CN108340471B - processing method and processing device for cylindrical graphite - Google Patents
processing method and processing device for cylindrical graphite Download PDFInfo
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- CN108340471B CN108340471B CN201810144701.0A CN201810144701A CN108340471B CN 108340471 B CN108340471 B CN 108340471B CN 201810144701 A CN201810144701 A CN 201810144701A CN 108340471 B CN108340471 B CN 108340471B
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- female die
- graphite
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 55
- 239000010439 graphite Substances 0.000 title claims abstract description 55
- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 16
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 13
- 239000003830 anthracite Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 239000011331 needle coke Substances 0.000 claims description 12
- 238000004898 kneading Methods 0.000 claims description 10
- 229910021382 natural graphite Inorganic materials 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000005087 graphitization Methods 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 6
- 239000011280 coal tar Substances 0.000 claims description 6
- 239000011294 coal tar pitch Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
- 239000011295 pitch Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012856 weighed raw material Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims 1
- 239000010426 asphalt Substances 0.000 description 9
- 239000000571 coke Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 238000011049 filling Methods 0.000 description 6
- 239000002006 petroleum coke Substances 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 239000006004 Quartz sand Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000011300 coal pitch Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011334 petroleum pitch coke Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- 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
- C04B35/522—Graphite
-
- 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
- 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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- 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
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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
- C04B35/622—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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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/327—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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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/424—Carbon black
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6022—Injection moulding
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- C—CHEMISTRY; METALLURGY
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a processing method and a processing device of cylindrical graphite, belongs to the technical field of graphite electrodes, and aims to solve the problems that the traditional graphite electrode is poor in conductivity, and a profiling mold is not suitable for production of a novel graphite electrode. The base is fixed on an operating table of a press machine, a female die fixing seat is fixedly installed on the base, a female die is embedded in the upper end face of the female die fixing seat, the female die fixing seat is connected with the female die through a screw, the female die is in an inverted frustum shape, a through hole is formed in the center of the female die, a female die sleeve is installed in the through hole, a second through hole is formed in the bottom end of the female die sleeve, an annular resistance wire is arranged in the female die body, and the annular resistance wire is encircled on the inner wall of; the connecting plate is installed on the output end of the press machine and located above the female die, the male die assembly is installed on the lower end face of the connecting plate, and the male die assembly and the female die are arranged oppositely. The processing method and the processing device of the cylindrical graphite can reduce the production cost of the graphite electrode and improve the conductivity of the electrode.
Description
Technical Field
the invention relates to a processing device, in particular to a processing method and a processing device of cylindrical graphite, and belongs to the technical field of graphite electrodes.
background
The graphite electrode is a high-temperature resistant graphite conductive material prepared by using petroleum coke and pitch coke as aggregates and coal pitch as an adhesive through the steps of raw material calcination, crushing and grinding, batching, kneading, molding, roasting, dipping, graphitization and machining, and is called an artificial graphite electrode (graphite electrode for short) and is different from a natural graphite electrode prepared by using natural graphite as a raw material.
The graphite electrode is mainly prepared by using petroleum coke and needle coke as raw materials and coal pitch as a binding agent through calcining, proportioning, kneading, profiling, roasting, graphitizing and machining, and is a conductor for heating and melting furnace burden by releasing electric energy in an electric arc mode in an electric arc furnace.
The main raw material for producing the graphite electrode is petroleum coke, a small amount of asphalt coke can be added into the common power graphite electrode, and the sulfur content of the petroleum coke and the sulfur content of the asphalt coke cannot exceed 0.5 percent. Needle coke is also required to be added when producing high-power or ultra-high-power graphite electrodes. The main raw material for producing the anode for aluminum is petroleum coke, the sulfur content is controlled to be not more than 1.5-2%, and the petroleum coke and the asphalt coke meet the national relevant quality standards.
Graphite electrodes are not designed as conventional copper electrodes. Many die factories usually have different reserves in the aspects of rough machining and finish machining of copper electrodes, and graphite electrodes use almost the same reserve, so that the times of CAD/CAM and machining are reduced, and the precision of a die cavity is improved to a great extent only for the reason, the traditional graphite profiling die can only produce pure cylindrical common graphite electrodes, and the graphite electrodes with special structures cannot be produced.
Disclosure of Invention
the invention aims to provide a processing method and a processing device of cylindrical graphite, which aim to solve the technical problems.
