WO2011098486A1 - Verfahren zur herstellung eines formteils aus einem kohlenstoffwerkstoff unter verwendung von wiederverwerteten carbonfasern - Google Patents
Verfahren zur herstellung eines formteils aus einem kohlenstoffwerkstoff unter verwendung von wiederverwerteten carbonfasern Download PDFInfo
- Publication number
- WO2011098486A1 WO2011098486A1 PCT/EP2011/051893 EP2011051893W WO2011098486A1 WO 2011098486 A1 WO2011098486 A1 WO 2011098486A1 EP 2011051893 W EP2011051893 W EP 2011051893W WO 2011098486 A1 WO2011098486 A1 WO 2011098486A1
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- WO
- WIPO (PCT)
- Prior art keywords
- carbon
- mixture
- optionally
- fibers
- carbon fiber
- Prior art date
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 80
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 77
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000000203 mixture Substances 0.000 claims abstract description 47
- 239000002699 waste material Substances 0.000 claims abstract description 41
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 239000000571 coke Substances 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 238000010000 carbonizing Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 89
- 239000011159 matrix material Substances 0.000 claims description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 18
- 230000001590 oxidative effect Effects 0.000 claims description 15
- 239000011295 pitch Substances 0.000 claims description 14
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 238000011282 treatment Methods 0.000 claims description 12
- 238000005087 graphitization Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 239000011208 reinforced composite material Substances 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 3
- 239000011331 needle coke Substances 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 2
- 239000007849 furan resin Substances 0.000 claims description 2
- 239000002006 petroleum coke Substances 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 239000006253 pitch coke Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 18
- 239000003733 fiber-reinforced composite Substances 0.000 abstract description 7
- 229920002994 synthetic fiber Polymers 0.000 abstract 1
- 239000010439 graphite Substances 0.000 description 35
- 229910002804 graphite Inorganic materials 0.000 description 35
- 239000000047 product Substances 0.000 description 24
- 238000003763 carbonization Methods 0.000 description 9
- 238000005470 impregnation Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012778 molding material Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000011210 fiber-reinforced concrete Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical class [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910001963 alkali metal nitrate Inorganic materials 0.000 description 1
- -1 alkali metal salts Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Chemical class [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-N bromic acid Chemical compound OBr(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-N 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-N iodic acid Chemical class OI(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000004634 thermosetting polymer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
-
- 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
-
- 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
-
- 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
-
- 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
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/06—Electrodes
- H05B7/08—Electrodes non-consumable
- H05B7/085—Electrodes non-consumable mainly consisting of carbon
-
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/526—Fibers characterised by the length of the fibers
-
- 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
- C04B2235/60—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
- C04B2235/6021—Extrusion moulding
-
- 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
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/616—Liquid infiltration of green bodies or pre-forms
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/94—Products characterised by their shape
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/95—Products characterised by their size, e.g. microceramics
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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
- C04B2235/70—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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Definitions
- Connects based on graphite which are also referred to as graphite nipples and are used for the front-side joining of graphite electrodes to form electrode strands.
- These connecting pieces are usually double-frustoconical or in the form of a biconical or cylindrical and have an external thread, via which they are screwed into provided on the front sides of the graphite electrodes threaded boxes with complementary internal thread to connect two electrodes via their front sides together.
- the electrode string is mechanically, thermally and electrically stressed.
- carbon fibers are produced, for example, by initially spun fibers from carbonaceous starting materials, for example polyacrylonitrile, which are subsequently carbonized under drawing and possibly graphitized, before the fibers thus produced are finally surface-treated and optionally coated with sizing.
- carbonaceous starting materials for example polyacrylonitrile
- the properties of the final product are desired to be determined primarily by the properties of the carbon or graphite matrix.
- the fibers are firmly bonded to the matrix material, since otherwise the performance properties of the graphite electrodes and graphite connectors are impaired.
- connecting pieces for electrodes are known, which are composed of 0.2 to 10 wt .-% carbon fibers containing graphite, wherein the surfaces of the carbon fibers are oxidatively activated and the carbon fibers also have a carbonized coating.
