CN109054464B - Physical deashing process for tire cracking carbon black - Google Patents
Physical deashing process for tire cracking carbon black Download PDFInfo
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- CN109054464B CN109054464B CN201810947728.3A CN201810947728A CN109054464B CN 109054464 B CN109054464 B CN 109054464B CN 201810947728 A CN201810947728 A CN 201810947728A CN 109054464 B CN109054464 B CN 109054464B
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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
- C09C1/482—Preparation from used rubber products, e.g. tyres
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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
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
Abstract
The invention discloses a tire cracking carbon black physical deliming process, which comprises the following steps: firstly, mixing tire cracking carbon black with water to prepare carbon black ore pulp; secondly, feeding the carbon black ore pulp into an ultrasonic dispersion machine for dispersion to obtain dispersed carbon black ore pulp; thirdly, feeding the dispersed carbon black ore pulp into a Falcon centrifugal separator for separation to obtain separated concentrate and separated tailings; feeding the sorted concentrate into a BGT series surface modification pulp mixer, and adding kerosene and octanol for pulp mixing treatment to obtain pulp-mixed carbon black pulp; fifthly, feeding the pulp-mixing carbon black ore pulp into a flotation column for separation to obtain column separation concentrate and column separation tailings; sixthly, feeding the column selection concentrate into a filter press for dehydration treatment to obtain physical deashing concentrate; and seventhly, treating tailings. The method can realize physical separation of fine carbon black and ash impurities, has low treatment cost, simple and convenient operation and environmental protection, and realizes deashing and recycling of the tire cracking carbon black.
Description
Technical Field
The invention belongs to the technical field of deashing processes, and particularly relates to a tire cracking carbon black physical deashing process.
Background
Various additives are mixed in rubber materials in the manufacturing process of the tire, the additives are finally gathered in the cracking carbon black along with the cracking of the tire, and the ash content of the cracking carbon black is generally between 10 and 20 percent and is far higher than that of the commercial carbon black due to the fact that the cracking process and the tire source are different. The ash accounts for a large proportion in the cracking carbon black and has no reinforcing effect, the ash can cover active points on the surface of the cracking carbon black, the real surface of the cracking carbon black is prevented from being in direct contact with rubber molecular chains, and the amount of the carbon black actually filled in the rubber is reduced. Therefore, it is very urgent to research the ash removal method and process in the cracking carbon black.
The tire cracking carbon black and ash impurities have fine particle sizes and are not easy to separate by a conventional physical method. The existing main ash removal method is acid washing or acid-alkali washing treatment, but the treatment method has the defects of high operation cost, serious equipment corrosion, difficult maintenance and the like, particularly has difficult waste liquid treatment and serious environmental pollution, and does not meet the requirements of modern green environmental protection.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a physical deashing process for the tire cracking carbon black, solves the problems that the conventional physical method is not easy to separate the existing tire cracking carbon black and ash impurities due to fine granularity, and the existing acid washing or acid-alkali washing method treatment method has serious environmental pollution, and has the advantages of simplicity, low cost, easy operation, good effect and certain industrial popularization and application value.
In order to achieve the purpose, the invention adopts the technical scheme that: a tire cracking carbon black physical deashing process is characterized by comprising the following steps:
step one, mixing the tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 60 g/L-120 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic disperser is 3000W-4200W, and the dispersing time of the ultrasonic disperser is 15 min-30 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.2 MPa-0.25 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of the impeller of the BGT series surface modification slurry mixer is 2.0-2.5 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: the hardness of the water in the first step is 0-100 ℃ DH.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: the hardness of the water in step one is 50 ° DH.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: in the fourth step, the consumption of the kerosene is 3-10 kg/t of dry tire cracking carbon black, and the consumption of the octanol is 500-1500 g/t of dry tire cracking carbon black.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: in the fourth step, the dosage of the kerosene is 5-8 kg/t of dry tire cracking carbon black, and the dosage of the octanol is 900-1100 g/t of dry tire cracking carbon black.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: the kerosene amount in the fourth step is 6.5kg/t dry tire cracking carbon black, and the octanol amount is 1000g/t dry tire cracking carbon black.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: the concentration of the carbon black ore pulp in the step one is 90 g/L.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: and in the second step, the dispersing power of the ultrasonic disperser is 3600W, and the dispersing time of the ultrasonic disperser is 23 min.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: and the reverse water pressure of the Falcon centrifugal separator in the third step is 0.23 MPa.
The physical deashing process of the tire cracking carbon black is characterized by comprising the following steps of: and step four, the linear speed of the impeller of the BGT series surface modification pulp mixer is 2.2 m/s.
