Cov txheej txheem tsim khoom ntawm bismuth sib txawv nyob ntawm cov khoom kawg (piv txwv li, metallic bismuth ingots, bismuth hmoov, bismuth alloys, los yog bismuth compounds), tab sis feem ntau tuaj yeem muab faib ua ob theem tseem ceeb: extraction thiab smelting los ntawm raw cov ntaub ntawv mus rau refined bismuth, thiab ua thiab shaping ntawm refined khoom bismuth. Cov hauv qab no yog cov txheej txheem tseem ceeb uas tau muab tso ua ke raws li cov ntaub ntawv pov thawj uas muaj rau pej xeem:
Smelting txheej txheem los ntawm Raw Materials mus rau siab -Purity Bismuth
Cov theem no feem ntau yog tsom rau thawj cov ore lossis bismuth- muaj cov khoom pov tseg, txhawm rau kom tau txais siab -purity (feem ntau ntau dua lossis sib npaug rau 99.99%) hlau bismuth.
Raw Khoom Pretreatment
Rau ore: Bismuth- muaj cov zaub mov muaj txiaj ntsig los ntawm kev muaj txiaj ntsig (kev sib cais sib cais, flotation, thiab lwm yam).
Rau cov pov tseg (piv txwv li, anode slime, bismuth- muaj cov alloys): Txo cov neeg ua haujlwm xws li coke, hlau hmoov, thiab limestone yog ntxiv rau hauv kev faib ua feem.
Smelting thiab Preliminary Separation
Oxygen-kev ua kom muaj txiaj ntsig zoo ua rau bismuth- nplua nuj hmoov txhuas lossis bismuth alloys muaj nuj nqis.
Los yog, qis-qib ore yog kho siv cov txheej txheem hydrometallurgical (xws li ferric chloride leaching).
