to an internal mixer in sequence, mixed at a temperature of 70°C for 10 minutes and then sheeted to obtain a super wear-resistant rubber covering rubber.

[0091] A method for preparing a super wear-resistant rubber conveyor belt, the preparation method comprising:

[0092] The surface of the conveyor belt core is coated with phenolic resin adhesive, and then the super wear-resistant rubber cover is flatly laid and adhered to the surface of the conveyor belt core. After vulcanization treatment at a vulcanization temperature of 160°C, the result is a super wear-resistant rubber conveyor belt.

[0093] Example 3

[0094] The present embodiment provides a super wear-resistant rubber conveyor belt, which includes a conveyor belt core and a super wear-resistant rubber covering rubber. The super wear-resistant rubber covering rubber is composed of the following components: a composite rubber material, a wear-resistant modified hybrid filler, modified bamboo charcoal powder, modified steel slag ultrafine powder, nano zinc oxide, stearic acid, an antioxidant, an accelerator, and sulfur.

[0095] The preparation method of the composite rubber material is as follows:

[0096] 93 parts by weight of solution-polymerized styrene-butadiene rubber and 28 parts by weight of cis-1,2-butadiene rubber were weighed and poured into a mixing internal mixer, and mixed at a temperature of 70° C. and a rotation speed of 50 r / min for 3 minutes to obtain a composite rubber material.

[0097] The wear-resistant modified hybrid filler is prepared with graphene powder, tannic acid, nano-silica and silane coupling agent KH-550 as main raw materials. The preparation method of the wear-resistant modified hybrid filler is as follows:

[0098] S1, weighing 6 parts by weight of graphene powder, 1 part by weight of tannic acid and 38 parts by weight of deionized water, mixing them, ultrasonically dispersing them at a frequency of 30 kHz for 30 min, and then stirring them at a stirring speed of 100 r / min in a water bath at a temperature of 25° C. for 2 h. The result is recorded as a graphene aqueous solution;

[0099] S2. Weigh 8 parts by weight of nano-silica and pour it into 50 parts by weight of deionized water. After stirring at a stirring speed of 2000 r / min for 10 minutes, add 1 part by weight of silane coupling agent KH-550. After stirring at a stirring speed of 5000 r / min for 10 minutes, ultrasonically disperse at a frequency of 26 kHz for 2 hours, and react in a water bath temperature of 60°C for 1 hour. The result is recorded as a modified silica dispersion;

[0100] S3. Pour the graphene aqueous solution and the modified silica dispersion into a high-speed disperser, stir at a stirring speed of 5000 r / min for 10 minutes, place in a water bath at a temperature of 25°C to react for 12 hours, and place in an oven at a drying temperature of 67°C to dry to constant weight to obtain the wear-resistant modified hybrid filler.

[0101] The modified bamboo charcoal powder is prepared by modifying bamboo charcoal powder with a phthalate coupling agent. The preparation method of the modified bamboo charcoal powder is as follows:

[0102] The bamboo charcoal powder was poured into a ball mill and ball-milled for 30 minutes. After passing through a 200-mesh sieve, 9 parts by weight were weighed and poured into a high-speed mixer. Subsequently, 3 parts by weight of a phthalate coupling agent was added to the high-speed mixer and mixed at a mixing speed of 1000 r / min for 30 minutes to obtain the modified bamboo charcoal powder.

[0103] The modified steel slag ultrafine powder is obtained by modifying the ball-milled steel slag with a silane coupling agent KH-570. The preparation method of the modified steel slag ultrafine powder is as follows:

[0104] Step 1, weigh 2 parts by weight of ethylene glycol, 3 parts by weight of triethanolamine and 9 parts by weight of anhydrous ethanol, mix them, and stir at a stirring speed of 500 r / min for 10 minutes to obtain the grinding aid component;

[0105] Step 2: Mix the grinding aid component and steel slag in a weight ratio of 1:200, pour the mixture into a ball mill, and mill at a speed of 600 r / min for 2 h. The obtained mixture is recorded as steel slag ultrafine powder;

[0106] Step 3. Weigh 13 parts by weight of steel slag ultrafine powder and 2 parts by weight of silane coupling agent KH-570 and add them to 100 parts by weight of anhydrous ethanol. Stir and react for 2 hours in a water bath at 65°C at a stirring speed of 300 r / min. Then, place it in a blast drying oven at 58°C and dry it to constant weight. The result is the modified steel slag ultrafine powder.

