US3140967A - Method of producing a cemented carbon electrode joint - Google Patents

Method of producing a cemented carbon electrode joint Download PDF

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Publication number
US3140967A
US3140967A US24965A US2496560A US3140967A US 3140967 A US3140967 A US 3140967A US 24965 A US24965 A US 24965A US 2496560 A US2496560 A US 2496560A US 3140967 A US3140967 A US 3140967A
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United States
Prior art keywords
cement
nipple
electrode
envelope
socket
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Expired - Lifetime
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US24965A
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English (en)
Inventor
Waldemar Kaufmann
Erich Fitzer
Hans-Joachim Pfleiderer
Alfred Pelz
Wilfried Hub
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Siemens Plania Werke AG
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Siemens Plania Werke AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/225—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of a settable material
    • 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
    • H05B7/14—Arrangements or methods for connecting successive electrode sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/915—Mastic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S403/00—Joints and connections
    • Y10S403/05—Carbon electrode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/924—Coupled nut and bolt
    • Y10S411/929—Thread lock
    • Y10S411/93—Flowing metal or settable material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49885—Assembling or joining with coating before or during assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49963—Threaded fastener
    • Y10T29/49964—At least one part nonmetallic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49966—Assembling or joining by applying separate fastener with supplemental joining
    • Y10T29/4997—At least one part nonmetallic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/47—Molded joint
    • Y10T403/472—Molded joint including mechanical interlock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/55—Member ends joined by inserted section
    • Y10T403/556—Section threaded to member

