Anti-abrasion mud pump rubber lining material and preparation process thereof

Abstract

The invention belongs to the technical field of rubber materials, and particularly relates to an anti-abrasion slurry pump rubber lining material and a preparation process thereof. On the basis of the prior art, anti-aging rubber and reinforcing wear-resistant filler are added into natural rubber for modification and vulcanization to prepare the anti-abrasion slurry pump rubber lining material, the rubber is epoxidized through hydrogen peroxide and acetic acid, then furan groups are grafted for modification, and N, N-dimethyl formamide is grafted for modification. The anti-aging rubber prepared by crosslinking N, N '-m-phenylenedimaleimide has excellent wear resistance and erosion resistance, the impact resistance and tensile strength of the lining material are improved by introducing epoxy groups, and the anti-aging rubber can be self-crosslinked at normal temperature and can repair cracks between the rubber; the silicon dioxide intercalated graphite structure improves the mechanical property of the filler, the boron nitride is embedded in the surface of the intercalated graphite to form a three-dimensional filler network structure, the gap filling of the rubber is tighter, and the rubber has excellent reinforcing performance; the abrasion-resistant mud pump rubber lining material prepared by the invention has excellent abrasion resistance and erosion resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of rubber materials, and particularly relates to an abrasion-resistant slurry pump rubber lining material and a preparation process thereof. Background Art

[0002] As a core equipment in fields such as energy exploitation and environmental protection engineering, the flow-through components of slurry pumps are long-term faced with the dual threats of high-speed scouring by solid-particle-containing media and chemical corrosion. Although traditional metal material slurry pumps have relatively high strength, they have defects such as insufficient wear resistance, poor cavitation resistance, easy corrosion failure, and high energy consumption. Although rubber-lined slurry pumps buffer wear through elastomers, there are technical bottlenecks such as poor high-temperature resistance, insufficient high-pressure sealing performance, and low tear strength. With the increasing demand for extreme working conditions such as high temperature, high pressure, and high sand content in the industry, the existing material system has been difficult to meet the requirements of long life and high reliability.

[0003] The Chinese invention patent with the publication number CN112375320B discloses a preparation method of an abrasion-resistant and corrosion-resistant valve rubber sheet material for slurry pumps. This invention uses polyether chloride and acrylate rubber for blending modification. The abrasion-resistant and corrosion-resistant valve rubber sheet material for slurry pumps prepared by this invention has excellent properties such as resistance to acids and alkalis, mud water, and cement slurry, and has characteristics such as wear resistance, erosion resistance, anti-aging, long life, good tensile and tear performance, and high-temperature resistance. However, the existing technology has the technical problem that the composition of the rubber lining filler is not further optimized to improve the wear resistance and crack resistance of the lining material. Summary of the Invention

[0004] The purpose of the present invention is to provide an abrasion-resistant slurry pump rubber lining material and a preparation process thereof, which are used to solve the technical problem of further optimizing the composition of the rubber lining filler in the existing technology to improve the wear resistance and crack resistance of the lining material.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme: An abrasion-resistant slurry pump rubber lining material is prepared from the following components in parts by mass: 90 - 100 parts of natural rubber, 10 - 20 parts of anti-aging rubber, 4 - 5 parts of activator, 0.5 - 3 parts of vulcanizing agent, 0.5 - 1.5 parts of accelerator, 0.5 - 3 parts of antioxidant, 0.2 - 1.5 parts of scorch retarder, and 10 - 15 parts of reinforcing and wear-resistant filler.

[0006] The grade of the natural rubber is any one of SCR 5 and SCR 10; the activator is prepared by mixing zinc oxide and stearic acid in a mass ratio of 2 to 3:1, the vulcanizing agent is any one of sulfur and dicumyl peroxide, the accelerator is any one of CZ, NOBS, and MBT, the antioxidant is any one or a combination of 4020, 264, and 2246, and the scorch retarder is any one of 4010NA, CTP, and MTP.

