SE439567B - Direct-current - electric arc furnace or shank - Google Patents
Direct-current - electric arc furnace or shankInfo
- Publication number
- SE439567B SE439567B SE8305683A SE8305683A SE439567B SE 439567 B SE439567 B SE 439567B SE 8305683 A SE8305683 A SE 8305683A SE 8305683 A SE8305683 A SE 8305683A SE 439567 B SE439567 B SE 439567B
- Authority
- SE
- Sweden
- Prior art keywords
- oven
- ladle
- shank
- layer
- bottom contact
- Prior art date
Links
- 238000010891 electric arc Methods 0.000 title abstract 2
- 239000011449 brick Substances 0.000 claims abstract description 22
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000004927 clay Substances 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010792 warming Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 3
- 235000014380 magnesium carbonate Nutrition 0.000 description 3
- 239000001095 magnesium carbonate Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 240000005589 Calophyllum inophyllum Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0036—Linings or walls comprising means for supporting electric resistances in the furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Discharge Heating (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
15 20 25 , 30 8305683-8 Föreliggande uppfinning utgör en komplettering av denna ansökans föremål, där skiktet närmast smältan kan vara annorledes utformat, men samma tek- niska effekt uppnås. 15 20 25 , 30 8305683-8 The present invention is a supplement to the subject matter of this application, where the layer closest to the melt may be differently shaped, but the same effect is achieved.
Föreliggande uppfinning kännetecknas därav, att ugns- eller skänkbotten och även ugns- eller skänksidornas nedersta delar består av stampmassa eller elektriskt icke-ledande tegel, omväxlande med skiktet genomgående elektriskt ledande stift stänger eller plåtar, resp elektriskt ledande tegel, varvid en botten och sidornas nedre del omfattande bottenkontaktdel erhålles.The present invention is characterized in that the oven or ladle bottom and also the lower parts of the oven or sideboard sides consist of stamping compound or electrically non-conductive bricks, alternating with the layer through electrically conductive pins rods or plates, respectively electrically conductive bricks, wherein a the bottom and the lower part of the sides comprising the bottom contact part are obtained.
Man får genom denna anordning en ugn eller skänk, vilken kan kompletteras med en eller flera elektromagnetiska omrörare, vilkas fält i huvudsak ej påverkas av bottenkontakten. Denna eller dessa omrörare kan lämpligen pla- ceras vid sidan av skänken/ugnen.You get an oven or sideboard through this device, which can be supplemented with one or more electromagnetic stirrers, the fields of which are essentially non-existent affected by the bottom contact. This or these stirrers can suitably be placed ceras next to the sideboard / oven.
Ugnen eller skänken enligt uppfinningen är närmare exemplifierad i bifogad figur, som visar en skänk (eller ugn) med minst en ljusbågselektrod 12, katodiskt ansluten till en likströmskälla (ej visad). Ugnen/skänken kan an- vändas för alla sorts metaller eller legeringar inkl stål.The oven or ladle according to the invention is further exemplified in the accompanying figure, showing a ladle (or oven) with at least one arc electrode 12, cathodically connected to a DC power source (not shown). The oven / sideboard can be used for all types of metals or alloys including steel.
Skikt 1, direkt under smältan 13, består av elektriskt ledande tegel, såsom magnesit-grafit, omväxlande med icke ledande tegel. I detta skikt erhålles god elektrisk ledning och samtidigt god värmeisolation. Skiktet 1 kan även bestå av stampmassa, elektriskt icke-ledande, och försett med skiktet genom- gående stift eller plåtar 14 för ledande av elektrisk ström, dvs helt enligt nyssnämnda patentansökan.Layer 1, directly below the melt 13, consists of electrically conductive bricks, such as magnesite-graphite, alternating with non-conductive bricks. In this layer is obtained good electrical conductivity and at the same time good thermal insulation. Layer 1 can also consist of stamping compound, electrically non-conductive, and provided with the layer walking pins or plates 14 for conducting electric current, i.e. completely according to the just mentioned patent application.
Vid ugnens eller skänkens sidor anordnas elektriskt ledande, ev plåtfodrade tegel 2, vilket skikt även kan ha den för skikt 1 angivna sammanställningen.Electrically conductive, possibly sheet-lined, are arranged at the sides of the oven or sideboard brick 2, which layer can also have the composition specified for layer 1.
Eventuell; kan för skikt; 2 tegel med stålplåiar användes, nen dess-a sidøskikf ingå tillsammans med.skikt 1 i bottenkontakten.Eventual; can for layers; 2 bricks with steel sheets were used, nen dess-a sidøskikf included together with layer 1 in the bottom contact.