Compared with the prior art, the invention has the following advantages:
1. the process of the invention mainly utilizes various high-efficiency physical dispersing and sorting devices to achieve the purpose of dispersing and sorting the fine-grained tire cracked carbon black and ash impurities, and solves the problems of high ash content of the tire cracked carbon black, high operation cost, serious environmental pollution and the like of the existing chemical treatment method.
2. The method comprises the steps of mixing tire cracking carbon black and water to prepare ore pulp, feeding the ore pulp into an ultrasonic dispersion machine to fully disperse carbon black and ash impurities, feeding the ore pulp into a Falcon centrifugal separator to perform first high-efficiency flow membrane separation, mixing separated concentrate of the Falcon centrifugal separator with a BGT series surface modification pulp mixer to perform pulp mixing, feeding the mixed concentrate into a flotation column to perform second multiple mineralization microbubble separation, dehydrating the separated concentrate of the flotation column through a filter press to obtain tire cracking carbon black physically deashed concentrate, and combining separated tailings of the Falcon centrifugal separator with separated tailings of the flotation column and feeding the combined tailings into a tailing box. The physical deashing process for the tire cracking carbon black can realize the physical method separation of fine carbon black and ash impurities, has the advantages of low treatment cost, simple and convenient operation and environmental protection, is an effective method for realizing the deashing and recycling of the tire cracking carbon black and sustainable development, and has certain industrial popularization and application values.
The invention is described in further detail below with reference to the figures and examples.
Drawings
FIG. 1 is a flow chart of the tire cracked carbon black physical deliming process of the present invention.
Detailed Description
Example 1
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 90 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic disperser is 3600W, and the dispersing time of the ultrasonic disperser is 23 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.23 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the impeller linear speed of the BGT series surface modification slurry mixer is 2.2 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 50 ° DH.
In the embodiment, the kerosene is used in the fourth step in an amount of 6.5kg/t dry tire cracking carbon black, and the octanol is used in an amount of 1000g/t dry tire cracking carbon black.
Example 2
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing the tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 70 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic dispersing machine is 3400W, and the dispersing time of the ultrasonic dispersing machine is 26 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.24 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of an impeller of the BGT series surface modification slurry mixer is 2.4 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 80 ° DH.
In the embodiment, the kerosene is used in an amount of 5kg/t dry tire cracking carbon black in step four, and the octanol is used in an amount of 700g/t dry tire cracking carbon black.
Example 3
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 60 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic disperser is 4200W, and the dispersing time of the ultrasonic disperser is 15 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.22 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of an impeller of the BGT series surface modification slurry mixer is 2.1 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 70 ° DH.
In the embodiment, the kerosene is used in an amount of 4.5kg/t dry tire cracking carbon black in step four, and the octanol is used in an amount of 1400g/t dry tire cracking carbon black.
Example 4
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 110 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic dispersing machine is 3900W, and the dispersing time of the ultrasonic dispersing machine is 24 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.2 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the impeller linear speed of the BGT series surface modification slurry mixer is 2.2 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 100 ° DH.
In the embodiment, the kerosene is used in an amount of 9kg/t dry tire cracking carbon black in the fourth step, and the octanol is used in an amount of 1100g/t dry tire cracking carbon black.
Example 5
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing the tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 100 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic dispersing machine is 3000W, and the dispersing time of the ultrasonic dispersing machine is 20 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.22 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of an impeller of the BGT series surface modification slurry mixer is 2.5 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 40 ° DH.
In the embodiment, the kerosene is used in an amount of 10kg/t dry tire cracking carbon black in the fourth step, and the octanol is used in an amount of 500g/t dry tire cracking carbon black.
Example 6
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 85 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic disperser is 3800W, and the dispersing time of the ultrasonic disperser is 30 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.21 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of an impeller of the BGT series surface modification slurry mixer is 2.3 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 0 ° DH.
In the embodiment, the kerosene is used in an amount of 4kg/t dry tire cracking carbon black in step four, and the octanol is used in an amount of 1500g/t dry tire cracking carbon black.
Example 7
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 120 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic dispersing machine is 4000W, and the dispersing time of the ultrasonic dispersing machine is 18 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.23 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of an impeller of the BGT series surface modification slurry mixer is 2.4 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 60 ° DH.
In the embodiment, the kerosene is used in an amount of 8kg/t dry tire cracking carbon black in the fourth step, and the octanol is used in an amount of 900g/t dry tire cracking carbon black.
