US1833739A - Furnace tapping device - Google Patents

Furnace tapping device Download PDF

Info

Publication number
US1833739A
US1833739A US490762A US49076230A US1833739A US 1833739 A US1833739 A US 1833739A US 490762 A US490762 A US 490762A US 49076230 A US49076230 A US 49076230A US 1833739 A US1833739 A US 1833739A
Authority
US
United States
Prior art keywords
furnace
plug
orifice
tapping
cooling
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
Application number
US490762A
Inventor
Davis Neville Ryland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US1833739A publication Critical patent/US1833739A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment

Definitions

  • My invention relatesto furnace tappingfde-l vices, more particularly to furnace tapping devices Which are intended to beused at'or l near the bottom ofalfurnacdand has for its 15J object the'provisionbf an improved device of-this character;V
  • themelting furnace has an orifice at the'pla'ce l ⁇ 4or (':rucible Vl0 yvvliich is made; of any s Amlole', ⁇ s refractory fmat'erial, ⁇ and; Vanj"outer. ⁇ liningvlu which maybe madeof'refraotory brick ⁇ lsand'or'a'ny suitable'materials such asare' ⁇ i WhereI it VVis [desired the furnace should he. "101 tappedand altWo-part plug is provided,v one part forming the end thereof "being adapted to lit substantially the tapping soup; and other part being arranged so that acircula- 15 through or therearound.” y
  • the nozzle is I fornf'ledvvith a Atapered ⁇ opening 'therethrough ,to accommodate;
  • n 1 is c formed in 'two arts, asol'id ⁇ p art* 116, lyvlich closes the nnerportionof thetapping orifice 17@ and vvhichpijeferablyis formed 'of' Ina-1, fi" i il be i 1 terialsimilar'to -themetal to be melted,
  • wThet'apping device comprisesaplugvvliich 'i arqa-per o' Y V'Vllren'it is desired to tapthe furnae.
  • the 'waterl circulation 1 isf stopped v and the ⁇ heat l I from the: molten Charge ⁇ is communicated through'the solid portion lof 'theplug to .the j oint- @19 j and melts the Solder, whereupon--, @"fhe'hellw parte-18' of the-Plueian @With-...v g drawnand after an intervaloftime tli eleolidv 1 part 16 and the buttonofjsol-idied metal; 'around it will he; melted bytheheatfofe the 1 'i vcharge and'ztheifurnace will emptythrough @edifice-17, zrhefsoiidrporuon of the plug willhe absorbed, in-andvcome' away with
  • Some kcases solderingat thefjoint 19, may be Vdispensediwithif suliciently goed there mally conductive contactis maintained bei; Y tween-thejtwo parte of the;plugfjtoenalole a fpriloer.; ⁇ cooling. of the solidpartrl Y toitakei f portionlas that'ther-metalSurrounding;Said
  • solderedjoint'when employed must not melt 1 i* Vwhilebeing', cooled, ⁇ consequentlytlie-e'ooling f must be capable ofremovingy heat .at.ja 'coneideralole rate; that iS,r the'cooling he eX-...1 ceedingl'y effective andthe coolmglluidmust heable'to diesip'ateja considerable amount fojf energy.
  • vGn theother handy the'inner portionf of.
  • the plug must not betoo longfotherwiseff whenV the cooling is' Stoppedf the time taken I Itoy-meltthev plug before .teeming oanjtak'e place would be excessiveand'occasiona greatVIV wastefof time.
  • Saidorifice y comprising a portion arrangedto t close saidl orificer and projected-intol-Sald; lfurj nace andineans for. bringing a cooling ⁇ ⁇ -medium into Contactv withjsaid-oriiieeelosingf orifice and means' forcooling'said-'membe oi 12e Y y died condition as long as said portionris cooled but is melted when' said cooling medium ⁇ is removed.
  • a melting furnace comprising, walls ⁇ having a tapping yorifice therein, a member substantially closing Said ⁇ orifice, a second member,binder metal having a lowerineltf n ing point than said first member between said cooling said V:sfecond member.
  • Va "melting furnace provided with walls having a' tapping orificetherein, of a plug for said orifice oomprising a substantially solidV metallic portion lpositioned in said orifice so as to substantially close Ait and a second metallic portion.
  • said second portion having a conduit therein through which a cooling medium can be circulated, whereby that portion of the furnace'charge in contact with eaidfirstV A portion is maintained in a solid state.
  • a furnace comprising walls having'a tapping orifice therein and a tapping devicey for closing-said orifice comprising afplug-V having a substantially solid portion adapted 'to be tted into said orifice so as to substantially close said orifice, a tubular portion detachably connected to said solidportion in good thermal relation therewith andvineansl for circulating a cooling fluid 'through Said tubular portion.
  • a melting for closing said orifice,'saidplug having la 8.
  • a metal melting: furnace comprising 'wallshaving an aperture therein, a nozzle inV l said aperture, a heatrefractory materlalin said nozzle forming i an V'orifice ,therethrough and a plug for closing Saidorificercomprising a substantially solid'metallic portion arranged to be fitted in the inner end of said orifice soas to substantially closesaid innerv Y end, ⁇ 1atubular ⁇ member secured to 'said Solid n,
  • aperture comprising a plug-like"member arranged in said aperture soasto substantiallyV g lclose Said aperture andV having a substantial portion,.projecting.- ⁇ into said furnace, land L means for cooling saidfplug-lilemembereoy that the metal "surroundingfeaid proj ecting A portion: is maintained .in a solidified vcondi tion while saidmember is. ⁇ cooled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

