CN113800911A - Carbon dust collection powder recycling method - Google Patents
Carbon dust collection powder recycling method Download PDFInfo
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- CN113800911A CN113800911A CN202111019539.8A CN202111019539A CN113800911A CN 113800911 A CN113800911 A CN 113800911A CN 202111019539 A CN202111019539 A CN 202111019539A CN 113800911 A CN113800911 A CN 113800911A
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- 239000000428 dust Substances 0.000 title claims abstract description 49
- 239000000843 powder Substances 0.000 title claims abstract description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004064 recycling Methods 0.000 title claims abstract description 15
- 238000004898 kneading Methods 0.000 claims abstract description 25
- 239000010426 asphalt Substances 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 239000008187 granular material Substances 0.000 claims abstract description 13
- 238000007580 dry-mixing Methods 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000004806 packaging method and process Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000945 filler Substances 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63496—Bituminous materials, e.g. tar, pitch
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a carbon dust collection powder recycling method, which comprises the following steps: preparing solid medium-temperature asphalt and dust collecting powder; introducing heat conducting oil into the kneading pot for preheating; putting the dust-collecting powder into a kneading pot for dry mixing for 20 minutes, and then adding the prepared medium-temperature asphalt particles for wet mixing for 20 minutes; pouring the kneaded paste into an extrusion molding machine, and extruding the paste into a green body by using the extrusion molding machine; cooling the green body through a water tank to ensure that the temperature of the green body is cooled to be less than 45 ℃; packaging and bundling the cooled green bodies in groups; placing the bundled green bodies into a roasting furnace, and roasting for 168 hours in the air isolation, wherein the flame path temperature is 1150 ℃, and the blank temperature is 1050 ℃; cooling the roasted clinker to normal temperature; and crushing the roasted clinker cooled to normal temperature into 3-6mm granular materials by using a reverse impact crushing or cone crushing device, and using the granular materials as fillers in a roasting workshop. The invention can improve the utilization value of dust collecting powder and solve the problem of tailings generated in the production process of the anode carbon for aluminum.
Description
Technical Field
The invention belongs to the field of carbon blocks, and particularly relates to a recycling method of carbon dust.
Background
The anode carbon block is the heart of an electrolytic cell, a certain amount of dust collecting powder can be generated due to operations such as material conveying and damage in the production process of the anode carbon block, most of the dust collecting powder can be returned to a system for use, but a part of dust collecting powder (such as waste heat boiler dust collecting powder, return material dust collecting powder and anode scrap crushing system dust collecting powder) is still sold and treated at an extremely low price due to high ash content, so that great waste is caused, a method for recycling the dust collecting powder is urgently needed, and the economic value of the method is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: overcomes the defects of the prior art and provides a carbon dust collection powder recycling method which can improve the utilization value of the dust collection powder.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a carbon dust collecting powder recycling method comprises the following steps:
s1: preparing materials: preparing solid medium-temperature asphalt and dust collecting powder;
s2: preheating: introducing heat conducting oil into the kneading pot, and preheating the kneading pot;
s3: kneading: after preheating, putting the prepared dust collecting powder into the kneading pot, carrying out dry mixing, and after carrying out dry mixing for 20 minutes, adding the prepared medium-temperature asphalt particles, and carrying out wet mixing for 20 minutes to obtain a kneaded paste;
s4: molding: pouring the kneaded paste into an extrusion molding machine, and extruding the paste into a green body by using the extrusion molding machine;
s5: cooling for the first time: cooling the green body through a water tank to ensure that the temperature of the green body is cooled to be less than 45 ℃;
s6: packaging and bundling: packaging and bundling the cooled green bodies in groups;
s7: roasting: placing the bundled green bodies into a roasting furnace, and roasting for 168 hours in the air isolation, wherein the flame path temperature is 1150 ℃, and the blank temperature is 1050 ℃;
s8: and (3) cooling for the second time: cooling the roasted clinker to normal temperature;
s9: crushing: and crushing the roasted clinker cooled to normal temperature into granular materials by using a reverse impact crushing or cone crushing device, and using the granular materials as fillers in a roasting workshop.
When kneading is carried out in a kneading pot, the solid medium-temperature asphalt accounts for 15-25% of the total material, and the dust collecting powder accounts for 75-85% of the total material.
And dry-mixing the dust collection powder in the kneading pot, wherein the temperature of the dust collection powder is more than 100 ℃ after the dry mixing is carried out for 20 minutes.
The particle size of the granular material crushed by the impact crushing or cone crushing equipment is 3-6 mm.
