DE800576C - Nozzle or needle base for the fresh process in metallurgical ovens - Google Patents

Nozzle or needle base for the fresh process in metallurgical ovens

Info

Publication number
DE800576C
DE800576C DEH613A DEH0000613A DE800576C DE 800576 C DE800576 C DE 800576C DE H613 A DEH613 A DE H613A DE H0000613 A DEH0000613 A DE H0000613A DE 800576 C DE800576 C DE 800576C
Authority
DE
Germany
Prior art keywords
nozzle
fresh process
needle base
fresh
metallurgical
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
Application number
DEH613A
Other languages
German (de)
Inventor
Paul E Dr-Ing Hardt
Hans Dr-Ing Kosmider
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.)
HUETTENWERK HASPE AKT GES
Original Assignee
HUETTENWERK HASPE AKT GES
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 HUETTENWERK HASPE AKT GES filed Critical HUETTENWERK HASPE AKT GES
Priority to DEH613A priority Critical patent/DE800576C/en
Priority to GB1965/50A priority patent/GB668124A/en
Application granted granted Critical
Publication of DE800576C publication Critical patent/DE800576C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • C21C5/48Bottoms or tuyéres of converters

Description

Beint Konverterfrischprozeß (Thonnas-Bessenier- @erta@ren) wercitn die lhrischgase (Wind, sau2r- @tr>:iarlgereicherter Wind, reiner Sanerstof o:lur (-in t@emiseh von Sauerstoff und anderen Frisch- und 1\tilillil:itol11) \-o11 tllltel:. voll (i.':' 1e it" (1"le'r- aucls v(nl ollen durch einen Düsen- oder \adeibodrn in Glas zu frischende Eisenbad geblasen. An der 1)üsunamrittsstellc reagiert der in den Frischgasctt enthaltene freie und gebmulcne Sauerstoff sofort tiit (ler;l E=iseil unter Bildung von 1#e0. Ist der Cberdruck int Windkasten im #IerlsäUnis zuln fer- rostatiscllen Druck des Bades zu gering oder ist durch zu grolle Reibung in den einzelnen Düsen der Druckanfall zu groß, brennen die Düsen trichtrrfiirntig an und führen zu einem vorzeitigen 'Verschleiß des Düsunbedens. Das Anlnetuum der Düsetiiiffnungen ist nicht nur auf thermische fJErer- hitzung, sondern vor allein auf den chernischen Finfluß des Fe0 zurückzuführen. Das Eisenoxvllul ist für alle hasischcn und sauren feucrfestnt Stoffe (fas stärkste Verflüssigungsmittel. Benn Wind- friscliverfahren wer(len die Düsen utul somit der lkelen durch (las Trägergas (Stickstoff) wTitge- ltvi:rl geschützt, und zwar dergestalt, daß das gebil- (1:te 1-*e() durch die voni Stickstoff hervorgerufene 1 @;r:lum#.välrung sofort ins 13ad getragen WL GIit zur@eltatenrler Sauerstottanreicherung wird aber die 13a ltnnwälzung, besonders in der Iintllltog)horungs- lur orle. beten basischen Vct-fahren geringer-. Die l1()-1lmzuntrathnt und (he Temperatur unmittel- bar üllur (gen Düsen AM größer. Mit steigender femll(ratur (tnd l^«)-Kotizetitration wird auch (lio Zerstörung der Düsen Imw. Löcher der basischen und sauren Böden größer. Wie Versuche gezeigt fahrn, 1>t-etiilell schon nach t bis a C'hargcn rlie 11iis(@tt zu tief(#ti, trichterförmigen I,iichern an. Der 1u<trittä(lucrschnitt wird immer größer und die .lustrittsgeschwinrligl:eit des Frischgases immer kleiner. Das zu frisclicn(le Eiseil kann inliner tiefer- in Ilie erweiterten (angebrannten) Diisen ('.ringen, und dz:s he() kann inuner mehr mit den 1@<@.siscllen und sauren feuerfesten Statten reagieren. Das tr-iclitet-fiirniigc und tiefe Anbrennen führt dat;n ztt friilizeit:geu Zerstörungen des Bodens. Bei @rrwel:(lutlg vors reinem @auerstr:ft oAer eineng Gt- nAch von Sauerstoff und arideren gasförmigen r@ ler festet) Frischinitteln können Düsen- oder Na- delll@@ letz übUcher Bauart aus basischen oller sauren ft-tterfestet) Stoffen nicht mehr wirtschaftlich ver- wandt werden. L-tn da; Anbrennen der Düsen- und \a(l(Mden beim Windfrischen, büsonders mit s<tuet-stoffatigereiclict-tcnt Wind sowie bei Verwen- (Ittrig von reinem Sau °rst(;t` (#der einem Gemisch von reinem Sauerstoa und anderen Frischmitteln, zu verhindern. bestehen die Düsen- oder Nadel- lücl@er erfindungsgemäß aus Schutzrohren aus Me- taller, (:der Metallegierungen, die cin2 geringem ;auerstoftafiinitiit als 1#.isun und außerdem eine sehr holte 1Viirmeleitfälligkeit hallen. Als geeignet- stes Material hat sich für di(-sen Zweck Kupfer er- \#; iesc n. Das hei deal Frischpmzeß unmittelbar über delt Düsen entstehende Ilsenoxvdul verbindet sich nicht reit dein Kupfer der Schtitzrollre der einzel- nen Düsen- oder Nadellöcher. Das I?iserioxy(lul bann daher weder direkt noch indirekt von der Innenseite der Düsen mit dem feuerfesten Material reagieren. Außerdem ist infolge der großen \VärmeMtfähigkcit und der küllletlrlen Wirkung der durch die Düsen strömenden Frischmittel ein vorzeitiges Ah- oder Einschmelzen der Kupfer- schutzrohre nicht m<iglich. Die Erfindung zeitigt