Under skikt 1 anordnas en stålplåt 3 med svetsade stålstift, -stänger eller plåtar 1U, genomgående skiktet 1. Hela bottenkontaktdelen 3 kan vara förtill- verknd och utformad som en cylindrisk plåtform, försedd mßd faßtßvßtßfldv stift, stänger eller plåtar 14. Mellan dessa stift, stänger eller plåtar kan sedan elektriskt oledande stampmassa instampas på sedvanligt sätt. I den cylindriska plåtformen ingår sidodelarna 2, täckande de nedersta delarna av skänkens/ugnens insida. Bakom sídodelapna 2 är anordnat ett värmeisolerande af' Poon eUALITY J» fiï?..“ fif šf, « 15 20 szossss-a och elektriskt icke ledande skikt 8 av torrstampad magnesitmassa eller dy- likt, och bakom detta skikt ett värmeisolerande och elektriskt icke-ledande skikt Y av chamottetegel eller dylikt. Under bottendelen 1 kan placeras ett andra skikt 4, bestående av elektriskt ledande tegel, såsom magnesit-gra- fittegel, koltegel eller grafíttegel, eller också plåtfodrat tegel.Under layer 1, a steel plate 3 is arranged with welded steel pins, rods or plates 1U, through the layer 1. The entire bottom contact part 3 can be prefabricated. verknd and designed as a cylindrical plate shape, fitted with fßtßvßtß fl dv pins, rods or plates 14. Between these pins, rods or plates can then electrically non-conductive stamping compound is stamped in the usual manner. In it the cylindrical plate shape includes the side parts 2, covering the lower parts of the inside of the sideboard / oven. A thermal insulator is arranged behind the side partitions 2 of ' Poon eUALITY J » fi ï? .. “ fi f šf, « 15 20 szossss-a and electrically non-conductive layer 8 of dry-stamped magnesite pulp or dyed similar, and behind this layer a heat-insulating and electrically non-conductive layer Y of chamotte bricks or the like. Under the bottom part 1 can be placed one second layer 4, consisting of electrically conductive bricks, such as magnesite fitt brick, coal brick or graphite brick, or also sheet metal lined brick.
Under detta skikt placeras ett vanligtvis tjockare skikt 5 av elektriskt oledande tegel, såsom exempelvis chamotte, blandat med elektriskt ledande tegel, såsom magnesit-grafit eller grafittegel . Skiktet 5 måste kunna leda ström. Under detta skikt 5 placeras eventuellt ett nytt skikt U av ledande tegel, likt nyssnämnda skikt U. Undet detta skikt H eller i kontakt med skikt 5 placeras kopparplattor 6 eller andra elektriskt ledande till en terminal 9, såsom en kopparterminal 9. Denna är lämpligen anodiskt ansluten.Below this layer is placed a usually thicker layer 5 of electrically non-conductive bricks, such as chamotte, mixed with electrically conductive bricks, such as magnesite graphite or graphite bricks. Layer 5 must be able to conduct Current. Below this layer 5, a new layer U of conductive may be placed bricks, similar to the aforementioned layer U. Under this layer H or in contact with layer 5, copper plates 6 or other electrically conductive are placed into one terminal 9, such as a copper terminal 9. This is suitably anodically connected.
Skänken är försedd med ett metalliskt hölje 10.The sideboard is provided with a metallic casing 10.
Centralt i botten av skänken/ugnen är placerat ett tapphål, försett med ventil- eller stopparorgan 11, avsett för skänkens/ugnens tappning. I skikt 5 kan även oledande tegel förses med ledande plåtmellanlägg, exempel- vis enligt tidigare nämnd patentansökan.Centrally at the bottom of the sideboard / oven is placed a tap hole, provided with valve or stopper means 11, intended for draining the ladle / oven. IN layer 5, non-conductive bricks can also be provided with conductive sheet metal spacers, for example according to the previously mentioned patent application.
Genom utformningen av bottenkontaktdelen 1-2-IM, försedd med bottenplattan 3, medges plats i eller vid sidan av skänken/ugnen för en eller flera elektromagnetiska omröare 15. Dessas flöden påverkas ej av bottenkontakt- delarna och sedvanlig omröring kan ske av smältan 13, exempelvis i raffi- nerings-, reducerings- och/eller homogeniseringssyfte. Bottenkontaktdelen kan alltså hållas fri från magnetfält.Through the design of the bottom contact part 1-2-IM, provided with the bottom plate 3, space is allowed in or next to the sideboard / oven for one or more electromagnetic agitators 15. Their flows are not affected by the ground contact the parts and customary stirring can take place of the melt 13, for example in purpose of reduction, reduction and / or homogenization. Bottom contact part can thus be kept free from magnetic fields.
Ugns/skänkbottnen kan utföras rak, som i det visade fallet, eller välvd, men med uppåtsträckande sidokanter.The oven / sideboard bottom can be made straight, as in the case shown, or arched, but with upwardly extending side edges.
Uppfinningen kan varieras på mångahanda sätt inom ramen för nedanstående patentkrav.The invention can be varied in many ways within the scope of the following patent claims.
PQ@Rfï¿&UTY , IPQ @ Rfï¿ & UTY , I
Claims (4)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8305683A SE439567B (en) | 1983-10-17 | 1983-10-17 | Direct-current - electric arc furnace or shank |
DE3413745A DE3413745C2 (en) | 1983-04-21 | 1984-04-12 | DC arc furnace |
US06/275,377 US4541099A (en) | 1983-04-21 | 1984-04-17 | DC Arc furnace improved hearth construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8305683A SE439567B (en) | 1983-10-17 | 1983-10-17 | Direct-current - electric arc furnace or shank |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8305683D0 SE8305683D0 (en) | 1983-10-17 |
SE8305683L SE8305683L (en) | 1985-04-18 |
SE439567B true SE439567B (en) | 1985-06-17 |
Family
ID=20352919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8305683A SE439567B (en) | 1983-04-21 | 1983-10-17 | Direct-current - electric arc furnace or shank |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE439567B (en) |
-
1983
- 1983-10-17 SE SE8305683A patent/SE439567B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8305683D0 (en) | 1983-10-17 |
SE8305683L (en) | 1985-04-18 |
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NUG | Patent has lapsed |
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