Definitions

  • Our invention relates to coaxial junctions of carbon electrodes for electric furnaces and other electric purposes, and particularly to electrode joints that comprise a double-conical threaded nipple plug of electrode material whose two conically tapering portions are screwed together with respective conical socket recesses in the front faces of the two coaxially aligned electrodes of graphite or other carbon material.
  • Such joints serve to connect a new electrode with the end of a nearly consumed electrode to permit continuous furnace operation by replenishing the electrode material in accordance with the rate of consumption. It is known to provide such nipple-screw junctions with a putty-like cement for improving the reliability of the electrode connection.
  • a quantity of cement is wrapped in a bag or other envelope, and the enveloped cement is then placed into the space between the socket bottom of an electrode and the screw nipple before these two parts are joined together.
  • the envelope of the cement consists of a material which is sufiiciently plastic or flaccid to permit deformation of the cement mass without destruction of the envelope while the envelope is being handled prior to its use in the joint.
  • the envelope material consists of substance which can readily be destroyed thermally and/ or chemically at the proper stage of use.
  • the envelope material is thermally and mechanically resistant at room temperature, especially at temperatures below 60 C., but becomes thermally decomposed at elevated temperatures below 100 C.
  • flaccid synthetic foil material such as polyethylene foil.
  • the envelope may also be formed by coating the mass of cement with a hardened layer of gelatin.
  • wrappers or envelopes satisfying the above-mentioned conditions are likewise suitable. They are preferably given the shape of flat bags or cylindrical containers.
  • the cement to be used for the purposes of the invention may be any of the known and commercially available pasty or putty-like carbon pastes and carbon cements such as those listed in Table 51, page 376 of Mantell, Industrial Carbon, 1946; D. Van Nostrand Company, Inc., New York. However, it is preferable to modify the basic cement mass by admixing catalyzers and/ or swelling agents as described further below.
  • the components of the electrode junction are especially designed for the above-mentioned cementing method. More specifically, one or more grooves are provided which extend transverse to the turns of the screw threads of nipple and socket from the front face of the nipple plug or from the socket bottoms of the electrodes and which may also extend over the front face of the nipple plug.
  • the grooves in the nipple and/ or in the threaded walls of the electrode sockets permit the cement to enter into all turns of the screw thread.
  • the grooves also constitute a pressure relief valve which reduces excessive gas pressure as may result from the condensation and carbonization of the cement or from the swelling agents that may be contained in the cement.
  • the grooves prevent bursting of the electrode joints, particularly of the electrode socket walls.
  • the grooves in the nipple and/ or in the electrode sockets extend up to the equator, i.e. the largest diameter of the double-conical plug or to the butt faces of the electrodes.
  • Such cementing between the electrode butt faces is preferably promoted by providing the butt faces with grooves or other recesses which preferably extend in radial directions and communicate with the socket space.
  • FIG. 1 is a longitudinal section in an axial plane of an electrode nipple junction, only the adjacent end por tions of the two electrodes being shown.
  • FIG. 2 is a section along the line IIII in FIG. 1.
  • FIGS. 3a, 3b and 3c are explanatory and serve to illustrate different stages of the method according to the invention.
  • FIG. 4 shows one elctrode joined with a nipple plug during an intermediate stage of the joining operation.
  • FIG. 5 is a schematic perspective view of a cemented electrode joint, partially cut away.
  • the two electrodes 1 and 2 joined with each other are provided with inten'orly threaded sockets 3, 4 extending inward from the respective butt faces.
  • the sockets are in threaded engagement with a double-conical nipple plug 4 consisting preferably of the same graphite or other carbon material as the electrodes.
  • the joint further contains cement at 9 and 10.
  • a quantity of cement within an envelope is placed between the front faces 5, 6 of the nipple plug 4 and the respective bottoms 7 and 8 of the electrode sockets (FIGS. 3a, 3b, 3c). After the filled envelopes 9, 10 are placed into the socket spaces, the electrodes and the nipple plug are tightly screwed together. As Will be explained, it is preferable to keep the enveloped cement quantity somewhat smaller than the volume of the socket space remaining when the electrodes are fully screwed together, so that the envelope remains intact and becomes destroyed thereafter by thermal and/or chemical action.
  • the nipple 4 is provided with four longitudinal grooves 12 (FIGS. 1, 2) whose depth is equal to that of the screw thread.
  • the front faces of the electrodes 1 and 2 are provided with radial grooves or recesses 13, 14 (FIG. 1).
  • FIGS. 3a, 3b, 3c illustrate how the tautly filled cement envelope permits symmetrizing the nipple plug relative to the electrode butt faces, as will be further explained below.