- carbon fibers are first activated on their surface by oxidation and then coated with a preferably selected from wax, pitch, natural resins or thermoplastic or thermosetting polymers coating agent before the resulting fibers are mixed with coke, pitch and possibly additives and the so formed mixture to a green body, which is then carbonated and finally graphitized.
- the object of the present invention is therefore to provide a process for producing a molded part from carbon containing less than 20% by weight of carbon fibers, in particular graphite, which is simple and, in particular, economical to carry out and with which in particular graphite electrodes and graphite connecting pieces having excellent properties are produced can.
- step b) producing a mixture of the comminuted product obtained in step a), a binder, a carbon material and optionally one or more additives, the mixture containing less than 20% by weight of fibers,
- the process according to the invention is not only a process for producing a carbon fiber shaped article in an amount of carbon containing less than 20% by weight, but more particularly a process for recycling waste parts or rejects from one Carbon fiber reinforced composite material.
- the carbon material used in process step b) of the process according to the invention is understood to mean any material containing high amounts of carbon, in particular a material which is at least 70% by weight, particularly preferably at least 80% Wt .-% and most preferably at least 90 wt .-% consists of carbon.
- a preferred example of such a carbon material is coke.
- waste parts or reject parts made of any carbon fiber-reinforced composite material, ie a material in which carbon fibers are embedded in a matrix, can be used.
- a material in which carbon fibers are embedded in a matrix can be used.
- Good results are obtained in particular if in the process step a) waste parts or rejects are used, which consists of a carbon fiber reinforced plastic (CFRP), a carbon fiber reinforced carbon (CFC), a carbon fiber reinforced concrete or a mixture of two or more of composite materials mentioned above are composed.
- CFRP carbon fiber reinforced plastic
- CFC carbon fiber reinforced carbon
- CFRP carbon fiber reinforced concrete or a mixture of two or more of composite materials mentioned above are composed.
- suitable matrix materials for the CFRP are all types of thermoplastic or thermosetting synthetic resins, such as phenolic resin or epoxy resin.
- the carbon-fiber-reinforced composite material from which the waste parts or rejects used in method step a) are composed preferably contains at least 20% by volume of carbon fibers, particularly preferably 30 to 70% by volume of carbon fibers and very particularly preferably 40 to 60% by volume. % Carbon fibers.
- This embodiment is particularly preferred when the waste parts or reject parts used are composed of CFRP or CFC.
- waste parts or rejects are composed of carbon-fiber-reinforced concrete, the content of carbon fibers is typically less than 10% by volume.
- Waste parts or reject parts made from a carbon-fiber-reinforced composite material which contains short fibers and / or long fibers as carbon fibers can be used in process step a).
- the waste parts or reject parts made of the carbon fiber reinforced composite material in method step a) are preferably comminuted primarily into particles having a length of between 1 and 100 mm.
- the individual particles can have any desired geometry. For example, they may be in the form of leaflets with, for example, rectangular cross section or be cylindrical or fibrous.
- the comminuted product contains only comparatively small amounts of dust in addition to the comminuted particles.
- dust may be screened out of the product during or after comminution. Dust in this context particles or Particles having an average particle or particle size of less than 100 ⁇ understood.
- the comminution in the method step a) is carried out so that the product after crushing less than 5 wt .-% dust particles having an average particle size of less than 100 ⁇ contains, which can be achieved regularly only by sieving.
- the two components of the composite material from which the waste parts or reject parts are composed ie the matrix and the carbon fibers, are detached from one another during or after comminution.
- Loosening is understood to be a fiber-matrix release.
- the dissolution of the matrix from the carbon fibers can be effected by contacting the waste parts or rejects with an acid, for example with a mineral acid such as sulfuric acid or nitric acid, with an alkali, for example caustic soda, or with a solvent.
- an acid for example with a mineral acid such as sulfuric acid or nitric acid
- an alkali for example caustic soda
- the dissolution of the matrix from the carbon fibers may inevitably occur during comminution.
- the two components carbon fibers and matrix material
- the matrix material in process step a), during or preferably after the comminution of the waste parts or reject parts, the matrix material can be separated from the carbon fibers of the composite material, ie the matrix material can be removed from the carbon fibers, so that process step b) as product of process step a) only the carbon fibers are supplied.
