CN113637339B - Production method of carbon black for green tire with high wear resistance and low rolling resistance - Google Patents
Production method of carbon black for green tire with high wear resistance and low rolling resistance Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/50—Furnace black ; Preparation thereof
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/56—Treatment of carbon black ; Purification
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/56—Treatment of carbon black ; Purification
- C09C1/58—Agglomerating, pelleting, or the like by wet methods
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2006/19—Oil-absorption capacity, e.g. DBP values
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- C—CHEMISTRY; METALLURGY
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/21—Attrition-index or crushing strength of granulates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/65—Chroma (C*)
Abstract
The invention relates to a production method of high wear-resistant low rolling resistance green tire carbon black, which comprises the steps of adopting 100% high-quality anthracene oil as a production raw material, secondarily treating the anthracene oil by a slag, oil and water three-phase separator to remove moisture and impurities, maintaining the high temperature of 1950-2050 ℃ in a multi-stage reaction furnace to generate carbon black reaction, adding a novel non-metal ion filler, adopting desalted softened water as quenching water to terminate the reaction, recycling the waste heat of carbon black smoke, collecting the waste heat of the carbon black smoke by a bag filtering box, collecting the waste heat by a pipeline foreign matter removing device and the like, and finally obtaining the finished product carbon black by a granulator for granulating, drying, screening, cleaning, packaging and the like. The product produced by the invention has better stretching stress and stronger wear resistance, which indicates that the carbon black has excellent wear resistance and low rolling resistance, and is the low rolling resistance wear-resistant carbon black required by the current green tire industry.
Description
Technical Field
The invention relates to a production method of carbon black for a green tire with high wear resistance and low rolling resistance.
Background
In recent years, the domestic tire industry is faced with various problems such as technical barriers to the tire labeling method and trade rubs and the like. Many countries are also placing increasing demands on the performance of tires, and more countries are constantly being incumbent or have implemented tire tag regulations.
Currently, the tire industry in China promotes the industrialized development of green tires to achieve consensus, and combines the energy-saving and consumption-reducing requirements in China to prepare green tire industrialization regulations meeting national conditions, so that energy conservation, environmental protection and low carbon are one of the topics of wide attention in the domestic and foreign tire industry, the tire product structure is being transformed towards tubeless, wide-section, wear-resistant, wet-skid-resistant, low-noise, light-weight and high-end directions, and the defects of insufficient wear resistance, high heat generation, poor wet-skid resistance, noise and the like of the tubeless radial tires at present are overcome. The technical staff of the tire company continuously changes the formula, such as N134, N115, N121 and other super wear-resistant carbon black is used, but the effect is not obvious, and the main reasons are that the carbon black is the carbon black of the traditional process, the design of a carbon black reaction furnace is unreasonable, the combustion chamber of the traditional reaction furnace is a single air inlet, the number of fuel oil spray guns is one, the reaction in the combustion chamber is too concentrated, the reaction flow rate of the carbon black is unstable, the temperature of the combustion chamber is uneven, the structure and the particle size distribution of the carbon black cannot meet the requirements of green environment-friendly tires, and the additive produced by the carbon black is too solidified singly; in the actual production of carbon black, the impurity content and the moisture content in the raw oil are too high, so that the reaction structure of the carbon black is also restricted, the raw oil and the production device inevitably produce impurities such as scrap iron, and the existing device has fewer links for removing the impurities by means of the cleaning magnet, so that the product quality is unstable. The mixing time is long, the mixing temperature is high, the mixing energy consumption is high, the processing safety is not guaranteed, the wet skid resistance is poor, the noise is high, and the hysteresis property is obvious. Therefore, development of a new carbon black variety which has higher surface area, superhigh structure, good reinforcement and low hysteresis performance and can meet the requirements of superhigh mileage radial tire, high-speed radial tire and racing tire on high strength, high abrasion resistance and high wet skid resistance is urgently needed.
