Submerged Entry nozzles thiab cov nozzles ntev muaj kev cuam tshuam zoo rau cov txheej txheem zoo thiab cov txheej txheem kev ua haujlwm zoo thaum lub sij hawm steel nruam casting, yog li xaiv ib qho kev tshawb fawb thiab tsim nyog nozzle hauv cov qauv thiab cov khoom siv yog qhov tseem ceeb.
1.submerged nkag nozzle
Hauv kev ua haujlwm nruam nruam, ib qho kawg ntawm lub taub dej yog txuas nrog lub tundish, thiab lwm qhov kawg yog txuas nrog pwm. Muaj ib tug submerged nozzle ntawm tundish thiab pwm. Ntawm qhov tod tes, nws txoj haujlwm tseem ceeb yog xav txog hauv kev txhaj tshuaj ntawm cov hlau molten rau hauv cov pwm tooj liab, thiab ntawm qhov tod tes, nws tau cuam tshuam los ntawm kev tiv thaiv oxidation hauv kev lag luam steel. Yog li ntawd, nws yog siv los ua ib qho kev ua haujlwm refractory, nws yuav tsum muaj kev nkag tau zoo thiab kev ua haujlwm sealing. Yog li ntawd, xav txog kev tsim thiab xaiv cov khoom siv ntawm lub qhov dej tsis muaj dej, lub xeev ntawm cov hlau ntws, cov duab ntawm lub billet thiab nws lub xeev solidification yuav tsum tau txiav txim siab tag nrho.
1.1 Cov duab ntawm submerged nkag Nozzle
Raws li kev sib txawv ntawm kev sib txawv ntawm lub tshuab nqus dej, muaj ob hom sib txawv, ib qho yog lub tshuab nqus dej, thiab lwm qhov yog lub taub dej sab nraud. Txawm li cas los xij, kev tsim lossis kev xaiv ntawm lub nozzle zoo peb tab tom tham txog feem ntau yog hais txog lub kaum sab xis thiab cov duab ntawm lub qhov hluav taws xob steel. Yog vim li cas vim li cas peb thiaj li yuav tsum tau ua qhov tsim nyog tsim nyog rau cov duab ntawm lub nozzle yog kom zoo dua ua cov sundries nyob rau hauv lub crystallizer ntab thiab ces coj lawv tawm. Txawm li cas los xij, nyob rau hauv qhov tseeb pouring lag luam, txawv steel hom, sib txawv pouring speeds, thiab sib txawv crystallizer cross-sectional ntau thiab tsawg yuav muaj ntau yam yuav tsum tau nyob rau hauv lub pouring lag luam. Yog li ntawd, thaum peb xav txog qhov zoo li cas ntawm lub submerged nozzle yuav tsum tau siv, nws yog xam raws li enabling cov hlau ntws kom muaj zog flushing nyhuv nyob rau hauv pem hauv ntej ntawm lub solidified plhaub.
2. Ntev Nozzle
Nyob rau hauv lub nruam casting lag luam, lub nozzle ntev nyob rau hauv qis nozzle ntawm zawv zawg nozzle ntawm lub ladle, thiab nws lub luag haujlwm tseem ceeb yog tiv thaiv cov hlau molten los ntawm oxidized vim kev sib cuag nrog cov cua thaum nws ntws mus rau tundish. Rau kev ua haujlwm nruam nruam, lub nozzle ntev yog qhov tseem ceeb, tsis yog tsuas yog cuam tshuam nrog nws cov hlau tsim kev ua haujlwm, tab sis kuj muaj feem xyuam rau cov txiaj ntsig. Yog li ntawd, rau cov duab ntawm lub shroud, kev xaiv ntawm cov khoom kuj tseem ceeb heev. Piv nrog submerged nozzles, ntev nozzles kuj yuav tsum muaj ntau yam zoo xws li tawg tsis kam thiab corrosion kuj.
Piv nrog submerged nozzles, ntev nozzles muaj ntau dua qhov tshwm sim ntawm kev tawg lossis tawg thaum siv, yog li hauv cov txheej txheem ntawm kev xaiv cov khoom, yuav tsum tau them nyiaj ntau dua rau nws qhov kev tiv thaiv tawg. Vim hais tias ntawm cov tsos, lub shroud loj dua thiab hnyav dua, yog li nws yuav tau txais kev cuam tshuam ntau dua txhua yam tsis muaj teeb meem hauv kev teeb tsa lossis kev siv. Ntxiv mus, piv nrog lub submerged nozzle, lub nozzle ntev tsis muaj ib tug tshwj xeeb preheating ntaus ntawv, yog li nws yuav tsum tau tiv taus kub heev thaum siv.
