CN106189377B - Production method of N330 carbon black - Google Patents
Production method of N330 carbon black Download PDFInfo
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- CN106189377B CN106189377B CN201610763384.1A CN201610763384A CN106189377B CN 106189377 B CN106189377 B CN 106189377B CN 201610763384 A CN201610763384 A CN 201610763384A CN 106189377 B CN106189377 B CN 106189377B
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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
- C09C1/565—Treatment of carbon black ; Purification comprising an oxidative treatment with oxygen, ozone or oxygenated compounds, e.g. when such treatment occurs in a region of the furnace next to the carbon black generating reaction zone
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- Pigments, Carbon Blacks, Or Wood Stains (AREA)
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Abstract
A production method of N330 carbon black, aiming at simple and practical process and better performance of the produced carbon black; the invention adopts the production of a hard carbon black reaction furnace, and the air and the natural gas entering the reaction furnaceThe gas volume ratio is 18-19: 1, generating more surplus air to participate in secondary combustion in the reaction chamber; the raw oil enters a reaction chamber with the spraying amount of 440 kg/h; the amount of the mixed gas of air and natural gas required by each kilogram of raw oil is 2-3m3(ii) a The temperature of the secondary combustion in the reaction chamber is controlled at 1500-1600 ℃; a plurality of air inlets are uniformly distributed on the burner along the radial direction, and the air inlet mode of natural gas is set as radial surrounding and axial simultaneous air inlet so as to improve the combustion efficiency; arranging a first quenching section and a second quenching section at the outlet of the reaction furnace, controlling the temperature of the first quenching section to be 900-; after wet granulation of carbon black, introducing mixed gas of tail gas generated in carbon black production and air, and drying the carbon black at the temperature of 300 ℃; the volume ratio of the tail gas to the air is 1.5-1.6: 1 and mixing.
Description
Technical Field
The invention relates to a production method of carbon black, in particular to a production method of N330 carbon black.
Background
The carbon black is a product obtained by incomplete combustion or thermal decomposition of organic matters such as natural gas, heavy oil and fuel oil under the condition of insufficient air. The N330 carbon black belongs to high wear-resistant carbon black, has good reinforcing performance, is mainly used as a rubber reinforcing agent to improve the physical mechanical property and dynamic property of rubber products, is applied to tire treads, cord fabric rubber, tire sides, conveyor belts, rubber rollers and various rubber industrial products, can endow rubber materials with better stretchability, tear resistance, wear resistance and elasticity, reduces compression heat generation, reduces rolling resistance to improve wet grip, and has wide application. China is a large country for tire production, and the carbon black industry has great market potential, but the carbon black industry has the problems of small sample number, immature technology, large scale difficulty, still severe situation and the like at present, and particularly, the production process of the hard carbon black is relatively complex, and the product performance is not easy to control.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a production method of N330 carbon black, which has simple and practical process, better carbon black performance, higher tensile strength and longer elongation at break of rubber produced by adding the carbon black.
Researches show that all performance indexes of the N330 carbon black, particularly tensile strength and elongation at break, can be improved by adjusting reaction time and reaction temperature and controlling the ratio of air to tail gas in a drying stage.
The production method of the N330 carbon black is carried out on a hard carbon black reaction furnace, and the invention improves the conventional production process on the basis of the traditional N330 carbon black production process as follows:
(1) controlling the volume ratio of air to natural gas entering the reaction furnace to be 18-19: 1 to create more marginGas enters the reaction chamber to participate in the secondary combustion of the raw oil in the reaction chamber, so that the temperature of the carbon black cracking reaction is increased; the raw oil enters a reaction chamber to participate in secondary combustion at the injection amount of 440 kg/h; the amount of the mixed gas of air and natural gas required by each kilogram of raw oil is about 2-3m3(ii) a The temperature of the secondary combustion in the reaction chamber is controlled at 1500-1600 ℃;
(2) a plurality of air inlets are uniformly distributed on the burner along the radial direction, the air inlet mode of natural gas is set as radial surrounding and axial simultaneous air inlet, so that the natural gas enters the reaction furnace along the radial direction and the axial direction of the burner in multiple directions, the combustion efficiency is improved, a uniform and high-temperature heat source is provided for carbon black cracking, the raw oil cracking reaction time is prolonged, and the surface oxidation time of the carbon black is prolonged;
(3) arranging a first quenching section and a second quenching section at the outlet of the reaction furnace, controlling the temperature of the first quenching section to be 900-;
(4) after wet granulation of carbon black, mixing tail gas generated by producing carbon black with air according to the volume ratio of 1.5-1.6: 1, introducing mixed gas of tail gas and air, drying the carbon black at the temperature of 300 ℃, and further oxidizing the carbon black in an oxidizing atmosphere by adding surplus air.
