US3563705A - Method of inhibiting puffing in the manufacture of graphite bodies - Google Patents

Method of inhibiting puffing in the manufacture of graphite bodies Download PDF

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Publication number
US3563705A
US3563705A US807963A US3563705DA US3563705A US 3563705 A US3563705 A US 3563705A US 807963 A US807963 A US 807963A US 3563705D A US3563705D A US 3563705DA US 3563705 A US3563705 A US 3563705A
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US
United States
Prior art keywords
pulling
coke
puffing
titanium
sulfur
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
US807963A
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English (en)
Inventor
Lloyd I Grindstaff
Mack P Whittaker
Michael F Baud
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.)
SGL Carbon Corp
Original Assignee
Great Lakes Carbon Corp
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 Great Lakes Carbon Corp filed Critical Great Lakes Carbon Corp
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Publication of US3563705A publication Critical patent/US3563705A/en
Assigned to MANUFACTURERS HANOVER TRUST COMPANY A NY CORP. reassignment MANUFACTURERS HANOVER TRUST COMPANY A NY CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GREAT LAKES CARBON CORPORATION, A DE CORP
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C04B35/528—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

Definitions

  • a petroleum coke of low sulfur content is the generally preferred raw material.
  • the coke is first calcined at temperatures of 1000 or more, a process during which it loses its volatile components and some of its sulfur content.
  • the calcined coke is then ground and mixed with a carbonizable binder such as pitch and the mixture is formed into the desired shape, for example by extrusion.
  • the body thus obtained is carefully baked to calcining temperatures to carbonize the binder and set the mass, and the baked material is further heated to temperatures of over 2000 to cause graphitization.
  • the present invention therefore contemplates the elimination of the delayed pufiing that takes place in graphitizable masses containing anti-pulling substances such as iron and calcium compounds.
  • Another of its objects is to provide a process which will significantly minimize pulling without resort to the impractical expedient of heating the graphitizable mass at substantially lower than normal rates in cases where such an expedient is applicable.
  • Another object is to increase the supply of coke usable for the manufacture of electrodes and related articles by rendering available high sulfur cokes which are 3,563,705 Patented Feb. 16, 1971 presently ineligible due to a propensity to expand severely during heat treatment to graphitization temperatures even in the presence of conventional anti-pulling agents.
  • titanium or zirconium compound content of about 0.05 to 5 parts per parts of coke, calculated as TiO or ZrO has been found most effective. Larger proportions of titanium-class compounds will also be effective but are likely to create problems in certain applications because of the undesirable presence of larger quantities of residual titanium in the finished graphite article.
  • the preferred proportion of titanium-class inhibitor in the graphitizable mixtures of the invention lies within the range of about 0.1 to 1 part per 100 parts of coke.
  • the preferred delayed pulling inhibitors include the oxides of titanium and zirconium as well as mixtures thereof and mixtures of said oxides with other anti-pulling metallic oxides.
  • the mixtures may be natural or synthetic.
  • the carbon bodies in the examples were made from calcined petroleum cokes having a particle size distribution of 35 mesh to l00 mesh and a sulfur content of about 1% by weight. All the cokes used were needle cokes of the type described in US. Pats. 2,775,549 and 2,922,755 and exhibited irreversible expansion during graphitization.
  • the selected coke was mixed in a standard manner with a coal tar pitch binder in proportions of 4:1 by weight.
  • Particulate puffing inhibitors were added to the mix and blended uniformly as indicated and the mixtures were formed by hot pressing in an electrically heated mold, for example at 12,500 p.s.i.g. for 30 seconds at 100 C.
  • the cylindrical bodies thus formed were baked to a temperature of about 850 C.
  • the delayed puffing inhibitors of this invention i.e. compounds of titanium and zirconium, are equally effective in carbon bodies made with coke particles larger than 35 to l00 mesh which normally exhibit extensive pulling when iron oxide is used alone.
  • the improvement which comprises additionally incorporating into the coke-binder mixture a delayed pulling inhibitor selected from the group consisting of titanium compounds, zirconium compounds, and mixtures thereof.
  • the delayed pulling inhibitor consists of about 0.1 to 1 part per parts by weight of coke of titanium dioxide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Products (AREA)
US807963A 1969-03-17 1969-03-17 Method of inhibiting puffing in the manufacture of graphite bodies Expired - Lifetime US3563705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80796369A 1969-03-17 1969-03-17

Publications (1)

Publication Number Publication Date
US3563705A true US3563705A (en) 1971-02-16

Family

ID=25197537

Family Applications (1)

Application Number Title Priority Date Filing Date
US807963A Expired - Lifetime US3563705A (en) 1969-03-17 1969-03-17 Method of inhibiting puffing in the manufacture of graphite bodies

Country Status (5)