Nov 24, 1931. N. Rin-Avls 1,833,739
FURNACE TAPPING DEVICE Filed oct. 23. 1930 Inventor'.
Neville R. Davis.
im www@ .His Abb orng.
NEvIILE LEYLAND D My invention relatesto furnace tappingfde-l vices, more particularly to furnace tapping devices Which are intended to beused at'or l near the bottom ofalfurnacdand has for its 15J object the'provisionbf an improved device of-this character;V
According toV one formioffmyinvention" themelting furnacehas an orifice at the'pla'ce l` 4or (':rucible Vl0 yvvliich is made; of any s uitalole',` s refractory fmat'erial,` and; Vanj"outer.` liningvlu which maybe madeof'refraotory brick` lsand'or'a'ny suitable'materials such asare'` i WhereI it VVis [desired the furnace should he. "101 tappedand altWo-part plug is provided,v one part forming the end thereof "being adapted to lit substantially the tapping orice; and other part being arranged so that acircula- 15 through or therearound." y
v The tW-o parts of the plug tained in clo'se contact or are 'detach'aloly` connected by a joint, asolderedjointfor eX- ample, so that a sufficiently good heatcon ducting path is formed to preventthe solid partof the plug `from `melting' so--longfasthe cooling hcirculationis kmaintained about the otherwpart.A When theplugis in position'in the tapping orifice the solid portion being 25 cooled will prevent leakage of metal around? the plug by solidifyingg;V the molten` metal Where the tvvo parts are soldered together the joint Will `melt when the coolingcirculation has ceas'ed. "After a certain intervalof time'v depending upon thesi'ze of the fsolid portion` and the'material ofZvVhiCh itis made this portion will be melted jby-'the moltenfV metal above and Ithe furnacefis :poured:V After fthe; furnacehas `heen pouredthe fluid cooled porV .tion of the plugmay be provided' with? a fresh solid part and inserted inthe tapp'ing'orice from the outside of the Afurnace,' Which is' then ready for a fresh-charge@ l f 1 'l means `which the cooled' portion may be inserted in thetapping orifice and in some f Cases may not be attCh-d t0 the solid part O ftheplug'. l r- 50 For a more complete understandingoflmy.
invention'rreferenceishouldbehadto the aicf i i 0 When it is desired to pour thefurnaoe the` coolingv ifluid, ff water "forfexamplgg A Thejfluid cooled part offthe plug forms the coolingfluid. .1 v The inner end ofthe tapping oriliceflmay AvIs,' oF sLE,.;ENenAND,i Assieivon; rro tenana:aanyk uniroma1@ conf-'l '3f H 'companying drawing in which"thesingle" ure illustratesin` vertical section'ftheh( i'fiv'forr'r` A portionofametal melting furnaceproyided l the furnace Walls coin-prise an innerlining used inthe Aconstruction of melting An outer casing 12 is provided ifor the Vflg'irnna'cel hemadeofjmetal Vplateyor straps. #Acompaifa' tivelyflargevapertureg`indieatedat 13,Fis pro Y i vided in the furnace `lining and brick bottom,"
formed"offfire` clay,V or Vsome suitable [similar `materialand supportedby'the casing l2lafs' shown.'A The nozzle" is I fornf'ledvvith a Atapered` opening 'therethrough ,to accommodate; the
Vloe-"off"gannisterior silica,"orlotlier materialfs,
suitahl'forthe purpose@f n 1 is c formed in 'two arts, asol'id` p art* 116, lyvlich closes the nnerportionof thetapping orifice 17@ and vvhichpijeferablyis formed 'of' Ina-1, fi" i il be i 1 terialsimilar'to -themetal to be melted,