Meanwhile, the inner diameter of the carbon black reaction furnace is properly increased, so that the flow rate of flue gas can be reduced, and the surface oxidation time of carbon black can be prolonged.
The tail gas contains about 10 percent of CO and about 10 percent of H2The balance being N2、H2And inert gases such as O and the like are connected in series through a pore plate flowmeter and an adjusting valve to control the ratio of air to tail gas, the ratio of the tail gas to the air in complete combustion is 2.0 under normal conditions, the combustion temperature provided by the tail gas is 1200 ℃ during drying, the tail gas is directly contacted and dried with carbon black, the temperature of flue gas is reduced from 1200 ℃ to 250 ℃, the temperature of the carbon black is increased from 60 ℃ to 200 ℃, after the ratio of the tail gas to the air is adjusted from 2.0 to 1.6, about 20 percent of air is left, and the air is contacted and oxidized with the surface of the carbon black. At the same time, add the tailThe usage amount of the gas can increase the drying temperature of the carbon black from 180 ℃ to 300 ℃, which is more beneficial to the further reaction of the carbon black and oxygen. And cooling and dedusting the high-temperature carbon black by an air separation sieve, and then feeding the carbon black into a product storage tank.
The invention has simple and practical process, improves various performance indexes of the produced N330 carbon black, particularly obviously improves the tensile strength and the elongation at break after the N330 carbon black is added in the production of rubber, obviously improves the indexes of the compression heat generation and the rolling resistance of rubber products, and can reduce the compression heat generation and the rolling resistance of tires when being applied to the tires.
Detailed Description
The following examples are only preferred embodiments of the present invention and are not intended to limit the present invention in any way.
This example is an improvement of the N330 carbon black production process in a 2-ten thousand ton hard carbon black production reactor:
(1) controlling the volume ratio of air to natural gas, and adjusting the volume ratio from air/natural gas =16 to air/natural gas =18, so that more air participates in secondary combustion, and the temperature of the carbon black cracking reaction is increased; the raw oil enters the reaction chamber with the injection amount of 440kg/h, and the amount of the mixed gas of air and natural gas required by each kg of raw oil is about 2.5m3(ii) a The temperature of the secondary combustion in the reaction chamber is controlled at 1500-1600 ℃;
(2) the natural gas inlet mode is changed, 6 air inlets are radially and uniformly distributed on the burner, the original axial air inlet is changed into axial air inlet and radial air inlet simultaneously, the combustion efficiency is improved, in addition, the inner diameter of the carbon black reaction furnace is properly increased, DN500 is changed into DN600, the flow speed of flue gas is reduced, and the surface oxidation time of carbon black is prolonged.
(3) Raising the primary quenching temperature from the normal 700 ℃ to 900 ℃ to be beneficial to the oxidation of the surface of the carbon black, and additionally arranging a second quenching section with the temperature of 950-;
(4) in order to reduce the environmental pollution of carbon black packaging and transportation, wet granulation is needed, the carbon black needs to be dried to remove moisture after being subjected to wet granulation, in the drying process, tail gas generated by carbon black production is used as fuel, the tail gas generated by carbon black production is mixed with air according to the volume ratio of 1.6, mixed gas of the tail gas and the air is introduced, the carbon black is dried at the temperature of 300 ℃,
the N330 carbon black prepared by the method of this example was tested and compared with a general-purpose N330 carbon black, and rubber articles were prepared using the N330 carbon black of this example and the general-purpose N330 carbon black, respectively, under the same formulation and subjected to comparative tests. The results are shown in Table 1.