Disclosure of Invention
The invention provides a production method of carbon black for a high-wear-resistance low-rolling-resistance green tire, which solves the technical problem of developing a novel carbon black variety which has higher surface area, an ultrahigh structure, good reinforcement and low hysteresis property and can meet the requirements of high strength, high wear resistance and high wet skid resistance of ultrahigh mileage radial tires, high-speed grade radial tires and racing tires.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for producing carbon black for green tires with high wear resistance and low rolling resistance,
adding boric acid into anthracene oil, and uniformly mixing to obtain an anthracene oil boric acid mixture;
preheating an anthracene oil boric acid mixture to 210 ℃;
inputting air and fuel gas into a combustion section of the reaction furnace, wherein the volume ratio of the air to the fuel gas is 15:1, a step of;
when the temperature of the combustion section is 1950-2050 ℃, adding the preheated anthracene oil boric acid mixture into the throat section of the reaction furnace;
the flow rate of the flue gas generated by the combustion section is 180 m/s-200 m/s;
the flow rate of the anthracene oil boric acid mixture is 4700 kg/h-5200 kg/h, and the raw material is 2.6 MPa-3.2 MPa;
spraying cold water into the first quenching section of the reaction furnace to terminate anthracene oil reaction;
the anthracene oil reaction time is 0.05s-0.1s;
the mass ratio of anthracene oil to boric acid is 60:1.
The anthracene oil boric acid mixture is added into the throat section of the reaction furnace by adopting an oil gun; the oil guns are connected in series; the diameter of the nozzle of the oil gun is 1.8mm-2.2mm, and the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm.
When the anthracene oil reaction is terminated, the carbon black smoke temperature is 950 ℃;
the carbon black for the green tire with high wear resistance and low rolling resistance is prepared by the following steps:
1) Carbon black and tail gas separation: the carbon black flue gas is sent into a high-temperature air preheater, the heat exchange is carried out by the preheater, the temperature of the inlet air is heated to 850 ℃, the inlet air enters a waste heat boiler, then enters a venturi tube, secondary soft water quenching is carried out at the venturi tube, the temperature is reduced to 260 ℃, the inlet air enters a bag filter collecting device for separating carbon black from tail gas, the carbon black is collected, the tail gas passes through a filter bag, and a part of the tail gas is sent to a tail gas combustion furnace for combustion by a tail gas fan, and a part of the tail gas is sent to the thermal power boiler for power generation;
2) Crushing: the collected carbon black enters a micron pulverizer through a conveying pipeline foreign matter removing device, and the carbon black is further pulverized into carbon black powder with the particle size of microns;
3) Granulating: feeding the carbon black powder into a wet granulator, mixing with granulating water, and granulating to obtain crude carbon black particles; the flow rate of the granulating water is controlled to be 3800kg/h to 4500kg/h;
4) And (3) drying: the crude carbon black particles enter a carbon black dryer for dehydration and drying until the moisture content of the carbon black is less than or equal to 0.1%, and the carbon black for the green tire with high wear resistance and low rolling resistance is obtained through multistage lifting, screening, cleaning magnetism and dust collection;
the granulating water is a mixed solution of binder preparation solution with a certain concentration and desalted water according to a mass ratio of 1:20.
The fuel in the carbon black dryer is the mixed gas of the combustible tail gas and air in the proportion of 2:1 in the step 1), the inlet temperature of the dryer is 1050-1150 ℃, and the outlet temperature is 180-220 ℃.
The binder is one or more of lignin, maltose and starch;
the mass ratio of the binder to the water in the binder formulation was 1:10.
The anthracene oil is subjected to secondary processing, and is prepared according to the following steps:
and (3) separating the residue, water and oil from the anthracene oil by a three-phase separator to obtain the anthracene oil with the water content less than or equal to 0.1% and the ash content less than or equal to 0.05%.
The number of the oil guns is 8, and the oil guns are connected in series.
The invention has the following beneficial technical effects:
1. according to the method, the anthracene oil is subjected to pretreatment, the water content is controlled to be less than or equal to 0.1%, the ash content is controlled to be less than or equal to 0.05%, and boric acid is added, so that the prepared carbon black has the advantages of being high in surface area, high in structure and reinforcement, low in hysteresis property, and the requirements of ultra-high mileage radial tires, high-speed radial tires and racing tires on high strength, high wear resistance and high wet skid resistance can be met.