f a.V Vsoldered joint Slis Aprovided"fvvitlijy l 'nwinternal'tuhe 201 so that'fa` cirou'l maintained; in a'vvellflnovvnfinanfner t drawing indicate the directionfofr'mo'tio `of be aredfasshovvn so as toaffo'rd aneas'ypath,
f or the meltedcharge'tojflovvoutyvvlien y furnace'i's bei/ngi'poured.;l The entirefurnaeeglog 1;
wThet'apping device comprisesaplugvvliich 'i arqa-per o' Y V'Vllren'it is desired to tapthe furnae., the 'waterl circulation 1 isf stopped v and the` heat l I from the: molten Charge \is communicated through'the solid portion lof 'theplug to .the j oint- @19 j and melts the Solder, whereupon--, @"fhe'hellw parte-18' of the-Plueian @With-...v g drawnand after an intervaloftime tli eleolidv 1 part 16 and the buttonofjsol-idied metal; 'around it will he; melted bytheheatfofe the 1 'i vcharge and'ztheifurnace will emptythrough @edifice-17, zrhefsoiidrporuon of the plug willhe absorbed, in-andvcome' away with'the l f tions'a's fall within the tfr'ueepirit andgscope 1's raised a convenient. distancej'from thief 'n t somecases besuiicientto circulate air-ora` ground` on feet (not shown), or is supported 1n a framework or cradle V(not shown), so-A that sulicient room is afforded Vloelow the botltom to admit of manipulation of the plug" and also topermit a mould oroonduitto be placed? in vposition into Vwhich thef VY'nfelt'e'df chargefeanflow when the furnace is tapped. L' In preparing` the furnace for operation',
oharge is melted willfbe 'smallf furnace having been ,chargedY` with material, coolingwater is circulated V.through the lower" tuhular/'portion 18 ofthe plugfrom any suitable.v` S1`116ean` 0Wng fw' theeood theme11 @0111 fn* ductivity between this lowerpart of `thleplug` anidits solid part 16,thes`o1id portionwillbe ,g maintained eool- Vevenf aftenjthe furnace hargehas melted.v .Usually it will-heffound that asfthe charge'melts andi runsdown intoy the-fportion vofthe orifice immediately surif Y roundingfthesolid vpart 16 ofthe-plug'itwillj` solidifyby reasonofthe coolingeffeetofisaid VV'cha1 "ge. i Y v '5 J- fDuringthepouring it Vgenerally happens 'f that partioff. the` :lining-V 15 f '=the,aperture inthe-nozzle is carried-away by theistreamof molten; metal.: The-f nozzle',` heweveitg,` ,will generally lasjt f for; `seiejralmelts',V but, may', Ogf q course,{ be replaced atgjany timey AVand -particILi-vv flarly :whenfijrelining thev furnace. Theflower vonhollow-fpara 18 of the plug-mayv beusedf solidzportion and 4willform a buttonewhi'eh I pinge.
willeffeetually seal. the orifcelf?. -lff Y MOH-'16' andtheplug reinsert'ed when prepare 1 ing.'thefu'rnaee'for-afreshcharge.
' n Some kcases solderingat thefjoint 19, may be Vdispensediwithif suliciently goed there mally conductive contactis maintained bei; Y tween-thejtwo parte of the;plugfjtoenalole a fpriloer.;` cooling. of the solidpartrl Y toitakei f portionlas that'ther-metalSurrounding;Said
projecting portion (is maintained. alsoli'dil Q the; tWO-partplugf is :inserted invthe tapered i f )peningfin `the 'nozzle, and gannister oiigsilica or other material indicated at 1K5vv isrammed t Vftherearound'so, as to retain-itin'p'oeitionil'frv Inv 'general the plug, will only he required to j be held in :position Y during theY charging into I: .the furnace of the material tolse melted,-and
Y owing tothe comparativelywsmall area ofthe fp lug' the weight tending to 'force'. it outfof the orifice f before the', bottom part of the,
