CN112371086A - Method for preparing magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as raw material - Google Patents
Method for preparing magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as raw material Download PDFInfo
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- CN112371086A CN112371086A CN202011237098.4A CN202011237098A CN112371086A CN 112371086 A CN112371086 A CN 112371086A CN 202011237098 A CN202011237098 A CN 202011237098A CN 112371086 A CN112371086 A CN 112371086A
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- tire powder
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- 239000010920 waste tyre Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000843 powder Substances 0.000 title claims abstract description 38
- 239000006229 carbon black Substances 0.000 title claims abstract description 36
- 239000003463 adsorbent Substances 0.000 title claims abstract description 30
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 19
- 239000002994 raw material Substances 0.000 title claims abstract description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 69
- 239000010935 stainless steel Substances 0.000 claims abstract description 69
- 239000000084 colloidal system Substances 0.000 claims abstract description 60
- 238000003756 stirring Methods 0.000 claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000007790 scraping Methods 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 10
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 10
- 235000005822 corn Nutrition 0.000 claims description 10
- 229960002089 ferrous chloride Drugs 0.000 claims description 10
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 10
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 238000001291 vacuum drying Methods 0.000 claims description 10
- 235000013312 flour Nutrition 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 235000011837 pasties Nutrition 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 241000209149 Zea Species 0.000 claims 2
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 abstract 3
- 238000000605 extraction Methods 0.000 abstract 1
- 240000008042 Zea mays Species 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 241000255925 Diptera Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229940044631 ferric chloride hexahydrate Drugs 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28009—Magnetic properties
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material, and relates to the field of preparation of magnetic carbon black adsorbents. Through being provided with cooling body and rabbling mechanism, because of cooling body air-cooler, the intake pipe, dust screen and outlet duct, when needs cool off the black colloid, the staff starts the air-cooler, the air-cooler so that intake pipe extraction outside air, the air gets into and can be cooled off by it behind the air-cooler, air conditioning gets into to the stainless steel ware through the outlet duct again in, and be provided with the dust screen because of the inside of intake pipe, can prevent that outside dust from getting into to the stainless steel ware in through the intake pipe, air conditioning gets into and can cool off the black colloid to the stainless steel ware in, staff's starting rabbling mechanism simultaneously, rabbling mechanism can stir the black colloid, so that the black colloid can fully contact with air conditioning, and then improve the cooling efficiency of black colloid.
Description
Technical Field
The invention relates to the field of preparation of magnetic carbon black adsorbents, in particular to a method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material.
Background
Nowadays, with the rapid development of industry and economy, the production of waste tires is increasing every year, the generation of large quantities of waste tires has caused negative environmental impact worldwide, and statistics show that the production of waste tires in 2015 is only about 1.5 hundred million in China, and is rapidly increasing at a rate of 8% -10% every year. A large amount of waste tires are accumulated for a long time, on one hand, a large amount of land resources are wasted, black pollution is formed, and on the other hand, secondary pollution caused by fire is easily caused; on the other hand, the waste tires are not biodegradable, are easy to breed mosquitoes and germs, and pose a great threat to the life health of human beings, so the waste tires are accelerated to be recycled, the problem of black pollution is solved, the problem that waste rubber resources in China are difficult to treat is relieved, and the positive effect of promoting the sustainable development of economy is achieved.
In developed countries, various recycling and recycling strategies have been adopted, in which used tires are recycled to obtain value-added products, such as their use as fuel derived from tires, their incorporation into asphalt for road paving, floor mats and liquid waste treatment, etc., and even in these applications, the large amount of discarded used tires per year cannot be reasonably disposed of, and therefore other possible applications, such as use as adsorbents, must be explored, the adsorption method being one of the common methods for removing heavy metals due to its special properties.
The carbon black serving as the solid part of the pyrolyzed waste tire not only has the property similar to that of commercial activated carbon, but also has the property of porosity, and the carbon black can be prepared into activated carbon with high surface area and porosity through proper modification, so that the activated carbon can be used for adsorbing heavy metals in a water body, and further the purpose of treating wastes with processes of wastes against one another is achieved. And the waste tires are effectively recycled and added with value by virtue of pyrolysis, so that multiple purposes are achieved.