2. According to the method, the anthracene oil is subjected to secondary processing, slag, water and oil are separated from the anthracene oil through a three-phase separator, the anthracene oil with moisture less than or equal to 0.1% and ash less than or equal to 0.05% is obtained, heating and preheating are firstly carried out before entering a reaction furnace to participate in the reaction, and the anthracene oil is preheated to 220 ℃ through a raw oil preheater, so that the preheating temperature of a mixture of the anthracene oil and boric acid can be improved, the atomization effect of the mixture of the anthracene oil and boric acid during cracking is improved, the cracking reaction is more sufficient, and meanwhile, when excessive moisture and impurities exist in the anthracene oil, the oil temperature of the anthracene oil entering a furnace is improved too high, so that the moisture in the anthracene oil is vaporized, and the counting display of a flowmeter is abnormal; meanwhile, as the nozzle of the oil gun is limited, excessive impurities can block the nozzle of the oil gun; both of the above conditions can affect the production of the present application.
3. The oil gun with the nozzle diameter of 1.8-2.2 mm is determined by the design of the oil gun, and the oil gun is characterized in that under the condition of a certain oil inlet amount, the larger the nozzle is, the smaller the furnace inlet pressure is, the nozzle is too small, the flow rate of raw oil into the furnace is insufficient, after the conditions of the two sides are balanced, the aperture of 1.8-2.2 mm is adopted, so that the flow rate of the raw oil is ensured to meet the production requirement, and the furnace inlet pressure of the raw oil is ensured to meet the technical requirement.
4. According to the method, the nozzle is limited to be 1.8-2.2 mm, the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm, the prepared carbon black can improve the coloring degree, the oil absorption value can not be reduced, and meanwhile, the gun head can not be burnt out by the high temperature in the reaction furnace.
5. According to the method, secondary processing is carried out on anthracene oil, the anthracene oil is separated from slag, water and oil through a three-phase separator, the anthracene oil with moisture less than or equal to 0.1% and ash less than or equal to 0.05% is obtained, the preheating temperature of a mixture of anthracene oil and boric acid is improved, so that the atomization effect of the mixture of anthracene oil and boric acid during cracking is improved, the oil gun with a nozzle of 1.8-2.2 mm and the stretching distance of the nozzle on the inner wall of a reaction furnace are 10mm, the reaction time can be shortened, and the specific surface area and the coloring strength of carbon black are improved.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example 1
A method for producing carbon black for green tires with high wear resistance and low rolling resistance,
adding boric acid into anthracene oil, and uniformly mixing to obtain an anthracene oil boric acid mixture;
preheating an anthracene oil boric acid mixture to 210 ℃;
inputting air and fuel gas into a combustion section of the reaction furnace, wherein the volume ratio of the air to the fuel gas is 15:1, a step of;
when the temperature of the combustion section is 2000 ℃, adding the preheated anthracene oil boric acid mixture into the throat section of the reaction furnace;
the flow rate of the flue gas generated by the combustion section is 190m/s;
the flow rate of the anthracene oil boric acid mixture is 4900kg/h, and the raw material is 2.8Mpa;
spraying cold water into the quenching section of the reaction furnace to terminate anthracene oil reaction;
the anthracene oil reaction time is 0.08s;
the mass ratio of anthracene oil to boric acid is 60:1.
The anthracene oil boric acid mixture is added into the throat section of the reaction furnace by adopting an oil gun; the oil guns are connected in series; the diameter of the nozzle of the oil gun is 1.8mm, and the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm.