den weiteren Vorteil, daß. wie die Zeichnung zeigt, der Aufbau der bisher verwendeten basischen oller sauren Düsenhöllen nicht geändert ztt werden 1»-aucht. sondern daß z.13. bei den \adelllöden an Stelle der Holznadeln Kupferrohre t verwendet tverden. Die Kupferrohre kiinnen genau so wie die in die Boden- Platten, 3 eingelassen «'erden. Uni die Kupferrohre ltchndet sich die feuerfeste Stanipfmasse 2. lki Verwendung voll glatten Metallrohren (Kupfer- rohren) wird der Reibungswiderstand gegenüber (gen rauben Innenflächen der feuerfesten Düsen wesentlich kleiner und der Energieaufwand zur Förderung (ges Ih-ischmittels geringer. Beint converter freshening process (Thonnas-Bessenier @ erta @ ren) work the lhrisch gases (wind, sau2r- @tr>: iarl-enriched wind, pure Sanerstof o: lur (-in t @ emiseh of oxygen and other fresh and 1 \ tilillil: itol11) \ -o11 tllltel :. full (i. ':' 1e it "(1"le'r- also v (nl ollen through a nozzle or adeibodrn blown iron bath into glass to be freshened. At the 1) üsunamrittsstellc reacts in the fresh gas Contains free and blown oxygen immediately tiit (ler; l E = iseil with formation of 1 # e0. Is the Overpressure in the wind box in the The static pressure of the bath is too low or too low due to excessive friction in the individual nozzles If the pressure build-up is too great, the nozzles will burn funnel-shaped and lead to premature 'Nozzle wear and tear. The event of the Nozzle openings are not only focused on thermal fjErer- heating, but before alone on the chemical niches The flow of the Fe0 can be traced back. The iron oxvllul is for all hashish and acidic fire-resistant substances (contained the strongest liquefying agent. Benn Wind- friscliververfahren (len the nozzles utul the lkelen by (las carrier gas (nitrogen) w T itge- ltvi: rl protected in such a way that the (1: te 1- * e () by the nitrogen induced 1 @; r: lum # .välrung carried immediately into the 13ad WL GIit but the @ eltatenrler oxygen enrichment becomes 13a ltnnwälzung, especially in the Iintllltog) hor- lur orle. pray basic Vct-drive lower-. the l1 () - 1lm increased and (he temperature immediately bar üllur (towards nozzle AM larger. With increasing femll (ratur (tnd l ^ «) - citation titration is also (lio Destruction of the nozzles Imw. Holes of the basic and acidic soils larger. As shown by experiments fahrn, 1> t-etiilell already after t to a C'hargcn rlie 11iis (@tt too deep (#ti, funnel-shaped I, iich to. The 1u <steps (the opening is getting bigger and bigger and the .lustrittsgeschwinrligl: with the fresh gas always smaller. To frisclicn (le Eiseil can inliner deeper- in Ilie enlarged (burnt) diisen ('.ring, and dz: s he () can do more with the 1 @ <@. Siscllen and acidic refractory equipments react. That tr-iclitet-fiirniigc and deep burning leads dat; n ztt friilizeit: geu destruction of the soil. at @rrwel: (lutlg vors pure @auerstr: ft oAer eing Gt- after oxygen and other gaseous forms r @ ler firmly) Fresh agents can use nozzle or delll @@ last usual type of construction made of basic oils, acidic ft-tterfestet) substances are no longer economically be turned. L-tn there; Burning the nozzle and \ a (l (Tired of refreshing the wind, especially with s <tuet-stoffatigereiclict-tcnt wind as well as when using (Ittrig of pure Sau ° rst (; t` (#der a mixture of pure oxygen and other fresh substances, to prevent. do the nozzle or needle lücl @ er according to the invention from protective tubes made of taller, (: of the metal alloys that cin2 low ; auerstoftafiinitiit as 1 # .isun and also a very fetched 1Viirmconductivity hall. As suitable- The first material has chosen copper for this purpose. \ #; iesc n. That means the fresh process immediately above delt nozzles resulting Ilsenoxvdul connects your copper does not ride the Schtitzrollre of the individual no nozzle or needle holes. The Işerioxy (lul therefore bans neither directly nor indirectly from the Inside of the nozzles with the refractory material react. Also, as a result of the great \ Warmth and the full effect the fresh agent flowing through the nozzles premature Ah or melting of the copper protective tubes not possible. The invention has the further advantage that. as the drawing shows, the structure of the previous used basic or acidic nozzle hells not changed ztt are 1 »-auch. but that z.13. in the \ adelllöden instead of the wooden pins Copper pipes are used. The copper pipes kiinnen just like them in the ground Plates, 3 embedded '' earth. Uni the copper pipes The refractory Stanipf mass 2. lki is shown Use of fully smooth metal pipes (copper pipes) is opposed to the frictional resistance (gen rob internal surfaces of the refractory nozzles much smaller and the energy expenditure for Promotion (total lower.