A processing device of cylindrical graphite comprises a base, a female die fixing seat, a female die sleeve, a connecting plate, a male die assembly, an ejection mechanism and an annular resistance wire,
The ejection mechanism comprises a pull rod, a slide block, a slideway, a limiting block, a supporting plate and an ejector rod,
The male die component comprises a male die fixing seat, a male die, a raised head, a first mounting groove, a first through hole, a support rod, a clamping head and a compression spring;
The base is fixed on an operating table of a press machine, a female die fixing seat is fixedly installed on the base, a female die is embedded in the upper end face of the female die fixing seat, the female die fixing seat is connected with the female die through a screw, the female die is in an inverted frustum shape, a through hole is formed in the center of the female die, a female die sleeve is installed in the through hole, a second through hole is formed in the bottom end of the female die sleeve, an annular resistance wire is arranged in the female die body, and the annular resistance wire is encircled on the inner wall of; the connecting plate is installed on the output end of the press and located above the female die, a male die assembly is installed on the lower end face of the connecting plate, the male die assembly and the female die are arranged oppositely, at least two pull rods are further installed on the lower end face of the connecting plate and located on two sides of the male die assembly, the lower ends of the pull rods are connected with the slide ways through sliding blocks, limiting blocks are arranged at the upper ends of the slide ways, the lower ends of the slide ways are connected with the supporting plate, an ejector rod is installed in the center of the upper end face of the supporting plate, a second installation groove is formed in the center of the upper end face of the ejector rod, and the top end of;
The male die fixing seat is fixedly installed on the lower end face of the connecting plate, a male die is installed at the lower end of the male die fixing seat, a raised head is arranged at the center of the lower end face of the male die and corresponds to a through hole in the female die, a first installation groove is formed in the raised head, a first through hole is formed in the bottom end of the first installation groove, a second installation groove is formed in the male die fixing seat opposite to the first installation groove, a support rod is hinged in the first installation groove, the support rod is symmetrically arranged, the upper end of the support rod is connected through a compression spring.
Preferably: the base is fixed on the press machine operating platform through a pressing plate and a bolt which are arranged on the press machine operating platform.
Preferably: the lower end of the slideway is connected with the supporting plate through a pin shaft, and a clamp spring is arranged on the pin shaft.
A processing method of a cylindrical graphite processing device comprises the following steps:
the method comprises the following steps: preparing a graphite core; mixing natural graphite powder and needle coke powder, adding coal tar pitch and ferric oxide powder, heating and fully mixing;
Step two: kneading the paste obtained in the first step, pressing the material into a cylinder by using a press machine, enabling the material to just pass through the second through hole and be placed in the second mounting groove, and enabling the top of the cylinder to be flush with the top end surface of the female die sleeve;
step three: weighing 80 parts of graphite powder, 15 parts of high-wear-resistance carbon black and 5 parts of coal tar low-temperature pitch according to the parts by weight, heating and fully mixing the weighed raw materials;
step four: putting the mixture obtained in the third step into a female die sleeve, and filling the mixture into the female die sleeve;
Step five: starting a press machine, and profiling the material in the female die sleeve by using the male die assembly;
step six: and D, cooling the cylindrical graphite with the graphite core obtained in the step five in cold water, and roasting and graphitizing the cooled cylindrical graphite with the graphite core to obtain a finished product.
preferably: in the first step, the weight ratio of the natural graphite powder, the needle coke powder, the coal tar pitch and the ferric oxide powder in the graphite core is 4:3:1.3: 0.16.
preferably: in the first step, the carbon content of the needle coke is more than 99.6 percent, and the granularity is 300-800 meshes.
preferably: graphitized anthracite and graphene powder can be added in the third step, and the weight percentage ratio is as follows: 8:1.5:5:5:5.
preferably: the graphitized anthracite is anthracite treated by high-temperature graphitization, the graphitized anthracite is powder below 1mm, and the powder preparation purity of particles below 0.075mm is not lower than 50%.