  • FIG. 4 shows how a tautly filled cement bag is pressed fiat by screwing the nipple plug together with an electrode and thus can be ruptured for releasing the cement simply by mechanical action.
  • FIG. illustrates a completed junction after the junction has been heated and carbonized. It can be seen in the cut-out of electrode 2 how the cement is distributed from the socket bottom through the distributor groove 12 into the nipple threads and into the gap between the butt faces of the electrode.
  • the envelope when handling the cement prior to its use in the electrode junction, is not subjected to appreciable stresses it can be given relatively small thickness so that it will burst open simply due to the mechanical pressure occurring when the nipple junction is screwed tight.
  • an envelope material which becomes destroyed by thermal and/ or chemical effect after the nipple junction is tightly screwed together and is heated when the electrode is inserted into the furnace.
  • the use of an elastic or flaccid envelope material has the advantage that the plasticity of the cement need not meet exacting requirements because the mass of cement is at first kept together by the envelope.
  • a cement mass which contains a pitch component, a component of synthetic plastic which thermally hardens prior to carbonization of the pitch, and if desired also a component of granular solid material, and additionally a component consisting of a swelling agent.
  • the carbon surfaces to be cemented are preferably pre-impregnated with a catalyzer to promote hardening, so that a preliminary hardening occurs rapidly as soon as the envelope is destroyed.
  • the hardening catalyzer has a decomposing effect upon the envelope and thus aids in the rupturing action mainly caused by heating or mechanical destruction.
  • benzol sulfo-acid hydrazide is particularly suitable as a swelling agent in an amount of 2 to by weight relative to the total weight of mixed cement mass. Also suitable as a swelling agent is ammonium phosphate in an amount of 2 to 10%.
  • chloranil acts as an oxidizer upon polyethylene envelope material and thus destroys the initially insulating intermediate polyethylene layer between the carbon and the cement mass.
  • the packaged quantity of cement is preferably so rated that the interspace between the front face of the nipple plug and the bottom of the electrode socket is filled only up to about four-fifths.
  • a pure synthetic-resin graphite cement is also a pure synthetic-resin graphite cement.
  • the viscosity of the cement being used is practically of no importance, no particular requirements being placed upon the consistency of the cement.
  • a heterogeneous cement composed of synthetic-resin, pitch and fine-granular solids may be used.
  • a cement that contains a thermally hardenable synthetic-resin capable of having a swelling efiect upon the finely ground pitch is further described below.
  • Such resin-pitch cements are preferably combined with swelling agents as already mentioned.
  • the swelling agent can be admixed in form of inorganic or organic compounds.
  • the plastic cement mass should have such a surface tension that foaming of the cement takes place so that the swelling agent does not escape in form of large bubbles without actually swelling the cement.
  • Particularly suitable as cements with swelling agents are the above-mentioned resin-pitch combinations particularly when the pitch is present in preliminarily somewhat swelled condition.
  • the cement contains hardening catalyzers which augment the thermal hardening of the cement by superimposed chemical reaction (condensation) after the cement has become distributed throughout the joint.
  • we use swelling agents which, when becoming decomposed, evolve a hardening catalyzer. This ensures that hardening of the cement occurs only after the foaming or swelling action.
  • Such combined-substance cements when heated, develop into a foam-type coke.
  • a foamy coke rigidly reinforces the junction because the coke during heating, breaks up into splinter-shaped particles which block the screw threads and thus reliably prevent loosening of the threaded junction even under vibratory stresses.
  • the foamy coke permits loosening the screw thread by brute force because the rotary unscrewing motion then grinds the coke into much finer particles. This is a fundamental improvement over the locking cements conventionally used which often result in breaking the nipple plug or electrode socket when an attempt is made to forcibly open the joint.
  • the packaged cement is inserted prior to screwing the nipple plug and electrodes together.
  • the electrode socket and the nipple plug are preferably so dimensioned that the cement envelope can be placed into the interspace between the socket bottom and the nipple front. It is preferable to keep this interspace so large that, when the joint is fully screwed together, the envelope is flattened but still intact, and is thereafter destroyed only by breaking and by the conjoint effect of the swelling agent contained in the cement.
  • the heating temperatures occurring in practice are in the vicinity of C. At these temperatures the cement, after being released from the envelope, penetrates into the completed nipple-screw junction and hence cements only the gap spaces that remain between nipple and socket threads after the junction is tightly screwed together.
  • the cementing method according to the invention also achieves the following advantage.
  • the nipple plug in electrode joints must be seated symmetrically between the two electrodes to prevent damage if the thermal expansion of the nipple plug differs from that of the socket-adjacent electrode portions.