byLettefs- Pteritfof'theQUnitd Stengel 2;1. Y;A- tapping devicey for a melting-funn ce provided withgfan'oriice therein; Comprising throughthe lowerpartiofdthefplugit may I coolinggae through lsaid part, the Velocity- *y L "gliele is desirable in' nl aeefumfwhn it is determined to.. tap :the-furnace aN rapid Structed to enable this to A loe effected. `VIn designing' the plug,fthereforegjthe fol- Yehangein'thetemperature ofthe plugshall 'f Vtake :place-when theV cooling'fis'H discontinued Soit-hat thegcool'edgportin maybev removed p "y and-the furnace teemed with as little loss-0f' timeasl'afssilole,V theplug ispreferably conlowing pointeshouldbe bornein mind. The
solderedjoint'when employed must not melt 1 i* Vwhilebeing', cooled,` consequentlytlie-e'ooling f must be capable ofremovingy heat .at.ja 'coneideralole rate; that iS,r the'cooling he eX-...1 ceedingl'y effective andthe coolmglluidmust heable'to diesip'ateja considerable amount fojf energy. vGn :theother handy the'inner portionf of. the plug must not betoo longfotherwiseff whenV the cooling is' Stoppedf the time taken I Itoy-meltthev plug before .teeming oanjtak'e place would be excessiveand'occasiona greatVIV wastefof time. Itis clear,therefore, that-the; j rate of-removalof energybythecooling sys-- tem isyery important, andi-Very effective ofthe comparatively small areaof the plug available oirkwhichthe 'cooling fluidk eaniln` Y n The invention yery euitahleffor `use electric furnaces Ip'articularly of the induc- -tiontype,and in'euchcases theplug may ad-'' y vantageouslyloev connected to earth for the 1 purpose; of earthing t the Acharge las bythe numeral 22 inthe drawing.
3,6 E i cooling must beg-employed especially in yiew ment of myinventiomiit willloe unders'toodf Y made,V` and 'L the'reforej,V contemplate 'by the appendedclaims tolcov'er anyeuch modifi'ea-l f metallicplugmember adapted to closegs,
as to 4Vmaintain vvthe fur-nace {charge-'adj ac ent videdwith a tapping orieeg ofj a iplugffor,
Saidorifice ycomprising a portion arrangedto t close saidl orificer and projected-intol-Sald; lfurj nace andineans for. bringing a cooling` `-medium into Contactv withjsaid-oriiieeelosingf orifice and means' forcooling'said-'membe oi 12e Y y died condition as long as said portionris cooled but is melted when' said cooling medium` is removed.
3. A melting furnace. comprising, walls` having a tapping yorifice therein, a member substantially closing Said` orifice, a second member,binder metal having a lowerineltf n ing point than said first member between said cooling said V:sfecond member.
4. The combinationfwnh ,first and said secondmembers, and means for:-`
Va "melting furnace provided with walls having a' tapping orificetherein, of a plug for said orifice oomprising a substantially solidV metallic portion lpositioned in said orifice so as to substantially close Ait and a second metallic portion.,
in heat conducting relation with Ysaid 4first portion, said second portion having a conduit therein through which a cooling medium can be circulated, whereby that portion of the furnace'charge in contact with eaidfirstV A portion is maintained in a solid state.