[0007] The preparation method of the anti-aging rubber includes the following steps: S11. By mass, pulverize the rubber through a pulverizer, add 5 to 10 parts of natural rubber and 0.3 to 0.5 parts of surfactant to 50 to 60 parts of deionized water, heat up to 30 to 40 °C and stir for 0.5 to 1 h, add 3 to 5 parts of acetic acid and 8 to 15 parts of 30% hydrogen peroxide, react for 5 to 6 h, add ethanol for flocculation, filter and collect the solid, wash with deionized water and then add it to a 1 to 3 wt% sodium carbonate solution to react for 20 to 24 h until no bubbles are generated, filter and dry to obtain epoxidized rubber; S12. By mass, dissolve 5 to 10 parts of epoxidized rubber in 50 to 100 parts of tetrahydrofuran, add 5 to 8 parts of crosslinking modifier, 2 to 4 parts of triethylenetetramine and 0.2 to 0.5 parts of dicumyl peroxide initiator in a nitrogen atmosphere, heat up to 50 to 60 °C and react for 3 to 4 h to obtain a crude grafted rubber, remove impurities from the crude grafted rubber, and vacuum dry to obtain modified rubber; S13. By mass, add 5 to 10 parts of modified rubber to 1 to 3 parts of N, N'-m-phenylene bismaleimide crosslinking agent and 0.2 to 0.5 parts of dicumyl peroxide initiator, mix evenly, and crosslink to obtain anti-aging rubber.

[0008] Preferably, the surfactant in S11 is any one of octylphenol polyoxyethylene ether, dodecanol polyoxyethylene ether, and lauroyl diethanolamine.

[0009] Preferably, the impurity removal step in S12 is to add 5 to 10 parts of crude anti-aging rubber to a toluene solution, heat up to 100 to 120 °C until the crude anti-aging rubber is completely dissolved, add methanol and deionized water for washing, and filter and collect the solid.

[0010] Preferably, the mass ratio of the modified rubber to the N, N'-m-phenylene bismaleimide crosslinking agent in S13 is 10:2 to 3.

[0011] Preferably, in S13, heat up to 160 to 180 °C and crosslink for 0.5 to 1 h.

[0012] The preparation method of the crosslinking modifier includes the following steps: S21. By mass parts, dissolve 20 - 30 parts of 2 - chloroethyl methacrylate in 40 - 50 parts of toluene, add 100 - 150 parts of 30 - 40wt% sodium hydroxide solution, stir evenly, then add 200 - 270 parts of furfuryl alcohol and 10 - 20 parts of tetrabutylammonium bromide, and react to obtain a mixed solution. S22. Extract the mixed solution with deionized water and dichloromethane, take the upper - layer liquid, add anhydrous sodium sulfate to remove water, and rotary evaporate to obtain a cross - linked modifier.

[0013] Preferably, the reaction mechanism of the cross - linked modifier is as follows:

[0014] After mass spectrometry detection and analysis, the results are as follows: m / z: 210.09 (100.0%), 211.09 (12.0%).

[0015] Preferably, in S21, react at 0 - 4°C for 36 - 48 h, and add 100 - 200 parts of deionized water to terminate the reaction.

[0016] The preparation method of the reinforcing and wear - resistant filler includes the following steps: S31. By mass parts, add 1 - 2 parts of nano - boron nitride to 40 - 50 parts of deionized water, ultrasonically disperse, and simultaneously dropwise add 15 - 20wt% hydrochloric acid and 450 - 500 g / L sodium thiosulfate aqueous solution, finish dropping in 1 - 2 h, react at room temperature for 4 - 6 h, wash with deionized water until neutral, and ultrasonically disperse in 50 - 60 parts of deionized water to obtain an aqueous phase. S32. By mass parts, ball - mill 10 - 20 parts of graphite and 4 - 5 parts of nano - silicon dioxide spheres for 5 - 6 h to obtain intercalated graphite. Add 10 - 20 parts of intercalated graphite to 40 - 50 parts of isooctyl acrylate, ultrasonically disperse for 0.5 - 1 h, add 0.5 - 1 part of Tween - 80, 5 - 10 parts of 1,3 - butanediol dimethacrylate cross - linker and 0.3 - 0.5 part of azobisisobutyronitrile initiator, heat up to 70 - 80°C in a nitrogen atmosphere, and pre - polymerize for 1 - 5 min to obtain an oil phase. S33. Mix the aqueous phase and the oil phase, stir at a speed of 3000 - 5000 r / min to obtain an emulsion, heat up to 70 - 80°C in a nitrogen atmosphere, react for 4 - 6 h, after the reaction, filter to collect the solid, wash and dry to obtain the reinforcing and wear - resistant filler.

[0017] Preferably, in S31, ultrasonically disperse at a power of 300 - 500 W for 0.5 - 1 h, dropwise add hydrochloric acid at a rate of 4 - 6 mL / min, and simultaneously dropwise add sodium thiosulfate aqueous solution at a rate of 2 - 3 mL / min.

