Carbon black with low heat generation and high wear resistance as well as preparation method and application thereof

Abstract

The invention relates to the technical field of carbon black preparation, and provides low-heat high-wear-resistance carbon black as well as a preparation method and application thereof, and the preparation method comprises the following steps: establishing an MLH low-heat high-wear-resistance carbon black model, preparing the carbon black, obtaining DBP, CTAB, CDBP and T of the prepared carbon black, calculating the MLH low-heat high-wear-resistance carbon black model, measuring the performance of the prepared carbon black, and adjusting the preparation method of the carbon black. And when the calculated MLH is 49-51, selecting a preparation method of the low-heat-generation high-wear-resistance carbon black. According to the scheme, the restriction relation between low heat generation and high wear resistance of the carbon black is effectively balanced, the ethylene oil serves as the raw material oil, the potassium carbonate serves as the additive, the natural gas serves as the fuel, the prepared low-heat-generation high-wear-resistance carbon black is small in heat generation amount, low in wear and high in strength, and the reinforcing performance of the carbon black in a new energy automobile tire is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon black preparation, and particularly relates to a low heat build-up and high wear-resistant carbon black, a preparation method thereof, and an application thereof. Background Art

[0002] As an important industrial basic raw material, carbon black is widely used in fields such as rubber, ink, and coatings. In recent years, with the rapid development of new energy vehicles, the tire industry requires that the tread carbon black has good filling and reinforcing properties, low heat build-up, good wear resistance, and environmental friendliness. The low heat build-up and high wear-resistant carbon black is regarded as one of the key materials for the development of low hysteresis and high wear-resistant tires.

[0003] At present, the domestic products and related technologies of low heat build-up and high wear-resistant carbon black are still in an immature stage. Compared with foreign products, the product performance is poor. According to relevant research, there is a bottleneck of mutual restriction in the low heat build-up performance and high wear-resistant performance in the carbon black structure design. In terms of technical research, the control of the aggregate particle size distribution is the key path to balance the low heat build-up and high wear-resistant performance. A wide aggregate distribution can bring a low hysteresis effect. The key to low hysteresis carbon black lies in the control of the surface area and high structure degree; in terms of products, there is a large difference between the lack of domestic products and international products. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a low heat build-up and high wear-resistant carbon black, a preparation method thereof, and an application thereof, aiming to solve the problems mentioned in the background art.

[0005] In a first aspect, the present invention provides a preparation method of a low heat build-up and high wear-resistant carbon black, including the following steps:

[0006] Step S1: Establish an MLH low heat build-up and high wear-resistant carbon black model. The formula of the MLH low heat build-up and high wear-resistant carbon black model is expressed as:

[0007]

[0008] In the formula: MLH is the low heat build-up and high wear-resistant carbon black model; DBP is the dibutyl phthalate absorption value of carbon black; CTAB is the cetyltrimethylammonium bromide adsorption specific surface area of carbon black; CDBP is the primary structure of carbon black; T is the coloring strength of carbon black;

[0009] Step S2: Carry out the preparation of carbon black, obtain the DBP, CTAB, CDBP, and T of the prepared carbon black, calculate the MLH low heat build-up and high wear-resistant carbon black model, and measure the performance of the prepared carbon black.

[0010] Step S3: Adjust the preparation method of carbon black, repeat Step S2. When the calculated MLH = 49 - 51, select it as the preparation method of the low heat build-up and high wear-resistant carbon black.

[0011] Further, in step S3, the preparation method of the low heat - generating and high - wear - resistant carbon black includes the following steps:

[0012] Step S301: After filtering and removing impurities from the compressed air, first heat it to 100°C, and then pre - heat it to 600 - 650°C;

[0013] Step S302: Feed the pre - heated compressed air into the reaction furnace at a flow rate of 9 km 3 / h, and feed natural gas and aqueous potassium carbonate solution into the reaction furnace at a flow rate of 2.0 kg / h, and carry out a combustion reaction at 1900 - 1950°C;

[0014] Step S303: Pre - heat the ethylene oil to 250°C, and then add it to the reaction furnace at a flow rate of 2700 kg / h for pyrolysis reaction. React for 25 μs to generate carbon black flue gas;

[0015] Step S304: Quench the carbon black flue gas twice. The first quench cools the carbon black flue gas to 720 - 750°C, and the second quench cools the carbon black flue gas to 240 - 250°C;

[0016] Step S305: The cooled carbon black flue gas enters the main bag filter for collection. The collected carbon black is crushed by a micron pulverizer and then sent to a cyclone separator; Wet granulation is adopted, and after granulation, carbon black particles are obtained. Finally, dry at 240 - 250°C to obtain carbon black.

