CN115466121A - Preparation method of graphite electrode - Google Patents
Preparation method of graphite electrode Download PDFInfo
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- CN115466121A CN115466121A CN202211331659.6A CN202211331659A CN115466121A CN 115466121 A CN115466121 A CN 115466121A CN 202211331659 A CN202211331659 A CN 202211331659A CN 115466121 A CN115466121 A CN 115466121A
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- asphalt
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 155
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 122
- 239000010439 graphite Substances 0.000 title claims abstract description 122
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000000571 coke Substances 0.000 claims abstract description 118
- 229910021382 natural graphite Inorganic materials 0.000 claims abstract description 51
- 239000010426 asphalt Substances 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 36
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003830 anthracite Substances 0.000 claims abstract description 35
- 239000011331 needle coke Substances 0.000 claims abstract description 35
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002245 particle Substances 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 26
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 25
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000292 calcium oxide Substances 0.000 claims abstract description 25
- 239000006004 Quartz sand Substances 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 23
- 239000000057 synthetic resin Substances 0.000 claims abstract description 23
- 239000007770 graphite material Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000006253 pitch coke Substances 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 18
- 238000012216 screening Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000004898 kneading Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005242 forging Methods 0.000 claims description 6
- 238000003837 high-temperature calcination Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 2
- 238000007598 dipping method Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000005087 graphitization Methods 0.000 description 7
- 238000005470 impregnation Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000003754 machining Methods 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
- 239000003973 paint Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000011334 petroleum pitch coke Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
- C04B35/522—Graphite
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- 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
- C04B35/532—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 containing a carbonisable binder
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention discloses a preparation method of a graphite electrode, which comprises solid carbon and a binder, wherein the solid carbon comprises graphite coke, needle coke, pitch coke, metallurgical coke, anthracite, natural graphite and graphite fragments; the adhesive comprises bonding asphalt and synthetic resin, and auxiliary materials comprising quartz sand, metallurgical coke particles, calcium oxide, ferric oxide and copper powder are also used in the production and processing process; and preparing an impregnant, wherein the impregnant comprises anthracene oil. According to the preparation method of the graphite electrode, calcium oxide, ferric oxide and copper powder are added, so that the strength of the finished graphite electrode can be effectively improved, and the graphite electrode has higher strength; after the graphite material is subjected to dipping treatment, the porosity of the surface of a material product is reduced, the density is improved, the compressive strength is increased, the resistivity of a finished product is reduced, the ash powder cannot fly during subsequent mechanical processing of the raw material, and a smoother product surface can be obtained.
Description
Technical Field
The invention relates to the technical field of graphite electrodes, in particular to a preparation method of a graphite electrode.
Background
The graphite electrode is a high-temperature-resistant graphite conductive material which is prepared by taking petroleum coke and pitch coke as aggregates and coal pitch as an adhesive through raw material calcination, crushing and grinding, batching, kneading, molding, roasting, dipping, graphitization and machining, is a conductor for heating and melting furnace burden by releasing electric energy in an electric arc mode in an electric arc furnace, can be divided into common power, high power and high strength according to low quality index, and is different from a natural graphite electrode prepared by taking natural graphite as a raw material;
however, the surface of the graphite electrode is easily abraded by scraping, and due to the limitation of the material, the graphite electrode is poor in impact resistance and extremely easy to damage.
We have therefore proposed a method of preparing a graphite electrode in order to solve the problems set forth above.
Disclosure of Invention
The invention aims to provide a preparation method of a graphite electrode, which aims to solve the problems in the market brought forward by the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a graphite electrode comprises the following preparation material components: comprises solid carbon and a binder, wherein the solid carbon comprises graphite coke, needle coke, pitch coke, metallurgical coke, anthracite, natural graphite and graphite fragments; the adhesive comprises bonding asphalt and synthetic resin, and auxiliary materials comprising quartz sand, metallurgical coke particles, calcium oxide, ferric oxide and copper powder are also used in the production and processing process;
meanwhile, an impregnant is prepared, and the impregnant comprises anthracene oil.