[0018] Preparation process of rubber lining material for anti-abrasion and erosion mud pump, comprising the following steps: S1. Mixing in an internal mixer: Add natural rubber, anti-aging rubber, reinforcing and wear-resistant filler, and activator into an internal mixer, raise the temperature and stir to obtain a mixed material; S2. Kneading: Cool the mixed material to 40-50°C and then add it into a kneading machine, add scorch retarder, anti-aging agent, accelerator and vulcanizing agent, and knead to obtain a rubber compound; S3. Vulcanization: Let the rubber compound stand at room temperature for 10-12 h, put the rubber compound into a mold, add it into a vulcanizing machine for high-temperature vulcanization, and cool to room temperature to obtain the rubber lining material for anti-abrasion and erosion mud pump.

[0019] Preferably, in S1, the temperature in the internal mixer is raised to 100-110°C, and the mixture is mixed at a speed of 60-80 r / min for 5-10 min.

[0020] Preferably, in S2, the kneading is carried out at a speed of 60-80 r / min for 5-10 min, and the vulcanizing agent is added to the mixed material in 2-3 times, with an interval of 1-2 min each time.

[0021] Preferably, in S3, the temperature for vulcanization is raised to 140-170°C for vulcanization for 0.5-2 h.

[0022] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows: 1. On the basis of the existing technology, the present invention modifies natural rubber by adding anti-aging rubber and reinforcing and wear-resistant filler, and obtains the rubber lining material for anti-abrasion and erosion mud pump through vulcanization reaction. The anti-aging rubber obtained by epoxidizing rubber with hydrogen peroxide and acetic acid and then grafting furan groups and crosslinking with N, N'-m-phenylene bismaleimide has excellent wear resistance and erosion resistance. The introduction of epoxy groups improves the impact resistance and tensile strength of the lining material. The crosslinking of furan groups and N, N'-m-phenylene bismaleimide can self-crosslink at room temperature and can repair the cracks between rubbers. The silica intercalated graphite structure improves the mechanical properties of the filler, and boron nitride is embedded on the surface of the intercalated graphite to form a three-dimensional filler network structure, making the gaps in the rubber filled more tightly and having excellent reinforcing properties. The rubber lining material for anti-abrasion and erosion mud pump prepared by the present invention has excellent wear resistance and erosion resistance.

[0023] 2. The present invention prepares an aqueous phase by sulfur deposition modification of boron nitride and then redispersing it in water. After silica is intercalated into graphite, it is pre-polymerized in isooctyl acrylate to prepare an oil phase. The aqueous phase and the oil phase are mixed and emulsified, and then reacted and polymerized to prepare a reinforcing and wear-resistant filler. Sulfur is loaded on the surface of nano boron nitride, and the melting of sulfur during high-temperature vulcanization disperses boron nitride uniformly, improving the compatibility and crosslinking ability between rubber and the filler. The structure of silica intercalated graphite improves the mechanical properties of the filler, and silica provides reaction sites, making the organic polymerization coating more compact. Boron nitride is embedded on the surface of the intercalated graphite, forming a three-dimensional filler network structure, making the gap filling of rubber more compact and having excellent reinforcing properties. The components of the reinforcing and wear-resistant filler interact with each other, improving the wear resistance and crack resistance of rubber.

[0024] 3. The present invention epoxidizes rubber with hydrogen peroxide and acetic acid, then grafts and modifies it with furan groups, and crosslinks it with N,N'-m-phenylene bismaleimide to obtain anti-aging rubber. The epoxy groups arrange into the crystal lattice, improving the crystallization ability of rubber. The epoxy groups can form covalent bonds through reactions, improving the impact resistance and tensile strength. The crosslinking of furan groups and N,N'-m-phenylene bismaleimide can self-crosslink at room temperature and repair the cracks between rubbers. The anti-aging rubber prepared by the present invention has excellent wear resistance and erosion resistance.

[0025] 4. The crosslinking modifier prepared by dissolving 2-chloroethyl methacrylate in toluene, adding furfuryl alcohol, sodium hydroxide solution and tetrabutylammonium bromide has furan groups. The rigid structure of the furan ring grafted onto the epoxidized rubber restricts the slippage of molecular chains, reduces the wear phenomenon caused by the deformation of the lining material, and improves the corrosion resistance and wear resistance of the lining material. Specific embodiments

[0026] The technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Example 1. The anti-abrasion slurry pump rubber lining material of this example is prepared from the following components by mass: 90 g of natural rubber, 10 g of anti-aging rubber, 4.5 g of activator, 2 g of vulcanizing agent, 1 g of accelerator, 2 g of anti-aging agent, 1 g of anti-scorching agent, and 10 g of reinforcing and wear-resistant filler.