Country Link
US (1) US3563705A (de)
JP (1) JPS4947637B1 (de)
DE (1) DE2012043C3 (de)
GB (1) GB1267772A (de)
SE (1) SE348717B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190637A (en) * 1978-07-18 1980-02-26 The United States Of America As Represented By The United States Department Of Energy Graphite having improved thermal stress resistance and method of preparation
EP0022855A1 (de) * 1979-02-02 1981-01-28 Great Lakes Carbon Corp Herstellung rauchlosen erdölkoks durch verzögertes verkoken.
DE3907155C1 (de) * 1989-03-06 1990-03-22 Sigri Gmbh, 8901 Meitingen, De
DE3907158C1 (de) * 1989-03-06 1990-04-19 Sigri Gmbh, 8901 Meitingen, De
DE3907156A1 (de) * 1989-03-06 1990-09-13 Sigri Gmbh Verfahren zur inhibierung des puffing von aus steinkohlenteerpechen hergestellten koksen
DE3907159A1 (de) * 1989-03-06 1990-09-20 Sigri Gmbh Verfahren zur herstellung nicht puffender kohlenstofformkoerper
US5018639A (en) * 1989-04-22 1991-05-28 Philipp Holzmann Ag Storage container for low-temperature liquids
US20080048154A1 (en) * 2003-09-20 2008-02-28 Djamschid Amirzadeh-Asl Method for Improving the Durability of Carbon or Graphite Electrodes by Using Tio2 -Containing Products
US20100009193A1 (en) * 2006-12-22 2010-01-14 Akiyoshi Takeda Graphite material method for manufacturing the same
WO2014147434A1 (en) 2013-03-21 2014-09-25 Gerhard Hubweber Method and installation to produce graphite bodies

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5458751U (de) * 1977-09-30 1979-04-23
JPS567903U (de) * 1979-06-30 1981-01-23
KR102484849B1 (ko) 2015-12-18 2023-01-05 주식회사 위츠 코일 조립체
MX2023011811A (es) * 2021-04-09 2023-10-13 Mitsubishi Chem Corp Coque de aguja para electrodo de grafito, metodo de fabricacion de coque de aguja e inhibidor.

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190637A (en) * 1978-07-18 1980-02-26 The United States Of America As Represented By The United States Department Of Energy Graphite having improved thermal stress resistance and method of preparation
EP0022855A1 (de) * 1979-02-02 1981-01-28 Great Lakes Carbon Corp Herstellung rauchlosen erdölkoks durch verzögertes verkoken.
EP0022855A4 (de) * 1979-02-02 1981-08-28 Great Lakes Carbon Corp Herstellung rauchlosen erdölkoks durch verzögertes verkoken.
US5068026A (en) * 1989-03-06 1991-11-26 Sigri Gmbh Process for the production of non-puffing shaped carbon bodies
DE3907158C1 (de) * 1989-03-06 1990-04-19 Sigri Gmbh, 8901 Meitingen, De
DE3907156A1 (de) * 1989-03-06 1990-09-13 Sigri Gmbh Verfahren zur inhibierung des puffing von aus steinkohlenteerpechen hergestellten koksen
DE3907159A1 (de) * 1989-03-06 1990-09-20 Sigri Gmbh Verfahren zur herstellung nicht puffender kohlenstofformkoerper
DE3907155C1 (de) * 1989-03-06 1990-03-22 Sigri Gmbh, 8901 Meitingen, De
US5104518A (en) * 1989-03-06 1992-04-14 Sigri Gmbh Process for the inhibition of the puffing of cokes produced from coal tar pitches
US5018639A (en) * 1989-04-22 1991-05-28 Philipp Holzmann Ag Storage container for low-temperature liquids
US20080048154A1 (en) * 2003-09-20 2008-02-28 Djamschid Amirzadeh-Asl Method for Improving the Durability of Carbon or Graphite Electrodes by Using Tio2 -Containing Products
US7820129B2 (en) * 2003-09-20 2010-10-26 Sachtleben Chemie Gmbh Method for improving the durability of carbon or graphite electrodes by using Tio2—containing products
US20100009193A1 (en) * 2006-12-22 2010-01-14 Akiyoshi Takeda Graphite material method for manufacturing the same
US8623510B2 (en) * 2006-12-22 2014-01-07 Toyo Tanso Co., Ltd. Graphite material and method for manufacturing the same
WO2014147434A1 (en) 2013-03-21 2014-09-25 Gerhard Hubweber Method and installation to produce graphite bodies
DE112013006851B4 (de) * 2013-03-21 2017-10-12 Gerhard Hubweber Verfahren und Anlage zur Erzeugung von Graphitkörpern

Also Published As

Publication number Publication date
DE2012043C3 (de) 1973-11-22
DE2012043B2 (de) 1973-05-03
GB1267772A (en) 1972-03-22
JPS4947637B1 (de) 1974-12-17
DE2012043A1 (de) 1970-10-08
SE348717B (de) 1972-09-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MANUFACTURERS HANOVER TRUST COMPANY A NY CORP.

Free format text: SECURITY INTEREST;ASSIGNOR:GREAT LAKES CARBON CORPORATION, A DE CORP;REEL/FRAME:004376/0430

Effective date: 19850228