According to the conventional method for preparing the magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material, as FeOOF solution is transferred into a stainless steel dish and stirred and heated to obtain black colloid, the black colloid needs to be cooled after being heated, but the black colloid is naturally cooled at present, so that a long time is needed, and the cooling mode is insufficient, so that the preparation efficiency of the magnetic carbon black adsorbent is reduced; meanwhile, black colloid is accumulated in the stainless steel dish, so that part of the black colloid can be adhered to the inside of the stainless steel dish and cannot be cleaned quickly, and the part of the black colloid can not be effectively prepared into the magnetic carbon black adsorbent and is wasted.
Disclosure of Invention
The invention aims to: in order to solve the problem that the black colloid is difficult to be rapidly cooled and cannot be rapidly cleaned, the method for preparing the magnetic carbon black adsorbent by pyrolysis by using waste tire powder as a raw material is provided.
In order to achieve the purpose, the invention provides the following technical scheme: a method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material comprises the following steps of taking the waste tire powder as a carbon black source and FeO as a magnetic carrier:
the method comprises the following steps:
dissolving 2.4-9.42 g of ferric trichloride hexahydrate and 0.92-3.5 g of ferrous dichloride tetrahydrate in 36-56 mL of deionized water, uniformly stirring, adding 2.4-7.8 g of sodium hydroxide, heating the formed mixed solution to 65-75 ℃, stirring and reacting for 0.8-1.2 h to obtain an FeO solution;
step two:
transferring the FeO solution obtained in the step one to a stainless steel dish, stirring and heating, heating to 80-100 ℃, adding 1-5 g of corn flour, and continuously stirring to be pasty to obtain a black colloid;
step three:
and then adding 5-10 g of waste tire powder into the black colloid obtained in the step two, and continuously stirring at 100 ℃ to enable the surface of the waste tire powder to be uniformly stained with the black colloid
Step four:
finally, covering a cover on the stainless steel dish, putting the stainless steel dish in an electric furnace, heating to 500-550 ℃ at a heating rate of 10-25 ℃/min, and continuously preserving heat for 10-50 min;
step five:
the solution in the stainless steel dish is cooled, cold air can be filled into the stainless steel dish through the arranged cooling mechanism and the stirring mechanism, the stirring mechanism can stir the mixed liquid in the stainless steel dish in the cooling process, the mixed liquid can be fully contacted with the cold air after being stirred, and the cooling efficiency of the cold air on the mixed liquid is further accelerated;
step six:
meanwhile, the scraping mechanism is arranged on the stainless steel dish, and as a lot of black colloid possibly remains on the inner wall of the stainless steel dish and is difficult to clean, the black colloid is not effectively utilized, so that the waste of the black colloid is easily caused, the scraping plate is arranged above the inside of the stainless steel dish, and the output end of the driving mechanism is contacted with the scraping plate;
step seven:
and then washing with ionized water to remove excessive sodium hydroxide, adding the mixed solution into a vacuum drier, and performing vacuum drying to obtain the magnetic carbon black adsorbent.
Preferably, in the first step, the dosage of the ferric trichloride hexahydrate is 7.08g, the dosage of the ferrous dichloride tetrahydrate is 2.64g, and the dosage of the sodium hydroxide is 6 g.
Preferably, in the step one, the stirring speed of the vigorous stirring is 350-450 r/min.
Preferably, in step two, the amount of said corn meal is 3 g.
Preferably, in step three, the amount of the waste tire powder is 7.5 g.
Preferably, in step five, cooling structure includes air-cooler, intake pipe, dust screen and play trachea, the inlet end of air-cooler is connected with the intake pipe, the end of giving vent to anger of air-cooler is connected with the air outlet pipe, the internally mounted of intake pipe has the dust screen, the dust screen is connected with intake pipe dismantlement.
Preferably, in step six, the scraping mechanism comprises a driving motor, a screw rod, a thread sleeve, a connecting plate, a pressing rod and a scraping plate, the output end of the driving motor is connected with the screw rod, the thread sleeve is sleeved on the outer surface of the screw rod, the connecting plates are fixed on two sides of the thread sleeve, the pressing rod is fixed on two sides of the bottom of the connecting plate, the scraping plate is connected to the bottom end of the pressing rod, and the outer wall of the scraping plate is in contact with the inner wall of the stainless steel vessel.
