Hais txog Steel - Yuav Ua Li Cas Hlau Ua?
Oct 08, 2022
Cov hlau yog tsim los ntawm ob txoj hauv kev tseem ceeb: lub tshuab hluav taws xob hluav taws xob hluav taws xob-cov pa hluav taws xob yooj yim (BF-BOF) txoj kev thiab hluav taws xob arc rauv (EAF). Kev hloov pauv thiab kev sib txuas ntawm txoj kev tsim khoom kuj muaj.
Qhov sib txawv tseem ceeb ntawm txoj kev yog hom raw khoom lawv noj. Rau txoj kev BF-BOF cov no feem ntau yog cov hlau ore, thee, thiab cov hlau siv dua tshiab, thaum EAF txoj kev tsim cov hlau uas siv cov hlau thiab hluav taws xob siv. Nyob ntawm cov nroj tsuag kev teeb tsa thiab muaj cov hlau siv dua tshiab, lwm qhov chaw ntawm cov hlau hlau xws li cov hlau txo qis (DRI) lossis cov hlau kub kuj tuaj yeem siv rau hauv txoj kev EAF.
Tag nrho ntawm 70 feem pua ntawm cov hlau yog tsim los ntawm BF-BOF txoj kev. Ua ntej, hlau ores raug txo kom hlau, kuj hu ua kub hlau lossis npua hlau. Tom qab ntawd cov hlau hloov mus rau hlau hauv BOF. Tom qab casting thiab dov, cov hlau xa tuaj raws li kauj, phaj, ntu lossis tuav.
Cov hlau ua hauv EAF siv hluav taws xob los yaj cov hlau uas siv dua tshiab. Additives, xws li alloys, yog siv los kho cov tshuaj lom neeg muaj pes tsawg leeg. Lub zog hluav taws xob tuaj yeem ntxiv nrog oxygen txhaj rau hauv EAF. Cov txheej txheem qis qis, xws li casting, reheating thiab dov, zoo ib yam li cov uas pom nyob rau hauv txoj kev BF-BOF. Txog 30 feem pua ntawm cov hlau yog tsim los ntawm EAF txoj kev.
Lwm qhov kev siv tshuab hlau, qhib lub qhov cub hluav taws xob (OHF), ua li ntawm 0.4 feem pua ntawm cov hlau thoob ntiaj teb. Cov txheej txheem OHF yog lub zog siv zog heev thiab poob qis vim nws qhov tsis zoo ib puag ncig thiab kev lag luam.
Feem ntau cov khoom siv hlau tseem siv tau ntau xyoo ua ntej lawv tuaj yeem rov ua dua. Yog li ntawd, tsis muaj cov hlau rov qab txaus kom tau raws li qhov xav tau loj hlob siv EAF steelmaking txoj kev ib leeg. Kev thov tau ua tiav los ntawm kev siv ua ke ntawm BF-BOF thiab EAF txoj kev tsim khoom.
Tag nrho cov txheej txheem tsim khoom no tuaj yeem siv cov khoom siv rov ua dua tshiab los ua cov khoom siv. Cov hlau tshiab feem ntau muaj cov hlau siv dua tshiab.