The invention has the following positive beneficial effects:
the method is utilized to recycle the dust collection powder, most of high-ash dust collection powder, including waste heat boiler dust collection powder with high ash content, return material dust collection powder and residual anode crushing system dust collection powder, can be reprocessed, and finally crushed into 3-6mm granular materials after mixing kneading, molding, roasting and crushing treatment, and the granular materials are used as the roasting workshop fillers, so that the purpose of recycling the dust collection powder is achieved, and the utilization rate and the economic value of the dust collection powder are improved.
Drawings
FIG. 1 is a process flow diagram of a method for recycling carbon dust according to the present invention.
Detailed Description
The invention will be further explained and explained with reference to the accompanying drawing 1 and the specific embodiments:
example (b): a method for recycling carbon dust collecting powder comprises preparing solid medium temperature asphalt and dust collecting powder; the medium-temperature asphalt is a tar distillation residual liquid part, is black solid at normal temperature, accounts for 54-56% of tar, has no certain melting point, is melted in a certain melting point range, and has no thermal effect during solidification; the asphalt component is extremely complex, most of the asphalt component is aromatic hydrocarbons with more than three rings, and also contains heterocyclic compounds containing elements such as oxygen, nitrogen and sulfur and a small amount of high molecular carbon substances, and the molecular weight of the asphalt component is between 200 and 2000 and can reach 3000 at most; the medium-temperature asphalt is divided according to different softening points, and the medium-temperature asphalt with the softening point of 65-90 ℃;
collecting dust powder: the method refers to powdery carbon materials which are collected by dust removing equipment such as a dust remover, a multi-pipe cyclone dust remover and the like on a pulse belt and cannot be returned to a system for use due to high ash content in the production process of the anode carbon for aluminum.
After preparing solid medium-temperature asphalt and dust collecting powder, introducing heat conducting oil of 220 ℃ into a kneading pot, and preheating the kneading pot for 15 minutes to control the temperature of a cavity of the kneading pot to be 150 ℃ or 170 ℃; the heat conduction oil is also called heat transfer oil, has the performances of thermal cracking resistance and chemical oxidation resistance, has good heat transfer efficiency, quick heat dissipation and good thermal stability, and has the following characteristics as an industrial oil heat transfer medium: under the condition of almost normal pressure, very high operation temperature can be obtained, namely, the operation pressure and the safety requirement of a high-temperature heating system can be greatly reduced, and the reliability of the system and equipment is improved; the process requirements of heating and cooling at different temperatures can be met in a wider temperature range, or the process requirements of high-temperature heating and low-temperature cooling can be simultaneously realized by using the same heat conducting oil in the same system.
Preheating a kneading pot, putting materials with the total weight of 1000kg into the kneading pot in different categories, putting 750kg of 75 percent of dust collecting powder into the kneading pot, carrying out dry mixing, wherein after the dry mixing is carried out for 20 minutes, the temperature of the dust collecting powder reaches 110 ℃, then adding 250kg of 25 percent of medium-temperature asphalt particles into the kneading pot, and carrying out wet mixing for 20 minutes to obtain the kneaded paste with better plasticity;
the kneading pot is a device for uniformly stirring and mixing the materials such as carbon, asphalt and the like in a semi-dry state by the strong shearing action generated by a pair of blades which are matched and rotate mutually.
Pouring the kneaded paste into an extrusion molding machine, and extruding the paste into a green body by using the extrusion molding machine; cooling the green bodies through a water tank to cool the temperature of the green bodies to 42 ℃ or 40 ℃, and packaging and bundling the cooled green bodies in groups;
then placing the bundled green bodies into a roasting furnace, roasting for 168 hours in the air isolation, wherein the flame path temperature is 1150 ℃, and the blank temperature is 1050 ℃; after the baking is finished, cooling the baked green body to normal temperature; and crushing the roasted green body cooled to normal temperature into a granular material with the growth degree of 3mm by using a reverse impact crushing or conical crushing device, and using the granular material as a filling material in a roasting workshop, thereby achieving the purpose of recycling the dust collecting powder.
Example 2: the difference from example 1 is: the dust collecting powder accounts for 85 percent, and the medium temperature asphalt accounts for 15 percent.