Preferably, the temperature required for vacuum drying in step seven is 60 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with the cooling mechanism and the stirring mechanism, and because the cooling mechanism is provided with the air cooler, the air inlet pipe, the dust screen and the air outlet pipe, when the black colloid needs to be cooled, a worker starts the air cooler, the air cooler enables the air inlet pipe to extract external air, the air is cooled by the air cooler after entering the air cooler, the cold air enters the stainless steel vessel through the air outlet pipe, the dust screen is arranged in the air inlet pipe, so that external dust can be prevented from entering the stainless steel vessel through the air inlet pipe, the black colloid can be cooled after cold air enters the stainless steel vessel, meanwhile, the worker can start the stirring mechanism, the stirring mechanism can stir the black colloid, so that the black colloid can be fully contacted with cold air, and further, the cooling efficiency of the black colloid is improved, and the cooling time of the black colloid is shortened, so that the preparation efficiency of the subsequent magnetic carbon black adsorbent is improved.
2. The invention is provided with the scraping mechanism which comprises a driving motor, a screw rod, a thread sleeve, a connecting plate, a pressure rod and a scraper, when the black colloid on the inner wall of the stainless steel vessel needs to be scraped, a worker starts the driving motor, the driving motor works to drive the screw rod to rotate, the screw rod rotates to enable the thread sleeve to move, the thread sleeve moves to drive the connecting plate to move, the connecting plate moves to drive the pressure rod to move, the pressure rod moves to drive the scraper to move, the black colloid on the inner wall of the stainless steel vessel can be cleaned when the scraper moves, the black colloid can fall to a discharge port after being scraped, and further the black colloid on the inner wall can be discharged from the discharge port of the stainless steel vessel, thereby avoiding part of the black colloid from adhering to the inner wall of the stainless steel vessel all the time and preventing the waste of the black colloid, and simultaneously improves the utilization rate of the catalyst.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be used in a particular manner
The first embodiment is as follows:
the invention provides a technical scheme that: a method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material comprises the following steps of taking the waste tire powder as a carbon black source and FeO as a magnetic carrier:
the method comprises the following steps:
dissolving 2.4-9.42 g of ferric trichloride hexahydrate and 0.92-3.5 g of ferrous dichloride tetrahydrate in 36-56 mL of deionized water, uniformly stirring, adding 2.4-7.8 g of sodium hydroxide, heating the formed mixed solution to 65-75 ℃, stirring and reacting for 0.8-1.2 h to obtain an FeO solution;
step two:
transferring the FeO solution obtained in the step one to a stainless steel dish, stirring and heating, heating to 80-100 ℃, adding 1-5 g of corn flour, and continuously stirring to be pasty to obtain a black colloid;
step three:
and then adding 5-10 g of waste tire powder into the black colloid obtained in the step two, and continuously stirring at 100 ℃ to enable the surface of the waste tire powder to be uniformly stained with the black colloid
Step four:
finally, covering a cover on the stainless steel dish, putting the stainless steel dish in an electric furnace, heating to 500-550 ℃ at a heating rate of 10-25 ℃/min, and continuously preserving heat for 10-50 min;
step five:
the solution in the stainless steel dish is cooled, cold air can be filled into the stainless steel dish through the arranged cooling mechanism and the stirring mechanism, the stirring mechanism can stir the mixed liquid in the stainless steel dish in the cooling process, the mixed liquid can be fully contacted with the cold air after being stirred, and the cooling efficiency of the cold air on the mixed liquid is further accelerated;
step six:
meanwhile, the scraping mechanism is arranged on the stainless steel dish, and as a lot of black colloid possibly remains on the inner wall of the stainless steel dish and is difficult to clean, the black colloid is not effectively utilized, so that the waste of the black colloid is easily caused, the scraping plate is arranged above the inside of the stainless steel dish, and the output end of the driving mechanism is contacted with the scraping plate;
step seven:
and then washing with ionized water to remove excessive sodium hydroxide, adding the mixed solution into a vacuum drier, and performing vacuum drying to obtain the magnetic carbon black adsorbent.