When the anthracene oil reaction is terminated, the carbon black smoke temperature is 750 ℃;
the carbon black for the green tire with high wear resistance and low rolling resistance is prepared by the following steps:
1) Carbon black and tail gas separation: the carbon black flue gas is sent into a high-temperature air preheater, the heat exchange is carried out by the preheater, the temperature of the inlet air is heated to 850 ℃, the inlet air enters a waste heat boiler, then enters a venturi tube, secondary soft water quenching is carried out at the venturi tube, the temperature is reduced to 260 ℃, the inlet air enters a bag filter collecting device for separating carbon black from tail gas, the carbon black is collected, the tail gas passes through a filter bag, and a part of the tail gas is sent to a tail gas combustion furnace for combustion by a tail gas fan, and a part of the tail gas is sent to the thermal power boiler for power generation;
2) Crushing: the collected carbon black enters a micron pulverizer through a conveying pipeline foreign matter removing device, and the carbon black is further pulverized into carbon black powder with the particle size of microns;
3) Granulating: feeding the carbon black powder into a wet granulator, mixing with granulating water, and granulating to obtain crude carbon black particles; the flow rate of the granulating water is controlled to be 4200kg/h;
4) And (3) drying: the crude carbon black particles enter a carbon black dryer for dehydration and drying until the moisture content of the carbon black is less than or equal to 0.5%, and the carbon black for the green tire with high wear resistance and low rolling resistance is obtained through multistage lifting, screening, cleaning magnetism and dust collection;
the granulating water is a mixed solution of binder preparation solution with a certain concentration and desalted water according to a mass ratio of 1:20.
The fuel in the carbon black dryer is the mixed gas of the combustible tail gas and air in the proportion of 2:1 in the step 1), the inlet temperature of the dryer is 1100 ℃, and the outlet temperature is 200 ℃.
The binder is one or more of lignin, maltose and starch;
the mass ratio of the binder to the water in the binder formulation was 1:10.
The anthracene oil is subjected to secondary processing, and is prepared according to the following steps:
and (3) separating the residue, water and oil from the anthracene oil by a three-phase separator to obtain the anthracene oil with the water content less than or equal to 0.1% and the ash content less than or equal to 0.05%.
The number of the oil guns is 8, and the oil guns are connected in series.
Example 2
A method for producing carbon black for green tires with high wear resistance and low rolling resistance,
adding boric acid into anthracene oil, and uniformly mixing to obtain an anthracene oil boric acid mixture;
preheating an anthracene oil boric acid mixture to 210 ℃;
inputting air and fuel gas into a combustion section of the reaction furnace, wherein the volume ratio of the air to the fuel gas is 15:1, a step of;
when the temperature of the combustion section is 1980 ℃, adding the preheated anthracene oil boric acid mixture into the throat section of the reaction furnace;
the flow rate of the flue gas generated by the combustion section is 200m/s;
the flow rate of the anthracene oil boric acid mixture is 4800kg/h, and the raw material is 2.8Mpa;
spraying cold water into the quenching section of the reaction furnace to terminate anthracene oil reaction;
the anthracene oil reaction time is 0.08s;
the mass ratio of anthracene oil to boric acid is 60:1.
The anthracene oil boric acid mixture is added into the throat section of the reaction furnace by adopting an oil gun; the diameter of the nozzle of the oil gun is 2.0mm, and the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm.
When the anthracene oil reaction is terminated, the carbon black smoke temperature is 750 ℃;
the carbon black for the green tire with high wear resistance and low rolling resistance is prepared by the following steps:
1) Carbon black and tail gas separation: the carbon black flue gas is sent into a high-temperature air preheater, the heat exchange is carried out by the preheater, the temperature of the inlet air is heated to 850 ℃, the inlet air enters a waste heat boiler, then enters a venturi tube, secondary soft water quenching is carried out at the venturi tube, the temperature is reduced to 260 ℃, the inlet air enters a bag filter collecting device for separating carbon black from tail gas, the carbon black is collected, the tail gas passes through a filter bag, and a part of the tail gas is sent to a tail gas combustion furnace for combustion by a tail gas fan, and a part of the tail gas is sent to the thermal power boiler for power generation;
2) Crushing: the collected carbon black enters a micron pulverizer through a conveying pipeline foreign matter removing device, and the carbon black is further pulverized into carbon black powder with the particle size of microns;
3) Granulating: feeding the carbon black powder into a wet granulator, mixing with granulating water, and granulating to obtain crude carbon black particles; the flow rate of granulating water is controlled to be 3900kg/h;
4) And (3) drying: the crude carbon black particles enter a carbon black dryer for dehydration and drying until the moisture content of the carbon black is less than or equal to 0.2%, and the carbon black for the green tire with high wear resistance and low rolling resistance is obtained through multistage lifting, screening, cleaning magnetism and dust collection;
the granulating water is a mixed solution of binder preparation solution with a certain concentration and desalted water according to a mass ratio of 1:20.