[0017] Further, in step S302, the mass fraction of potassium carbonate in the aqueous potassium carbonate solution is 1.5%.

[0018] Further, in step S303, pre - heat the 80°C ethylene oil for 4 min to 250°C.

[0019] Further, in step S304, the pressure of the quench water for the first quench is 1.2 MPa, and the pressure of the quench water for the second quench is 0.5 MPa.

[0020] Further, in step S305, the particle size of the carbon black particles is 0.6 - 1.0 mm.

[0021] Further, in step S305, the water pressure for wet granulation is 0.25 MPa.

[0022] In the second aspect, the present invention also provides a detection method for low heat - generating and high - wear - resistant carbon black, which is characterized by including the following steps:

[0023] Step S11: Establish an MLH low heat - generating and high - wear - resistant carbon black model. The formula of the MLH low heat - generating and high - wear - resistant carbon black model is expressed as:

[0024]

[0025] In the formula: MLH is the low heat - generating and high wear - resistant carbon black model; DBP is the dibutyl phthalate absorption value of carbon black; CTAB is the specific surface area of carbon black adsorption; CDBP is the primary structure of carbon black; T is the coloring strength of carbon black;

[0026] Step S12: Obtain the key carbon black indexes DBP, CTAB, CDBP and T of the carbon black to be tested, and conduct the calculation of the MLH low heat - generating and high wear - resistant carbon black model. When the calculation result is: 49 ≤ MLH ≤ 51, the carbon black to be tested is low heat - generating and high wear - resistant carbon black.

[0027] Thirdly, the present invention also provides a low heat - generating and high wear - resistant carbon black prepared by a preparation method of a low heat - generating and high wear - resistant carbon black.

[0028] Fourthly, the present invention also provides an application of a preparation method of a low heat - generating and high wear - resistant carbon black in the field of new energy vehicle tires. The low heat - generating and high wear - resistant carbon black has both low heat - generating property and high wear - resistance, and is suitable for the tread of new energy vehicle tires.

[0029] The present invention has the following technical effects:

[0030] (1) Based on the MLH low heat - generating and high wear - resistant carbon black model, the low heat - generating and high wear - resistant carbon black is prepared, effectively balancing the restrictive relationship between the low heat - generating property and high wear - resistance of carbon black. And using ethylene oil as the raw material oil, potassium carbonate as the additive, and natural gas as the fuel, the prepared low heat - generating and high wear - resistant carbon black has less heat generation, low abrasion, and high strength, improving the reinforcing performance of carbon black in new energy vehicle tires.

[0031] (2) After obtaining the key carbon black indexes DBP, CTAB, CDBP and T of the carbon black to be tested, conduct the calculation of the MLH low heat - generating and high wear - resistant carbon black model to quickly judge whether the carbon black to be tested is low heat - generating and high wear - resistant carbon black. Description of the Drawings

[0032] By referring to the following drawings, the exemplary embodiments of the present invention can be more completely understood:

[0033] Figure 1 It is the dynamic thermomechanical property test results of vulcanized rubber samples made of the carbon black and rubber compound raw materials (green formula) of Example 1 and Comparative Example 1 provided by the present invention.

[0034] Figure 2 It is the DIN abrasion test results of vulcanized rubber samples made of the carbon black and rubber compound raw materials (green formula) of Example 1 and Comparative Example 1 provided by the present invention. Detailed Embodiments

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0037] An embodiment of the present invention provides a preparation method of low heat generation and high wear-resistant carbon black, comprising the following steps:

[0038] Step S1: Establish an MLH low heat generation and high wear-resistant carbon black model, and the formula of the MLH low heat generation and high wear-resistant carbon black model is expressed as:

[0039]

[0040] In the formula: MLH is the low heat generation and high wear-resistant carbon black model; DBP is the dibutyl phthalate absorption value of carbon black; CTAB is the adsorption specific surface area of carbon black; CDBP is the primary structure of carbon black; T is the coloring strength of carbon black;

[0041] Step S2: Prepare carbon black, obtain the DBP, CTAB, CDBP and T of the prepared carbon black, calculate the MLH low heat generation and high wear-resistant carbon black model, and measure the performance of the prepared carbon black;

[0042] Step S3: Adjust the preparation method of carbon black, repeat Step S2, and when the calculated MLH = 49 - 51, select it as the preparation method of low heat generation and high wear-resistant carbon black.