Preferably, the preparation material consists of the following components in parts by weight: 30-35 parts of graphite coke, 20-25 parts of needle coke, 10-15 parts of asphalt coke, 18-22 parts of metallurgical coke, 10 parts of anthracite, 50-55 parts of natural graphite and graphite fragments, 20-25 parts of bonding asphalt and synthetic resin, 1-3 parts of calcium oxide, 5-8 parts of copper powder, 0.5-0.7 part of ferric oxide, 5-7 parts of quartz sand and 10 parts of metallurgical coke particles.
Preferably, the preparation material consists of the following components in parts by weight: 30 parts of graphite coke, 20 parts of needle coke, 10 parts of asphalt coke, 18 parts of metallurgical coke, 10 parts of anthracite, 50 parts of natural graphite and crushed graphite, 20 parts of bonding asphalt and synthetic resin, 1 part of calcium oxide, 5 parts of copper powder, 0.5 part of iron sesquioxide, 5 parts of quartz sand and 10 parts of metallurgical coke particles.
Preferably, the preparation material consists of the following components in parts by weight: 33 parts of graphite coke, 23 parts of needle coke, 13 parts of asphalt coke, 20 parts of metallurgical coke, 10 parts of anthracite, 53 parts of natural graphite and crushed graphite, 23 parts of bonding asphalt and synthetic resin, 2 parts of calcium oxide, 6 parts of copper powder, 0.6 part of ferric oxide, 6 parts of quartz sand and 10 parts of metallurgical coke particles.
Preferably, the preparation material consists of the following components in parts by weight: 35 parts of graphite coke, 25 parts of needle coke, 15 parts of asphalt coke, 22 parts of metallurgical coke, 10 parts of anthracite, 55 parts of natural graphite and graphite fragments, 25 parts of bonding asphalt and synthetic resin, 3 parts of calcium oxide, 8 parts of copper powder, 0.7 part of ferric oxide, 5-7 parts of quartz sand and 10 parts of metallurgical coke particles.
A preparation method of a graphite electrode comprises the following specific steps:
s1, preparing raw materials, weighing the raw materials in parts by weight:
s2, preparing an impregnant, namely anthracene oil;
s21, putting the graphite materials, namely graphite coke, natural graphite and graphite fragments in the raw materials into anthracene oil to be soaked for 8-10 hours;
s23, after soaking, fishing out the graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, and draining for preparation
S31, respectively crushing the graphite coke, the needle coke, the asphalt coke, the metallurgical coke, the anthracite, the natural graphite and the graphite fragments in the step S1, and screening for later use;
s32, conveying the screened qualified raw materials to the next forging process through automatic blanking equipment;
s33, putting the quartz sand, the metallurgical coke particles, the calcium oxide, the ferric oxide and the copper powder in the step S1 into a ball mill for grinding, and screening the ground particles to obtain a required mixture I for later use;
s4, carrying out high-temperature calcination treatment on graphite coke, needle coke, anthracite, natural graphite and graphite fragments in the solid carbonaceous raw material at the temperature of 1200-1500 ℃ under the condition of air isolation;
s41, after the calcination is finished, standing for 60-72h for natural cooling;
s5, fully mixing the needle coke, the pitch coke, the metallurgical coke and the anthracite which are crushed in the step S3 to prepare a required mixture II, and adding the mixture I and the mixture II which are prepared in the step S3 and the soaked graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, into a kneading pot for mixing treatment for later use;
s51, mixing and stirring the raw materials in the step S5, adding the melted bonding asphalt and the melted synthetic resin by using a feeding mechanism, and heating and uniformly stirring to obtain a paste;
s52, putting the paste into a press to obtain a raw product, and carrying out primary roasting, impregnation and secondary roasting on the raw product to obtain a roasted product;
s6, loading the roasted product into an inner-series graphitizing furnace for graphitizing treatment to obtain a graphitized product;
s7, processing the graphitized product into finished products with different specifications according to technical requirements to obtain the high-strength graphite electrode;
and S8, packaging and warehousing the graphite electrode prepared in the step S8 by using a vacuum bag.