Further, in the first step, the dosage of the ferric trichloride hexahydrate is 7.08g, the dosage of the ferrous dichloride tetrahydrate is 2.64g, and the dosage of the sodium hydroxide is 6 g; in the first step, the stirring speed of the violent stirring is 350-450 r/min, the solution can be stirred, and the mixing efficiency of the solution is improved.
Further, in the second step, the dosage of the corn flour is 3 g; in step three, the amount of the waste tire powder is 7.5 g.
Further, in the fifth step, the cooling structure comprises an air cooler, an air inlet pipe, a dust screen and an air outlet pipe, the air inlet end of the air cooler is connected with the air inlet pipe, the air outlet end of the air cooler is connected with the air outlet pipe, the dust screen is installed inside the air inlet pipe and detachably connected with the air inlet pipe, and the dust screen can prevent external dust from entering the stainless steel vessel through the air inlet pipe, so that the purity of the black colloid is improved; in step six, scraping mechanism includes driving motor, lead screw, thread bush, connecting plate, depression bar and scraper blade, driving motor's output is connected with the lead screw, the thread bush has been cup jointed to the surface of lead screw, the both sides of thread bush all are fixed with the connecting plate, the bottom both sides of connecting plate all are fixed with the depression bar, the bottom of depression bar is connected with the scraper blade, just the outer wall of scraper blade contacts with the inner wall of stainless steel ware, conveniently strikes off the black colloid of stainless steel ware inner wall.
Further, the temperature required for vacuum drying in step seven was 60 ℃.
Example two:
the invention provides a technical scheme that: a method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material comprises the following steps of taking the waste tire powder as a carbon black source and FeO as a magnetic carrier:
the method comprises the following steps:
dissolving 4.8-18.82 g of ferric trichloride hexahydrate and 1.84-7 g of ferrous dichloride tetrahydrate in 72-112 mL of deionized water, uniformly stirring, adding 4.8-15.6 g of sodium hydroxide, heating the formed mixed solution to 65-75 ℃, stirring and reacting for 0.8-1.2 h to obtain an FeO solution;
step two:
transferring the FeO solution obtained in the step one to a stainless steel dish, stirring and heating, heating to 80-100 ℃, adding 2-10 g of corn flour, and continuously stirring to be pasty to obtain a black colloid;
step three:
and then 10-20 g of waste tire powder is added into the black colloid obtained in the step two, and the mixture is continuously stirred at the temperature of 100 ℃ to ensure that the surface of the waste tire powder is uniformly stained with the black colloid
Step four:
finally, covering a cover on the stainless steel dish, putting the stainless steel dish in an electric furnace, heating to 500-550 ℃ at a heating rate of 10-25 ℃/min, and continuously preserving heat for 10-50 min;
step five:
the solution in the stainless steel dish is cooled, cold air can be filled into the stainless steel dish through the arranged cooling mechanism and the stirring mechanism, the stirring mechanism can stir the mixed liquid in the stainless steel dish in the cooling process, the mixed liquid can be fully contacted with the cold air after being stirred, and the cooling efficiency of the cold air on the mixed liquid is further accelerated;
step six:
meanwhile, the scraping mechanism is arranged on the stainless steel dish, and as a lot of black colloid possibly remains on the inner wall of the stainless steel dish and is difficult to clean, the black colloid is not effectively utilized, so that the waste of the black colloid is easily caused, the scraping plate is arranged above the inside of the stainless steel dish, and the output end of the driving mechanism is contacted with the scraping plate;
step seven:
and then washing with ionized water to remove excessive sodium hydroxide, adding the mixed solution into a vacuum drier, and performing vacuum drying to obtain the magnetic carbon black adsorbent.
Further, in the first step, the dosage of the ferric trichloride hexahydrate is 14.16g, the dosage of the ferrous dichloride tetrahydrate is 5.28g, and the dosage of the sodium hydroxide is 12 g; in the first step, the stirring speed of the vigorous stirring is 350-450 r/min, the solution can be stirred, and the mixing efficiency among the solutions is improved.
Further, in the second step, the dosage of the corn flour is 6 g; in the third step, the amount of the waste tire powder is 15 g.
