SE447996B - Base electrode for light arc furnace - Google Patents

Base electrode for light arc furnace

Info

Publication number
SE447996B
SE447996B SE8203596A SE8203596A SE447996B SE 447996 B SE447996 B SE 447996B SE 8203596 A SE8203596 A SE 8203596A SE 8203596 A SE8203596 A SE 8203596A SE 447996 B SE447996 B SE 447996B
Authority
SE
Sweden
Prior art keywords
nozzles
furnace
oxygen
electrode
arc
Prior art date
Application number
SE8203596A
Other languages
Swedish (sv)
Other versions
SE8203596L (en
Inventor
S-E Stenkvist
B Widell
Original Assignee
Asea Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asea Ab filed Critical Asea Ab
Priority to SE8203596A priority Critical patent/SE447996B/en
Publication of SE8203596L publication Critical patent/SE8203596L/en
Publication of SE447996B publication Critical patent/SE447996B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08—Apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • 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
    • F27D27/00—Stirring devices for molten material

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

The direct current fed light-arc furnace is for direct reduction of metal oxides in powder form, such as iron, nickel, cobalt and/or oxides of metals within the iron group of the periodical system. The furnace comprises a container with at least one hollow electrode (2) connected as cathode, and at least one anode-connected bottom contact (4) or base electrode. In the bath periphery, in or at the furnace bottom and/or in one or more holes (7) in the base electrode (4) are fitted nozzles (6,8) for blowing gas into the smelt. One, or even all of the nozzles are formed as concentric oxygen units with water vapour or hydrocarbon gas blown in concentrically around the oxygen for protective purposes. (Provisional Basic advised week 84/06)

Description

447 996 Föreliggande uppfinning går ut på en lösning av dessa och andra härmed sammanhängande problem. Ugnen enligt uppfinningen kännetecknas därav, att 1 periferin av badet, i eller vid ugnens botten och/eller 1 ett eller flera bottenkontakter genomgående hål är anordnade en eller flera dysor för inblâsning av gas 1 smältan. Vid exempelvis förgasning av kol, koks eller skiffer på järnbad tillföras syre och/eller vattenånga i ugnens botten, och dessa kommer härvid effektivt in i järnbadet. Ugnen lämpar sig väl för gasproduktion (CO ev + H2). 447 996 The present invention is based on a solution of these and others herewith related problems. The furnace according to the invention is characterized therefrom, that 1 periphery of the bath, in or at the bottom of the oven and / or 1 a or several bottom contacts through holes are provided one or more nozzles for blowing gas into the melt. In the case of gasification of coal, coke, for example or slate in an iron bath, oxygen and / or water vapor are added to the furnace bottom, and these thereby enter efficiently into the iron bath. The oven is suitable well for gas production (CO ev + H2).

En ugn enligt uppfinningen är visad i bifogad figur. 1 är ett ugnsfat med minst en med genomgående kanal 3 försedd elektrod 2, kopplad som katod. En bottenelektrod eller bottenkontakt H är placerad i ugnens botten och är anodkopplad. (Likströmskällan är ej visad.) Elektroden år en grafit- eller kolelektrod.An oven according to the invention is shown in the attached figure. 1 is an oven dish with at least one electrode 2 provided with a continuous channel 3, connected as a cathode. A bottom electrode or bottom contact H is placed in the bottom of the oven and is anode connected. (The DC source is not shown.) The electrode is a graphite or carbon electrode.

Det för reduktion avsedda pulvret jämte reduktionsmedel tillföres genom kanalen 3, eventuellt medelst ejektorverkan för att förhindra att pulver går ut bakvägen genom kanalen 3.The powder intended for reduction together with reducing agent is fed through channel 3, possibly by ejector action to prevent powdering goes out the back road through the channel 3.

Ugnen eller konvertern är alltså försedd med en kol- eller grafitelektrod 2 med kanal eller hål för materialtillförsel och gasutsläpp 5.The furnace or converter is thus equipped with a carbon or graphite electrode 2 with duct or hole for material supply and gas emissions 5.

I botten av ugnsfatet (konverterfatet) 1 anordnas en eller flera dysor för gastillförsel i botten. Med hänsyn till omrörningen i smältan och för att undvika att gasformiga reaktorprodukter från botteninblåsningen ger utkok av skumslagg placeras dysorna i periferin av badet, under badytan 6. An- talet periferiska dysor 6 kan vara en eller flera, i det sistnämnda fallet placerade runt omkretsen. Eventuellt kan dysorna även utformas i neddopp- ningsrör eller -lansar.At the bottom of the oven dish (converter dish) 1, one or more nozzles are arranged gas supply at the bottom. With regard to the stirring in the melt and to avoid that gaseous reactor products from the bottom blowing boil out of foam slag, the nozzles are placed in the periphery of the bath, below the bath surface 6. An- the number of peripheral nozzles 6 may be one or more, in the latter case placed around the perimeter. Optionally, the nozzles can also be designed in immersion tubes or lances.

Alternativt eller som ett komplement utföres bottenelektroden med ett eller flera stora centrumhål 7, och i detta centrum placeras en eller flera cent- rumdysor 8.Alternatively or as a complement, the bottom electrode is made with a or several large center holes 7, and in this center one or more center room nozzles 8.