  • the nipple plug is screwed asymmetrically into the sockets, i.e. when the nipple plug is first screwed into the lower socket until both flanks of the screw thread on the nipple tightly engage those of the socket, there is the danger that the nipple may be too tight in the lower electrode socket so as to cause bursting of the socket, whereas the nipple is too loose in the upper socket and hence may drop out of that socket when extreme stresses are encountered.
  • Various auxiliary devices have been proposed to prevent such an asymmetrical screw connection. However, the same effect can be achieved by virtue of the cementing method according to the invention without requiring any auxiliaries. This will be explained presently.
  • the nipple when being screwed by hand into the first socket, cannot be screwed down to such a depth that the nipple thread will abut on both flank sides against the socket thread. That is, when the nipple is screwed in by hand, the cement bag remains intact and serves as a stop so that the equator (laregst diameter) of the double-conical nipple plug stays away from the butt face of the electrode (FIG. 3a). That is, the nipple is cushioned on the cement bag.
  • the second cement bag (9 in FIG.
  • the bag or other package of cement is so tautly filled that its height (thickness) of the envelope, even when subjected to light screw pressure, is larger than the largest clearance between the socket bottom and the nipple front face when the nipple and electrode are screwed together. Then, the further tightening of the screw joint is possible only by mechanical destruction of the plastic cement bag (FIG. 4).
  • an electrode joint made according to the invention solidifies very rapidly to the desired high strength and then reliably preserves its high cementing strength during operation of the electrodes.
  • furnace electrodes in cold condition, are being inserted into an arc furnace the first phase of furnace operation during which the metal in the furnace is being melted, imposes an extremely high current load upon the electrodes.
  • the electrode joints are subjected to particularly great vibratory stresses. A large portion of the electric current passes from the electrode socket through the nipple threads and the nipple body.
  • the high contact resistance due to the reduced conducting cross section in the screw threads produces an appreciable amount of Joules heat.
  • This initially great amount of heat is particularly favorable for the desired rapid hardening of the cement located in the screw threads.
  • this effect can be augmented by departing from the conventional concepts in providing the butt faces of the electrodes with an insulating layer, for example an inserted thin foil of paper or synthetic plastic.
  • an insulating gasket of carbonaceous material has the effect that during the first few minutes of furnace operation the entire current will pass through the nipple plug thus causing a very rapid heating of the cement.
  • Such rapid heating also has the effect of rapidly carbonizing the insulating foil between the electrode faces which thus become conductive, whereafter the current also passes directly between the adjacent faces of the electrodes.
  • Example 1 Parts Description of Component per component Remarks weight (a) Carbonaceous 5-15 Coke (preferably Dusty wastes from solid. petrol coke) powcoke milling equipdered to a grain ment are generally size Resisuitable. tli ge on ignition:
  • softening point (according to Kraemer-Sarnow) 160175 (3., quinoline-insolubles, 20-30% powdered to a grain size 0.2 mm. (0) Synthetic 30-45 A resin hardenable resin. by acids: viscosity 2001000 cp. at 20 0., preferably a iufur-acroleineindene-condensate according to German Patent (DAS) 1,048,413. ((1) Swelling 2-6 Hydrazide of henagent. zene-sulfonic acid. (d) Hardening 0 Upon decomposiagent. tion of the swelling agent (between 70- 0.) products are formed, which act as hardening agents.
  • Example 3 Parts Description of Component per component Remarks weight Silieides of titanium or iron ('liSi or (a) Solids FeSi) grain size 5 Natural graphite: I grain size 100 1.
  • Hardening.-. 0.5-2 Aqueous solution of agent. phosphoric acid containing 10% aPO4.
  • said swelling agent consisting of benzol sulfo-acid hydrazide.
  • said swelling agent forming 2 to 10% of the total weight of the enveloped cement mass.
  • said step of subjecting said joints to envelope-destroying conditions comprising tightening the two electrodes onto the nipple plug threads and against the nipple plug ends to thereby destroy said two envelopes not later than when placing said joined electrodes into current-conducting operation, so that the individual cement masses are releases into said joints.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Discharge Heating (AREA)
  • Coating Apparatus (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
US24965A 1959-04-30 1960-04-27 Method of producing a cemented carbon electrode joint Expired - Lifetime US3140967A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DES62860A DE1290642B (de) 1959-04-30 1959-04-30 Nippelverbindung von Kohle- oder Graphitelektroden
DE1960S0070839 DE1440571A1 (de) 1959-04-30 1960-01-12 Verbindung zwischen kohlenstoffhaltigen Elektroden mittels eines zu verkittenden doppelkonischen Gewindenippels
DES66606A DE1186959B (de) 1959-04-30 1960-01-12 Verbindung zwischen kohlenstoffhaltigen Elektroden mittels eines zu verkittenden doppelkonischen Gewindenippels