[0043] It is understandable that there is a bottleneck of mutual restriction between the low heat build-up and high abrasion resistance of carbon black. In order to balance the relationship between the two, the dispersibility of carbon black in rubber composites, the carbon black structure and morphology-rubber / carbon black interface interaction-material dynamic performance relationship and law, and process parameters-carbon black structure and morphology-material dynamic performance are analyzed; then the key carbon black indexes DPA, SF, DBP and CTAB, and the relationship of carbon black performance are analyzed. It can be seen that when the DBP of carbon black increases, the DPA of the carbon black aggregate expansion increases, while when the CTAB of carbon black increases, the DPA of the carbon black aggregate expansion decreases; and when the shape factor calculated by the perimeter and projected area of the carbon black aggregate is lower than the value calculated by the 50% frequency value (median diameter) measured by the centrifugal sedimentation method, that is, SF < -D50 + a, a = 400 - 450, low heat build-up of carbon black can be achieved; and when the equivalent circle diameter calculated by the projected area of the carbon black aggregate is lower than the value calculated by the product of DBP and CTAB, that is, DPA < 0.2(DBP - CTAB) + b, b = 110 - 130, high abrasion resistance of carbon black can be achieved; where DPA is the number average value of the equivalent circle diameter calculated by the projected area of the carbon black aggregate; SF is the number average value of the shape factor of the two-dimensional projected image of the carbon black aggregate taken by the transmission electron microscope, SF = (perimeter) 2 / (projected area) × (1 / 4π) × 100; DBP is the dibutyl phthalate absorption value of carbon black; CTAB is the adsorbed specific surface area; -D50 is the 50% frequency value (median diameter) measured by the centrifugal sedimentation method.

[0044] Based on this, DPA is replaced by the key index (DBP - CTAB) in the actual production of carbon black as a parameter to evaluate the abrasion resistance of carbon black; SF is used as the width of the carbon black aggregate used in actual production, which can be characterized by T (carbon black color strength). The greater the carbon black color strength T, the smaller the carbon black aggregate size; CDBP (primary structure) is a parameter to measure the quality of the combination of carbon black and rubber mixture; the key carbon black indexes DBP (dibutyl phthalate absorption value of carbon black), CTAB (adsorbed specific surface area), CDBP (primary structure) and T (color strength) are integrated to establish the MLH low heat build-up and high abrasion resistance carbon black model, and the formula of the MLH low heat build-up and high abrasion resistance carbon black model is proposed as:

[0045] According to the actual production experience, the DBP limit value is set to 140, the CDBP limit value is set to 110, the CTAB limit value is set to 90, and the T limit value is set to 110. It is concluded that MLH = 50 is the best state. Then, according to the corresponding parameters of the actual preparation process, it can be known that when 49 ≤ MLH ≤ 51, the restrictive relationship between the low heat build-up performance and high abrasion resistance performance of carbon black can be effectively balanced, and a low heat build-up and high abrasion resistance carbon black can be prepared.

[0046] Specifically, in step S3, the preparation method of the low heat build-up and high abrasion resistance carbon black includes the following steps:

[0047] Step S301: After filtering and removing impurities from the compressed air, first heat it to 100°C, and then preheat it to 600 - 650°C;

[0048] Step S302: Feed the preheated compressed air into the reaction furnace at a flow rate of 9 km 3 / h, and feed natural gas and an aqueous potassium carbonate solution into the reaction furnace at a flow rate of 2.0 kg / h, and carry out a combustion reaction at 1900 - 1950°C;

[0049] Step S303: Preheat the ethylene oil to 250°C, and then add it to the reaction furnace at a flow rate of 2700 kg / h for cracking reaction. React for 25 μs to produce carbon black flue gas;

[0050] Step S304: Quench the carbon black flue gas twice. The first quench cools the carbon black flue gas to 720 - 750°C, and the second quench cools the carbon black flue gas to 240 - 250°C;

[0051] Step S305: The cooled carbon black flue gas enters the main bag filter for collection. The collected carbon black is pulverized by a micron pulverizer and then sent to a cyclone separator; Wet granulation is adopted, and after granulation, carbon black particles are obtained. Finally, dry at 240 - 250°C to obtain carbon black.

