Cov txheej txheem ntawm hluav taws xob arc rauv steelmaking
Cov txheej txheem hluav taws xob arc rauv smelting tuaj yeem muab faib ua peb hom: oxidation txoj kev, rov qab oxidation txoj kev, thiab txoj kev tsis oxidation. Nrog rau txoj kev loj hlob thiab kev loj hlob ntawm theem nrab refining thev naus laus zis, cov tshuab hluav taws xob tau pib hloov los ntawm cov khoom siv smelting rau cov khoom siv melting, thiab siv los ua cov cua sov thiab cov qhov cub ua kom zoo.
1. Hluav taws xob arc rauv oxidation txoj kev
Cov yam ntxwv ntawm txoj kev oxidation yog tias muaj lub sijhawm oxidation thaum lub sijhawm smelting, uas tuaj yeem ua tiav cov haujlwm xws li decarbonization dephosphorization, degassing, thiab tshem tawm impurity. Tsis muaj cov kev cai tshwj xeeb rau cov khoom siv hluav taws xob, thiab yuav luag txhua hom hlau tuaj yeem smelted los ntawm txoj kev oxidation. Muaj peb txoj hauv kev.
- Ib txheej txheej slag
Lub sijhawm yaj, (ua tiav ntawm melting),Lub sijhawm oxidation(oxygen tshuab rau refining, C tshuab), (slag flow),steel tapping.
Thaum lub sij hawm melting mus rau lub sij hawm oxidation, tsuas yog thawj oxidizing slag yog tsim, thiab ces ua tiav cov txheej txheem refining nyob rau hauv lub cub tawg. Thaum steel tapping, ntxiv cov txo slag thiab ferroalloy. Kho qhov muaj pes tsawg leeg thiab qhov kub thiab txias los ntawm cov roj stirring. Feem ntau, nws koom tes nrog LF rauv rau kev tsim khoom.
- Semi ob chav slag txheej txheem
Lub sijhawm yaj, (ua tiav ntawm melting),Lub sijhawm oxidation(oxygen tshuab rau refining, C tshuab), (slag tshem tawm)txo lub sij hawm(txiv qaub, ferroalloy, thiab lwm yam),steel tapping.
Thaum kawg ntawm lub sijhawm oxidation, tshem tawm cov oxidized slag, ntxiv txo slag thiab ferroalloy rau lub cub tawg, thiab tsuas yog tsim cov slag tsawg tsawg hauv lub sijhawm luv luv. Kho qhov muaj pes tsawg leeg thiab kub ua ntej steel tapping. Feem ntau koom tes nrog LF rauv rau sab nrauv refining.
- Ob chav slag txheej txheem
Lub sijhawm yaj, (ua tiav ntawm melting),Lub sijhawm oxidation(oxygen tshuab rau refining, C tshuab), (slag tshem tawm)txo lub sij hawm(ntxiv cov hmoov carbon, ferrosilicon, txiv qaub thiab ferroalloy, thiab lwm yam),steel tapping.
Thaum lub sij hawm melting mus rau lub sij hawm oxidation, oxidizing slag yog tsim, thiab tom qab dephosphorization thiab kev hloov ntawm cov ntsiab lus carbon, oxidizing slag raug tshem tawm tag nrho. Fe-Mn, Fe-Si thiab lwm yam khoom siv ua ntej dexidation tau ntxiv, ua raws li cov txiv qaub, fluorite, hluavtaws slag qub, thiab lwm yam, los tsim cov slag nyias. Carbon hmoov, Fe-Si thiab lwm yam ntaub ntawv yog ntxiv rau hauv batch rau deoxidation, desulfurization thiab muaj pes tsawg leeg kho nyob rau hauv lub cub tawg. Coj mus rhaub cov hlau tom qab kawg deoxidation.
2. Rov qab oxidation txoj kev
Rov qab oxidation txoj kev, tseem hu ua ob slag txo txoj kev, yog tus cwj pwm los ntawm ib tug luv luv oxidation lub sij hawm nyob rau hauv lub smelting txheej txheem, uas ua rau ob qho tib si oxidized slag thiab txo slag, thiab tuaj yeem tshuab oxygen rau decarbonize, tshem tawm cov roj, thiab tshem tawm cov inclusions.
Txoj kev no yog qhov nyuaj rau tshem tawm phosphorus thiab yuav tsum tau them rau lub cub tawg kom muaj cov phosphorus tsawg recirculating seem steel; Txoj kev xa rov qab cov pa oxygen tshuab, vim nws cov nqi me me decarburization thiab lub sijhawm oxidation luv, tuaj yeem tsis tsuas yog tshem tawm cov teeb meem tsis zoo, tab sis kuj rov kho cov ntsiab lus ntau ntawm cov hlau, ua rau nws tsim nyog rau smelting steel qib uas muaj chromium thiab tungsten xws li stainless hlau thiab high-speed hlau.
3. Txoj kev tsis yog oxidation
Txoj kev tsis yog oxidation, raws li lub npe qhia, txhais tau hais tias tsis muaj oxidation lub sij hawm, tsis tas yuav tsum tau dephosphorization, decarbonization, thiab tshem tawm roj; Tom qab melting, seem hlau ncaj qha nkag mus rau lub sij hawm txo: nruj yuav tsum tau muab tso rau ntawm seem hlau, tsis muaj xeb, dryness, tsawg phosphorus cov ntsiab lus, thiab cov ntsiab lus carbon;
Nws tuaj yeem siv rov ua tau zoo dua feem ntau ntawm cov hlau alloying hauv cov khoom seem, txo lub zog siv, slag thiab oxidant noj, thiab tseem muaj txiaj ntsig zoo rau lub neej kev pab cuam ntawm lub tshuab hluav taws xob.