Compared with the prior art, the invention has the beneficial effects that: a method for preparing the graphite electrode;
1. in the manufacturing process of the graphite electrode, calcium oxide, ferric oxide and copper powder are added, so that the strength of the finished graphite electrode can be effectively improved, the finished graphite electrode has higher strength, high melting point and high elastic coefficient, and the addition of the ferric oxide and the copper powder enhances the good electrical heat conductivity of the graphite electrode, improves the wear resistance of the graphite electrode, and prolongs the service life and performance of the graphite electrode;
2. in the manufacturing process of the graphite electrode, graphite materials, namely graphite coke, natural graphite and graphite fragments, are subjected to impregnation treatment in anthracene oil, so that the porosity of the surface of a material product is reduced, the density is improved, the compressive strength is increased, the resistivity of a finished product is reduced, the physical and chemical properties of the product are changed, and oil is infiltrated into the graphite materials, namely the graphite coke, the natural graphite and the graphite fragments, after the impregnation treatment, so that ash powder is prevented from flying during subsequent mechanical processing of the raw materials, and a smoother product surface can be obtained.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The invention provides a technical scheme that: a preparation method of a graphite electrode comprises the following steps: the preparation material components of the graphite electrode are as follows: comprises solid carbon and a binder, wherein the solid carbon comprises graphite coke, needle coke, pitch coke, metallurgical coke, anthracite, natural graphite and graphite fragments; the adhesive comprises adhesive asphalt and synthetic resin, auxiliary materials including quartz sand, metallurgical coke particles, calcium oxide, ferric oxide and copper powder are used in the production and processing process, and an impregnant is required to be prepared, wherein the impregnant comprises anthracene oil;
according to the weight portion: 30-35 parts of graphite coke, 20-25 parts of needle coke, 10-15 parts of asphalt coke, 18-22 parts of metallurgical coke, 10 parts of anthracite, 50-55 parts of natural graphite and graphite fragments, 20-25 parts of bonding asphalt and synthetic resin, 1-3 parts of calcium oxide, 5-8 parts of copper powder, 0.5-0.7 part of ferric oxide, 5-7 parts of quartz sand and 10 parts of metallurgical coke particles;
example 1:
s1, preparing raw materials, namely weighing 30 parts of graphite coke, 20 parts of needle coke, 10 parts of asphalt coke, 18 parts of metallurgical coke, 10 parts of anthracite, 50 parts of natural graphite and graphite fragments, 20 parts of bonding asphalt and synthetic resin, 1 part of calcium oxide, 5 parts of copper powder, 0.5 part of ferric oxide, 5 parts of quartz sand and 10 parts of metallurgical coke particles:
s2, preparing an impregnant, namely anthracene oil;
s21, putting the graphite materials, namely graphite coke, natural graphite and graphite fragments in the raw materials into anthracene oil to be soaked for 8-10 hours;
s23, after soaking, fishing out the graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, and draining for preparation
S31, respectively crushing the graphite coke, the needle coke, the asphalt coke, the metallurgical coke, the anthracite, the natural graphite and the crushed graphite in the step S1, and screening for later use;
s32, conveying the screened qualified raw materials to the next forging process through automatic blanking equipment;
s33, putting the quartz sand, the metallurgical coke particles, the calcium oxide, the ferric oxide and the copper powder in the step S1 into a ball mill for grinding, and screening the ground particles to obtain a required mixture I for later use;
s4, carrying out high-temperature calcination treatment on graphite coke, needle coke, anthracite, natural graphite and graphite fragments in the solid carbonaceous raw material at the temperature of 1200-1500 ℃ under the condition of air isolation;
s41, after the calcination is finished, standing for 60-72h for natural cooling;
s5, fully mixing the needle coke, the pitch coke, the metallurgical coke and the anthracite which are crushed in the step S3 to prepare a required mixture II, and adding the mixture I and the mixture II which are prepared in the step S3 and the soaked graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, into a kneading pot for mixing treatment for later use;
s51, mixing and stirring the raw materials in the step S5, adding the melted bonding asphalt and the melted synthetic resin by using a feeding mechanism, and heating and stirring uniformly to obtain paste;
s52, putting the paste into a press to prepare a raw product, and roasting the raw product for the first time, impregnating and roasting for the second time to obtain a roasted product;
s6, loading the roasted product into an inner-series graphitization furnace for graphitization treatment to obtain a graphitized product;
s7, processing the graphitized product into finished products with different specifications according to the technical requirements to obtain the high-strength graphite electrode;
and S8, packaging and warehousing the graphite electrode prepared in the step S8 by using a vacuum bag.