- the separation of the matrix from the carbon fibers can be effected, for example, by screening or sifting, wherein the sifting is preferably carried out in a rotary sifter, air classifier or zigzag sifter. In principle, all compounds known to the person skilled in the art for this purpose can be used as binder in process step b).
- the binder is selected from the group consisting of phenolic resins, pitches, furan resins, phenyl esters and any mixtures of two or more of the aforementioned compounds, with particular preference being given to using pitch as the binder.
- coke as the carbon material in method step b), with pitch coke, metallurgical coke or petroleum coke, in particular needle coke, being particularly preferred.
- the coke used has a particle size of less than 30 mm, more preferably less than 15 mm and most preferably from 0.01 to 3 mm.
- pitch is used in the process step b) and coke as the carbon material.
- the mixing ratio between coke and binder is preferably adjusted to a value between 5: 1 to 2: 1, for example to about 4: 1.
- additives known to the person skilled in the art for this purpose may be added to this mixture, for example from 0.1 to 0.5% by weight of iron oxide.
- the (carbon) fiber content of the mixture in process step b) is set to less than 20% by weight, the (carbon) fiber content of the mixture preferably being less than 15% by weight, more preferably less than 10% by weight. %, more preferably less than 5% by weight and most preferably less than 3% by weight.
- the fiber content set in process step b) is less than or equal to the fiber content of the end product, since after step b) of the mixture no (Carbon) fibers are added more, but can lose the matrix components in the subsequent temperature treatments, such as carbonization and / or graphitization, tion to mass.
- the mixture prepared in process step b) is shaped by any process known to the person skilled in the art for this purpose, for example by extrusion, to give a shaped body having the desired geometry and desired dimensions.
- the carbonation is carried out in process step d) at a temperature between 600 and 1 .200 ° C.
- the carbonized molded article may optionally be graphitized, which is preferred. If such a graphitization is carried out, the shaped body between the process step d) and the graphitization is preferably impregnated with an impregnating agent, which is preferably impregnating pitch. In this case, a plurality of impregnation steps can be carried out, with one carbonization preferably being carried out in each case between two impregnation steps.
- the waste pieces or rejects shredded in method step a) in which optionally the carbon fibers have been dissolved from the matrix material as described above or the matrix material has been separated from the carbon fibers are fed before being fed into method step b) subjected to oxidative treatment to oxidize the fiber surface or fiber bundle surface.
- the oxidative treatment may include, for example, oxidation in an oxidant-containing aqueous bath, anodic oxidation in an electrolyte-containing aqueous bath, and / or oxidation in a gas stream containing an oxidant, for example, at 400 to 600 ° C.
- oxidizing agent it is possible to use all common oxidizing agents, such as (earth) alkali metal salts, such as (earth) alkali metal nitrates, sulfates, chlorates, bromates and iodates, or oxidizing acids, such as nitric acid, sulfuric acid, chloric acid, bromic acid or iodic.
- oxidizing agents such as (earth) alkali metal salts, such as (earth) alkali metal nitrates, sulfates, chlorates, bromates and iodates
- oxidizing acids such as nitric acid, sulfuric acid, chloric acid, bromic acid or iodic.
- the waste parts or rejects used in process step a) may be preferable to remove the waste parts or reject parts before carrying out process step a) or after comminuting in process step a). but to carbonize before process step b).
- This embodiment is particularly preferred if the waste parts or rejects used consist of CFRP in order to convert the matrix material of the composite into carbon.
- sizing is preferably applied to the comminuted, carbonized material or the recycled fibers.
- the method according to the invention comprises the following steps: a) crushing of carbon fiber reinforced carbon (CFC) waste products or rejects and optionally oxidation of the shredded product,
- CFC carbon fiber reinforced carbon
- step b) producing a mixture of the comminuted product, pitch, coke and optionally one or more additives obtained in step a), the mixture containing less than 20% by weight of fibers,
- step c) shaping the mixture obtained in step b) into a molded part, d) carbonizing the molded article obtained in step c),
- step d) optionally impregnating the molded article carbonated in step d) with an impregnating agent
- step f) optionally graphitizing the molded part carbonated in step d) or the molded part impregnated in step e).