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US3140967A true US3140967A (en) 1964-07-14

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US24965A Expired - Lifetime US3140967A (en) 1959-04-30 1960-04-27 Method of producing a cemented carbon electrode joint

Country Status (9)

Country Link
US (1) US3140967A (sv)
AT (1) AT244072B (sv)
CH (1) CH384103A (sv)
DE (3) DE1290642B (sv)
FI (1) FI40296B (sv)
FR (1) FR1255781A (sv)
GB (1) GB945494A (sv)
NL (2) NL132919C (sv)
SE (1) SE317147B (sv)

Cited By (29)

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US3405308A (en) * 1966-05-12 1968-10-08 Union Carbide Corp Strengthened arc carbon electrode joints
US3429759A (en) * 1963-06-17 1969-02-25 Union Carbide Corp High temperature cement
US3472301A (en) * 1967-10-18 1969-10-14 Loctite Corp Self-sealing mechanical fastener
US3517954A (en) * 1967-10-23 1970-06-30 Great Lakes Carbon Corp Electrode section-connecting nipple pre-assembly and process of assembling an electrode joint
US3517957A (en) * 1967-10-23 1970-06-30 Great Lakes Carbon Corp Nipple-electrode assembly and joint and method of making same
US3717911A (en) * 1971-02-09 1973-02-27 Great Lakes Carbon Corp Method of making a nipple-electrode joint
US3814828A (en) * 1971-02-09 1974-06-04 Great Lakes Carbon Corp Nipple-electrode assembly
US3884840A (en) * 1972-04-27 1975-05-20 British Steel Corp Graphite-pitch electrode paste
US3964948A (en) * 1973-12-01 1976-06-22 Maschinenfabrik Augsburg-Nurnberg Ag Method for dosing a locking agent into a threaded hole
US4208149A (en) * 1978-10-25 1980-06-17 Airco, Inc. Electrode connecting pin assembly
US4373829A (en) * 1978-11-13 1983-02-15 Braxell N Device for the joining of components
US4712957A (en) * 1985-12-11 1987-12-15 Wayne Edwards Adhesively secured fastener
US4725161A (en) * 1986-09-05 1988-02-16 Union Carbide Corporation Electrode joint
US4729689A (en) * 1984-12-13 1988-03-08 Union Carbide Corporation Electrode member and process for the production thereof
US4750761A (en) * 1984-11-23 1988-06-14 Watts John Dawson Oilwell tubular connection
EP0575271A1 (fr) * 1992-06-18 1993-12-22 Societe Des Electrodes Et Refractaires "Savoie" (Sers) Joint de raccordement d'électrodes de four électrique
WO1999028637A1 (de) * 1997-11-29 1999-06-10 Bümach Engineering International B.V. Dichtende gewindepaarung
US20040033120A1 (en) * 2001-08-15 2004-02-19 Ducker Andrew L. Sealable fastener with circumferential sealant channel and sealant delivery groove for delivering sealant into the circumferential sealant channel
US20050175062A1 (en) * 2004-01-20 2005-08-11 Brian Bowman End-face seal for graphite electrodes
US20050175061A1 (en) * 2004-01-20 2005-08-11 Michael Frastaci Locking ring for graphite electrodes
US20060291524A1 (en) * 2004-01-20 2006-12-28 Brian Bowman Joint strengthening ring for graphite electrodes
US20070047613A1 (en) * 2004-01-20 2007-03-01 Brian Bowman Locking ring for graphite electrodes having friction layer
US20070127540A1 (en) * 2004-01-20 2007-06-07 Brian Bowman End-face seal for male-female electrode joints
US20070127541A1 (en) * 2004-01-20 2007-06-07 Brian Bowman Locking ring for graphite electrodes
US20070217477A1 (en) * 2004-06-03 2007-09-20 Mark Segger Electrode joint locking system
US20070280327A1 (en) * 2004-01-20 2007-12-06 Smith Robert E Electrode joint
US20150211832A1 (en) * 2014-01-29 2015-07-30 Raytheon Company Internally coupleable joint
US20160174303A1 (en) * 2013-08-20 2016-06-16 Sgl Carbon Se Foil bag, carbon containing nipple, nipple kit, carbon containing electrode, electrode kit, electrode-nipple system, furnace and method of operating the furnace
TWI702349B (zh) * 2018-11-16 2020-08-21 台灣耐落螺絲工業股份有限公司 一體式導電防鬆漏之緊固件結構

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3418934A1 (de) * 1984-05-22 1985-11-28 Sigri GmbH, 8901 Meitingen Graphitelektrode fuer lichtbogenoefen und verfahren zu ihrer herstellung
DE202016005400U1 (de) 2016-09-06 2016-11-11 Sgl Carbon Se Kittstift Behältnisse für Verbindungen zwischen Elektroden