p f' from a material similar tothemetal to be 4 melted .and means forlcirculatmg afcoolmg medium to cool said lplug-hire` membe'rf-so" 5. A furnace comprising walls having'a tapping orifice therein and a tapping devicey for closing-said orifice comprising afplug-V having a substantially solid portion adapted 'to be tted into said orifice so as to substantially close said orifice, a tubular portion detachably connected to said solidportion in good thermal relation therewith andvineansl for circulating a cooling fluid 'through Said tubular portion.
6. The combinationwith aV metal melting furnace having walls provided with` a tap` ping vorifice therein, of a tapping device for closing said orifice comprisinga plug-like member,said plug-like member being formed that that portion of the furnace` charge` in contact with said member is maintained in a] solidlfiedcondltion asvlong as said memn ber is cooled but is vmeltedf and with `itsaid medium is stopped.` 4 p p.
` ,having a tapping orificetherein, and@J plug* plug when the circulation of Saidfcooling 7. A melting for closing said orifice,'saidplug having la 8. A metal melting: furnace comprising 'wallshaving an aperture therein, a nozzle inV l said aperture, a heatrefractory materlalin said nozzle forming i an V'orifice ,therethrough and a plug for closing Saidorificercomprising a substantially solid'metallic portion arranged to be fitted in the inner end of said orifice soas to substantially closesaid innerv Y end,`1atubular `member secured to 'said Solid n,
11. The combination withfa metal melting furnace `providedwith walls` having a tap-1 Y cooled. Vl .Y
In witnessfwhereof, I have hereunto lset Y myhandthis thirteenth-day of October,p1930.' f i *,NEVILLEBXLAND'DAVIS. j
portion andprojectingfoutwardlyvfromeaid; Y orifice, a second tubularmember `within-said e w first tubular member forfoonveying apfluid f medium therethrough, and means providingf for [the passageV of `said ,fluidmedium from `aaidfirst tubular member. 'l L furnace comprising' 5' 9. UA metal melting WallaprovidedHwith` a'` nozzlevlike/apferture 1f f therein anda tappingdevicef forclosingsaidf.
aperture comprising a plug-like"member arranged in said aperture soasto substantiallyV g lclose Said aperture andV having a substantial portion,.projecting.-` into said furnace, land L means for cooling saidfplug-lilemembereoy that the metal "surroundingfeaid proj ecting A portion: is maintained .in a solidified vcondi tion while saidmember is.` cooled.
r 10. The combination'with p 4 p metal'"melt-jf."A c I ing furnace having walls'` provided with a'l tapping oric'e therein of a tapping'clevice'lgig, 1 i
for saiclvorifice comprising-.a plug adapted ,j
tobe inserted in svaid'or'ificeV so asV to substanf tiallyrcioSe said orifice andso` that@ portion Aj; Y of saidvplug` is in electrical contact withythe furnace charge, means for Vcooling `saidplug and 'means including said plug-'providing ay i. jl'
grounding circuit for saidfurnace charge."
ping orifice therein, said' orifice being `pro-.
vided with a portion `flarc-id'toward thefin-f VteriorV ofts'aid furnace," af'cylindrical plug memberfarrangedfto close saidoriiice'andf- 4having aportion `embraced bysaidflared?A portion and means "for cooling v said plug iso` thatlthe; metal between said lplug and .the
walls .of said'. flared ,portion maintaine'diin jrV a solidified condition'asfflo-ngrassaidplug'fis `I i' Yf ilme- Y f 115'- l so."Y
US490762A 1929-11-04 1930-10-23 Furnace tapping device Expired - Lifetime US1833739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1833739X 1929-11-04