Example 2:
s1, preparing raw materials, namely weighing 33 parts of graphite coke, 23 parts of needle coke, 13 parts of pitch coke, 20 parts of metallurgical coke, 10 parts of anthracite, 53 parts of natural graphite and crushed graphite, 23 parts of bonding asphalt and synthetic resin, 2 parts of calcium oxide, 6 parts of copper powder, 0.6 part of ferric oxide, 6 parts of quartz sand and 10 parts of metallurgical coke particles:
s2, preparing an impregnant, namely anthracene oil;
s21, putting the graphite materials, namely graphite coke, natural graphite and graphite fragments in the raw materials into anthracene oil to be soaked for 8-10 hours;
s23, after soaking, fishing out the graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, and draining for preparation
S31, respectively crushing the graphite coke, the needle coke, the asphalt coke, the metallurgical coke, the anthracite, the natural graphite and the crushed graphite in the step S1, and screening for later use;
s32, conveying the screened qualified raw materials to the next forging process through automatic blanking equipment;
s33, putting the quartz sand, the metallurgical coke particles, the calcium oxide, the ferric oxide and the copper powder in the step S1 into a ball mill for grinding, and screening the ground particles to obtain a required mixture I for later use;
s4, carrying out high-temperature calcination treatment on graphite coke, needle coke, anthracite, natural graphite and graphite fragments in the solid carbonaceous raw material at the temperature of 1200-1500 ℃ under the condition of air isolation;
s41, after the calcination is finished, standing for 60-72h for natural cooling;
s5, fully mixing the needle coke, the pitch coke, the metallurgical coke and the anthracite which are crushed in the step S3 to prepare a required mixture II, and adding the mixture I and the mixture II which are prepared in the step S3 and the soaked graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, into a kneading pot for mixing treatment for later use;
s51, mixing and stirring the raw materials in the step S5, adding the melted bonding asphalt and the melted synthetic resin by using a feeding mechanism, and heating and uniformly stirring to obtain a paste;
s52, putting the paste into a press to prepare a raw product, and roasting the raw product for the first time, impregnating and roasting for the second time to obtain a roasted product;
s6, loading the roasted product into an inner-series graphitization furnace for graphitization treatment to obtain a graphitized product;
s7, processing the graphitized product into finished products with different specifications according to the technical requirements to obtain the high-strength graphite electrode;
and S8, packaging and warehousing the graphite electrode prepared in the step S8 by using a vacuum bag.
Example 3:
s1, preparing raw materials, namely weighing 35 parts of graphite coke, 25 parts of needle coke, 15 parts of asphalt coke, 22 parts of metallurgical coke, 10 parts of anthracite, 55 parts of natural graphite and graphite fragments, 25 parts of bonding asphalt and synthetic resin, 3 parts of calcium oxide, 8 parts of copper powder, 0.7 part of ferric oxide, 7 parts of quartz sand and 10 parts of metallurgical coke particles:
s2, preparing an impregnant, namely anthracene oil;
s21, putting the graphite materials, namely graphite coke, natural graphite and graphite fragments in the raw materials into anthracene oil to be soaked for 8-10 hours;
s23, after soaking, fishing out the graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, and draining for preparation
S31, respectively crushing the graphite coke, the needle coke, the asphalt coke, the metallurgical coke, the anthracite, the natural graphite and the crushed graphite in the step S1, and screening, wherein the aperture of a screen is 30-50nm for later use;
s32, conveying the screened qualified raw materials to the next forging process through automatic blanking equipment;
s33, putting the quartz sand, the metallurgical coke particles, the calcium oxide, the ferric oxide and the copper powder in the step S1 into a ball mill for grinding, and screening the ground particles to obtain a required mixture I for later use;
s4, carrying out high-temperature calcination treatment on graphite coke, needle coke, anthracite, natural graphite and graphite fragments in the solid carbonaceous raw material at the temperature of 1200-1500 ℃ under the condition of air isolation;
s41, after the calcination is finished, standing for 60-72h for natural cooling;
s5, fully mixing the needle coke, the pitch coke, the metallurgical coke and the anthracite which are crushed in the step S3 to prepare a required mixture II, and adding the mixture I and the mixture II which are prepared in the step S3 and the soaked graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, into a kneading pot for mixing treatment for later use;
s51, mixing and stirring the raw materials in the step S5, adding the melted bonding asphalt and the melted synthetic resin by using a feeding mechanism, and heating and uniformly stirring to obtain a paste;
s52, putting the paste into a press to prepare a raw product, and roasting the raw product for the first time, impregnating and roasting for the second time to obtain a roasted product;
s6, loading the roasted product into an inner-series graphitizing furnace for graphitizing treatment to obtain a graphitized product;
s7, processing the graphitized product into finished products of different specifications according to technical requirements to obtain a high-strength graphite electrode, wherein after the outer surface of the high-strength graphite electrode is roughly processed, a layer of thin white paint can be sprayed on the surface of a scribing line, and then the scribing line is carried out, so that the line is clear and the mechanical processing is convenient;
and S8, packaging and warehousing the graphite electrode prepared in the step S8 by using a vacuum bag.