The fuel in the carbon black dryer is the mixed gas of the combustible tail gas and air in the proportion of 2:1 in the step 1), the inlet temperature of the dryer is 1080 ℃, and the outlet temperature is 190 ℃.
The binder is one or more of lignin, maltose and starch;
the mass ratio of the binder to the water in the binder formulation was 1:10.
The anthracene oil is subjected to secondary processing, and is prepared according to the following steps:
and (3) separating the residue, water and oil from the anthracene oil by a three-phase separator to obtain the anthracene oil with the water content less than or equal to 0.1% and the ash content less than or equal to 0.05%.
The number of the oil guns is 8, and the oil guns are connected in series.
Example 3
A method for producing carbon black for green tires with high wear resistance and low rolling resistance,
adding boric acid into anthracene oil, and uniformly mixing to obtain an anthracene oil boric acid mixture;
preheating an anthracene oil boric acid mixture to 210 ℃;
inputting air and fuel gas into a combustion section of the reaction furnace, wherein the volume ratio of the air to the fuel gas is 15:1, a step of;
when the temperature of the combustion section is 1990 ℃, adding the preheated anthracene oil boric acid mixture into the throat section of the reaction furnace;
the flow rate of the flue gas generated by the combustion section is 200m/s;
the flow rate of the anthracene oil boric acid mixture is 5100kg/h, and the raw material is 3.0Mpa;
spraying cold water into the quenching section of the reaction furnace to terminate anthracene oil reaction;
the anthracene oil reaction time is 0.09s;
the mass ratio of anthracene oil to boric acid is 60:1.
The anthracene oil boric acid mixture is added into the throat section of the reaction furnace by adopting an oil gun; the oil guns are connected in series; the diameter of the nozzle of the oil gun is 1.9mm, and the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm.
When the anthracene oil reaction is terminated, the carbon black smoke temperature is 750 ℃;
the carbon black for the green tire with high wear resistance and low rolling resistance is prepared by the following steps:
1) Carbon black and tail gas separation: the carbon black flue gas is sent into a high-temperature air preheater, the heat exchange is carried out by the preheater, the temperature of the inlet air is heated to 850 ℃, the inlet air enters a waste heat boiler, then enters a venturi tube, secondary soft water quenching is carried out at the venturi tube, the temperature is reduced to 260 ℃, the inlet air enters a bag filter collecting device for separating carbon black from tail gas, the carbon black is collected, the tail gas passes through a filter bag, and a part of the tail gas is sent to a tail gas combustion furnace for combustion by a tail gas fan, and a part of the tail gas is sent to the thermal power boiler for power generation;
2) Crushing: the collected carbon black enters a micron pulverizer through a conveying pipeline foreign matter removing device, and the carbon black is further pulverized into carbon black powder with the particle size of microns;
3) Granulating: feeding the carbon black powder into a wet granulator, mixing with granulating water, and granulating to obtain crude carbon black particles; the flow rate of the granulating water is controlled to be 4200kg/h;
4) And (3) drying: the crude carbon black particles enter a carbon black dryer for dehydration and drying until the moisture content of the carbon black is less than or equal to 0.5%, and the carbon black for the green tire with high wear resistance and low rolling resistance is obtained through multistage lifting, screening, cleaning magnetism and dust collection;
the granulating water is a mixed solution of binder preparation solution with a certain concentration and desalted water according to a mass ratio of 1:20.
