US1723582A - Electrode for electric furnaces - Google Patents
Electrode for electric furnaces Download PDFInfo
- Publication number
- US1723582A US1723582A US181821A US18182127A US1723582A US 1723582 A US1723582 A US 1723582A US 181821 A US181821 A US 181821A US 18182127 A US18182127 A US 18182127A US 1723582 A US1723582 A US 1723582A
- Authority
- US
- United States
- Prior art keywords
- electrode
- inserts
- mass
- baked
- electric furnaces
- 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
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Classifications
-
- 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
- H05B7/09—Self-baking electrodes, e.g. Söderberg type electrodes
Definitions
- the present invention relates to the soelectric furnace.
- These electrodes consist ,l of a lower part where the electrode mass is baked and is a good conductor and an upper part where the mass is raw and non-conductive.
- special precautions must be taken and several modes of application thereof have previously been described, for instance in U. S. Patent No. 1,441,037 and No. 1,440,724, where various conductive ribs and inserts have been shown.
- Such inserts may consist of metal or of ready baked pieces of carbon or graphite.
- inserts may be embedded in the electrode mass in difierent ways, but I have found that in many cases it is advantageous to arrange them at the periphery of the electrode in such manner that they are directly in touch with the current-carrying contacts or the part of the electrode casing inside said contacts, if an electrode casing is employed.
- the principal object of the present invention is to provide a good attachment between the inserts and the electrode -mass by giving the carbon inserts such a shape that the electrode mass may penetrate into or surround the single parts of the carbon inserts. When the mass'has been baked the carbon inserts will then be completely fixedthereto.
- Another object of the invention is to provide a self-bakin electrode in which the mantle or shell is ormed of sections of prebaked electrode material, the core of the electrode, as usual being, formed of raw electrode mass. In such an electrode the contacts make contact directly against the pre-baked sections forming the shell.
- FIG. 1 shows a longitudinal section of a continuous electrode constructed in accordance with this invention.
- F'gure 2 shows a horizontal section of the electrode illustrated in Fig. 1.
- electrodemass is indicated at 1 and the pre-baked sections forming the shell or casing of the electrode are indicated at 2, such sections or inserts having cavities 3, which may be of different shapes as indicated in the upper and lower sections or inserts rewhile in use in the electric furnace comprising raw electrode mass and acasing, the casing being formed. of pre-baked carbon inserts arranged at the periphery of the electrode in abutting relation.
- An electrode of the kind that is baked while in use in the electric furnace comprising raw electrode mass and a casing, the casing being formed of pre-baked carbon inserts arranged at the peripher of the electrode in abutting relation an having portions interlocked with the raw electrode mass, whereby when such mass is baked a reliable fixation of the carbon inserts and the mass will be obtained.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Furnace Details (AREA)
Description
Aug. 6, 1929. SEM 1,723,582
ELECTRODE FOR ELECTRI C FURNACES Filed April *7, 7
INVENTOR.
Patented A115 6, 1929 UNITED STATES PATENT OFFICE.
MATEIAS OVBOM SEE, OF OSLO, NORWAY, LSSIGNOR T DET NORSEE AKTIESELSKAB FOB ELEKTBOKEMISK INDUSTRI OF NORWAY, 0F OSLO, NORWAY.
ELECTRODE FOR ELECTRIC FURNACES.
, Application filed April 7, 1927, Serial No. 181,821, and in Norway April 7, 1926.
. The present invention relates to the soelectric furnace. These electrodes consist ,l of a lower part where the electrode mass is baked and is a good conductor and an upper part where the mass is raw and non-conductive. To securea good transmission of current from the current supplying devices to the baked part of the electrode special precautions must be taken and several modes of application thereof have previously been described, for instance in U. S. Patent No. 1,441,037 and No. 1,440,724, where various conductive ribs and inserts have been shown. Such inserts may consist of metal or of ready baked pieces of carbon or graphite. These inserts may be embedded in the electrode mass in difierent ways, but I have found that in many cases it is advantageous to arrange them at the periphery of the electrode in such manner that they are directly in touch with the current-carrying contacts or the part of the electrode casing inside said contacts, if an electrode casing is employed.