Compared with the existing product, the invention has the following effects:
The processing device can fix the graphite core of the graphite electrode through a second mounting groove on the upper end surface of the ejector rod, then add the outer layer graphite raw material, can carry out compression molding on the graphite raw material through the male die assembly, and can carry out shaping on the graphite electrode through the annular graphite resistor; during the drawing of patterns, branch, chuck and compression spring can play the effect of centre gripping, can carry the graphite core, press from both sides cylindrical graphite electrode and go out the die case, accomplish half drawing of patterns, if meet accident, cylindrical graphite electrode is not pressed from both sides out, so can be with the die case rather than the whole ejecting of cylindrical graphite electrode in, realize the full drawing of patterns.
The conductivity of the electrode prepared by the invention is far higher than that of a common graphite electrode, and the cost is low.
drawings
FIG. 1 is a schematic structural view of a cylindrical graphite processing apparatus according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural view of the male die assembly;
FIG. 4 is a schematic view of the structure of the base;
FIG. 5 is a schematic structural view of a female mold;
FIG. 6 is a schematic view of the structure of the male mold;
FIG. 7 is an enlarged view B of FIG. 1;
fig. 8 is a schematic view of the structure of the cavity die case.
in the figure: 1-base, 2-die fixing base, 3-die, 4-die sleeve, 401-second through hole, 5-connecting plate, 6-punch component, 601-punch fixing base, 602-punch, 603-raised head, 604-first mounting groove, 605-first through hole, 606-supporting rod, 607-clamping head, 608-compression spring, 7-pressing plate, 8-bolt, 9-annular resistance wire, 901-pull rod, 902-sliding block, 903-slideway, 904-limiting block, 905-supporting plate, 906-pin shaft, 907-ejector rod, 909-snap spring and 910-second mounting groove.
Detailed Description
preferred embodiments of the present invention are explained in detail below with reference to the accompanying drawings.
In the specific embodiment 1, as shown in fig. 1, the processing device of cylindrical graphite according to the present invention comprises a base 1, a female die fixing seat 2, a female die 3, a female die sleeve 4, a connecting plate 5, a male die assembly 6, an ejection mechanism and an annular resistance wire 9,
the ejection mechanism comprises a pull rod 901, a slide block 902, a slide way 903, a limit block 904, a supporting plate 905 and a top rod 907,
The male die component 6 comprises a male die fixing seat 601, a male die 602, a nose 603, a first mounting groove 604, a first through hole 605, a support rod 606, a clamping head 607 and a compression spring 608;
the base 1 is fixed on an operation table of a press machine, a female die fixing seat 2 is fixedly installed on the base 1, a female die 3 is embedded on the upper end face of the female die fixing seat 2, the female die fixing seat 2 is connected with the female die 3 through a screw rod, the female die 3 is in an inverted frustum shape, a through hole is formed in the center of the female die 3, a female die sleeve 4 is installed in the through hole, a second through hole 401 is formed in the bottom end of the female die sleeve 4, an annular resistance wire 9 is arranged in the body of the female die 3, and the annular resistance wire 9 is; the connecting plate 5 is arranged at the output end of the press and positioned above the female die 3, a male die assembly 6 is arranged on the lower end face of the connecting plate 5, the male die assembly 6 is arranged opposite to the female die 3, at least two pull rods 901 are also arranged on the lower end face of the connecting plate 5, the pull rods 901 are positioned at two sides of the male die assembly 6, the lower ends of the pull rods 901 are connected with a slide way 903 through a slide block 902, a limit block 904 is arranged at the upper end of the slide way 903, the lower end of the slide way 903 is connected with a supporting plate 905, a push rod 907 is arranged at the center of the upper end face of the supporting plate 905, a second mounting groove 910 is arranged at the center of the upper end face of the push rod 907, and the top;
The male die fixing seat 601 is fixedly installed on the lower end face of the connecting plate 5, a male die 602 is installed at the lower end of the male die fixing seat 601, a raised head 603 is arranged at the center of the lower end face of the male die 602, the raised head 603 corresponds to a through hole in the female die 3, a first installation groove 604 is formed in the raised head 603, a first through hole 605 is formed in the bottom end of the first installation groove 604, a second installation groove is formed in the male die fixing seat 601 opposite to the first installation groove 604, a supporting rod 606 is hinged in the first installation groove 604, the supporting rods 606 are symmetrically arranged, the upper ends of the supporting rods are connected through a compression spring 608.
Embodiment 2, as shown in fig. 2, the present embodiment is different from embodiment 1 in that a base 1 is fixed to a press table by a pressing plate 7 and bolts 8 mounted on the press table.