The fuel in the carbon black dryer is the mixed gas of the combustible tail gas and air in the proportion of 2:1 in the step 1), the inlet temperature of the dryer is 1100 ℃, and the outlet temperature is 200 ℃.
The binder is one or more of lignin, maltose and starch;
the mass ratio of the binder to the water in the binder formulation was 1:10.
The anthracene oil is subjected to secondary processing, and is prepared according to the following steps:
and (3) separating the residue, water and oil from the anthracene oil by a three-phase separator to obtain the anthracene oil with the water content less than or equal to 0.1% and the ash content less than or equal to 0.05%.
The number of the oil guns is 10, which are connected in series.
Example 4
A method for producing carbon black for green tires with high wear resistance and low rolling resistance,
adding boric acid into anthracene oil, and uniformly mixing to obtain an anthracene oil boric acid mixture;
preheating an anthracene oil boric acid mixture to 210 ℃;
inputting air and fuel gas into a combustion section of the reaction furnace, wherein the volume ratio of the air to the fuel gas is 15:1, a step of;
when the temperature of the combustion section is 2000 ℃, adding the preheated anthracene oil boric acid mixture into the throat section of the reaction furnace;
the flow rate of the flue gas generated by the combustion section is 185m/s;
the flow rate of the anthracene oil boric acid mixture is 4960kg/h, and the raw material is 2.8Mpa;
spraying cold water into the quenching section of the reaction furnace to terminate anthracene oil reaction;
the anthracene oil reaction time is 0.05s;
the mass ratio of anthracene oil to boric acid is 60:1.
The anthracene oil boric acid mixture is added into the throat section of the reaction furnace by adopting an oil gun; the oil guns are connected in series; the diameter of the nozzle of the oil gun is 2.0mm, and the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm.
When the anthracene oil reaction is terminated, the carbon black smoke temperature is 750 ℃;
the carbon black for the green tire with high wear resistance and low rolling resistance is prepared by the following steps:
1) Carbon black and tail gas separation: the carbon black flue gas is sent into a high-temperature air preheater, the heat exchange is carried out by the preheater, the temperature of the inlet air is heated to 850 ℃, the inlet air enters a waste heat boiler, then enters a venturi tube, secondary soft water quenching is carried out at the venturi tube, the temperature is reduced to 260 ℃, the inlet air enters a bag filter collecting device for separating carbon black from tail gas, the carbon black is collected, the tail gas passes through a filter bag, and a part of the tail gas is sent to a tail gas combustion furnace for combustion by a tail gas fan, and a part of the tail gas is sent to the thermal power boiler for power generation;
2) Crushing: the collected carbon black enters a micron pulverizer through a conveying pipeline foreign matter removing device, and the carbon black is further pulverized into carbon black powder with the particle size of microns;
3) Granulating: feeding the carbon black powder into a wet granulator, mixing with granulating water, and granulating to obtain crude carbon black particles; the flow rate of granulating water is controlled at 4000kg/h;
4) And (3) drying: the crude carbon black particles enter a carbon black dryer for dehydration and drying until the moisture content of the carbon black is less than or equal to 0.2%, and the carbon black for the green tire with high wear resistance and low rolling resistance is obtained through multistage lifting, screening, cleaning magnetism and dust collection;
the granulating water is a mixed solution of binder preparation solution with a certain concentration and desalted water according to a mass ratio of 1:20.
The fuel in the carbon black dryer is the mixed gas of the combustible tail gas and air in the proportion of 2:1 in the step 1), the inlet temperature of the dryer is 1100 ℃, and the outlet temperature is 190 ℃.
The binder is one or more of lignin, maltose and starch;
the mass ratio of the binder to the water in the binder formulation was 1:10.
The anthracene oil is subjected to secondary processing, and is prepared according to the following steps:
and (3) separating the residue, water and oil from the anthracene oil by a three-phase separator to obtain the anthracene oil with the water content less than or equal to 0.1% and the ash content less than or equal to 0.05%.
The number of the oil guns is 6, which are connected in series.