[0028] The grade of the natural rubber is SCR 5; the activator is prepared by mixing zinc oxide and stearic acid in a mass ratio of 3:1, the vulcanizing agent is sulfur, the accelerator is CZ, the anti-aging agent is 4020, and the anti-scorching agent is 4010NA.

[0029] The preparation method of the anti-aging rubber in this embodiment includes the following steps: S11. Pulverize the rubber through a pulverizer. Add 10 g of natural rubber and 0.3 g of octylphenol polyoxyethylene ether to 50 g of deionized water, heat up to 40 °C and stir for 0.5 h, add 3 g of acetic acid and 8 g of 30% hydrogen peroxide solution, react for 6 h, add ethanol for flocculation, filter and collect the solid, wash with deionized water and then add it to a 1 wt% sodium carbonate solution to react for 24 h until no bubbles are generated, filter and dry to obtain epoxidized rubber; S12. Dissolve 10 g of epoxidized rubber in 100 g of tetrahydrofuran, add 8 g of crosslinking modifier, 2 g of triethylenetetramine and 0.5 g of diisopropylbenzene peroxide initiator in a nitrogen atmosphere, heat up to 50 - 60 °C and react for 3 - 4 h to obtain a crude grafted rubber. Add 5 - 10 g of the crude anti-aging rubber to a toluene solution, heat up to 100 - 120 °C until the crude anti-aging rubber is completely dissolved, add methanol and deionized water for washing, filter and collect the solid, and dry in vacuum to obtain modified rubber; S13. Add 10 g of modified rubber, 2 g of N,N'-m-phenylene bismaleimide crosslinking agent and 0.5 g of diisopropylbenzene peroxide initiator and mix evenly, heat up to 160 °C and crosslink for 0.5 h to obtain anti-aging rubber.

[0030] The preparation method of the crosslinking modifier in this embodiment includes the following steps: S21. Dissolve 23 g of 2-chloroethyl methacrylate in 50 g of toluene, add 100 g of 30 - 40 wt% sodium hydroxide solution, stir evenly and then add 245 g of furfuryl alcohol and 14 g of tetrabutylammonium bromide, react at 0 °C for 48 h, add 200 g of deionized water to terminate the reaction to obtain a mixed solution; S22. Extract the mixed solution with deionized water and dichloromethane, take the upper layer liquid, add anhydrous sodium sulfate for water removal, and rotary evaporate to obtain the crosslinking modifier.

[0031] The preparation method of the reinforcing and wear-resistant filler in this embodiment includes the following steps: S31. Add 2 g of nano boron nitride to 50 g of deionized water, ultrasonically disperse it at a power of 500 W for 0.5 h, dropwise add 15 wt% hydrochloric acid at a rate of 4 mL / min, and at the same time dropwise add an aqueous solution of sodium thiosulfate with a concentration of 471 g / L at a rate of 2 mL / min, finish dropping in 1 h, react at room temperature for 6 h, wash with deionized water until neutral, and ultrasonically disperse it in 60 g of deionized water to obtain an aqueous phase; S32. Grind 15 g of graphite and 4 g of nano-silica spheres for 6 h to obtain intercalated graphite. Add 15 g of the intercalated graphite to 45 g of isooctyl acrylate, disperse it ultrasonically for 0.5 h, add 1 g of Tween-80, 10 g of 1,3-butanediol dimethacrylate crosslinking agent and 0.5 g of azobisisobutyronitrile initiator, and heat it to 80 °C in a nitrogen atmosphere and pre-polymerize for 5 min to obtain the oil phase; S33. Mix the aqueous phase and the oil phase, stir at a speed of 5000 r / min to obtain an emulsion, heat it to 80 °C in a nitrogen atmosphere, react for 6 h, filter and collect the solid after the reaction, wash and dry it to obtain the reinforcing and wear-resistant filler.

[0032] The preparation process of the anti-abrasion and corrosion-resistant rubber lining material for the mud pump in this example includes the following steps: S1. Kneading: Add natural rubber, anti-aging rubber, reinforcing and wear-resistant filler and activator into a kneader, heat it to 110 °C, mix at a speed of 60 r / min for 5 min to obtain a mixed material; S2. Open mill: Cool the mixed material to 50 °C and then add it into an open mill, add anti-scorching agent, anti-aging agent, accelerator and vulcanizing agent, mix at a speed of 80 r / min for 10 min, and add the vulcanizing agent to the mixed material in 3 times, with an interval of 2 min each time, to obtain a mixed rubber; S3. Vulcanization: Let the mixed rubber stand at room temperature for 12 h, put the mixed rubber into a mold, add it into a vulcanizer, heat it to 140 °C and vulcanize for 1 h, and cool it to room temperature to obtain the anti-abrasion and corrosion-resistant rubber lining material for the mud pump.