[0107] The preparation method of super wear-resistant rubber covering is as follows:

[0108] 100 parts by weight of composite rubber material, 5 parts by weight of wear-resistant modified hybrid filler, 2 parts by weight of modified bamboo charcoal powder, 4 parts by weight of modified steel slag ultrafine powder, 3 parts by weight of nano zinc oxide, 2 parts by weight of stearic acid, 2 parts by weight of antioxidant, 2 parts by weight of accelerator and 2 parts by weight of sulfur are added to an internal mixer in sequence, mixed at a temperature of 70°C for 10 minutes and then sheeted to obtain a super wear-resistant rubber covering rubber.

[0109] A method for preparing a super wear-resistant rubber conveyor belt, the preparation method comprising:

[0110] The surface of the conveyor belt core is coated with phenolic resin adhesive, and then the super wear-resistant rubber cover is flatly laid and adhered to the surface of the conveyor belt core. After vulcanization treatment at a vulcanization temperature of 155°C, the result is a super wear-resistant rubber conveyor belt.

[0111] Comparative Example 1

[0112] The super wear-resistant rubber conveyor belt and its preparation method provided in this comparative example are substantially the same as those in Example 1, with the main difference being that the wear-resistant modified hybrid filler in Example 1 is replaced with nano-silica in this comparative example 1.

[0113] Comparative Example 2

[0114] The super wear-resistant rubber conveyor belt and its preparation method provided in this comparative example are substantially the same as those in Example 1, with the main difference being that the modified bamboo charcoal powder in Example 1 is replaced with unmodified bamboo charcoal powder in this comparative example 2.

[0115] Comparative Example 3

[0116] The super wear-resistant rubber conveyor belt and its preparation method provided in this comparative example are roughly the same as those in Example 1, with the main difference being that the modified steel slag superfine powder in Example 1 is replaced by the steel slag superfine powder in Example 1 in this comparative example 3.

[0117] Performance Testing

[0118] The super wear-resistant rubber conveyor belts prepared in Examples 1-3 and Comparative Examples 1-3 are marked as Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, and Comparative Example 3, respectively. The performance of Examples 1-3 and Comparative Examples 1-3 was then tested. The specific testing methods and test items are as follows:

[0119] 1. The tensile strength and elongation at break of Examples 1-3 and Comparative Examples 1-3 were tested with reference to GB / T528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber". The obtained data are recorded in the following table.

[0120] 2. The Shore A hardness of Examples 1-3 and Comparative Examples 1-3 was tested in accordance with GB / T531.1-2008 "Test method for indentation hardness of vulcanized or thermoplastic rubber - Part 1: Shore durometer method (Shore hardness)". The obtained data are recorded in the following table.

[0121] 3. The wear volume of Examples 1-3 and Comparative Examples 1-3 was tested with reference to the standard of GB / T1689-2014, and the obtained data were recorded in the following table;

[0122]

[0123] It can be seen from the data in the above table that the mechanical properties and wear resistance of the super wear-resistant rubber conveyor belts in Examples 1-3 are significantly better than those in Comparative Examples 1-3, indicating that adding wear-resistant modified hybrid fillers, modified bamboo charcoal powder and modified steel slag ultrafine powder in the process of preparing super wear-resistant rubber conveyor belts can improve the performance of super wear-resistant rubber conveyor belts.

[0124] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0125] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A super wear-resistant rubber conveyor belt, comprising a conveyor belt core and a super wear-resistant rubber covering rubber, characterized in that: The super wear-resistant rubber covering rubber is composed of the following components: composite rubber material, wear-resistant modified hybrid filler, modified bamboo charcoal powder, modified steel slag ultrafine powder, nano zinc oxide, stearic acid, antioxidant, accelerator and sulfur; The wear-resistant modified hybrid filler is prepared with graphene powder, tannic acid, nano-silica and silane coupling agent KH-550 as main raw materials; The modified bamboo charcoal powder is prepared by modifying bamboo charcoal powder with a phthalate coupling agent; The modified steel slag ultrafine powder is obtained by modifying the ball-milled steel slag with a silane coupling agent KH-570.

2. The super wear-resistant rubber conveyor belt according to claim 1, characterized in that: The preparation method of the composite rubber material is: 90-95 parts by weight of solution-polymerized styrene-butadiene rubber and 25-30 parts by weight of cis-1,2-butadiene rubber are poured into a mixing internal mixer, and mixed at a temperature of 70° C. and a rotation speed of 50 r / min for 2-3 minutes to obtain a composite rubber material.