The beneficial effects of the invention are further illustrated below in conjunction with experimental data:
test material
1 materials and methods:
1.1 test sites: shandong Nernst carbon black Limited national laboratory.
1.2 experimental detection: the material is compared with indexes of a certain domestic product and a certain foreign product;
1.3 test materials: a foreign carbon black, inventive example 1 and a domestic conventional carbon black;
1.4 experimental implementation: the sampling test is carried out according to the national carbon black detection standard, wherein the iodine absorption value is detected by using GB/T3780.1-2006 standard, the oil absorption value is detected by using GB/T3780.2-2007 standard, the compression oil absorption value is detected by using GB/T3780.4-2008 standard, the nitrogen adsorption specific surface is detected by using GB/T3780.5-2008 standard, the coloring strength is detected by using GB/T3780.6-2007 standard, the heating decrement is detected by using GB/T3780.8-2008 standard, the particle strength is detected by using GB/T14853.6-2002 standard, the ash is detected by using GB/T3780.10-2009 standard, the impurity is detected by using GB/T3780.12-2007 standard, and the toluene light transmittance is detected by using GB/T3780.15-2006 standard.
2 results and analysis
The experimental results are shown in Table 1
Experiment two
Test material
1 materials and methods:
1.1 test sites: universal group Baotong tire laboratory;
1.2 experimental detection: the application of the carbon black of the invention in rubber sizing material is compared with the application of a certain domestic product in table 1 and a certain foreign carbon black in table 1;
1.3 test materials: table 1 Chinese inner traditional carbon black, table 1 Chinese foreign carbon black and inventive example 1;
1.4 experimental implementation: the carbon black application standard was tested using GB/T3778-2019.
Comparison of sizing material properties:
1.5 formulation experiments set up: in order to study the performance difference between the carbon black and the comparative carbon black, the formula of the tread rubber of the all-steel radial tire is adopted, and three carbon blacks are respectively studied. The experimental formulation is shown in Table 2, wherein the three groups Q1, Q2 and Q3 differ in the carbon black added; wherein Q1 is added to the Chinese external carbon black of Table 1, Q2 is added to the domestic carbon black of Table 1, and Table 3 is added to the carbon black prepared in example 1.
TABLE 2 Experimental formulation of sizing Properties
Detection conditions and item attention: zinc oxide and stearic acid are added separately
1. Stopping for 8 hours after the completion of the vulcanization to start the vulcanization; the tensile strength, elongation at break, 100% elongation stress, 300% elongation stress, aldrich abrasion and DIN abrasion index of vulcanization at 145℃for 30min were measured
2. Comparison of the Properties of vulcanized rubber before and after aging at 100℃for 48 hours in a tank
1.6 Effect of carbon Black Properties on tread rubber Properties
The effect of three carbon blacks on the properties of the vulcanizate at 145℃and 30min of vulcanization time is shown in Table 3.
TABLE 3 influence of the carbon black addition on the elongation of the rubber for a vulcanization time of 30
As can be seen from the table above: when the vulcanization time is 30' at 145 ℃, the stress of the carbon black is highest, and compared with 300% stress of the traditional carbon black in China, the stress of the carbon black is improved by 7.8%, the Aldrich abrasion is reduced by 0.015g/km, and the DIN abrasion index is improved by 7.1%. The hardness of the vulcanized rubber filled with the carbon black is increased, and the wear resistance is improved.
1.7 comparison of the Properties of the vulcanizate before and after aging:
vulcanization conditions: 145 ℃ and 30 'of vulcanizing time'
Aging conditions: the carriage is subjected to heat aging at 100 ℃ for 48 hours
2 results and analysis
The results of the experiment are shown in Table 4
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From Table 4, it can be seen that the main advantages of both the overseas product and the product of the invention are represented by dynamic elastic modulus analysis, the bottom temperature rise and the middle temperature rise are obviously reduced, the tear strength is improved by about 20% compared with the overseas product, meanwhile, the G' is higher, the tan delta is lower, which indicates that the carbon black of the invention has excellent wear resistance and low rolling resistance, and is the carbon black with low rolling resistance required by the current tire industry. Compared with the comparative carbon black, the carbon black of the invention has higher stretching stress and better wear resistance, and is the carbon black with low rolling resistance required by the current tire industry.