[0033] Example 2. The anti-abrasion and corrosion-resistant rubber lining material for the mud pump in this example is prepared from the following components by mass: 100 g of natural rubber, 10 g of anti-aging rubber, 4 g of activator, 0.5 g of vulcanizing agent, 0.5 g of accelerator, 3 g of anti-aging agent, 0.5 g of anti-scorching agent and 11 g of reinforcing and wear-resistant filler.

[0034] The grade of the natural rubber is SCR 10; the activator is prepared by mixing zinc oxide and stearic acid according to a mass ratio of 2:1, the vulcanizing agent is sulfur, the accelerator is MBT, the anti-aging agent is 2246, and the anti-scorching agent is CTP.

[0035] The preparation process of the anti-abrasion and corrosion-resistant rubber lining material for the mud pump in this example includes the following steps: S1. Kneading: Add natural rubber, anti-aging rubber, reinforcing and wear-resistant filler and activator into a kneader, heat it to 100 °C, mix at a speed of 80 r / min for 7 min to obtain a mixed material; S2. Kneading: Cool the mixed materials to 40 °C and then add them into a kneader. Add scorch retardant, anti-aging agent, accelerator and vulcanizing agent, and mix at a speed of 60 r / min for 5 min. The vulcanizing agent is added to the mixed materials in two portions with an interval of 1 min between each addition to obtain a kneaded rubber compound. S3. Vulcanization: Let the kneaded rubber compound stand at room temperature for 10 h. Put the kneaded rubber compound into a mold, place it in a vulcanizer, heat it to 140 °C and vulcanize for 2 h, then cool it to room temperature to obtain the abrasion-resistant slurry pump rubber lining material.

[0036] The difference between the anti-aging rubber of this example and that of Example 1 is that the raw materials of the epoxidized rubber are replaced with 10 g of natural rubber, 3 g of acetic acid and 15 g of 30% hydrogen peroxide.

[0037] The preparation method of the reinforcing and wear-resistant filler in this example is the same as that in Example 1.

[0038] Example 3. The abrasion-resistant slurry pump rubber lining material of this example is prepared from the following components by mass: 90 g of natural rubber, 15 g of anti-aging rubber, 5 g of activator, 1.5 g of vulcanizing agent, 0.9 g of accelerator, 1.5 g of anti-aging agent, 1.1 g of scorch retardant and 12 g of reinforcing and wear-resistant filler.

[0039] The grade of the natural rubber is SCR 5; the activator is prepared by mixing zinc oxide and stearic acid in a mass ratio of 3:1; the vulcanizing agent is dicumyl peroxide; the accelerator is NOBS; the anti-aging agent is prepared by mixing 4020 and 2246 in a mass ratio of 1:1; the scorch retardant is 4010NA.

[0040] The preparation process of the abrasion-resistant slurry pump rubber lining material of this example includes the following steps: S1. Internal mixing: Add natural rubber, anti-aging rubber, reinforcing and wear-resistant filler and activator into an internal mixer, heat it to 100 °C, and mix at a speed of 65 r / min for 10 min to obtain a mixed material. S2. Kneading: Cool the mixed material to 50 °C and then add it into a kneader. Add scorch retardant, anti-aging agent, accelerator and vulcanizing agent, and mix at a speed of 80 r / min for 10 min. The vulcanizing agent is added to the mixed material in three portions with an interval of 2 min between each addition to obtain a kneaded rubber compound. S3. Vulcanization: Let the kneaded rubber compound stand at room temperature for 10 h. Put the kneaded rubber compound into a mold, place it in a vulcanizer, heat it to 160 °C and vulcanize for 0.5 h, then cool it to room temperature to obtain the abrasion-resistant slurry pump rubber lining material.

[0041] The difference between the anti-aging rubber of this example and that of Example 1 is that the dosage of the crosslinking modifier is replaced with 5 parts.

[0042] The preparation method of the reinforcing and wear-resistant filler in this embodiment is the same as that in Embodiment 1.

[0043] Embodiment 4. The anti-abrasion slurry pump rubber lining material in this embodiment is prepared from the following components by mass: 100 g of natural rubber, 15 g of anti-aging rubber, 4.5 g of activator, 0.5 g of vulcanizing agent, 1.5 g of accelerator, 0.5 g of anti-aging agent, 0.5 g of anti-scorching agent, and 15 g of reinforcing and wear-resistant filler.

