Cov txheej txheem qhuav yog ib txwm ua thiab thawj txheej txheem ntawm hlau oxide liab hauv Suav teb. Nws qhov zoo yog tias cov txheej txheem ntau lawm yog qhov yooj yim, cov txheej txheem luv luv, thiab cov cuab yeej siv peev nyiaj tsawg. Qhov tsis zoo yog qhov zoo ntawm cov khoom tsis zoo me ntsis, thiab cov txheej txheem calcination tsim cov pa phem, uas muaj kev cuam tshuam loj rau ib puag ncig. Xws li txoj kev jarosite calcination, ib qho loj ntawm sulfur -muaj roj yog tsim thaum lub sij hawm calcination.
Nyob rau hauv xyoo tas los no, raws li kev siv dav hlau - muaj cov khib nyiab, cov txheej txheem qhuav xws li sulfuric acid slag method thiab hlau ore hmoov acidification roasting txoj kev tau tshwm sim. Qhov zoo yog cov txheej txheem yooj yim thiab kev nqis peev tsawg, thiab qhov tsis zoo yog qhov zoo ntawm cov khoom tsim tawm tsawg. Tsuas yog siv tau rau hauv qis - qhov kawg.
