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)
- Application Of Or Painting With Fluid Materials (AREA)
- Sealing Devices (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Description
Hulelektrode av grafitt. Graphite hollow electrode.
Det er kjent i elektrotermi, spesielt ved elektrostål-fremstilling, å anvende hul- eller vekeelektroder, da elektrodeendenes ringformede utformning stabiliserer lysbuen. It is known in electrothermy, especially in the manufacture of electric steel, to use hollow or wick electrodes, as the ring-shaped design of the electrode ends stabilizes the arc.
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. It is also known that when introducing ionizing gases, e.g. argon, nitrogen and the like, a stabilization increase occurs, and thereby the arc's burning conditions are significantly improved in so far as the thermal efficiency increases, an adverse effect on the power grid is reduced and, above all, the life of the refractory lining is extended, which greatly burdens the electrical steel's costs.
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. Due to the manufacture of the electrodes, a certain porosity occurs through the entire structure of the electrode due to the splitting of the binder, through which part of the gas supplied under a certain pressure wanders away and is lost and is thus no longer available to the electrodes' burners for the arc stabilization.
Da de anvendte gasser, som f.eks. argon, er dyre, When they used gases, such as e.g. argon, are expensive,
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. these gas losses have been suppressed by making the cavity's surface gas-tight with coking substances such as "pitch" etc. as well as synthetic resin, sugar solution, water glass solution or the like.
Hulelektrodens indre flate blir spesielt virksom ugjennomtrengelig ved dannelse av pyrolytisk karbon fra gassfasen. The inner surface of the hollow electrode becomes particularly effectively impermeable when pyrolytic carbon is formed from the gas phase.
Ved hulelektroden ifølge oppfinnelsen er det til de -forkoksbare stoffer satt lysbuestabiliserende stoffer, eksempelvis KBFjij, K2SO^, WC, TiC. In the case of the hollow electrode according to the invention, arc stabilizing substances, for example KBFjij, K2SO^, WC, TiC, have been added to the pre-coking substances.
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. During trials, it was established that with this addition, which is simple to manufacture, the burner ratio is influenced favorably. Of course, corresponding ionizing substances with correspondingly equal or better effects can also be used.
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. With the hollow electrode according to the invention, not only is argon loss etc. avoided, but at the same time an additional arc stabilization effect is also achieved which is of particular importance with regard to the effect on the power grid and the lifetime of the arc furnace's refractory lining.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681758394 DE1758394C3 (en) | 1968-05-24 | Hollow electrode made of carbon or graphite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO122441B true NO122441B (en) | 1971-06-28 |
Family
ID=5695010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO1488/69A NO122441B (en) | 1968-05-24 | 1969-04-11 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3588307A (en) |
| AT (1) | AT290868B (en) |
| BE (1) | BE731748A (en) |
| CH (1) | CH535527A (en) |
| ES (1) | ES365395A1 (en) |
| FR (1) | FR2014138B1 (en) |
| GB (1) | GB1271681A (en) |
| LU (1) | LU58225A1 (en) |
| NL (1) | NL6905619A (en) |
| NO (1) | NO122441B (en) |
| SE (1) | SE350983B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513425A (en) * | 1983-07-15 | 1985-04-23 | Great Lakes Carbon Corporation | Composite electrode for arc furnace |
| US4490824A (en) * | 1983-07-15 | 1984-12-25 | 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/en not_active IP Right Cessation
- 1969-03-28 ES ES365395A patent/ES365395A1/en not_active Expired
- 1969-03-31 SE SE04545/69A patent/SE350983B/xx unknown
- 1969-04-11 NL NL6905619A patent/NL6905619A/xx unknown
- 1969-04-11 NO NO1488/69A patent/NO122441B/no 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/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| LU58225A1 (en) | 1969-07-11 |
| FR2014138B1 (en) | 1975-08-22 |
| NL6905619A (en) | 1969-11-26 |
| CH535527A (en) | 1973-03-31 |
| AT290868B (en) | 1971-06-25 |
| FR2014138A1 (en) | 1970-04-17 |
| SE350983B (en) | 1972-11-13 |
| US3588307A (en) | 1971-06-28 |
| ES365395A1 (en) | 1971-01-01 |
| DE1758394B2 (en) | 1976-01-08 |
| GB1271681A (en) | 1972-04-26 |
| BE731748A (en) | 1969-10-01 |
| DE1758394A1 (en) | 1971-01-28 |
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