[0044] The grade of the natural rubber is SCR 10; the activator is prepared by mixing zinc oxide and stearic acid in a mass ratio of 2:1, the vulcanizing agent is sulfur, the accelerator is CZ, the anti-aging agent is 2246, and the anti-scorching agent is 4010NA.

[0045] The preparation process of the anti-abrasion slurry pump rubber lining material in this embodiment includes the following steps: S1. Kneading: Add natural rubber, anti-aging rubber, reinforcing and wear-resistant filler, and activator into a kneader, heat up to 110°C, and mix at a speed of 70 r / min for 10 min to obtain a mixed material; S2. Open milling: Cool the mixed material to 50°C and then add it into an open mill. Add anti-scorching agent, anti-aging agent, accelerator, and vulcanizing agent, and mix at a speed of 70 r / min for 10 min. The vulcanizing agent is added to the mixed material in 3 portions at intervals of 2 min to obtain a mixed rubber; S3. Vulcanization: Let the mixed rubber stand at room temperature for 12 h. Put the mixed rubber into a mold, add it to a vulcanizer, heat up to 150°C and vulcanize for 2 h, and then cool to room temperature to obtain the anti-abrasion slurry pump rubber lining material.

[0046] The preparation method of the anti-aging rubber in this embodiment is the same as that in Embodiment 1.

[0047] The difference between the reinforcing and wear-resistant filler in this embodiment and that in Embodiment 1 is that 20 wt% hydrochloric acid is dropped at a rate of 6 mL / min, and at the same time, an aqueous solution of sodium thiosulfate with a concentration of 496 g / L is dropped at a rate of 3 mL / min.

[0048] Embodiment 5. The anti-abrasion slurry pump rubber lining material in this embodiment is prepared from the following components by mass: 90 g of natural rubber, 20 g of anti-aging rubber, 4 g of activator, 2.5 g of vulcanizing agent, 1.5 g of accelerator, 0.5 g of anti-aging agent, 1.5 g of anti-scorching agent, and 13 g of reinforcing and wear-resistant filler.

[0049] The grade of the natural rubber is SCR 5; the activator is prepared by mixing zinc oxide and stearic acid in a mass ratio of 3:1, the vulcanizing agent is dicumyl peroxide, the accelerator is CZ, the anti-aging agent is prepared by mixing 4020 and 264 in a mass ratio of 1:1, and the scorch retarder is 4010NA.

[0050] The preparation process of the anti-abrasion slurry pump rubber lining material of this embodiment includes the following steps: S1. Internal mixing: Add natural rubber, anti-aging rubber, reinforcing and wear-resistant filler and activator into an internal mixer, heat up to 105 °C, and mix at a speed of 60 r / min for 5 min to obtain a mixed material; S2. Open mixing: Cool the mixed material to 45 °C and then add it into an open mill, add scorch retarder, anti-aging agent, accelerator and vulcanizing agent, and mix at a speed of 60 r / min for 10 min. The vulcanizing agent is added to the mixed material in 2 times, with an interval of 2 min each time, to obtain a mixed rubber; S3. Vulcanization: Let the mixed rubber stand at room temperature for 10 h, put the mixed rubber into a mold, add it into a vulcanizer, heat up to 170 °C and vulcanize for 0.5 h, and cool to room temperature to obtain the anti-abrasion slurry pump rubber lining material.

[0051] The preparation method of the anti-aging rubber in this embodiment is the same as that in Example 1.

[0052] The difference between the reinforcing and wear-resistant filler in this embodiment and that in Example 1 is that after the emulsion is prepared in S33, it is heated up to 70 °C and reacted for 4 h.

[0053] Comparative Example 1. The difference between the anti-abrasion slurry pump rubber lining material in this comparative example and that in Example 1 is that the natural rubber directly reacts with the crosslinking modifier to prepare the anti-aging rubber.

[0054] Comparative Example 2. The difference between the anti-abrasion slurry pump rubber lining material in this comparative example and that in Example 1 is that the anti-aging rubber is replaced with epoxidized rubber.

[0055] Comparative Example 3. The difference between the anti-abrasion slurry pump rubber lining material in this comparative example and that in Example 1 is that the reinforcing and wear-resistant filler is replaced with carbon black.

[0056] Performance test Test the tensile strength and elongation at break of the anti-abrasion slurry pump rubber lining materials prepared in each example and comparative example according to GB / T 528-2009 "Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties".