Claims (4)
1. A production method of carbon black for a green tire with high wear resistance and low rolling resistance is characterized by comprising the following steps:
adding boric acid into anthracene oil, and uniformly mixing to obtain an anthracene oil boric acid mixture;
preheating an anthracene oil boric acid mixture to 210 ℃;
inputting air and fuel gas into a combustion section of the reaction furnace, wherein the volume ratio of the air to the fuel gas is 15:1, a step of;
when the temperature of the combustion section is 1950-2050 ℃, adding the preheated anthracene oil boric acid mixture into the throat section of the reaction furnace;
the flow rate of the flue gas generated by the combustion section is 180 m/s-200 m/s;
the flow rate of the anthracene oil boric acid mixture is 4700 kg/h-5200 kg/h, and the raw material is 2.6 MPa-3.2 MPa;
spraying cold water into the quenching section of the reaction furnace to terminate anthracene oil reaction;
the anthracene oil reaction time is 0.05s-0.1s;
the mass ratio of anthracene oil to boric acid is 60:1;
the anthracene oil is subjected to secondary processing, and is prepared according to the following steps:
separating the residue, water and oil from the anthracene oil by a three-phase separator to obtain anthracene oil with water content less than or equal to 0.1% and ash content less than or equal to 0.05%;
the anthracene oil boric acid mixture is added into the throat section of the reaction furnace by adopting an oil gun; the number of the oil guns is 8 which are connected in series; the diameter of the nozzle of the oil gun is 1.8mm-2.2mm, and the extending distance of the nozzle on the inner wall of the reaction furnace is 10mm.
2. The method for producing carbon black for green tire with high wear resistance and low rolling resistance according to claim 1, wherein the carbon black smoke temperature is 950 ℃ when the anthracene oil reaction is terminated;
the carbon black for the green tire with high wear resistance and low rolling resistance is prepared by the following steps:
1) Carbon black and tail gas separation: the carbon black flue gas is sent into a high-temperature air preheater, the air temperature of the air entering the furnace is heated to 850 ℃ through heat exchange of the air preheater, the air enters a waste heat boiler and raw oil preheater, then enters a venturi tube, secondary soft water quenching is carried out at the venturi tube, the temperature is reduced to 260 ℃, the air enters a bag filter collecting device for separating carbon black from tail gas, the carbon black is collected, the tail gas passes through a filter bag and is sent to a tail gas combustion furnace for combustion through a tail gas fan, and the tail gas is sent to the thermal power boiler for power generation;
2) Crushing: the collected carbon black enters a micron pulverizer through a conveying pipeline foreign matter removing device, and the carbon black is further pulverized into carbon black powder with the particle size of microns;
3) Granulating: feeding the carbon black powder into a wet granulator, mixing with granulating water, and granulating to obtain crude carbon black particles;
the flow rate of the granulating water is controlled to be 3800kg/h to 4500kg/h;
4) And (3) drying: the crude carbon black particles enter a carbon black dryer for dehydration and drying until the moisture content of the carbon black is less than or equal to 0.1%, and the carbon black for the green tire with high wear resistance and low rolling resistance is obtained through multistage lifting, screening, cleaning magnetism and dust collection;
the granulating water is a mixed solution of binder preparation solution with a certain concentration and desalted water according to a mass ratio of 1:20.
3. The method for producing carbon black for green tire with high wear resistance and low rolling resistance according to claim 2, wherein the fuel in the carbon black dryer is the mixed gas of the combustible tail gas and air in the proportion of 2:1 in the step 1), the inlet temperature of the dryer is 1050-1150 ℃, and the outlet temperature is 180-220 ℃.
4. The method for producing carbon black for green tire with high abrasion resistance and low rolling resistance according to claim 2, wherein the binder is one or more of lignin, maltose and starch;
the mass ratio of the binder to the water in the binder formulation was 1:10.
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