(1) Txhawm rau ntxuav lub hnab ntim, cov khoom tsis huv xws li cov kua nplaum seem tuaj yeem raug cais tawm los ntawm cov khoom siv xws li ntxuav lub tank thiab kab rov tav cais. Nyob rau tib lub sijhawm, thaum lub sijhawm tu, kev tu tsis tu ncua lossis kev tu tsis tu ncua tuaj yeem raug xaiv raws li seb cov ntsiab lus tsis huv ntawm cov khoom tsis sib xws. Yog tias cov ntsiab lus impurity ntawm cov khoom tsis sib xws, kev siv tu tas li yog siv; yog tias cov ntsiab lus tsis sib xws, kev siv tshuaj ntxuav tu tsis tu ncua.
(2) Cov txheej txheem rinsing: cov polymers ntawm ntau qhov sib txawv tuaj yeem sib cais, thiab tom qab ntawd cov tshuaj yaug kom sib npaug pH tus nqi.
(3) Tus neeg saib xyuas tuaj yeem muab ntxiv thaum tu. Nws yog tus neeg saib xyuas rau cov hnab yas khib nyiab pov tseg ua ntej crushing thiab granulating. Nws tuaj yeem ntxuav txhua yam ntawm cov ntawv luam tawm, cov qauv thiab lwm yam stains ntawm cov hnab yas pov tseg. Qhov saum npoo ntawm lub hnab khib nyiab yog du thiab dawb li puas tau.
(4) Kev ntxuav (lub raj mis flakes): Siv lub tank ntxuav, kab rov tav cais thiab lwm yam khoom siv los cais cov kab mob xws li cov kua nplaum seem. Nyob rau tib lub sijhawm, nyob rau hauv cov txheej txheem tu, raws li seb cov ntsiab lus impurity ntawm cov khoom yog ib yam, tsis tu ncua los yog tsis tu ncua tu ntawm lub hnab tuj tuaj yeem xaiv. Yog tias cov ntsiab lus impurity ntawm cov khoom tsis sib xws, kev siv tu tas li yog siv; yog tias cov ntsiab lus tsis sib xws, kev siv tshuaj ntxuav tu tsis tu ncua.
Raws li ib txwm muaj, tom qab zoo li no lub hnab loj tu, cov ntsiab lus ntawm ntau yam impurities yog tswj ntawm li 10PPM. Koj tuaj yeem siv nws nrog kev ntseeg siab.