[0057] Using deionized water as the medium, controlling the gas flow rate at 25 m / s, subject the anti-abrasion slurry pump rubber lining materials prepared in each example and comparative example to cavitation for 70 h, and observe the surfaces of the anti-abrasion slurry pump rubber lining materials prepared in each example and comparative example.

[0058] Using the solid-containing mud with a solid content of 20 wt% as the medium, controlling the fluid flow rate at 20 m / s, abrading the rubber lining materials of the anti-abrasion mud pumps prepared in each example and comparative example for 15 h, and measuring the volume loss of the rubber lining materials of the anti-abrasion mud pumps prepared in each example and comparative example.

[0059] The test results are shown in Table 1 below: Table 1 Test Results

[0060] From the data in the above table, it can be seen that the tensile strength of the rubber lining materials of the anti-abrasion mud pumps prepared in Examples 1 to 5 is between 35.5 and 36.4 MPa, and the elongation at break is between 289.6 and 297.4%, indicating that the rubber lining materials of the anti-abrasion mud pumps prepared by the present invention have excellent mechanical properties; the surfaces of the rubber lining materials of the anti-abrasion mud pumps prepared in Examples 1 to 5 after 70 h of cavitation are flat and smooth, and the volume loss after 15 h of abrasion is 0.02 - 0.04 cm 3 Between, the reinforcing and wear-resistant filler in Comparative Example 3 was replaced with carbon black, resulting in a decrease in the compatibility between the filler and the rubber, and a decrease in the wear resistance of the lining material. Therefore, there are a small number of pits and cracks on the surface of Comparative Example 3 after 70 h of cavitation, and the volume loss after 15 h of abrasion is 0.15 cm 3 , indicating that the rubber lining materials of the anti-abrasion mud pumps prepared by the present invention have excellent wear resistance and anti-cavitation performance.

[0061] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

[0062] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art can better understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Anti-abrasion slurry pump rubber lining material, characterized in that: It is prepared from the following components in parts by weight: 90~100 parts of natural rubber, 10~20 parts of anti-aging rubber, 4~5 parts of activator, 0.5~3 parts of vulcanizer, 0.5~1.5 parts of accelerator, 0.5~3 parts of antioxidant, 0.2~1.5 parts of scorch retarder and 10~15 parts of reinforcing wear-resistant filler.

2. The anti-abrasion slurry pump rubber lining material according to claim 1, characterized in that: The grade of the natural rubber is any one of SCR 5 and SCR 10; the activator is prepared by mixing zinc oxide and stearic acid in a mass ratio of 2 to 3:1; the vulcanizing agent is any one of sulfur and diisopropylbenzene peroxide; the accelerator is any one of CZ, NOBS, and MBT; the antioxidant is any one or more combinations of 4020, 264, and 2246; and the anti-scorch agent is any one of 4010NA, CTP, and MTP.

3. The anti-abrasion slurry pump rubber lining material according to claim 1, characterized in that: The method for preparing the anti-aging rubber comprises the following steps: S11. Powder the rubber by a pulverizer according to mass parts, add 5-10 parts of natural rubber and 0.3-0.5 parts of surfactant into 50-60 parts of deionized water, heat to 30-40°C and stir for 0.5-1h, add 3-5 parts of acetic acid and 8-15 parts of 30% hydrogen peroxide, react for 5-6h, add ethanol for flocculation, collect the solid by filtration, wash with deionized water, add into 1-3wt% sodium carbonate solution and react for 20-24h until no bubbles are generated, filter and dry to obtain epoxidized rubber; S12, dissolving 5-10 parts of epoxidized rubber in 50-100 parts of tetrahydrofuran by mass, adding 5-8 parts of a crosslinking modifier, 2-4 parts of triethylenetetramine and 0.2-0.5 parts of diisopropylbenzene peroxide initiator in a nitrogen atmosphere, heating to 50-60° C. and reacting for 3-4 hours to obtain a crude grafted rubber product, removing impurities from the crude grafted rubber product, and vacuum drying to obtain a modified rubber; S13. Add 1 to 3 parts of N, N'-m-phenylene bismaleimide crosslinking agent and 0.2 to 0.5 parts of diisopropylbenzene peroxide initiator to 5 to 10 parts of modified rubber by mass, mix evenly, and crosslink to obtain anti-aging rubber.