Further, in the fifth step, the cooling structure comprises an air cooler, an air inlet pipe, a dust screen and an air outlet pipe, the air inlet end of the air cooler is connected with the air inlet pipe, the air outlet end of the air cooler is connected with the air outlet pipe, the dust screen is installed inside the air inlet pipe and detachably connected with the air inlet pipe, and the dust screen can prevent external dust from entering the stainless steel vessel through the air inlet pipe, so that the purity of the black colloid is improved; in step six, scraping mechanism includes driving motor, lead screw, thread bush, connecting plate, depression bar and scraper blade, driving motor's output is connected with the lead screw, the thread bush has been cup jointed to the surface of lead screw, the both sides of thread bush all are fixed with the connecting plate, the bottom both sides of connecting plate all are fixed with the depression bar, the bottom of depression bar is connected with the scraper blade, just the outer wall of scraper blade contacts with the inner wall of stainless steel ware, conveniently strikes off the black colloid of stainless steel ware inner wall.
Further, the temperature required for vacuum drying in step seven was 60 ℃.
Example three:
the invention provides a technical scheme that: a method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material comprises the following steps of taking the waste tire powder as a carbon black source and FeO as a magnetic carrier:
the method comprises the following steps:
dissolving 6-20.02 g of ferric chloride hexahydrate and 2.04-9 g of ferrous dichloride tetrahydrate in 74-114 mL of deionized water, uniformly stirring, adding 6.8-17.6 g of sodium hydroxide, heating the formed mixed solution to 65-75 ℃, stirring and reacting for 0.8-1.2 h to obtain an FeO solution;
step two:
transferring the FeO solution obtained in the step one to a stainless steel dish, stirring and heating, heating to 80-100 ℃, adding 4-12 g of corn flour, and continuously stirring to be pasty to obtain a black colloid;
step three:
and then adding 12-22 g of waste tire powder into the black colloid obtained in the step two, and continuously stirring at 100 ℃ to enable the surface of the waste tire powder to be uniformly stained with the black colloid
Step four:
finally, covering a cover on the stainless steel dish, putting the stainless steel dish in an electric furnace, heating to 500-550 ℃ at a heating rate of 10-25 ℃/min, and continuously preserving heat for 10-50 min;
step five:
the solution in the stainless steel dish is cooled, cold air can be filled into the stainless steel dish through the arranged cooling mechanism and the stirring mechanism, the stirring mechanism can stir the mixed liquid in the stainless steel dish in the cooling process, the mixed liquid can be fully contacted with the cold air after being stirred, and the cooling efficiency of the cold air on the mixed liquid is further accelerated;
step six:
meanwhile, the scraping mechanism is arranged on the stainless steel dish, and as a lot of black colloid possibly remains on the inner wall of the stainless steel dish and is difficult to clean, the black colloid is not effectively utilized, so that the waste of the black colloid is easily caused, the scraping plate is arranged above the inside of the stainless steel dish, and the output end of the driving mechanism is contacted with the scraping plate;
step seven:
and then washing with ionized water to remove excessive sodium hydroxide, adding the mixed solution into a vacuum drier, and performing vacuum drying to obtain the magnetic carbon black adsorbent.
Further, in the first step, the dosage of the ferric trichloride hexahydrate is 16.16g, the dosage of the ferrous dichloride tetrahydrate is 7.28g, and the dosage of the sodium hydroxide is 14 g; in the first step, the stirring speed of the vigorous stirring is 350-450 r/min, the solution can be stirred, and the mixing efficiency among the solutions is improved.
Further, in the second step, the dosage of the corn flour is 8 g; in the third step, the amount of the waste tire powder is 17 g.
Further, in the fifth step, the cooling structure comprises an air cooler, an air inlet pipe, a dust screen and an air outlet pipe, the air inlet end of the air cooler is connected with the air inlet pipe, the air outlet end of the air cooler is connected with the air outlet pipe, the dust screen is installed inside the air inlet pipe and detachably connected with the air inlet pipe, and the dust screen can prevent external dust from entering the stainless steel vessel through the air inlet pipe, so that the purity of the black colloid is improved; in step six, scraping mechanism includes driving motor, lead screw, thread bush, connecting plate, depression bar and scraper blade, driving motor's output is connected with the lead screw, the thread bush has been cup jointed to the surface of lead screw, the both sides of thread bush all are fixed with the connecting plate, the bottom both sides of connecting plate all are fixed with the depression bar, the bottom of depression bar is connected with the scraper blade, just the outer wall of scraper blade contacts with the inner wall of stainless steel ware, conveniently strikes off the black colloid of stainless steel ware inner wall.