Claims (1)

FATENTANst>ltrLit:
Düsen- oder \a<iellx>:Lcn für den Frisch- prozeß in metallurgischen ()fers. inslwsondere in Konvertern. dadurch gek:°nnzeiclinet, daß die Düsen- oder \adelliicher aus Metallen oder Metallegierungen lxstchen. die eine geringere Sauerstotiafhnität als Eisen ha 1;n find eine sehr hohe @\'ürnleleitf:ihigl:eit besitzen, vorzugs`veiso Kupfer.
FATENTANst> ltrLit:
Nozzle or \ a <iellx>: Lcn for the fresh process in metallurgical () fer. especially in Converters. thereby gek: ° nnzeiclinet that the Nozzle or \ adelliicher made of metal or Metal alloys lxstchen. the one lesser Oxygen resistance as iron has 1; n find one very high @ \ 'ürnleleitf: ihigl: own time, vorzugs`veiso Copper.
DEH613A 1949-11-24 1949-11-24 Nozzle or needle base for the fresh process in metallurgical ovens Expired DE800576C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEH613A DE800576C (en) 1949-11-24 1949-11-24 Nozzle or needle base for the fresh process in metallurgical ovens
GB1965/50A GB668124A (en) 1949-11-24 1950-01-25 Improvements in tuyeres or bottoms for metallurgical furnaces, particularly bessemer converters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH613A DE800576C (en) 1949-11-24 1949-11-24 Nozzle or needle base for the fresh process in metallurgical ovens

Publications (1)

Publication Number Publication Date
DE800576C true DE800576C (en) 1950-11-16

Family

ID=7142232

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH613A Expired DE800576C (en) 1949-11-24 1949-11-24 Nozzle or needle base for the fresh process in metallurgical ovens

Country Status (2)

Country Link
DE (1) DE800576C (en)
GB (1) GB668124A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039083B (en) * 1953-12-05 1958-09-18 Bochumer Ver Fuer Gussstahlfab Container for refractory, liquid metals
DE1758816B1 (en) * 1968-08-13 1971-12-09 Maximilianshuette Eisenwerk Process for refining pig iron to steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039083B (en) * 1953-12-05 1958-09-18 Bochumer Ver Fuer Gussstahlfab Container for refractory, liquid metals
DE1758816B1 (en) * 1968-08-13 1971-12-09 Maximilianshuette Eisenwerk Process for refining pig iron to steel

Also Published As

Publication number Publication date
GB668124A (en) 1952-03-12

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