- the waste parts or reject parts used in process step a) are preferably composed of carbon fiber reinforced composite material which contains at least 20% by volume of carbon fibers, more preferably 30 to 70% by volume of carbon fibers and most preferably 40 to 60% by volume of carbon fibers ,
- a fiber-matrix delamination can be carried out and the matrix material separated from the carbon fibers, so that only the carbon fibers are fed to process step b) as the product of process step a) , If an oxidative treatment of the product takes place, the optional separation is preferably carried out before the oxidative treatment.
- the method according to the invention comprises the following steps: a) comminution of waste parts or reject parts made of a carbon fiber reinforced plastic (CFRP) and optionally oxidation of the comminuted product,
- CFRP carbon fiber reinforced plastic
- step b) producing a mixture of the comminuted product obtained in step a), pitch, coke and optionally one or more additives, the mixture containing less than 20% by weight of fibers,
- step c) shaping the mixture obtained in step b) into a molded part, d) carbonizing the molded article obtained in step c),
- step d) optionally impregnating the molded article carbonated in step d) with an impregnating agent
- step f) optionally graphitizing the molded part carbonated in step d) or the molded part impregnated in step e).
- the waste parts or reject parts made of CFRP are carbonized before comminution in accordance with step a) or the product comminuted according to process step a) is carbonated before the optional oxidation, before the product thus obtained is subjected to process step b). is supplied.
- a fiber-matrix delamination can be carried out and the matrix material separated from the carbon fibers so that process step b) as the product of process step a ) only the carbon fibers are supplied.
- the separation is preferably carried out before the oxidative treatment, wherein the optional carbonization is preferably also carried out before the oxidative treatment, but after the separation.
- the process steps d) and e) can be carried out alternately several times in succession before the graphitization is carried out.
- waste parts or scrap parts of carbon fiber reinforced composite material which at least 20 vol .-% carbon fibers, more preferably 30 to 70 vol .-% carbon fibers and most preferably 40 to 60 vol. -% carbon fibers contains to use.
- the method according to the invention comprises the following steps: a) crushing waste parts or reject parts from a carbon-fiber-reinforced concrete and separating the matrix from the carbon fibers, preferably by sieving or sifting,
- step b) producing a mixture of the comminuted carbon fibers, pitch, coke and optionally one or more additives obtained in step a), the mixture containing less than 20% by weight of fibers,
- step c) shaping the mixture obtained in step b) into a molded part, d) carbonizing the molded article obtained in step c),
- step d) optionally impregnating the molded article carbonated in step d) with an impregnating agent
- step f) optionally graphitizing the molded part carbonated in step d) or the molded part impregnated in step e). Since the matrix material in this embodiment is necessarily separated from the carbon fibers before the carbon fibers are supplied to the process step b), preferably no carbonization occurs in this embodiment the process step d), ie in particular no carbonization of the waste parts or rejects before comminution according to process step a) and in particular also no carbonization of the product comminuted according to process step a).
- Another object of the present invention is a molded part and in particular a graphite electrode, a Graphititatiswin, a cathode for aluminum electrolysis cells, a blast furnace block or a molded part of fine-grained graphite, which (s) by the inventive method described above is available.
- the ground good was pourable and contained a dust content of approx.