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US3429759A (en) * 1963-06-17 1969-02-25 Union Carbide Corp High temperature cement
US3405308A (en) * 1966-05-12 1968-10-08 Union Carbide Corp Strengthened arc carbon electrode joints
US3472301A (en) * 1967-10-18 1969-10-14 Loctite Corp Self-sealing mechanical fastener
US3517954A (en) * 1967-10-23 1970-06-30 Great Lakes Carbon Corp Electrode section-connecting nipple pre-assembly and process of assembling an electrode joint
US3517957A (en) * 1967-10-23 1970-06-30 Great Lakes Carbon Corp Nipple-electrode assembly and joint and method of making same
US3717911A (en) * 1971-02-09 1973-02-27 Great Lakes Carbon Corp Method of making a nipple-electrode joint
US3814828A (en) * 1971-02-09 1974-06-04 Great Lakes Carbon Corp Nipple-electrode assembly
US3884840A (en) * 1972-04-27 1975-05-20 British Steel Corp Graphite-pitch electrode paste
US3964948A (en) * 1973-12-01 1976-06-22 Maschinenfabrik Augsburg-Nurnberg Ag Method for dosing a locking agent into a threaded hole
US4208149A (en) * 1978-10-25 1980-06-17 Airco, Inc. Electrode connecting pin assembly
US4373829A (en) * 1978-11-13 1983-02-15 Braxell N Device for the joining of components
US4750761A (en) * 1984-11-23 1988-06-14 Watts John Dawson Oilwell tubular connection
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US4712957A (en) * 1985-12-11 1987-12-15 Wayne Edwards Adhesively secured fastener
US4725161A (en) * 1986-09-05 1988-02-16 Union Carbide Corporation Electrode joint
EP0575271A1 (fr) * 1992-06-18 1993-12-22 Societe Des Electrodes Et Refractaires "Savoie" (Sers) Joint de raccordement d'électrodes de four électrique
FR2692748A1 (fr) * 1992-06-18 1993-12-24 Savoie Electrodes Refract Joint de raccordement d'électrodes de four électrique.
AU658304B2 (en) * 1992-06-18 1995-04-06 Sgl Carbon S.A. Connecting joint for electric furnace electrodes
US5407290A (en) * 1992-06-18 1995-04-18 Societe Des Electrodes Et Connecting joint for electric furnace electrodes
WO1999028637A1 (de) * 1997-11-29 1999-06-10 Bümach Engineering International B.V. Dichtende gewindepaarung
CN1125924C (zh) * 1997-11-29 2003-10-29 比马赫国际工程公司 密封的螺纹对
US6902366B2 (en) * 2001-08-15 2005-06-07 Ducker, Iii Andrew L. Sealable fastener with circumferential sealant channel and sealant delivery groove for delivering sealant into the circumferential sealant channel
US20040033120A1 (en) * 2001-08-15 2004-02-19 Ducker Andrew L. Sealable fastener with circumferential sealant channel and sealant delivery groove for delivering sealant into the circumferential sealant channel
US20070280327A1 (en) * 2004-01-20 2007-12-06 Smith Robert E Electrode joint
US20060291524A1 (en) * 2004-01-20 2006-12-28 Brian Bowman Joint strengthening ring for graphite electrodes
US7324576B2 (en) 2004-01-20 2008-01-29 Graftech International Holdings Inc. Joint strengthening ring for graphite electrodes
US7466739B2 (en) 2004-01-20 2008-12-16 Graftech International Holdings Inc. Locking ring for graphite electrodes
US7324577B2 (en) 2004-01-20 2008-01-29 Graftech International Holdings Inc. End-face seal for male-female electrode joints
US20070047613A1 (en) * 2004-01-20 2007-03-01 Brian Bowman Locking ring for graphite electrodes having friction layer
US20070127540A1 (en) * 2004-01-20 2007-06-07 Brian Bowman End-face seal for male-female electrode joints
US20070127541A1 (en) * 2004-01-20 2007-06-07 Brian Bowman Locking ring for graphite electrodes
US20050175061A1 (en) * 2004-01-20 2005-08-11 Michael Frastaci Locking ring for graphite electrodes
US20050175062A1 (en) * 2004-01-20 2005-08-11 Brian Bowman End-face seal for graphite electrodes
WO2005074325A1 (en) * 2004-01-20 2005-08-11 Ucar Carbon Company Inc. End-face seal for graphite electrodes
US20070217477A1 (en) * 2004-06-03 2007-09-20 Mark Segger Electrode joint locking system
WO2005122642A1 (en) * 2004-06-03 2005-12-22 Ucar Carbon Company Inc. Locking ring for graphite electrodes
EP1752020A4 (en) * 2004-06-03 2011-03-02 Graftech Int Holdings Inc ELECTRODE JOINT LATCHING SYSTEM
US9313834B2 (en) 2004-06-03 2016-04-12 GrafTech Institute Holdings Inc. Electrode joint locking system
US20160174303A1 (en) * 2013-08-20 2016-06-16 Sgl Carbon Se Foil bag, carbon containing nipple, nipple kit, carbon containing electrode, electrode kit, electrode-nipple system, furnace and method of operating the furnace
US10244587B2 (en) * 2013-08-20 2019-03-26 Showa Denko Carbon Germany Gmbh Foil bag, carbon containing nipple, nipple kit, carbon containing electrode, electrode kit, electrode-nipple system, furnace and method of operating the furnace
US20150211832A1 (en) * 2014-01-29 2015-07-30 Raytheon Company Internally coupleable joint
US10634473B2 (en) * 2014-01-29 2020-04-28 Raytheon Company Internally coupleable joint
US11009326B2 (en) 2014-01-29 2021-05-18 Raytheon Company Internally coupleable joint
TWI702349B (zh) * 2018-11-16 2020-08-21 台灣耐落螺絲工業股份有限公司 一體式導電防鬆漏之緊固件結構

Also Published As

Publication number Publication date
FR1255781A (fr) 1961-03-10
NL250994A (sv) 1900-01-01
GB945494A (en) 1964-01-02
FI40296B (sv) 1968-09-02
DE1290642B (de) 1969-03-13
DE1186959B (de) 1965-02-11
CH384103A (de) 1964-11-15
SE317147B (sv) 1969-11-10
AT244072B (de) 1965-12-10
NL132919C (sv) 1900-01-01
DE1440571A1 (de) 1968-11-07

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