[0052] Specifically, in step S302, the mass fraction of potassium carbonate in the aqueous potassium carbonate solution is 1.5%.

[0053] Specifically, in step S303, preheat the ethylene oil at 80°C for 4 min to 250°C.

[0054] Specifically, in step S304, the pressure of the quench water for the first quench is 1.2 MPa, and the pressure of the quench water for the second quench is 0.5 MPa.

[0055] Specifically, in step S305, the particle size of the carbon black particles is 0.6 - 1.0 mm.

[0056] Specifically, in step S305, the water pressure for wet granulation is 0.25 MPa.

[0057] In some embodiments, the present invention also provides a detection method for low heat - generating and high - wear - resistant carbon black, which is characterized by including the following steps:

[0058] Step S11: Establish an MLH low heat - generating and high - wear - resistant carbon black model. The formula of the MLH low heat - generating and high - wear - resistant carbon black model is expressed as:

[0059]

[0060] Wherein: MLH is the low heat - generating and high wear - resistant carbon black model; DBP is the dibutyl phthalate absorption value of carbon black; CTAB is the specific surface area of carbon black adsorption; CDBP is the primary structure of carbon black; T is the coloring strength of carbon black;

[0061] Step S12: Obtain the key carbon black indexes DBP, CTAB, CDBP and T of the carbon black to be measured, and perform the calculation of the MLH low heat - generating and high wear - resistant carbon black model. When the calculation result is: 49 ≤ MLH ≤ 51, the carbon black to be measured is the low heat - generating and high wear - resistant carbon black.

[0062] In some embodiments, the present invention also provides a low heat - generating and high wear - resistant carbon black prepared by a preparation method of a low heat - generating and high wear - resistant carbon black.

[0063] In some embodiments, the present invention also provides an application of a preparation method of a low heat - generating and high wear - resistant carbon black in the field of new energy vehicle tires. The low heat - generating and high wear - resistant carbon black has both low heat - generating property and high wear - resistance, and is suitable for the tread of new energy vehicle tires.

[0064] It can be understood that preparing the low heat - generating and high wear - resistant carbon black based on the MLH low heat - generating and high wear - resistant carbon black model can effectively balance the restrictive relationship between the low heat - generating property and high wear - resistance of carbon black. And using ethylene oil as the raw material oil, potassium carbonate as the additive, and natural gas as the fuel, the prepared low heat - generating and high wear - resistant carbon black has less heat generation, low abrasion, and high strength, improving the reinforcing performance of carbon black in new energy vehicle tires.

[0065] After obtaining the key carbon black indexes DBP, CTAB, CDBP and T of the carbon black to be measured, perform the calculation of the MLH low heat - generating and high wear - resistant carbon black model to quickly judge whether the carbon black to be measured is the low heat - generating and high wear - resistant carbon black.

[0066] Example 1:

[0067] (1) Filter and remove impurities from the compressed air, first heat it to 100 °C, and then pre - heat it to 650 °C;

[0068] (2) Feed the pre - heated compressed air into the reaction furnace at a flow rate of 9 km 3 / h, and feed natural gas and an aqueous potassium carbonate solution with a mass fraction of potassium carbonate of 1.5% into the reaction furnace at a flow rate of 2.0 kg / h, and carry out a combustion reaction at 1900 °C;

[0069] (3) Pre - heat 80 °C ethylene oil for 4 min to 250 °C, and then add it to the reaction furnace at a flow rate of 2700 kg / h for pyrolysis reaction. React for 25 μs to generate carbon black flue gas;

[0070] (4) Quench the carbon black flue gas twice. For the first quench, the pressure of the quench water is 1.2 MPa, and the temperature of the carbon black flue gas is reduced to 750 °C. For the second quench, the pressure of the quench water is 0.5 MPa, and the temperature of the carbon black flue gas is reduced to 250 °C;

[0071] (5) The cooled carbon black flue gas enters the main bag filter for collection. The collected carbon black is pulverized by a micron pulverizer and then sent to a cyclone separator; wet granulation is used, the pressure of the granulation water is 0.25 MPa, and carbon black particles with a particle size of 0.6 mm are obtained after granulation; finally, it is dried at 250 °C to obtain carbon black.

