US3522006A - Process for the manufacture of carbon products - Google Patents

Process for the manufacture of carbon products Download PDF

Info

Publication number
US3522006A
US3522006A US679750A US3522006DA US3522006A US 3522006 A US3522006 A US 3522006A US 679750 A US679750 A US 679750A US 3522006D A US3522006D A US 3522006DA US 3522006 A US3522006 A US 3522006A
Authority
US
United States
Prior art keywords
products
panels
furnace
manufacture
crude
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US679750A
Other languages
English (en)
Inventor
Andre Legendre
Henri Des Rochettes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pechiney SA
Original Assignee
Pechiney SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pechiney SA filed Critical Pechiney SA
Application granted granted Critical
Publication of US3522006A publication Critical patent/US3522006A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • 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
    • C01B32/90—Carbides
    • 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
    • C04B35/56—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 carbides or oxycarbides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area

Definitions

  • the invention is addressed to the manufacture of amorphous or graphitized carbon products from crude carbonaceous products in an electrical furnace of the Acheson type in which use is made of a granulated carbonaceous material surrounding the crude products and in which the improvement comprises the utilization of panels of an electrically insulating substance positioned between the products and the source of electrical current in a direction perpendicular to the direction of current to reduce the passage of electrical current through said products, at least during passage of the products through a critical heating range.
  • This invention is addressed to the manufacture of carbon products in an electrical furnace of the Acheson type.
  • the invention relates to the treatment of crude products shaped of a mixture of carbonaceous base material such as coke and a carbonaceous binder such as pitch.
  • Such crude products have been treated by heating in a combustion furnace, such as a tunnel furnace, or a chamber furnace, heated by producers gas or mazout gas wherein the crude products are raised to a temperature of about 600 to 120-0 C.
  • a combustion furnace such as a tunnel furnace, or a chamber furnace
  • gases or mazout gas wherein the crude products are raised to a temperature of about 600 to 120-0 C.
  • burned products can be marketed with the carbon in the form referred to as amorphous carbon.
  • the amorphous carbon of the burned products can be converted to graphite by subsequent heat treatment in an electrical graphitization furnace.
  • Such electrical graphitization furnaces are of the type conceived by E. G. Acheson in 1895 in which the product to be graphitized is located between two current supply heads with the space between the products being filled with granulated carbonaceous material, generally re ferred to as the granulated charging material, and which completely surrounds the products.
  • the granulated charging material is formed partially of new coke, i.e. which has not previously been employed in the assembly of an Acheson furnace, and'partially of granulated material recovered from a previous graphitization operation.
  • the resistor is usually brought up to a temperature of 2700 to 2900 C.
  • Crude products have also been charged directly into an electrical graphitization furnace without previous heat treatment for burning.
  • the burning and graphitization are carried out as a single operation, without intermediate cooling.
  • Such single step process provides a number of advantages, such as savings in time, heat, labor and materials, and lower original investment costs.
  • FIG. 1 is a sectional view of an Acheson furnace resistor with panels embodying the features of this invention
  • FIG. 2 is a sectional view taken along the line A-B of FIG. 1;
  • FIG. 3 is a sectional view taken lengthwise in a vertical plan along the line C-D.
  • the crude products are burned in an electrical furnace of the Acheson type comprising a carbonaceous granulated charging material which surrounds the crude product, characterized by interposition, in the passage of the electrical current between the crude products, of panels of an electrically insulating substance oriented perpendicularly to the direction of the current and then preferably subjecting the burned product to graphitization without intermediate cooling, thereby to achieve burning and graphitization in a single operation.
  • the investigations have established that the temperature imbalance is produced chiefly in a critical temperature zone, generally in the range of 250 to 650 C., and that it is due to a particularly sharp drop in resistivity of the crude products during the temperature rise of the furnace.
  • a critical temperature zone generally in the range of 250 to 650 C.
  • resistivity of the portions overheated decreases rapidly whereby the density of the current passing through the overheated portions increases proportionately.
  • the electrically insulating panels are formed of a carbonaceous material such as wood fibers bonded with a phenol aldehyde resin, corrugated cardboard or the like materials which can be reduced to a carbonaceous residue after burning.
  • a carbonaceous material such as wood fibers bonded with a phenol aldehyde resin, corrugated cardboard or the like materials which can be reduced to a carbonaceous residue after burning.
  • the thickness of the panels may be varied over a fairly wide range such as from 2 mm. to cm., depending somewhat upon the nature of the electrically insulating substance of which the panels are formed.
  • the surface area of the panels is selected to be within the range of 0.4 to 2 times and preferably 0.8 to 1.2 times the transverse section of the crude products in the resistor.
  • the panels are positioned with their upper ends below the upper ends of the crude products so that current is free to pass between the upper end portions of the products. Under such circumstances, the upper portion of the resistor, which has a tendency to heat up more slowly than the remainder, will be heated additionally by the passage of said current.
  • 1 indicates the crude products to be graphitized; 2 represents the granulated charging material arranged in accordance with the practice of this invention; 3 is the panels, and 4 represents the heat insulating material surrounding the resistor.
  • the arrows indicate how the passage of electrical current is greatly reduced or even entirely suppressed through the products by reason of the presence of the electrically insulating panels.
  • Example 1 the single operation is effected in accordance with the prior art while Example 2 makes use of the process and concepts of this invention.
  • the furnace charge is formed of 36 tons of crude products of cylin- Example 1
  • Example 2 according to according to the prior art the invention