Further, the temperature required for vacuum drying in step seven was 60 ℃.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A method for preparing a magnetic carbon black adsorbent by pyrolysis by taking waste tire powder as a raw material comprises the steps of taking the waste tire powder as a carbon black source and FeO as a magnetic carrier, and is characterized in that: the method of the magnetic carbon black adsorbent comprises the following steps:
the method comprises the following steps:
dissolving 2.4-9.42 g of ferric trichloride hexahydrate and 0.92-3.5 g of ferrous dichloride tetrahydrate in 36-56 mL of deionized water, uniformly stirring, adding 2.4-7.8 g of sodium hydroxide, heating the formed mixed solution to 65-75 ℃, stirring and reacting for 0.8-1.2 h to obtain an FeO solution;
step two:
transferring the FeO solution obtained in the step one to a stainless steel vessel, stirring and heating, heating to 80-100 ℃, adding 1-5 g of corn flour, and continuously stirring to be pasty to obtain a black colloid;
step three:
and then adding 5-10 g of waste tire powder into the black colloid obtained in the step two, and continuously stirring at 100 ℃ to enable the surface of the waste tire powder to be uniformly stained with the black colloid
Step four:
finally, covering a cover on the stainless steel dish, putting the stainless steel dish in an electric furnace, heating to 500-550 ℃ at a heating rate of 10-25 ℃/min, and continuously preserving heat for 10-50 min;
step five:
the solution in the stainless steel dish is cooled, cold air can be filled into the stainless steel dish through the arranged cooling mechanism and the stirring mechanism, the stirring mechanism can stir the mixed liquid in the stainless steel dish in the cooling process, the mixed liquid can be fully contacted with the cold air after being stirred, and the cooling efficiency of the cold air on the mixed liquid is further accelerated;
step six:
meanwhile, the scraping mechanism is arranged on the stainless steel dish, and more black colloid possibly remains on the inner wall of the stainless steel dish and is difficult to clean, so that the black colloid is not effectively utilized, the waste of the black colloid is easily caused, the scraping plate is arranged above the inner part of the stainless steel dish, and the output end of the driving mechanism is in contact with the scraping plate;
step seven:
and then washing with ionized water to remove excessive sodium hydroxide, adding the mixed solution into a vacuum drier, and performing vacuum drying to obtain the magnetic carbon black adsorbent.
2. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: in the first step, the dosage of the ferric trichloride hexahydrate is 7.08g, the dosage of the ferrous dichloride tetrahydrate is 2.64g, and the dosage of the sodium hydroxide is 6 g.
3. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: in the first step, the stirring speed of the vigorous stirring is 350-450 r/min.
4. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: in the second step, the amount of the corn flour is 3 g.
5. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: in step three, the amount of the waste tire powder is 7.5 g.
6. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: in step five, the cooling structure includes air-cooler, intake pipe, dust screen and outlet duct, the inlet end of air-cooler is connected with the intake pipe, the end of giving vent to anger of air-cooler is connected with the outlet duct, the internally mounted of intake pipe has the dust screen, the dust screen is dismantled with the intake pipe and is connected.
7. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: in step six, the scraping mechanism includes driving motor, lead screw, thread bush, connecting plate, depression bar and scraper blade, driving motor's output is connected with the lead screw, the thread bush has been cup jointed to the surface of lead screw, the both sides of thread bush all are fixed with the connecting plate, the bottom both sides of connecting plate all are fixed with the depression bar, the bottom of depression bar is connected with the scraper blade, just the outer wall of scraper blade contacts with the inner wall of stainless steel ware.
8. The method for preparing the magnetic carbon black adsorbent by pyrolysis of the waste tire powder as the raw material according to claim 1, wherein the method comprises the following steps: the temperature required for vacuum drying in step seven was 60 ℃.
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