TABLE 1 comparison of the quality indexes of the N330 carbon black of this example and the general N330 carbon black
And (3) shearing the rubber compound piece into rubber compound test pieces with the length and width smaller than the length and width of the inner cavity of the vulcanizing mold, marking the rolling direction, and weighing (54 +/-1) g of each rubber compound piece. The temperature of a flat plate of the vulcanizing machine is adjusted to 145 +/-1 ℃, and the flat plate is placed on a mould to be preheated for 20min and then is quickly filled into the mould for vulcanization. And after the mold is filled, when the pressure applied to the mold reaches the requirement, timing is immediately carried out, and the allowable deviation of the vulcanization time is 20 s. The vulcanization time was 50 minutes. Standing the vulcanized rubber test piece at (23 +/-2) ℃ for 16-72 h, and then measuring the tensile property. The tensile properties were measured according to the GB/T528 specification, and the type 1 cutter specified in GB/T528 was used as the cutter type.
Claims (2)
1. A production method of N330 carbon black adopts a hard carbon black reaction furnace for production, and is characterized in that:
(1) controlling the volume ratio of air to natural gas entering the reaction furnace to be 18-19: 1, more surplus air is generated to enter a reaction chamber to participate in secondary combustion of raw oil in the reaction chamber, and the carbon black cracking reaction temperature is increased; the raw oil enters a reaction chamber to participate in secondary combustion at the injection amount of 440 kg/h; the amount of the mixed gas of air and natural gas required by each kilogram of raw oil is 2-3m3(ii) a The temperature of the secondary combustion in the reaction chamber is controlled at 1500-1600 ℃;
(2) a plurality of air inlets are uniformly distributed on the burner along the radial direction, and the air inlet mode of natural gas is set as radial surrounding and axial simultaneous air inlet so as to improve the combustion efficiency, provide a uniform high-temperature heat source for carbon black cracking, increase the raw oil cracking reaction time and prolong the carbon black surface oxidation time;
(3) arranging a first quenching section and a second quenching section at the outlet of the reaction furnace, controlling the temperature of the first quenching section to be 900-;
(4) after wet granulation of carbon black, introducing mixed gas of tail gas generated in carbon black production and air, drying the carbon black at the temperature of 300 ℃, and further oxidizing the carbon black in an oxidizing atmosphere by adding surplus air; the volume ratio of the tail gas to the air is 1.6: 1 and mixing.
2. The method of claim 1 wherein the air to tail gas ratio is controlled by an orifice-plate flowmeter and a series of control valves.
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| CN110511599A (en) * | 2019-09-04 | 2019-11-29 | 山西三强新能源科技有限公司 | Hard (carbon) black reacting furnace |
| CN111303668A (en) * | 2020-03-02 | 2020-06-19 | 乌海黑猫炭黑有限责任公司 | Low-energy-consumption high-pigment carbon black production method and production equipment thereof |
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| JPH059404A (en) * | 1991-07-03 | 1993-01-19 | Tokai Carbon Co Ltd | Preparation of carbon black |
| CN101831205B (en) * | 2010-04-30 | 2012-05-30 | 曲靖众一精细化工股份有限公司 | Method for producing carbon black from carbon black raw oil in relatively anaerobic state |
| CN101955694B (en) * | 2010-08-23 | 2014-07-16 | 上海焦化化工发展商社 | Oxygen-controlling gas-mixing method for producing acid carbon black |
| CN102174277B (en) * | 2011-03-11 | 2013-03-20 | 山西永东化工股份有限公司 | Method for producing superconducting carbon black with high specific surface area |
| DE102012010542A1 (en) * | 2011-12-20 | 2013-06-20 | CCP Technology GmbH | METHOD AND APPARATUS FOR GENERATING SYNTHESEGAS |
| CN102796403A (en) * | 2012-07-28 | 2012-11-28 | 山西永东化工股份有限公司 | Method for producing conductive carbon black for cable jackets |
| CN105647242B (en) * | 2016-04-07 | 2017-08-22 | 青岛黑猫炭黑科技有限责任公司 | A kind of reacting furnace for preparing ultra-wide aggregation distribution carbon black and preparation method thereof |
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