NO122441B - - Google Patents
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- Publication number
- NO122441B NO122441B NO1488/69A NO148869A NO122441B NO 122441 B NO122441 B NO 122441B NO 1488/69 A NO1488/69 A NO 1488/69A NO 148869 A NO148869 A NO 148869A NO 122441 B NO122441 B NO 122441B
- Authority
- NO
- Norway
- Prior art keywords
- substances
- hollow
- arc
- electrode
- coking
- Prior art date
Links
- 239000000126 substance Substances 0.000 claims description 7
- 238000004939 coking Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000000197 pyrolysis Methods 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Discharge Heating (AREA)
- Carbon And Carbon Compounds (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Sealing Devices (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Hulelektrode av grafitt.
Det er kjent i elektrotermi, spesielt ved elektrostål-fremstilling, å anvende hul- eller vekeelektroder, da elektrodeendenes ringformede utformning stabiliserer lysbuen.
Det er også kjent at ved innføring av ioniserende gasser, f.eks. argon, nitrogen og lignende, inntrer en stabiliseringsøkning, og derved forbedres vesentlig lysbuens brennerbetingelser for så vidt som den termiske virkningsgrad øker, en ugunstig virkning på strøm-nettet reduseres og fremfor alt forlenges den ildfaste forings leve-tid, som sterkt belaster elektrostålets omkostninger.
Betinget av elektrodenes fremstilling oppstår ved binde-midlets spaltning en viss porøsitet gjennom hele elektrodens struktur, hvorigjennom en del av den under et visst trykk tilførte gass vandrer bort og går tapt og dermed ikke mer står til disposisjon ved elektrodenes brennerende for lysbuestabiliseringen.
Da de anvendte gasser, som f.eks. argon, er dyre,
har man undertrykket disse gasstap ved at man har gjort hulningens overflate gasstett med forkoksbare stoffer som"bek etc. samt kunst-harpiks, sukkeroppløsning, vannglassoppløsning eller lignende.
Hulelektrodens indre flate blir spesielt virksom ugjennomtrengelig ved dannelse av pyrolytisk karbon fra gassfasen.
Ved hulelektroden ifølge oppfinnelsen er det til de -forkoksbare stoffer satt lysbuestabiliserende stoffer, eksempelvis KBFjij, K2SO^, WC, TiC.
Ved forsøk ble det fastslått at ved denne tilsetning, som fremstillingsmessig er enkel, influeres brennerforholdet gunstig. Selvsagt kan det også anvendes tilsvarende ioniserende stoffer med tilsvarende like eller bedre virkninger.
Ved hulelektroden ifølge oppfinnelsen unngås således ikke bare argontap etc, men samtidig oppnås også en ekstra lysbue-stabiliseringseffekt som er av spesiell betydning med hensyn til virkningen på strømnettet og levetiden av lysbueovnens ildfaste foring.
Claims (1)
- Hulelektrode av grafitt i hvilken hulningens overflate er gjort gasstett med forkoksbare stoffer, som f.eks. ved pyrolyse avsettes i elektrodens porer, karakterisert ved at til de forkoksbare stoffer er tilsatt lysbuestabiliserende stoffer, eksempelvis KBF^, ^SO^, WC, TiC. Anførte publikasjoner:Norsk patent nr. 86.476, 106.211
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681758394 DE1758394C3 (de) | 1968-05-24 | Hohlelektrode aus Kohle oder Graphit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO122441B true NO122441B (no) | 1971-06-28 |
Family
ID=5695010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO1488/69A NO122441B (no) | 1968-05-24 | 1969-04-11 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3588307A (no) |
| AT (1) | AT290868B (no) |
| BE (1) | BE731748A (no) |
| CH (1) | CH535527A (no) |
| ES (1) | ES365395A1 (no) |
| FR (1) | FR2014138B1 (no) |
| GB (1) | GB1271681A (no) |
| LU (1) | LU58225A1 (no) |
| NL (1) | NL6905619A (no) |
| NO (1) | NO122441B (no) |
| SE (1) | SE350983B (no) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490824A (en) * | 1983-07-15 | 1984-12-25 | Great Lakes Carbon Corporation | Composite electrode for arc furnace |
| US4513425A (en) * | 1983-07-15 | 1985-04-23 | Great Lakes Carbon Corporation | Composite electrode for arc furnace |
-
1969
- 1969-03-18 LU LU58225D patent/LU58225A1/xx unknown
- 1969-03-19 AT AT268369A patent/AT290868B/de not_active IP Right Cessation
- 1969-03-28 ES ES365395A patent/ES365395A1/es not_active Expired
- 1969-03-31 SE SE04545/69A patent/SE350983B/xx unknown
- 1969-04-11 NO NO1488/69A patent/NO122441B/no unknown
- 1969-04-11 NL NL6905619A patent/NL6905619A/xx unknown
- 1969-04-14 FR FR6910813A patent/FR2014138B1/fr not_active Expired
- 1969-04-15 GB GB09143/69A patent/GB1271681A/en not_active Expired
- 1969-04-18 BE BE731748D patent/BE731748A/xx unknown
- 1969-05-19 US US833841A patent/US3588307A/en not_active Expired - Lifetime
- 1969-05-23 CH CH793969A patent/CH535527A/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL6905619A (no) | 1969-11-26 |
| DE1758394B2 (de) | 1976-01-08 |
| FR2014138B1 (no) | 1975-08-22 |
| US3588307A (en) | 1971-06-28 |
| BE731748A (no) | 1969-10-01 |
| GB1271681A (en) | 1972-04-26 |
| SE350983B (no) | 1972-11-13 |
| FR2014138A1 (no) | 1970-04-17 |
| CH535527A (de) | 1973-03-31 |
| LU58225A1 (no) | 1969-07-11 |
| ES365395A1 (es) | 1971-01-01 |
| DE1758394A1 (de) | 1971-01-28 |
| AT290868B (de) | 1971-06-25 |
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