4. The anti-abrasion slurry pump rubber lining material according to claim 3, characterized in that: The surfactant in S11 is any one of octylphenol polyoxyethylene ether, dodecanol polyoxyethylene ether, and lauryl diethanolamine; the impurity removal step in S12 is to add 5 to 10 parts of the anti-aging rubber crude product into a toluene solution, heat it to 100 to 120° C. until the anti-aging rubber crude product is completely dissolved, add methanol and deionized water for washing, and filter and collect the solid; in S13, heat it to 160 to 180° C. for crosslinking for 0.5 to 1 hour, and the mass ratio of the modified rubber to the N, N'-m-phenylene bismaleimide crosslinking agent is 10:2 to 3.

5. The anti-abrasion slurry pump rubber lining material according to claim 4, characterized in that: The preparation method of the cross-linking modifier comprises the following steps: S21, dissolving 20-30 parts of 2-chloroethyl methacrylate in 40-50 parts of toluene by mass, adding 100-150 parts of 30-40wt% sodium hydroxide solution, stirring evenly, then adding 200-270 parts of furfuryl alcohol and 10-20 parts of tetrabutylammonium bromide, and reacting to obtain a mixed solution; S22. Extract the mixed solution with deionized water and dichloromethane, take the upper layer of liquid and add anhydrous sodium sulfate to remove water, and rotary evaporate to obtain a cross-linking modifier.

6. The anti-abrasion slurry pump rubber lining material according to claim 5, characterized in that: In the S21, the reaction is carried out at 0-4° C. for 36-48 hours, and 100-200 parts of deionized water are added to terminate the reaction.

7. The anti-abrasion slurry pump rubber lining material according to claim 1, characterized in that: The preparation method of the reinforced wear-resistant filler comprises the following steps: S31, by mass, add 1-2 parts of nano boron nitride to 40-50 parts of deionized water, ultrasonically disperse, and simultaneously drop 15-20wt% hydrochloric acid and 450-500g / L sodium thiosulfate aqueous solution, and add dropwise, and the dripping is completed within 1-2h, and the mixture is reacted at room temperature for 4-6h, and washed with deionized water until neutral, and ultrasonically dispersed in 50-60 parts of deionized water to prepare an aqueous phase; S32. Ball-mill 10-20 parts of graphite and 4-5 parts of nano-silicon dioxide for 5-6 hours by mass to obtain intercalated graphite, add 10-20 parts of intercalated graphite to 40-50 parts of isooctyl acrylate, ultrasonically disperse for 0.5-1 hour, add 0.5-1 part of Tween-80, 5-10 parts of 1,3-butanediol dimethacrylate cross-linking agent and 0.3-0.5 parts of azobisisobutyronitrile initiator, raise the temperature to 70-80° C. in a nitrogen atmosphere, prepolymerize for 1-5 minutes, and obtain an oil phase; S33, the water phase and the oil phase are mixed, and stirred at a speed of 3000-5000 r / min to obtain an emulsion, and the temperature is raised to 70-80°C in a nitrogen atmosphere, and the reaction is performed for 4-6 hours. After the reaction is completed, the solid is collected by filtration, washed and dried to obtain a reinforcing wear-resistant filler.

8. The anti-abrasion slurry pump rubber lining material according to claim 7, characterized in that: In the S31, ultrasonic dispersion is performed at a power of 300-500 W for 0.5-1 h, hydrochloric acid is added dropwise at a rate of 4-6 mL / min, and sodium thiosulfate aqueous solution is added dropwise at a rate of 2-3 mL / min.

9. A process for preparing an anti-abrasion slurry pump rubber lining material, characterized in that: The steps include: S1. Internal mixing: adding natural rubber, anti-aging rubber, reinforcing wear-resistant filler and active agent into an internal mixer, heating and stirring to obtain a mixed material; S2, mixing: cool the mixed material to 40-50℃ and then add it to the mixing mill, add scorch retarder, antioxidant, accelerator and vulcanizing agent, mix to obtain the mixed rubber; S3. Vulcanization: The rubber mix is ​​allowed to stand at room temperature for 10 to 12 hours, the rubber mix is ​​placed in a mold, added to a vulcanizer for high temperature vulcanization, and cooled to room temperature to obtain an anti-abrasion mud pump rubber lining material.

10. The process for preparing the anti-abrasion slurry pump rubber lining material according to claim 9, characterized in that: The internal mixing in S1 is heated to 100-110° C. and mixed at a speed of 60-80 r / min for 5-10 min. The open mixing in S2 is mixed at a speed of 60-80 r / min for 5-10 min, and the vulcanizing agent is added to the mixed material in 2-3 times, each time with an interval of 1-2 min. The vulcanization in S3 is heated to 140-170° C. and vulcanized for 0.5-2 h.

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