Example 4:
s1, preparing raw materials, namely weighing 34 parts of graphite coke, 24 parts of needle coke, 14 parts of pitch coke, 21 parts of metallurgical coke, 10 parts of anthracite, 54 parts of natural graphite and crushed graphite, 24 parts of bonding asphalt and synthetic resin, 3 parts of calcium oxide, 8 parts of copper powder, 0.7 part of ferric oxide, 7 parts of quartz sand and 10 parts of metallurgical coke particles:
s2, preparing an impregnant, namely anthracene oil;
s21, putting the graphite materials, namely graphite coke, natural graphite and graphite fragments in the raw materials into anthracene oil to be soaked for 8-10 hours;
s23, after soaking, fishing out the graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, and draining for preparation
S31, respectively crushing the graphite coke, the needle coke, the asphalt coke, the metallurgical coke, the anthracite, the natural graphite and the graphite fragments in the step S1, and screening the crushed graphite with the aperture of 30-50nm for later use;
s32, conveying the screened qualified raw materials to the next forging process through automatic blanking equipment;
s33, putting the quartz sand, the metallurgical coke particles, the calcium oxide, the ferric oxide and the copper powder in the step S1 into a ball mill for grinding, and screening the ground particles to obtain a required mixture I for later use;
s4, carrying out high-temperature calcination treatment on graphite coke, needle coke, anthracite, natural graphite and graphite fragments in the solid carbonaceous raw material at the temperature of 1200-1500 ℃ under the condition of air isolation;
s41, after the calcination is finished, standing for 60-72h for natural cooling;
s5, fully mixing the needle coke, the pitch coke, the metallurgical coke and the anthracite which are crushed in the step S3 to prepare a required mixture II, and adding the mixture I and the mixture II which are prepared in the step S3 and the soaked graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, into a kneading pot for mixing treatment for later use;
s51, mixing and stirring the raw materials in the step S5, adding the melted bonding asphalt and the melted synthetic resin by using a feeding mechanism, and heating and stirring uniformly to obtain paste;
s52, putting the paste into a press to prepare a raw product, and roasting the raw product for the first time, impregnating and roasting for the second time to obtain a roasted product;
s6, loading the roasted product into an inner-series graphitization furnace for graphitization treatment to obtain a graphitized product;
s7, processing the graphitized product into finished products of different specifications according to technical requirements to obtain a high-strength graphite electrode, wherein after the rough machining of the outer surface of the high-strength graphite electrode, a layer of thin white paint can be sprayed on the surface of a scribing line, then the scribing line is carried out, and then the high-strength graphite electrode can be placed on a CNC (computer numerical control) machine to be cut and machined to form a proper size or shape;
and S8, packaging and warehousing the graphite electrode prepared in the step S8 by using a vacuum bag.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used in the indicated orientations and positional relationships to indicate orientations and positional relationships, and are used merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. The preparation method of the graphite electrode is characterized in that the preparation material components of the graphite electrode are as follows: comprises solid carbon and a binder, wherein the solid carbon comprises graphite coke, needle coke, pitch coke, metallurgical coke, anthracite, natural graphite and crushed graphite; the adhesive comprises bonding asphalt and synthetic resin, and auxiliary materials comprising quartz sand, metallurgical coke particles, calcium oxide, ferric oxide and copper powder are also used in the production and processing process;
meanwhile, an impregnant is prepared, and the impregnant comprises anthracene oil.