Embodiment mode 3: as shown in fig. 1 and fig. 2, the present embodiment is different from embodiments 1 and 2 in that the lower end of the slide 903 is connected to a support plate 905 by a pin 906, and a clamp spring 909 is mounted on the pin 906.
The processing method of the cylindrical graphite processing device is characterized by comprising the following steps of:
The method comprises the following steps: preparing a graphite core; mixing natural graphite powder and needle coke powder, adding coal tar pitch and ferric oxide powder, heating and fully mixing;
Step two: kneading the paste obtained in the first step, pressing the material into a cylinder by using a press machine, enabling the material to just pass through the second through hole 401 and be placed in the second mounting groove 910, and enabling the top of the cylinder to be flush with the top end surface of the female die sleeve 4;
step three: weighing 80 parts of graphite powder, 15 parts of high-wear-resistance carbon black and 5 parts of coal tar low-temperature pitch according to the parts by weight, heating and fully mixing the weighed raw materials;
Step four: putting the mixture obtained in the third step into a female die sleeve 4, and filling the mixture into the female die sleeve 4;
Step five: starting a press machine, and profiling the material in the female die sleeve 4 by using the male die assembly 6;
Step six: and D, cooling the cylindrical graphite with the graphite core obtained in the step five in cold water, and roasting and graphitizing the cooled cylindrical graphite with the graphite core to obtain a finished product.
Preferably: in the first step, the weight ratio of the natural graphite powder, the needle coke powder, the coal tar pitch and the ferric oxide powder in the graphite core is 4:3:1.3: 0.16.
preferably: in the first step, the carbon content of the needle coke is more than 99.6 percent, and the granularity is 300-800 meshes.
preferably: graphitized anthracite and graphene powder can be added in the third step, and the weight percentage ratio is as follows: 8:1.5:5:5:5.
Preferably: the graphitized anthracite is anthracite treated by high-temperature graphitization, the graphitized anthracite is powder below 1mm, and the powder preparation purity of particles below 0.075mm is not lower than 50%.
Embodiment mode 3: adding 8 parts of natural graphite powder, 6 parts of needle coke powder, 2.6 parts of modified asphalt powder and 0.32 part of ferric oxide powder into a kneading pot in sequence, mixing for 2-5 hours at a temperature of more than 200 ℃, adding a paste material into the outer layer of a mould, prepressing and pressurizing, pressing the paste material into a cylindrical graphite core, putting an electrode blank of the electrode into cooling water, cooling to room temperature, putting the electrode blank into a second mounting groove 910 for standby, adding 8 parts of stone ink powder, 1.5 parts of high-wear-resistant carbon black and 5 parts of coal tar low-temperature asphalt into the kneading pot in sequence, mixing for 2-5 hours at a temperature of more than 200 ℃, adding the electrode blank into the outer layer of the mould, prepressing and pressurizing, filling the paste material into a concave mould sleeve 4, filling the concave mould sleeve 4 with the paste material, starting a press machine, pressurizing and heating the paste material in the concave mould sleeve 4, keeping the three pressures consistent, taking out the secondarily extruded electrode blank by using a convex mould assembly 6, placing the electrode into cooling water to be cooled to room temperature, then roasting and graphitizing, wherein 8cm gaps are formed between every two electrodes, the gaps are filled and covered by metallurgical coke and quartz sand, then, the temperature is gradually raised according to the existing temperature rise curve, the temperature is gradually lowered after being raised to 1350 ℃, the roasting time reaches 200 hours, the flameout is gradually carried out, the metallurgical coke and the quartz sand are removed, the electrode is cooled to the room temperature, a layer of kaolin is coated on the surface of the electrode, then, the electrode is placed into impregnated asphalt with the temperature of more than 220 ℃ for impregnation for 30 minutes, the electrode is sent into a graphitization furnace, the temperature is gradually raised to 1350 ℃ according to the temperature curve for carbonization, the temperature is raised to 2900 ℃ for graphitization, then, the temperature is gradually lowered to the room temperature, and then, the: the resistivity is 3.3 multiplied by 10 < -3 > omega.m, the breaking strength is 13.0MPa, the ash content is 0.101 percent, the mass density is 1600kg/m3, the elastic modulus is 12.42GPa, all indexes reach the grade of a high-power graphite electrode, the electrode quality is ensured, and the material consumption of a solid single-layer high-power graphite electrode is relatively reduced.