- Example 3 Parts of the recycled fibers prepared in Example 1 and Example 2 were carbonized at 900 ° C for 20 hours under a nitrogen atmosphere. By weighing before and after the carbonization, the mass loss by the temperature treatment was determined to be about 40%. The flowability of the materials was improved by the carbonization. Examples 4 to 7 and Comparative Examples 1 and 2
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Abstract
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Priority Applications (11)
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RU2012138349/03A RU2547184C2 (ru) | 2010-02-10 | 2011-02-09 | Способ получения формованного изделия из углеродного материала с применением повторно переработанных карбоновых волокон |
KR1020127020897A KR101458681B1 (ko) | 2010-02-10 | 2011-02-09 | 재생 탄소 섬유를 사용하는 탄소 물질로부터의 성형품 생산 방법 |
CN201180007837.3A CN102762318B (zh) | 2010-02-10 | 2011-02-09 | 使用再利用的碳纤维从碳材料制备模制件的方法 |
PL11703863T PL2533913T3 (pl) | 2010-02-10 | 2011-02-09 | Sposób wytwarzania kształtek z materiału węglowego z zastosowaniem włókien węglowych |
MX2012007973A MX343392B (es) | 2010-02-10 | 2011-02-09 | Método para producir una parte moldeada a partir de un material de carbono utilizando una fibra de carbono reciclada. |
EP11703863.8A EP2533913B1 (de) | 2010-02-10 | 2011-02-09 | Verfahren zur herstellung eines formteils aus einem kohlenstoffwerkstoff unter verwendung von wiederverwerteten carbonfasern |
ES11703863T ES2711405T3 (es) | 2010-02-10 | 2011-02-09 | Procedimiento para producir una pieza conformada de un material carbonoso utilizando fibras de carbono recicladas |
JP2012552380A JP2013519498A (ja) | 2010-02-10 | 2011-02-09 | 再利用カーボン繊維を使用した炭素材料からの成形品の製造方法 |
BR112012019788-6A BR112012019788B1 (pt) | 2010-02-10 | 2011-02-09 | Processo para produqao de uma peqa moldada de um material de carbono, sob uso de fibras de carbono recicladas |
US13/571,635 US9352967B2 (en) | 2010-02-10 | 2012-08-10 | Method for producing a molded part from a carbon material using recycled carbon fibers and molded part |
US15/142,803 US10494508B2 (en) | 2010-02-10 | 2016-04-29 | Method for producing a molded part from a carbon material using recycled carbon fibers and molded part |
Applications Claiming Priority (2)
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DE102010001787A DE102010001787A1 (de) | 2010-02-10 | 2010-02-10 | Verfahren zur Herstellung eines Formteils aus einem Kohlenstoffwerkstoff unter Verwendung von wiederverwerteten Carbonfasern |
DE102010001787.6 | 2010-02-10 |
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US13/571,635 Continuation US9352967B2 (en) | 2010-02-10 | 2012-08-10 | Method for producing a molded part from a carbon material using recycled carbon fibers and molded part |
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US (2) | US9352967B2 (de) |
EP (1) | EP2533913B1 (de) |
JP (3) | JP2013519498A (de) |
KR (1) | KR101458681B1 (de) |
CN (1) | CN102762318B (de) |
BR (1) | BR112012019788B1 (de) |
DE (1) | DE102010001787A1 (de) |
ES (1) | ES2711405T3 (de) |
MX (1) | MX343392B (de) |
MY (1) | MY163556A (de) |
PL (1) | PL2533913T3 (de) |
RU (1) | RU2547184C2 (de) |
WO (1) | WO2011098486A1 (de) |
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WO2013017379A1 (de) * | 2011-08-01 | 2013-02-07 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur herstellung faserverstärkter keramischer formkörper |
EP2902433A1 (de) | 2014-02-03 | 2015-08-05 | Karl Meyer AG | Kohlenstofffaserpellet-Herstellungsverfahren |
Also Published As
Publication number | Publication date |
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EP2533913B1 (de) | 2019-01-23 |
EP2533913A1 (de) | 2012-12-19 |
MX2012007973A (es) | 2012-08-03 |
ES2711405T3 (es) | 2019-05-03 |
PL2533913T3 (pl) | 2019-06-28 |
US20160237248A1 (en) | 2016-08-18 |
JP2013519498A (ja) | 2013-05-30 |
BR112012019788A2 (pt) | 2016-05-17 |
KR20120104629A (ko) | 2012-09-21 |
JP2019193934A (ja) | 2019-11-07 |
RU2012138349A (ru) | 2014-03-20 |
CN102762318B (zh) | 2016-10-26 |
CN102762318A (zh) | 2012-10-31 |
MY163556A (en) | 2017-09-29 |
KR101458681B1 (ko) | 2014-11-05 |
DE102010001787A1 (de) | 2011-08-11 |
JP6805076B2 (ja) | 2020-12-23 |
US10494508B2 (en) | 2019-12-03 |
MX343392B (es) | 2016-11-04 |
US9352967B2 (en) | 2016-05-31 |
RU2547184C2 (ru) | 2015-04-10 |
BR112012019788B1 (pt) | 2020-11-24 |
JP2017141162A (ja) | 2017-08-17 |
US20130199412A1 (en) | 2013-08-08 |
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