2. The method for preparing a graphite electrode according to claim 1, wherein: the composite material comprises the following components in parts by weight: 30-35 parts of graphite coke, 20-25 parts of needle coke, 10-15 parts of asphalt coke, 18-22 parts of metallurgical coke, 10 parts of anthracite, 50-55 parts of natural graphite and crushed graphite, 20-25 parts of bonding asphalt and synthetic resin, 1-3 parts of calcium oxide, 5-8 parts of copper powder, 0.5-0.7 part of ferric oxide, 5-7 parts of quartz sand and 10 parts of metallurgical coke particles.
3. The method for preparing a graphite electrode according to claim 1, wherein: the processing technology comprises the following steps:
s1, preparing raw materials, weighing the raw materials in parts by weight according to claim 2:
s2, preparing an impregnant, namely anthracene oil;
s21, putting the graphite materials, namely graphite coke, natural graphite and graphite fragments in the raw materials into anthracene oil to be soaked for 8-10 hours;
s23, after soaking, fishing out the graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, and draining for preparation
S31, respectively crushing the graphite coke, the needle coke, the asphalt coke, the metallurgical coke, the anthracite, the natural graphite and the crushed graphite in the step S1, and screening for later use;
s32, conveying the screened qualified raw materials to the next forging process through automatic blanking equipment;
s33, putting the quartz sand, the metallurgical coke particles, the calcium oxide, the ferric oxide and the copper powder in the step S1 into a ball mill for grinding, and screening the ground particles to obtain a required mixture I for later use;
s4, carrying out high-temperature calcination treatment on graphite coke, needle coke, anthracite, natural graphite and graphite fragments in the solid carbonaceous raw material at the temperature of 1200-1500 ℃ under the condition of air isolation;
s41, after the calcination is finished, standing for 60-72h for natural cooling;
s5, fully mixing the needle coke, the pitch coke, the metallurgical coke and the anthracite which are crushed in the step S3 to prepare a required mixture II, and adding the mixture I and the mixture II which are prepared in the step S3 and the soaked graphite materials, namely the graphite coke, the natural graphite and the crushed graphite, into a kneading pot for mixing treatment for later use;
s51, mixing and stirring the raw materials in the step S5, adding the melted bonding asphalt and the melted synthetic resin by using a feeding mechanism, and heating and stirring uniformly to obtain paste;
s52, putting the paste into a press to prepare a raw product, and roasting the raw product for the first time, impregnating and roasting for the second time to obtain a roasted product;
s6, loading the roasted product into an inner-series graphitizing furnace for graphitizing treatment to obtain a graphitized product;
s7, processing the graphitized product into finished products with different specifications according to technical requirements to obtain the high-strength graphite electrode;
and S8, packaging and warehousing the graphite electrode prepared in the step S8 by using a vacuum bag.
4. The method for preparing a graphite electrode according to claim 1, wherein: the material comprises the following components in parts by weight: 30 parts of graphite coke, 20 parts of needle coke, 10 parts of asphalt coke, 18 parts of metallurgical coke, 10 parts of anthracite, 50 parts of natural graphite and graphite fragments, 20 parts of bonding asphalt and synthetic resin, 1 part of calcium oxide, 5 parts of copper powder, 0.5 part of ferric oxide, 5 parts of quartz sand and 10 parts of metallurgical coke particles.
5. The method for preparing a graphite electrode according to claim 1, wherein: the composite material comprises the following components in parts by weight: 33 parts of graphite coke, 23 parts of needle coke, 13 parts of asphalt coke, 20 parts of metallurgical coke, 10 parts of anthracite, 53 parts of natural graphite and crushed graphite, 23 parts of bonding asphalt and synthetic resin, 2 parts of calcium oxide, 6 parts of copper powder, 0.6 part of iron sesquioxide, 6 parts of quartz sand and 10 parts of metallurgical coke particles.
6. The method for preparing a graphite electrode according to claim 1, wherein: the material comprises the following components in parts by weight: 35 parts of graphite coke, 25 parts of needle coke, 15 parts of asphalt coke, 22 parts of metallurgical coke, 10 parts of anthracite, 55 parts of natural graphite and crushed graphite, 25 parts of bonding asphalt and synthetic resin, 3 parts of calcium oxide, 8 parts of copper powder, 0.7 part of iron sesquioxide, 5-7 parts of quartz sand and 10 parts of metallurgical coke particles.
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