Publications (1)

Publication Number Publication Date
US1833739A true US1833739A (en) 1931-11-24

Family

ID=10891616

Family Applications (1)

Application Number Title Priority Date Filing Date
US490762A Expired - Lifetime US1833739A (en) 1929-11-04 1930-10-23 Furnace tapping device

Country Status (1)

Country Link
US (1) US1833739A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763480A (en) * 1950-07-28 1956-09-18 Nat Lead Co Apparatus for producing refractory metals
US2817695A (en) * 1955-11-21 1957-12-24 Babcock & Wilcox Co Electric furnace and electrode structures for kaolin melting
US3743139A (en) * 1971-08-09 1973-07-03 United States Steel Corp Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel
US3794218A (en) * 1971-09-27 1974-02-26 Concast Ag Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel
US3931913A (en) * 1973-11-16 1976-01-13 Stopinc Aktiengesellschaft Slide gate nozzle
US4063720A (en) * 1973-03-23 1977-12-20 Camille Boutet Automatic unplugging aluminothermic welding crucible
WO2004065871A1 (en) * 2003-01-17 2004-08-05 Outokumpu Oyj Arrangemnt and method for opening and closing the taphole of a smelting reactor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763480A (en) * 1950-07-28 1956-09-18 Nat Lead Co Apparatus for producing refractory metals
US2817695A (en) * 1955-11-21 1957-12-24 Babcock & Wilcox Co Electric furnace and electrode structures for kaolin melting
US3743139A (en) * 1971-08-09 1973-07-03 United States Steel Corp Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel
US3794218A (en) * 1971-09-27 1974-02-26 Concast Ag Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel
US4063720A (en) * 1973-03-23 1977-12-20 Camille Boutet Automatic unplugging aluminothermic welding crucible
US3931913A (en) * 1973-11-16 1976-01-13 Stopinc Aktiengesellschaft Slide gate nozzle
WO2004065871A1 (en) * 2003-01-17 2004-08-05 Outokumpu Oyj Arrangemnt and method for opening and closing the taphole of a smelting reactor

Similar Documents

Publication Publication Date Title
US1833739A (en) Furnace tapping device
GB1252310A (en)
JP2020073844A (en) Plasma melting furnace comprising discharge gate in side surface
US3845706A (en) Apparatus for continuously measuring temperature in a furnace
ES485781A1 (en) Cooled electrode for making contact with a metal melt.
US3293412A (en) Electrically heated furnace for molten metal
US848422A (en) Method of maintaining or increasing the fluidity of molten or semimolten materials by means of electricity.
ES522011A0 (en) DEVICE FOR CASTING ELECTRODE GRIDS FOR ELECTRIC ACCUMULATORS.
EP0167037B1 (en) Bottom electrode for pouring ladles
US1889604A (en) Protective apparatus for furnaces
DE726445C (en) Electrically heated hearth melting furnace for melting light metals or their alloys
US977303A (en) Electric furnace.
JPS61150758A (en) Method for heating molten metal in tundish for continuous casting
US1778578A (en) Electric refining furnace
SU1077698A1 (en) Slide gate
US1739343A (en) Melting and refining furnace
SU39283A1 (en) Electric oven
DE855221C (en) Process for joining metal parts with ceramic bodies by hot upsetting
JPS59129319A (en) Electric melting device
DE587729C (en) Crucible furnace for melting electrically conductive materials, in particular metals
DE10204305A1 (en) Refractory spout for a metallurgical vessel
CH216257A (en) Device for heating electrode salt bath ovens.
Hufnagel Melting and Holding Furnaces Seen at GIFA'84
US1855907A (en) Furnace
KR101193877B1 (en) Cover for inserting hole of tap hole filer