.1 have now found that in such cases and especially with big-electrodes it is difiicult to et a good attachment of the peripheral carfion inserts. These will easily fall off the electrode at its lower part as no satisfactory binding of the'carbon inserts to the adjacent electrode mass isv obtained. The" carbon inserts must therefore be suspended one in the other which is complicated and unsafe.
The principal object of the present invention is to provide a good attachment between the inserts and the electrode -mass by giving the carbon inserts such a shape that the electrode mass may penetrate into or surround the single parts of the carbon inserts. When the mass'has been baked the carbon inserts will then be completely fixedthereto.
4 Another object of the invention is to provide a self-bakin electrode in which the mantle or shell is ormed of sections of prebaked electrode material, the core of the electrode, as usual being, formed of raw electrode mass. In such an electrode the contacts make contact directly against the pre-baked sections forming the shell.
' In the drawing forming part of this application an example of my invention is illustrated, but it is to be understood that my invention is not limited thereto.
In such drawing Figure 1 shows a longitudinal section of a continuous electrode constructed in accordance with this invention. F'gure 2 shows a horizontal section of the electrode illustrated in Fig. 1.
Referring more particularly to the drawing electrodemass is indicated at 1 and the pre-baked sections forming the shell or casing of the electrode are indicated at 2, such sections or inserts having cavities 3, which may be of different shapes as indicated in the upper and lower sections or inserts rewhile in use in the electric furnace comprising raw electrode mass and acasing, the casing being formed. of pre-baked carbon inserts arranged at the periphery of the electrode in abutting relation.
' 2. An electrode of the kind that is baked while in use in the electric furnace comprising raw electrode mass and a casing, the casing being formed of pre-baked carbon inserts arranged at the peripher of the electrode in abutting relation an having portions interlocked with the raw electrode mass, whereby when such mass is baked a reliable fixation of the carbon inserts and the mass will be obtained.
Signed at New York, N. Y. this 5th day of April, 1927. Y
MATHILS OVROM SEM.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO1723582X | 1926-04-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1723582A true US1723582A (en) | 1929-08-06 |
Family
ID=19910389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US181821A Expired - Lifetime US1723582A (en) | 1926-04-07 | 1927-04-07 | Electrode for electric furnaces |
Country Status (1)
Country | Link |
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US (1) | US1723582A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3378622A (en) * | 1967-06-15 | 1968-04-16 | Carborundum Co | Method of joining electrode bodies of dissimilar thermal coefficients of expansion |
US4575856A (en) * | 1984-05-18 | 1986-03-11 | Pennsylvania Engineering Corporation | Iron free self baking electrode |
US5778021A (en) * | 1994-07-21 | 1998-07-07 | Elkem Asa | Self-baking carbon electrode |
US6590926B2 (en) | 1999-02-02 | 2003-07-08 | Companhia Brasileira Carbureto De Calcio | Container made of stainless steel for forming self-baking electrodes for use in low electric reduction furnaces |
US6625196B2 (en) | 1999-02-02 | 2003-09-23 | Companhia Brasileira Carbureto De Calcio | Container made of aluminum and stainless steel for forming self-baking electrodes for use in low electric reduction furnaces |
-
1927
- 1927-04-07 US US181821A patent/US1723582A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3378622A (en) * | 1967-06-15 | 1968-04-16 | Carborundum Co | Method of joining electrode bodies of dissimilar thermal coefficients of expansion |
US4575856A (en) * | 1984-05-18 | 1986-03-11 | Pennsylvania Engineering Corporation | Iron free self baking electrode |
US5778021A (en) * | 1994-07-21 | 1998-07-07 | Elkem Asa | Self-baking carbon electrode |
US6590926B2 (en) | 1999-02-02 | 2003-07-08 | Companhia Brasileira Carbureto De Calcio | Container made of stainless steel for forming self-baking electrodes for use in low electric reduction furnaces |
US6625196B2 (en) | 1999-02-02 | 2003-09-23 | Companhia Brasileira Carbureto De Calcio | Container made of aluminum and stainless steel for forming self-baking electrodes for use in low electric reduction furnaces |
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