Ladle Nozzle thaiv yog ib qho teeb meem uas muaj ib qho kev sib tw txuas ntxiv, tshwj xeeb tshaj yog thaum siv cov hlau high-alumina-stabilized steel thiab lwm cov hlau yooj yim oxidized. Kev thaiv kev tuaj yeem ua rau muaj kev cuam tshuam hauv cov txheej txheem pouring, poob qis hauv qhov zoo ntawm Molten Steel thiab txawm muaj xwm txheej ntau lawm.
I. Cov hom tseem ceeb thiab ua rau ntawm nozzle thaiv
1. Al₂o₃ Deposition Thaiv (feem ntau)
Ua rau:
Tus [AL] thiab [O] hauv Molten Steel muaj kev sib cais los tsim al₂o₃ suav (piv txwv li txhuas-quenched steel: 2 [al] {2}} → al₂o₃).
Al₂o₃ hais ua raws li thiab tso nyiaj rau sab hauv phab ntsa ntawm lub nozzle (tshwj xeeb tshaj yog nyob hauv qhov chaw nqaim), maj mam ua ib qho kev sib tw.
Cov yam ntxwv:
Lub blockage yog dawb los yog tawm-dawb hauv cov xim thiab nyuaj hauv kev ntxhib los mos.
Nws yog qhov tshwj xeeb tshaj yog qhov hnyav hauv cov hlau loj-hlau (piv txwv li yog tias hlau) thiab thaum tshuaj ntsuab calcium tsis txaus.
2. Txias Hlau Thaiv
Ua:
Qhov ntsuas kub ntawm Molten Steel yog tsawg dhau los yog lub nozzle tsis yog preheated txaus, ua rau cov hlau molten rau cov pob zeb.
Cov yam ntxwv:
Lub blockage yog ib lub plhaub hlau steel, thiab nws feem ntau tshwm sim thaum pib nchuav lossis thaum muaj kev cuam tshuam.
3. Lwm cov kev thaiv
Qhov chaw:
Deagidization cov khoom lag luam (xws li Sio2, Xaul · ALo ·
2. Kev tiv thaiv thiab tswj kev ntsuas
(1)Txheej txheem optimization
Kua Hlau Tsev Kev Tswj Dej
Ntxiv dag zog rau deoxidation: Siv cov deoxidation deoxidation (xws li kev kho kom zoo al + cice) kom txo qis dawb [AL] thiab [O].
Kev kho kom muaj kev kho mob calcium: Ntxiv cov calcium hloov al₂o₃ rau tsawg dua 12casiao₃ (kua calcium aluminate) kom tiv thaiv al₂o₃ los ntawm agglomerating.
Ntev lub sijhawm ua kom zoo nkauj: kom paub tseeb tias kev suav nrog ntab rau saum npoo (piv txwv li muag muag Argon tshuab hauv LF cub).
Ncuav txoj kev tswj kub
Tswj xyuas superheat ntawm Molten Steel (feem ntau {{{}}} degree) kom tsis txhob txias kub ntawm qis kub lossis kub uas tau tawm tsam yaig.
Preheat the nozzle sufficiently (>1000 degree) los tiv thaiv cov hlau txias los ntawm condensing.
Tiv thaiv lub pouring
Siv lub nozzle ntev + Argon foob rau cais cov huab cua thiab txo cov oxidation theem nrab.
(2)Nozzle tsim thiab cov khoom txhim kho
Anti-blockage nozzle structure
Cua Kab Hlau Ntsug Nozzle: Argon tau qhia txog kev ua yeeb yaj kiab huab cua kom tiv thaiv al₂o₃ los ntawm adering li cas (lub argon ntws mus kom tsis txhob tswj swb untrainment hauv molten hlau).
Slot Nozzle: Sab hauv phab ntsa yog tsim nrog cov raws seem kom cuam tshuam cov ntws ntawm Molten hlau thiab txo cov thawv loj thiab txo kom muaj kev faib khoom.
Ceev-Hloov Nozzle: Hloov nrawm nrawm thaum muaj kev thaiv kom txo qis downtime.
Cov Khoom Siv Khoom Zoo
Hauv ob sab phlu txheej: Piv txwv li Zro₂-CAO txheej (tsawg affinity nrog al₂o₌).
Cov Ntaub Ntawv Tsis-Oxide: Xws li Bn (Boron Nitride), Si₃n₄, uas tiv taus txoj kev yaig thiab tsis ua raws li yooj yim rau al₂o₃.
(3)Kev ua haujlwm thiab txij nkawm
Tu tas li
Siv cov pa roj oxygen kom hlawv los ntawm cov chaw thaiv ntawm cov ncuav (ceev faj kom tsis txhob muaj kev puas tsuaj rau lub nozzle).
Saib xyuas thiab ceeb toom thaum ntxov
Kev tshuaj xyuas lub sijhawm tiag tiag ntawm cov hlau tsis txawv txav lossis txo tus nqi rau kev cuam tshuam thaum ntxov.