Embodiment 4: adding 8 parts of natural graphite powder, 6 parts of needle coke powder, 2.6 parts of modified asphalt powder and 0.32 part of ferric oxide powder into a kneading pot in sequence, mixing for 2-5 hours at a temperature of more than 200 ℃, adding a paste material into an outer layer of a mould, prepressing and pressurizing, pressing the paste material into a cylindrical graphite core, putting an electrode blank of the electrode into cooling water, cooling to room temperature, putting the electrode blank into a second mounting groove 910 for standby, then taking 8 parts of stone ink powder, 1.5 parts of high wear-resistant carbon black, 5 parts of coal tar low-temperature asphalt, 5 parts of graphitized anthracite and 5 parts of graphene powder, adding the electrode blank into the kneading pot in sequence, mixing for 2-5 hours at a temperature of more than 200 ℃, adding the paste material into the outer layer of the mould, prepressing and pressurizing, filling the paste material into a concave mould sleeve 4, filling the concave mould sleeve 4, starting a press machine, pressurizing and heating the paste material in the concave mould sleeve 4, keeping the three times of pressure consistent, then taking out the secondarily extruded electrode blank by using the male die assembly 6, putting the electrode blank into cooling water to be cooled to room temperature, then roasting and graphitizing, wherein a gap of 10cm is reserved between every two electrodes, the gap is filled and covered by metallurgical coke and quartz sand, then, the temperature is gradually increased according to the existing temperature increase curve, the temperature is gradually reduced when the temperature is increased to 1300 ℃, the roasting time reaches 230 hours, the electrode is gradually extinguished, the metallurgical coke and the quartz sand are removed, the electrode is cooled to room temperature, a layer of kaolin is coated on the surface of the electrode, then, the electrode is put into impregnated asphalt with the temperature of more than 210 ℃ for soaking for 50 minutes, the electrode is sent into a graphitizing furnace, the temperature is gradually increased to 1300 ℃ according to the temperature curve for carbonization, then, the temperature is increased to 2800 ℃ for graphitization, then, the electrode is gradually cooled to room: the resistivity is 3.1 multiplied by 10 < -3 > omega.m, the flexural strength is 15.3MPa, the ash content is 0.13 percent, the mass density is 1701kg/m3, the elastic modulus is 13.8GPa, all indexes reach the grade of a high-power graphite electrode, the electrode quality is ensured, and the material consumption of a solid single-layer high-power graphite electrode is relatively reduced.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (8)
1. the utility model provides a processingequipment of cylindrical graphite which characterized in that: comprises a base (1), a female die fixing seat (2), a female die (3), a female die sleeve (4), a connecting plate (5), a male die component (6), an ejection mechanism and an annular resistance wire (9),
the ejection mechanism comprises a pull rod (901), a slide block (902), a slide way (903), a limit block (904), a supporting plate (905) and a push rod (907),
The male die component (6) comprises a male die fixing seat (601), a male die (602), a raised head (603), a first mounting groove (604), a first through hole (605), a support rod (606), a clamping head (607) and a compression spring (608);
the die pressing machine is characterized in that the base (1) is fixed on an operating table of a pressing machine, a female die fixing seat (2) is fixedly installed on the base (1), a female die (3) is embedded in the upper end face of the female die fixing seat (2), the female die fixing seat (2) is connected with the female die (3) through a screw rod, the female die (3) is in an inverted frustum shape, a through hole is formed in the center of the female die (3), a female die sleeve (4) is installed in the through hole, a second through hole (401) is formed in the bottom end of the female die sleeve (4), an annular resistance wire (9) is arranged in the body of the female die (3), and; the connecting plate (5) is arranged at the output end of the press machine and positioned above the female die (3), a male die assembly (6) is arranged on the lower end face of the connecting plate (5), the male die assembly (6) is arranged opposite to the female die (3), at least two pull rods (901) are further arranged on the lower end face of the connecting plate (5), the pull rods (901) are positioned at two sides of the male die assembly (6), the lower ends of the pull rods (901) are connected with a slide way (903) through a sliding block (902), a limiting block (904) is arranged at the upper end of the slide way (903), the lower end of the slide way (903) is connected with a supporting plate (905), a mandril (907) is arranged at the center of the upper end face, a second mounting groove (910) is formed in the center of the upper end face of the ejector rod (907), and the top end of the ejector rod (907) penetrates through the base (1) and the female die fixing seat (2) in sequence and abuts against the lower end face of the female die sleeve (4);
The punch fixing seat (601) is fixedly installed on the lower end face of the connecting plate (5), a punch (602) is installed at the lower end of the punch fixing seat (601), a raised head (603) is arranged at the center of the lower end face of the punch (602), the raised head (603) corresponds to a through hole in the die (3), a first installation groove (604) is formed in the raised head (603), a first through hole (605) is formed in the bottom end of the first installation groove (604), a second installation groove is formed in the punch fixing seat (601) opposite to the first installation groove (604), supporting rods (606) are hinged in the first installation groove (604), the supporting rods (606) are symmetrically arranged, the upper ends of the supporting rods are connected through compression springs (608), and clamping heads (607) are arranged at the lower ends of the supporting.