[0072] It is measured that DBP = 140, CTAB = 93, CDBP = 111, T = 106, then MLH = 49.22 is calculated, which satisfies 49 ≤ MLH ≤ 51, that is, low heat - generating and high - wear - resistant carbon black is prepared.

[0073] Example 2:

[0074] (1) Filter and remove impurities from the compressed air, first heat it to 100 °C, and then pre - heat it to 600 °C;

[0075] (2) Feed the pre - heated compressed air into the reaction furnace at a flow rate of 9 km³ / h, and feed natural gas and an aqueous potassium carbonate solution with a mass fraction of potassium carbonate of 1.5% into the reaction furnace at a flow rate of 2.0 kg / h, and carry out a combustion reaction at 1950 °C;

[0076] (3) Pre - heat 80 °C ethylene oil for 4 min to 250 °C, and then add it to the reaction furnace at a flow rate of 2700 kg / h for pyrolysis reaction. The reaction lasts for 25 μs to produce carbon black flue gas;

[0077] (4) Quench the carbon black flue gas twice. For the first quench, the pressure of the quench water is 1.2 MPa, and the temperature of the carbon black flue gas is reduced to 720 °C. For the second quench, the pressure of the quench water is 0.5 MPa, and the temperature of the carbon black flue gas is reduced to 240 °C;

[0078] (5) The cooled carbon black flue gas enters the main bag filter for collection. The collected carbon black is pulverized by a micron pulverizer and then sent to a cyclone separator; wet granulation is used, the pressure of the granulation water is 0.25 MPa, and carbon black particles with a particle size of 1.0 mm are obtained after granulation; finally, it is dried at 240 °C to obtain carbon black.

[0079] Comparative Example 1:

[0080] (1) Filter and remove impurities from the compressed air, first heat it to 100 °C, and then pre - heat it to 650 °C;

[0081] (2) Feed the pre - heated compressed air at 10 km 3The flow rate of / h is introduced into the reaction furnace, and the natural gas and the aqueous potassium carbonate solution with a mass fraction of potassium carbonate of 1.75% are fed into the reaction furnace at a flow rate of 2.5 kg / h, and a combustion reaction is carried out at 1900 °C;

[0082] (3) Preheat the 80 °C ethylene oil for 4 min to 250 °C, and then add it to the reaction furnace at a flow rate of 2500 kg / h for pyrolysis reaction for 20 μs to produce carbon black flue gas;

[0083] (4) Quench the carbon black flue gas twice. For the first quench, the pressure of the quench water is 1.0 MPa, and the temperature of the carbon black flue gas is reduced to 760 °C. For the second quench, the pressure of the quench water is 1.0 MPa, and the temperature of the carbon black flue gas is reduced to 260 °C;

[0084] (5) The cooled carbon black flue gas enters the main bag filter for collection. The collected carbon black is pulverized by a micron pulverizer and then sent to a cyclone separator; wet granulation is adopted, the pressure of the granulation water is 0.25 MPa, and carbon black particles with a particle size of 0.6 mm are obtained after granulation; finally, it is dried at 250 °C to obtain carbon black.

[0085] It is measured that DBP = 135, CTAB = 117, CDBP = 110, T = 115, then MLH = 17.22 is calculated, which does not satisfy 49 ≤ MLH ≤ 51, that is, carbon black with ordinary performance is prepared.

[0086] Performance detection:

[0087] (1) The carbon blacks prepared in Example 1 and Comparative Example 1 are respectively placed on a two-roll rubber mixer with the rubber compound raw materials (green formula) or the rubber compound raw materials (national standard formula), and a mixed rubber is prepared by the mixing method of the open mill - test method A in GB / T3780.18 - 2017. Then, the mixed rubber is hot-pressed and formed in a flat vulcanizer according to the standard of GB / T6038 - 2006 (the hot-pressing conditions are 151 °C × 40 min) to prepare vulcanized rubber samples; among them, the rubber compound raw materials (green formula) are calculated by mass: natural rubber 300, cis-butadiene rubber 100, carbon black 200, stearic acid 8, zinc oxide 14, antioxidant 6, protective wax 4, plasticizer 12, vulcanization accelerator 3.2, sulfur 6, anti-scorching agent 1.2.