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Ceramic Products (AREA)
US679750A 1966-11-21 1967-11-01 Process for the manufacture of carbon products Expired - Lifetime US3522006A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR84269A FR1508211A (fr) 1966-11-21 1966-11-21 Procédé de fabrication de produits carbonés

Publications (1)

Publication Number Publication Date
US3522006A true US3522006A (en) 1970-07-28

Family

ID=8621294

Family Applications (1)

Application Number Title Priority Date Filing Date
US679750A Expired - Lifetime US3522006A (en) 1966-11-21 1967-11-01 Process for the manufacture of carbon products

Country Status (6)

Country Link
US (1) US3522006A (enrdf_load_stackoverflow)
BE (1) BE750402Q (enrdf_load_stackoverflow)
DE (1) DE1646914B1 (enrdf_load_stackoverflow)
FR (1) FR1508211A (enrdf_load_stackoverflow)
GB (1) GB1207525A (enrdf_load_stackoverflow)
SE (1) SE310859B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049900A (en) * 1975-05-26 1977-09-20 Elettrocarbonium S.P.A. Continuous graphitizing furnace with a vertical displacement of the charge
DE4208583A1 (de) * 1991-03-22 1992-09-24 Tokai Carbon Kk Vorrichtung zur herstellung von siliciumcarbid-whiskern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US702758A (en) * 1900-12-13 1902-06-17 Internat Acheson Graphite Company Method of graphitizing electrodes.
US749418A (en) * 1904-01-12 Method of making carbon articles
US1357290A (en) * 1919-12-18 1920-11-02 Republic Carbon Company Method of manufacturing graphite articles
US1390823A (en) * 1920-07-31 1921-09-13 Sieurin Sven Emil Burning of carbon electrodes
US2644020A (en) * 1950-03-28 1953-06-30 Union Carbide & Carbon Corp Graphitization of carbon articles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE865035C (de) * 1950-03-28 1953-01-29 Union Carbide & Carbon Corp Verfahren zum Brennen von geformten Gebilden, insbesondere von Elektroden aus Kohlenstoff

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US749418A (en) * 1904-01-12 Method of making carbon articles
US702758A (en) * 1900-12-13 1902-06-17 Internat Acheson Graphite Company Method of graphitizing electrodes.
US1357290A (en) * 1919-12-18 1920-11-02 Republic Carbon Company Method of manufacturing graphite articles
US1390823A (en) * 1920-07-31 1921-09-13 Sieurin Sven Emil Burning of carbon electrodes
US2644020A (en) * 1950-03-28 1953-06-30 Union Carbide & Carbon Corp Graphitization of carbon articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049900A (en) * 1975-05-26 1977-09-20 Elettrocarbonium S.P.A. Continuous graphitizing furnace with a vertical displacement of the charge
DE4208583A1 (de) * 1991-03-22 1992-09-24 Tokai Carbon Kk Vorrichtung zur herstellung von siliciumcarbid-whiskern

Also Published As

Publication number Publication date
FR1508211A (fr) 1968-01-05
DE1646914B1 (de) 1972-02-03
BE750402Q (fr) 1970-10-16
GB1207525A (en) 1970-10-07
SE310859B (enrdf_load_stackoverflow) 1969-05-12

Similar Documents

Publication Publication Date Title
CA1180556A (en) Compacted carbonaceous shapes and process for making the same
BR9307118A (pt) Método e aparelho para melhorar combustível carbonáceo
US2178773A (en) Silicon carbide and manufacture thereof
US1440724A (en) Electrode for electric furnaces and process for manufacturing the same
US4100265A (en) Process for preparation of high quality coke
US3522006A (en) Process for the manufacture of carbon products
US1357290A (en) Method of manufacturing graphite articles
US702758A (en) Method of graphitizing electrodes.
CN112521152A (zh) 一种φ700mm超高功率石墨电极的制备工艺
US2495763A (en) Coking process
US749418A (en) Method of making carbon articles
SU532567A1 (ru) Способ получени графитированных изделий
SU743950A1 (ru) Способ получени графитированных изделий
SU1189806A1 (ru) Способ изготовлени прессованных углеродных блоков
JP2812870B2 (ja) 乾留炉における高温乾留ガス供給方法
US750170A (en) Method of electric heating
US1656617A (en) Method of distilling coal
CN223243298U (zh) 一种石墨匣钵电驱焙烧炉
SU654846A1 (ru) Электрокальцинатор
US2504150A (en) Coking expanding coals
US1517122A (en) paolo ni
JPH0238548B2 (enrdf_load_stackoverflow)
GB870730A (en) Improvements in thermal processing of green carbon articles
US1306289A (en) Vanxa
SU387790A1 (ru) Способ получения карбидов