2. The apparatus for processing cylindrical graphite according to claim 1, wherein: the base (1) is fixed on the press machine operating platform through a pressure plate (7) and a bolt (8) which are installed on the press machine operating platform.
3. The apparatus for processing cylindrical graphite according to claim 1, wherein: the lower end of the slide way (903) is connected with the supporting plate (905) through a pin shaft (906), and a clamp spring (909) is installed on the pin shaft (906).
4. The processing method of the cylindrical graphite processing device according to claim 1, comprising the steps of:
the method comprises the following steps: preparing a graphite core; mixing natural graphite powder and needle coke powder, adding coal tar pitch and ferric oxide powder, heating and fully mixing;
step two: kneading the paste obtained in the first step, pressing the material into a cylinder by a press machine, enabling the material to just pass through the second through hole (401) and be placed in the second mounting groove (910), and enabling the top of the cylinder to be flush with the top end face of the die case (4);
step three: weighing 8 parts of graphite powder, 1.5 parts of high-wear-resistance carbon black and 5 parts of coal tar low-temperature pitch according to the parts by weight, heating and fully mixing the weighed raw materials;
step four: putting the mixture obtained in the third step into a female die sleeve (4) to enable the mixture to be filled in the female die sleeve (4);
step five: starting a press machine, and profiling the material in the female die sleeve (4) by using the male die component (6);
Step six: and D, cooling the cylindrical graphite with the graphite core obtained in the step five in cold water, and roasting and graphitizing the cooled cylindrical graphite with the graphite core to obtain a finished product.
5. The processing method of the cylindrical graphite processing device according to claim 4, wherein: in the first step, the weight ratio of the natural graphite powder, the needle coke powder, the coal tar pitch and the ferric oxide powder in the graphite core is 4:3:1.3: 0.16.
6. the processing method of the cylindrical graphite processing device according to claim 4, wherein: in the first step, the carbon content of the needle-shaped coke powder is more than 99.6%, and the granularity is 300-800 meshes.
7. The processing method of the cylindrical graphite processing device according to claim 4, wherein: graphitized anthracite and graphene powder can be added in the third step, 8 parts of graphite powder, 1.5 parts of high-wear-resistance carbon black, 5 parts of coal tar low-temperature pitch, 5 parts of graphitized anthracite and 5 parts of graphene powder are taken and added into the kneading pot in sequence, and the weight fraction ratio is as follows: 8:1.5:5:5:5.
8. The processing method of the cylindrical graphite processing apparatus according to claim 7, wherein: the graphitized anthracite is subjected to high-temperature graphitization treatment, the graphitized anthracite is powder below 1mm, and the powder preparation purity of particles below 0.075mm is not lower than 50%.
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| JP3433683B2 (en) * | 1998-10-28 | 2003-08-04 | トヨタ自動車株式会社 | Powder mold and powder molding method |
| DE10211604C1 (en) * | 2002-03-11 | 2003-07-17 | Fritsch Sondermaschinen Gmbh D | Production of a diamond-like tool segment comprises inserting a green body axially into an open side of a recess of a die heated to the sintering temperature, and impinging the green body with a sintering pressure |
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| CN203141625U (en) * | 2013-01-15 | 2013-08-21 | 安徽宏晶新材料股份有限公司 | Graphite column pressing device |
| CN104860678A (en) * | 2015-04-29 | 2015-08-26 | 萝北奥星新材料有限公司 | Method for producing ultra-high power graphite electrode through natural graphite |
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