[0088] Compared with the rubber compound raw materials (national standard formula), the rubber compound raw materials (green formula) add other base materials and more additives, such as cis-butadiene rubber, antioxidant, protective wax, plasticizer, etc. The purpose is to reduce the viscosity of the vulcanized rubber, improve the processing performance, plasticity, fluidity, etc. of the rubber, help the mixing and dispersion of carbon black in the rubber compound, and enable carbon black to exert its best filling and reinforcing performance in the rubber compound.

[0089] (2) The carbon blacks prepared in Example 1 and Comparative Example 1 were respectively made into vulcanized rubber samples with rubber compound raw materials (green formula) or rubber compound raw materials (national standard formula) for testing and characterization.

[0090] ① Tensile property tests were carried out according to the national standard GB / T 528-2009 (tensile speed was 500 mm / min). The test results of the dynamic mechanical properties of the vulcanized rubber samples made from the carbon blacks of Example 1 and Comparative Example 1 with rubber compound raw materials (green formula) are shown in Table 1;

[0091] Table 1 Dynamic mechanical properties

[0092]

[0093] ② Mixing rubber tests were carried out according to the national standard GB / T 1232.1-2016. The test results of the abrasion resistance of the vulcanized rubber samples made from the carbon blacks of Example 1 and Comparative Example 1 with rubber compound raw materials (green formula) are shown in Table 2;

[0094] Table 2 Abrasion resistance

[0095]

[0096]

[0097] ③ Take the vulcanized rubber sample strips with a specification length of 8 mm, cool them to -60 °C with nitrogen, and use a heating rate of 3 k / min to perform a heating scan up to 80.0 °C. The test results of the dynamic thermomechanical properties of the vulcanized rubber samples made from the carbon blacks of Example 1 and Comparative Example 1 with rubber compound raw materials (green formula) were determined according to the standard ASTM D7028-2007, as Figure 1 shown; The DIN abrasion test results of the vulcanized rubber samples made from the carbon blacks of Example 1 and Comparative Example 1 with rubber compound raw materials (green formula) were determined according to the national standard GB / T9867-2008, as Figure 2 shown.

[0098] ④ The test results of the abrasion resistance and heat generation performance at 60 °C of DMA of the vulcanized rubber samples made from the carbon blacks prepared in Example 1 and Comparative Example 1 with rubber compound raw materials (green formula) or rubber compound raw materials (national standard formula) (vulcanization conditions were 151 °C and 40 minutes) are shown in Table 3.

[0099] Table 3 Abrasion resistance and heat generation performance

[0100]

[0101] It can be seen that the carbon black prepared in Example 1 is a low heat - build - up and high - wear - resistance carbon black. Compared with Comparative Example 1, the abrasion resistance of the carbon black prepared in Example 1 is increased by 26.8%, and the heat - build - up performance is improved by 11.1%. It can be seen that the MLH low heat - build - up and high - wear - resistance carbon black model can effectively improve the porosity of the carbon black product, increase the specific surface area of the carbon black, and balance the low heat - build - up performance and high wear - resistance performance of the carbon black.

[0102] The abrasion resistance of the vulcanizate samples prepared from the carbon black prepared in Example 1 and Comparative Example 1 and the rubber compound raw materials (green formula) or rubber compound raw materials (national standard formula) is shown in Table 3. It can be seen that in the rubber compound raw materials (green formula) or rubber compound raw materials (national standard formula), the mechanical properties of the vulcanizate samples prepared from Example 1 and Comparative Example 1 are similar. The value of the 300% modulus of the vulcanizate sample prepared from Example 1 is slightly higher, indicating that its ability to resist deformation is greater and the reinforcement performance is better. In the rubber compound raw materials (national standard formula), Example 1 has a relatively high level in both DIN abrasion and Akron abrasion, and the comprehensive wear - resistance performance is the best. In the rubber compound raw materials (green formula), Example 1 has the lowest level in DIN abrasion and the highest level in Akron abrasion. It can be seen that compared with Comparative Example 1, the abrasion - resistance of the carbon black prepared in Example 1 is the best. In the rubber compound raw materials (green formula) or rubber compound raw materials (national standard formula), for Example 1 in DMA at 60 °C dynamic thermomechanics, the energy loss during its reciprocating deformation is smaller and the heat build - up is less. It can be seen that the heat - build - up performance of Example 1 is the best.