3. The super wear-resistant rubber conveyor belt according to claim 1, characterized in that: The preparation method of the wear-resistant modified hybrid filler is: S1. Weigh 5-6 parts by weight of graphene powder, 1-2 parts by weight of tannic acid, and 35-40 parts by weight of deionized water, mix them, and disperse and mix them in a water bath at 25° C. after ultrasonic treatment. The resultant solution is recorded as graphene aqueous solution; S2. Weigh 7-8 parts by weight of nano-silica and pour it into 50 parts by weight of deionized water. After high-speed dispersion, add 1-2 parts by weight of silane coupling agent KH-550. After high-speed stirring, ultrasonic dispersion is performed. The mixture is reacted in a water bath at 60°C for 1 hour. The result is recorded as modified silica dispersion; S3. Pour the graphene aqueous solution and the modified silica dispersion into a high-speed disperser, stir at a stirring speed of 5000 r / min for 10 minutes, place in a water bath at 25°C for reaction for 12 hours, and place in an oven to dry to constant weight to obtain the wear-resistant modified hybrid filler.

4. The super wear-resistant rubber conveyor belt according to claim 3, characterized in that: The operation method of ultrasonic treatment in S1 is ultrasonic dispersion at a frequency of 30 kHz for 30 min, and the operation method of dispersion mixing in S1 is stirring at a stirring speed of 100 r / min for 2 h.

5. The super wear-resistant rubber conveyor belt according to claim 3, characterized in that: The operation method of high-speed dispersion in S2 is stirring at a stirring speed of 2000 r / min for 10 minutes, the operation method of high-speed stirring in S2 is stirring at a stirring speed of 5000 r / min for 10 minutes, the operation method of ultrasonic dispersion in S2 is ultrasonic dispersion at a frequency of 26 kHz for 2 hours, and the drying temperature for drying to constant weight in S3 is 65-68°C.

6. The super wear-resistant rubber conveyor belt according to claim 1, characterized in that: The preparation method of the modified bamboo charcoal powder is: Pour the bamboo charcoal powder into a ball mill and ball mill for 30 minutes. After passing through a 200-mesh sieve, weigh 8-10 parts by weight and pour into a high-speed mixer. Then, add 2-3 parts by weight of a phthalate coupling agent into the high-speed mixer and mix at a mixing speed of 1000 r / min for 30 minutes to obtain the modified bamboo charcoal powder.

7. The super wear-resistant rubber conveyor belt according to claim 1, characterized in that: The preparation method of the modified steel slag ultrafine powder is: Step 1, weigh 1-2 parts by weight of ethylene glycol, 2-3 parts by weight of triethanolamine and 8-10 parts by weight of anhydrous ethanol, mix them, and stir at a stirring speed of 500 r / min for 10 minutes to obtain the grinding aid component; Step 2: Mix the grinding aid component and steel slag in a weight ratio of 1:200, pour the mixture into a ball mill, and mill at a speed of 600 r / min for 2 h. The obtained mixture is recorded as steel slag ultrafine powder; Step 3. Weigh 12-15 parts by weight of steel slag ultrafine powder and 2-3 parts by weight of silane coupling agent KH-570 and add them to 100 parts by weight of anhydrous ethanol. Stir and react for 2 hours in a water bath at 65°C at a stirring speed of 300 r / min. Then, place it in a blast drying oven at 58°C and dry it to constant weight. The result is the modified steel slag ultrafine powder.

8. The super wear-resistant rubber conveyor belt according to claim 1, characterized in that: The preparation method of the super wear-resistant rubber covering rubber is as follows: 100 parts by weight of composite rubber material, 4-5 parts by weight of wear-resistant modified hybrid filler, 2-3 parts by weight of modified bamboo charcoal powder, 3-5 parts by weight of modified steel slag ultrafine powder, 2-3 parts by weight of nano zinc oxide, 2-3 parts by weight of stearic acid, 1-2 parts by weight of antioxidant, 1-2 parts by weight of accelerator and 1-2 parts by weight of sulfur are added to an internal mixer in sequence, mixed at a temperature of 70°C for 10 minutes and then sheeted to obtain a super wear-resistant rubber covering rubber.

9. The method for preparing a super wear-resistant rubber conveyor belt according to any one of claims 1 to 8, characterized in that: The preparation method is: The surface of the conveyor belt core is coated with phenolic resin adhesive, and then the super wear-resistant rubber cover is flatly laid and adhered to the surface of the conveyor belt core. After vulcanization treatment, the result is a super wear-resistant rubber conveyor belt.

10. The method for preparing a super wear-resistant rubber conveyor belt according to claim 9, characterized in that: The vulcanization temperature of the vulcanization treatment is 150-160°C.

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