LF rauv, tseem hu ua ladle refining rauv, yog lub ntsiab sab nraud refining khoom hauv steel ntau lawm. LF furnace feem ntau yog hais txog lub qhov cub ua kom zoo hauv kev lag luam steel. Nws yog ib tug tshwj xeeb daim ntawv ntawm hluav taws xob arc rauv.
Kev kho kom zoo ntawm LF rauv feem ntau yog nyob ntawm cov slag dawb hauv lub thoob. Nyob rau hauv qhov chaw tsis tshua muaj oxygen (nrog rau cov ntsiab lus oxygen ntawm 5%), cov roj argon tau tshuab mus rau hauv lub thoob rau nplawm, thiab ua kom cov hlau molten los ntawm cua sov los ntawm lub qhov cub hluav taws xob uas siv graphite electrodes. Vim tias qhov nrawm ntawm cov tshuaj tiv thaiv ntawm slag thiab hlau los ntawm argon nplawm, qhov kub thiab txias siv cov cua sov tuaj yeem ua kom lub sijhawm ua kom zoo dua qub, yog li txo cov pa oxygen thiab sulfur cov ntsiab lus hauv cov hlau. Kev suav suav suav suav ua 0~0.1 raws li ASTM tus qauv. LF rauv tuaj yeem ua ke nrog hluav taws xob arc rauv los hloov lub sijhawm txo ntawm hluav taws xob arc rauv, thiab tseem tuaj yeem ua ke nrog oxygen converter los tsim cov hlau zoo hlau. Tsis tas li ntawd, LF rauv yog ib qho khoom siv tseem ceeb rau kev tswj cov khoom muaj pes tsawg leeg, qhov kub thiab txias, thiab khaws cov hlau molten hauv kev cob qhia nruam nruam, tshwj xeeb tshaj yog nyob rau hauv cov hlau alloy nruam casting ntau lawm kab. Yog li ntawd, qhov tshwm sim ntawm LF rauv tau tsim ib txoj kab tshiab sib koom ua ke LD-LF-RH-CC (txuas ntxiv mus) rau kev tsim cov hlau zoo. Kev txo qis ntawm cov hlau ntawm cov kab sib koom ua ke no yog ua tiav los ntawm LF rauv. Cov qib steel ua tiav los ntawm LF rauv yuav luag txhua hom hlau los ntawm cov hlau tshwj xeeb rau cov hlau dav dav, thiab cov txheej txheem sib txawv ntawm cov txheej txheem kev ua haujlwm tuaj yeem raug coj los ua raws li qhov xav tau ntawm kev tswj xyuas zoo hauv kev tsim khoom. Ntawm ntau yam khoom siv kho kom zoo, LF rauv muaj qhov ua tau zoo ntawm tus nqi-zoo.
LF rauv muaj cov yam ntxwv hauv qab no:
① Desulfurization
② Kho qhov kub thiab txias
③ Kev kho kom zoo ntawm cov khoom sib xyaw
④ Txhim kho qhov purity ntawm molten steel
⑤ Slag ua
Nws feem ntau muaj cov haujlwm hauv qab no:
(1) Lub tshuab hluav taws xob LF txuas nrog rau hluav taws xob arc rauv, uas ua rau lub voj voog ntau lawm ntawm hluav taws xob arc rauv thiab txhim kho cov hlau zoo.
(2) LF rauv yog txuas nrog LD converter, uas tuaj yeem txo thiab kho cov hlau hloov pauv, yog li txhim kho steel zoo thiab tsim cov qib steel tshiab.
(3) LF rauv tuaj yeem tswj hwm qhov muaj pes tsawg leeg thiab kub ntawm cov hlau molten, uas yog qhov zoo rau cov hlau hardenability thiab nruam nruam ntawm cov hlau tshwj xeeb.
Tom qab AOD refining, nws yog ntxiv refined nyob rau hauv lub LF rauv, uas belongs rau theem nrab refining thiab txo inclusions los xyuas kom meej lub purity ntawm cov hlau molten.