Example 8
With reference to fig. 1, the physical deashing process of the tire cracking carbon black of the present embodiment includes the following steps:
step one, mixing the tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 80 g/L;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic dispersing machine is 3200W, and the dispersing time of the ultrasonic dispersing machine is 28 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.25 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the impeller linear speed of the BGT series surface modification slurry mixer is 2.0 m/s;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
In this embodiment, the hardness of the water in the first step is 20 ° DH.
In the embodiment, the kerosene is used in an amount of 3kg/t dry tire cracking carbon black in step four, and the octanol is used in an amount of 1200g/t dry tire cracking carbon black.
Experiments show that by utilizing the physical deashing process of the tire cracking carbon black provided by the above examples 1 to 8, the tire cracking carbon black with the ash content of 17.82% can be sorted to obtain the physical deashing concentrate with the yield of 55.13% and the ash content of 12.37%. By utilizing a conventional one-time direct flotation process, as the particle size of the tire cracking carbon black is very fine, under the condition of the same amount of flotation reagents, the same carbon black can only be separated to obtain concentrate with the yield of 50.87% and the ash content of 15.98%. The chemical method for removing the ash content of the tire cracking carbon black has high cost, and simultaneously, the waste acid has serious environmental pollution and difficult subsequent treatment. Therefore, the process has great advantages through sorting indexes.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. A tire cracking carbon black physical deashing process is characterized by comprising the following steps:
step one, mixing the tire cracking carbon black with water to prepare carbon black ore pulp with the concentration of 60 g/L-120 g/L; the hardness of the water is 0-100 ℃ DH;
step two, feeding the carbon black ore pulp prepared in the step one into an ultrasonic dispersion machine for ultrasonic dispersion to obtain dispersed carbon black ore pulp; the dispersing power of the ultrasonic disperser is 3000W-4200W, and the dispersing time of the ultrasonic disperser is 15 min-30 min;
step three, feeding the dispersed carbon black ore pulp obtained in the step two into a Falcon centrifugal separator for separation to obtain a Falcon centrifugal separator separation concentrate and a Falcon centrifugal separator separation tailing; the reverse water pressure of the Falcon centrifugal separator is 0.2 MPa-0.25 MPa;
step four, feeding the concentrate separated by the Falcon centrifugal separator obtained in the step three into a BGT series surface modification pulp mixer, and adding kerosene and secondary octanol into the BGT series surface modification pulp mixer for pulp mixing treatment to obtain pulp-mixed carbon black pulp; the linear speed of the impeller of the BGT series surface modification slurry mixer is 2.0-2.5 m/s; the amount of the kerosene is 3-10 kg/t of dry tire cracking carbon black, and the amount of the octanol is 500-1500 g/t of dry tire cracking carbon black;
step five, feeding the pulp-mixing carbon black ore pulp obtained in the step four into a flotation column for separation to obtain column separation concentrate and column separation tailings;
step six, feeding the column selection concentrate obtained in the step five into a filter press for dehydration treatment to obtain a finished product, namely, a physical deashing concentrate;
and step seven, feeding the separated tailings of the Falcon centrifugal separator obtained in the step three and the column separated tailings obtained in the step five into a tailing box.
2. The physical deashing process of a tire cracking carbon black according to claim 1, characterized in that: the hardness of the water in step one is 50 ° DH.
3. The physical deashing process of a tire cracking carbon black according to claim 1, characterized in that: in the fourth step, the dosage of the kerosene is 5-8 kg/t of dry tire cracking carbon black, and the dosage of the octanol is 900-1100 g/t of dry tire cracking carbon black.
4. A tire cracking carbon black physical deashing process according to claim 3, characterized in that: the kerosene amount in the fourth step is 6.5kg/t dry tire cracking carbon black, and the octanol amount is 1000g/t dry tire cracking carbon black.
5. The physical deashing process of a tire cracking carbon black according to claim 1, characterized in that: the concentration of the carbon black ore pulp in the step one is 90 g/L.
6. The physical deashing process of a tire cracking carbon black according to claim 1, characterized in that: and in the second step, the dispersing power of the ultrasonic disperser is 3600W, and the dispersing time of the ultrasonic disperser is 23 min.
7. The physical deashing process of a tire cracking carbon black according to claim 1, characterized in that: and the reverse water pressure of the Falcon centrifugal separator in the third step is 0.23 MPa.
8. The physical deashing process of a tire cracking carbon black according to claim 1, characterized in that: and step four, the linear speed of the impeller of the BGT series surface modification pulp mixer is 2.2 m/s.
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