Bottenelektroden kan även vara utformad med plåtklädda tegel, och även här kan urtag göras för periferi- 6 och centrumdysor 8. Ett problem har tidi- ugare varit att bottenelektroden/bottenkontakten varit skrymmande och upp- tagit plats 1 botten, men här har dessa problem lösts.The bottom electrode can also be designed with sheet metal bricks, and also here recesses can be made for peripheral 6 and center nozzles 8. A problem has has been that the bottom electrode / bottom contact has been bulky and took place 1 bottom, but here these problems have been solved.

' 'IJ'' IJ

Claims (2)

n, Q \ 447 996 Dysorna (6, 8) eller vissa av dessa kan utformas som koncentriska syrgas- eller vattenångedysor med koncentrisk tillförsel av skyddsgas i form av vattenånga eller kolväte (gasol). Som exempel på process kan nämnas förgasning av kol, koks, skiffer på järn- bad, varvid syre och/eller vattenånga tillföres i botten. Vid gastillförseln erhålles god omröring i badet (se pilarna 9). I ugnen sker avkolning och gasalstring och CO + ev H2 avgår i utloppet 5. Anordningen enligt ovan kan varieras på mångahanda sätt inom ramen för nedanstående patentkrav. PATENTKRAVn, Q \ 447 996 The nozzles (6, 8) or some of these can be designed as concentric oxygen or water vapor nozzles with a concentric supply of shielding gas in the form of water vapor or hydrocarbon (LPG). Examples of processes include gasification of coal, coke, slate in iron baths, whereby oxygen and / or water vapor are added to the bottom. With the gas supply, good stirring is obtained in the bath (see arrows 9). The furnace is decarburised and gas generated and CO + or H2 is emitted in the outlet 5. The device as above can be varied in many ways within the framework of the following claims. PATENT REQUIREMENTS 1. Likströmsmatad ljusbågsugn för direktreduktion av metalloxider i pulverform, såsom Åärnoxid, nickel-, kobolt- och/eller oxider av metaller inom järnets grupp av det periodiska systemet, eller dylika oxider inne- hållande material, såsom järnmalmsslig, samt för gasalstring, vilken ugn innefattar en behållare med en ihålig ljusbågselektrod (2), med central kanal (3) för tillförsel av pulverformigt material till ljusbågenlsmältan, vilken elektrod är kopplad som katod, och minst en bottenkontakt (N), 1 elektrisk kontakt med smältan-och anodiskt kopplad, varigenom en ljusbåge är anordnad att bildas mellan elektrod (2) och smälta, k ä n n e - t e c k n a d därav, att i periferin av badet (6), 1 eller vid ugnens botten och/eller i ett eller flera bottenkontakter (4) genomgående hål (7) är anordnade en eller flera dysor (6, 8) för inblåsning av gas i smältan.1. DC-fed arc furnace for direct reduction of metal oxides in powder form, such as iron oxide, nickel, cobalt and / or oxides of metals within the group of the iron of the Periodic Table, or such oxides containing materials, such as iron ore, and for gas generation, which furnace comprises a container with a hollow arc electrode (2), with central channel (3) for supplying powdery material to the arc melt, which electrode is connected as a cathode, and at least one bottom contact (N), 1 electrical contact with the melt and anodically connected, whereby an arc is arranged to be formed between the electrode (2) and the melt, characterized in that through the hole (6), 1 or at the bottom of the furnace and / or in one or more bottom contacts (4) through holes ( 7) one or more nozzles (6, 8) are provided for blowing gas into the melt. 2. Ljusbågsugn enligt patentkrav 1, k ä n n e t e c k n a d därav, att minst en av dysorna, eventuellt alla, är utformade som koncentriska syrgas- dysor med vattenånga eller kolväte (gasol) inblåst koncentriskt kring syr- gasen såsom skyddsgas. :n-2. An arc furnace according to claim 1, characterized in that at least one of the nozzles, possibly all, is designed as concentric oxygen nozzles with water vapor or hydrocarbon (LPG) blown concentrically around the oxygen as shielding gas. : n-
SE8203596A 1982-06-10 1982-06-10 Base electrode for light arc furnace SE447996B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8203596A SE447996B (en) 1982-06-10 1982-06-10 Base electrode for light arc furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8203596A SE447996B (en) 1982-06-10 1982-06-10 Base electrode for light arc furnace

Publications (2)

Publication Number Publication Date
SE8203596L SE8203596L (en) 1983-12-11
SE447996B true SE447996B (en) 1987-01-12

Family

ID=20347034

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8203596A SE447996B (en) 1982-06-10 1982-06-10 Base electrode for light arc furnace

Country Status (1)

Country Link
SE (1) SE447996B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0643147A2 (en) * 1993-08-30 1995-03-15 Mintek The production of ferronickel from nickel containing laterite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0643147A2 (en) * 1993-08-30 1995-03-15 Mintek The production of ferronickel from nickel containing laterite
EP0643147A3 (en) * 1993-08-30 1995-05-03 Mintek The production of ferronickel from nickel containing laterite.

Also Published As

Publication number Publication date
SE8203596L (en) 1983-12-11

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