Example 3: the difference from example 1 and example 2 is: and crushing the roasted green body cooled to the normal temperature into a granular material with the growth of 6mm by using a reverse crushing or cone crushing device.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (4)
1. A carbon dust collecting powder recycling method comprises the following steps:
s1: preparing materials: preparing solid medium-temperature asphalt and dust collecting powder;
s2: preheating: introducing heat conducting oil into the kneading pot, and preheating the kneading pot;
s3: kneading: after preheating, putting the prepared dust collecting powder into the kneading pot, carrying out dry mixing, and after carrying out dry mixing for 20 minutes, adding the prepared medium-temperature asphalt particles, and carrying out wet mixing for 20 minutes to obtain a kneaded paste;
s4: molding: pouring the kneaded paste into an extrusion molding machine, and extruding the paste into a green body by using the extrusion molding machine;
s5: cooling for the first time: cooling the green body through a water tank to ensure that the temperature of the green body is cooled to be less than 45 ℃;
s6: packaging and bundling: packaging and bundling the cooled green bodies in groups;
s7: roasting: placing the bundled green bodies into a roasting furnace, and roasting for 168 hours in the air isolation, wherein the flame path temperature is 1150 ℃, and the blank temperature is 1050 ℃;
s8: and (3) cooling for the second time: cooling the roasted clinker to normal temperature;
s9: crushing: and crushing the roasted clinker cooled to normal temperature into granular materials by using a reverse impact crushing or cone crushing device, and using the granular materials as fillers in a roasting workshop.
2. The method for recycling carbon dust collection powder of claim 1, wherein: when kneading is carried out in a kneading pot, the solid medium-temperature asphalt accounts for 15-25% of the total material, and the dust collecting powder accounts for 75-85% of the total material.
3. The method for recycling carbon dust collection powder of claim 1, wherein: and dry-mixing the dust collection powder in the kneading pot, wherein the temperature of the dust collection powder is more than 100 ℃ after the dry mixing is carried out for 20 minutes.
4. The method for recycling carbon dust collection powder of claim 1, wherein: the particle size of the granular material crushed by the impact crushing or cone crushing equipment is 3-6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111019539.8A CN113800911A (en) | 2021-09-01 | 2021-09-01 | Carbon dust collection powder recycling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111019539.8A CN113800911A (en) | 2021-09-01 | 2021-09-01 | Carbon dust collection powder recycling method |
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| CN113800911A true CN113800911A (en) | 2021-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246738A (en) * | 2022-08-11 | 2022-10-28 | 洛阳万基炭素有限公司 | Production method of carbon square bricks produced by carbon production hazardous waste products |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872791A (en) * | 2006-04-25 | 2006-12-06 | 山东铝业股份有限公司 | Sticking paste for guard ring of steel paws of prebaked anode in aluminium cell |
| CN102011147A (en) * | 2010-12-03 | 2011-04-13 | 伊川龙海科技实业有限公司 | Method for producing carbon electrodes by floating carbon powder and coal tar pitch with spent potlining (SPL) of aluminium electrolysis |
| CN102330115A (en) * | 2011-07-30 | 2012-01-25 | 湖南晟通科技集团有限公司 | Anode steel claw carbon protecting ring |
| CN102345142A (en) * | 2011-09-23 | 2012-02-08 | 中南大学 | Method for mixing and kneading carbon anode paste for aluminum electrolysis |
| CN103224397A (en) * | 2013-05-16 | 2013-07-31 | 任利华 | Method for producing high-density prebaked anode by adopting carbon intermediate |
| CN104386670A (en) * | 2014-04-23 | 2015-03-04 | 天津锦美碳材科技发展有限公司 | Isostatic-pressure high-purity graphite material and preparation method thereof |
| CN112453013A (en) * | 2020-10-15 | 2021-03-09 | 河南中孚炭素有限公司 | Harmless treatment method for waste cathode of aluminum electrolytic cell |
-
2021
- 2021-09-01 CN CN202111019539.8A patent/CN113800911A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872791A (en) * | 2006-04-25 | 2006-12-06 | 山东铝业股份有限公司 | Sticking paste for guard ring of steel paws of prebaked anode in aluminium cell |
| CN102011147A (en) * | 2010-12-03 | 2011-04-13 | 伊川龙海科技实业有限公司 | Method for producing carbon electrodes by floating carbon powder and coal tar pitch with spent potlining (SPL) of aluminium electrolysis |
| CN102330115A (en) * | 2011-07-30 | 2012-01-25 | 湖南晟通科技集团有限公司 | Anode steel claw carbon protecting ring |
| CN102345142A (en) * | 2011-09-23 | 2012-02-08 | 中南大学 | Method for mixing and kneading carbon anode paste for aluminum electrolysis |
| CN103224397A (en) * | 2013-05-16 | 2013-07-31 | 任利华 | Method for producing high-density prebaked anode by adopting carbon intermediate |
| CN104386670A (en) * | 2014-04-23 | 2015-03-04 | 天津锦美碳材科技发展有限公司 | Isostatic-pressure high-purity graphite material and preparation method thereof |
| CN112453013A (en) * | 2020-10-15 | 2021-03-09 | 河南中孚炭素有限公司 | Harmless treatment method for waste cathode of aluminum electrolytic cell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246738A (en) * | 2022-08-11 | 2022-10-28 | 洛阳万基炭素有限公司 | Production method of carbon square bricks produced by carbon production hazardous waste products |
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Application publication date: 20211217 |