[0103] In summary, the low heat - build - up and high - wear - resistance carbon black prepared by the present invention has less heat generation, low abrasion, and high strength, and can improve the reinforcement performance of carbon black in new - energy vehicle tires.

[0104] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for preparing low heat generation and high wear resistance carbon black, characterized in that: The following steps are involved: Step S1: Establishing a MLH low heat generation and high wear resistance carbon black model. The formula of the MLH low heat generation and high wear resistance carbon black model is expressed as: In the formula: MLH is the low heat generation and high wear resistance carbon black model; DBP is the carbon black oil absorption value; CTAB is the carbon black adsorption specific surface area; CDBP is the carbon black primary structure; T is the carbon black coloring strength; Step S2: preparing carbon black, obtaining DBP, CTAB, CDBP and T of the prepared carbon black, calculating the MLH low heat generation and high wear resistance carbon black model, and measuring the performance of the prepared carbon black; Step S3: Adjust the preparation method of carbon black, repeat step S2, and when the calculated MLH=49-51, select the preparation method of low heat generation and high wear resistance carbon black.

2. The method for preparing a low heat generation and high wear resistance carbon black according to claim 1, characterized in that: In step S3, the method for preparing low heat generation and high wear resistance carbon black comprises the following steps: Step S301: After filtering and removing impurities from the compressed air, first heat it to 100°C, and then preheat it to 600-650°C; Step S302: preheat the compressed air at 9 km 3 / h flow rate into the reactor, natural gas and potassium carbonate aqueous solution are sent into the reactor at a flow rate of 2.0kg / h, and combustion reaction is carried out at 1900-1950℃; Step S303: preheating ethylene oil to 250°C, and then adding it into the reactor at a flow rate of 2700kg / h for cracking reaction, reacting for 25μs to generate carbon black flue gas; Step S304: quenching the carbon black flue gas twice, wherein the first quenching cools the carbon black flue gas to 720-750° C., and the second quenching cools the carbon black flue gas to 240-250° C.; Step S305: The cooled carbon black flue gas enters the main bag filter for collection. The collected carbon black is crushed by a micron grinder and then sent to a cyclone separator. Wet granulation is adopted to obtain carbon black particles, which are finally dried at 240-250°C to obtain carbon black.

3. The method for preparing a low heat generation and high wear resistance carbon black according to claim 2, characterized in that: In step S302, the mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 1.5%.

4. The method for preparing a low heat generation and high wear resistance carbon black according to claim 3, characterized in that: In step S303, 80°C ethylene oil is preheated to 250°C for 4 minutes.

5. The method for preparing a low heat generation and high wear resistance carbon black according to claim 4, characterized in that: In step S304, the quenching water pressure of the first quenching is 1.2 MPa, and the quenching water pressure of the second quenching is 0.5 MPa.

6. The method for preparing a low heat generation and high wear resistance carbon black according to claim 5, characterized in that: In step S305, the particle size of the carbon black particles is 0.6-1.0 mm.

7. The method for preparing low heat generation and high wear resistance carbon black according to claim 6, characterized in that: In step S305, the water pressure of wet granulation is 0.25 MPa.

8. A method for detecting low heat generation and high wear resistance carbon black, characterized in that: The following steps are involved: Step S11: Establishing a MLH low heat generation and high wear resistance carbon black model. The formula of the MLH low heat generation and high wear resistance carbon black model is expressed as: In the formula: MLH is the low heat generation and high wear resistance carbon black model; DBP is the carbon black oil absorption value; CTAB is the carbon black adsorption specific surface area; CDBP is the carbon black primary structure; T is the carbon black coloring strength; Step S12: Obtain key carbon black indicators DBP, CTAB, CDBP and T of the carbon black to be tested, and calculate the MLH low heat generation and high wear resistance carbon black model. When the calculation result is: 49≤MLH≤51, the carbon black to be tested is low heat generation and high wear resistance carbon black.

9. A low heat generation and high wear resistance carbon black, characterized in that: The method for preparing low heat generation and high wear resistant carbon black according to any one of claims 1 to 7 is used.

10. Application of the low heat generation and high wear resistance carbon black as claimed in claim 9 in the field of new energy vehicle tires.

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