Pig Hlau
Npua hlau yog cov khoom siv casting muab rho tawm los ntawm cov hlau ore uas muaj cov pa roj carbon ntau, hlau, thiab lwm yam impurities. npua hlau yog lub hauv paus ntawm
Steelmaking
Desulfurization sab nraum lub cub tawg ntawm molten hlau yog hais txog cov txheej txheem pretreatment uas desulfurizes cov hlau molten sab nraum lub cub tawg ua ntej nkag mus rau steelmaking rauv kom txo cov sulfur ntsiab lus ntawm npua hlau, txhim kho cov hlau zoo, thiab txhim kho cov kev qhia thiab kev lag luam ntawm cov hlau cog.
Steelmaking yog kev ua cov npua hlau rau hauv cov hlau nrog qee yam tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab thiab lub cev. Cov txheej txheem dhau los ntawm ntau cov kauj ruam, txhua qhov yuav tsum tau ua haujlwm sib txawv thiab cov khoom siv ntxiv.
Blast furnace desulfurization yog tus txheej txheem ntawm tshem cov sulfur nyob rau hauv blast furnace ironmaking thiab yog qhov tseem ceeb tshaj plaws desulfurization txuas hauv steel ntau lawm. Sulfur yog ib qho teeb meem loj tshaj plaws hauv cov hlau. Txhawm rau txo nws txoj kev puas tsuaj, cov ntsiab lus sulfur hauv cov hlau yuav tsum raug txo kom ntau li ntau tau. Raws li txoj cai, desulfurization yuav tsum ua kom tiav thaum lub sij hawm ua hlau hauv qhov cub tawg. Suav cov qauv hauv tebchaws tau teev tseg tias qhov siab tshaj plaws uas tso cai rau cov ntsiab lus sulfur hauv npua hlau yuav tsum tsis pub tshaj {{0}}}.07%, thiab cov tuam txhab feem ntau siv 0.03% cov ntsiab lus sulfur hauv npua hlau raws li qhov ntsuas kev ntsuas zoo. Yog li ntawd, blast furnace desulfurization yog qhov teeb meem tseem ceeb hauv kev tsim cov npua hlau tsim nyog.
Sulfur tuaj yeem yaj hauv cov kua npua hlau los ua cov tshuaj tsis kawg. Txawm hais tias solubility ntawm leej faj nyob rau hauv cov khoom hlau yog me me, nws tuaj yeem ua rau cov ciam teb nyob rau hauv daim ntawv ntawm sulfides xws li FeS los ua ib qho qis melting point eutectic ntawm Fe thiab FeS. Thaum rhuab mus rau ib qho kub, ib theem ua kua tshwm nyob rau hauv hlau. Qhov no ua rau thermal brittleness ntawm hlau thiab hlau, thiab cov hlau yog feem ntau ua rau tawg thaum dov thiab forging. Sulfur kuj tuaj yeem tsim cov sulfur oxides nrog cov pa oxygen hauv cov hlau, ua rau kub embrittlement tshwm sim ntawm cov ntsiab lus sulfur qis thiab kub. Ntau yam sulfide inclusions kuj tuaj yeem tsim hauv hlau thiab hlau. Ua ke nrog lwm cov khoom siv tsis yog hlau, lawv muaj kev cuam tshuam zoo rau cov tshuab hlau, txo cov peev txheej ntawm cov hlau molten, thiab ua rau npuas hauv castings.
