Kaolin ndi mchere wodziwika bwino wa dongo m'chilengedwe. Ndi mchere wothandiza pa utoto woyera, chifukwa chake, kuyera ndi chizindikiro chofunikira chomwe chimakhudza kufunika kwa kaolin. Pali chitsulo, zinthu zachilengedwe, zinthu zakuda ndi zonyansa zina mu kaolin. Zonyansa izi zimapangitsa kaolin kuwoneka mitundu yosiyanasiyana, zomwe zimakhudza kuyera. Chifukwa chake kaolin iyenera kuchotsa zonyansazo.
Njira zodziwika bwino zoyeretsera kaolin zimaphatikizapo kulekanitsa mphamvu yokoka, kulekanitsa maginito, kuyandama, mankhwala, ndi zina zotero. Izi ndi njira zodziwika bwino zoyeretsera kaolin:
1. Kulekanitsa mphamvu yokoka
Njira yolekanitsira mphamvu yokoka imagwiritsa ntchito makamaka kusiyana kwa kuchuluka kwa mchere wa gangue ndi kaolin kuchotsa zonyansa zamphamvu kwambiri za zinthu zachilengedwe zopepuka, quartz, feldspar ndi zinthu zomwe zili ndi chitsulo, titaniyamu ndi manganese, kuti achepetse mphamvu ya zonyansa pa kuyera. Ma centrifugal concentrators nthawi zambiri amagwiritsidwa ntchito kuchotsa zonyansa zamphamvu kwambiri. Gulu la hydrocyclone lingagwiritsidwenso ntchito kumaliza kutsuka ndi kuyeretsa kaolin panthawi yosankha, zomwe sizingokwaniritsa cholinga chotsuka ndi kuyika, komanso kuchotsa zonyansa zina, zomwe zimakhala ndi phindu labwino pozigwiritsa ntchito.
Komabe, n'kovuta kupeza zinthu zoyenera za kaolin pogwiritsa ntchito njira yolekanitsira, ndipo zinthu zoyenera zomaliza ziyenera kupezeka pogwiritsa ntchito njira yolekanitsira maginito, flotation, calcination ndi njira zina.
2. Kulekanitsa maginito
Pafupifupi miyala yonse ya kaolin imakhala ndi miyala yachitsulo yochepa, nthawi zambiri 0.5-3%, makamaka magnetite, ilmenite, siderite, pyrite ndi zina zodetsa utoto. Kulekanitsa maginito kumagwiritsira ntchito kusiyana kwa maginito pakati pa mchere wa gangue ndi kaolin kuchotsa zodetsa zamitundu iyi.
Pa magnetite, ilmenite ndi mchere wina wamphamvu wa maginito kapena ma filings achitsulo osakanikirana mu njira yopangira, kugwiritsa ntchito njira yolekanitsa maginito kuti mulekanitse kaolin ndikothandiza kwambiri. Pa mchere wofooka wa maginito, pali njira ziwiri zazikulu: imodzi ndiyo kuwotcha, kupanga kukhala mchere wamphamvu wa magnetic iron oxide, kenako kupitiriza kupatukana kwa maginito; Njira ina ndikugwiritsa ntchito njira yolekanitsa maginito ya gradient magnetic field magnetic field kuti mulekanitse maginito. Chifukwa kupatukana kwa maginito sikufuna kugwiritsa ntchito mankhwala, chilengedwe sichidzayambitsa kuipitsa, kotero mu ndondomeko ya mineral processing yopanda zitsulo imagwiritsidwa ntchito kwambiri. Njira yolekanitsa maginito yathetsa bwino vuto la kugwiritsa ntchito ndi kugwiritsa ntchito kaolin yotsika mtengo yomwe siili ndi mtengo wamalonda chifukwa cha kuchuluka kwa chitsulo.
Komabe, n'kovuta kupeza zinthu zapamwamba za kaolin mwa kupatula maginito kokha, ndipo mankhwala ndi njira zina zimafunika kuti muchepetse kwambiri kuchuluka kwa chitsulo muzinthu za kaolin.
3. Kuyandama
Njira yoyandama imagwiritsa ntchito makamaka kusiyana kwa thupi ndi mankhwala pakati pa mchere wa gangue ndi kaolin kuti ichotse zinyalala zambiri mu kaolin wosaphika komanso kuyera pang'ono, ndikuchotsa zinyalala zomwe zili ndi chitsulo, titaniyamu ndi kaboni, kuti igwiritse ntchito bwino zinthu za kaolin zotsika mtengo.
Kaolin ndi mchere wamba wa dongo. Zoipa monga chitsulo ndi titaniyamu nthawi zambiri zimayikidwa mu tinthu ta kaolin, kotero miyala yaiwisi iyenera kuphwanyidwa mpaka kufika pamlingo winawake wa kusalala. Njira ya Kaolinite yomwe imagwiritsidwa ntchito kwambiri podutsa njira ya flotation ya tinthu tating'onoting'ono ta ultra fine, njira ya flotation ya double fluid layer ndi njira yosankha flocculation flotation, ndi zina zotero.
Kuyandama kumatha kuonjezera kuyera kwa kaolin, pomwe vuto lake ndilakuti imafuna mankhwala ophera tizilombo ndipo imadula kwambiri, zomwe zimapangitsa kuti iipitse mosavuta.
4. Mankhwala a mankhwala
Kuchotsa zinthu zodetsedwa ndi mankhwala: zinthu zina zodetsedwa mu kaolin zimatha kusungunuka ndi sulfuric acid, hydrochloric acid, nitric acid ndi zinthu zina zochotsera zinthu zodetsedwa. Njirayi ingagwiritsidwe ntchito kuchotsa hematite, limonite ndi siderite kuchokera ku kaolin yotsika mtengo.
Kuyeretsa kwa mankhwala: zinyalala zomwe zili mu kaolin zimatha kusungunuka kukhala zinthu zosungunuka kudzera mu kuyeretsa, zomwe zimatha kutsukidwa ndikuchotsedwa kuti zinthu za kaolin zikhale zoyera bwino. Komabe, kuyeretsa kwa mankhwala kumakhala kokwera mtengo ndipo nthawi zambiri kumagwiritsidwa ntchito mu kaolin concentrate, yomwe imafunika kuyeretsedwa kwambiri ikachotsedwa.
Kuyeretsa Kukazinga: kusiyana kwa kapangidwe ka mankhwala ndi momwe zinthu zilili pakati pa zonyansa ndi kaolin kungagwiritsidwe ntchito powotcha ndi maginito, kuwotcha ndi kutentha kwambiri kapena kuwotcha ndi chlorination kuti muchotse zonyansa monga chitsulo, kaboni ndi sulfide mu kaolin. Njirayi ingathandize kusintha kwa mankhwala a zinthu zopangidwa ndi calcium, kuyeretsa kwambiri kaolin, ndikupeza zinthu zapamwamba za kaolin. Koma vuto la kuyeretsa kukazinga ndikuti mphamvu zimagwiritsidwa ntchito kwambiri, zosavuta kuyambitsa kuipitsa chilengedwe.
Kudzera mu ukadaulo umodzi, zimakhala zovuta kupeza zinthu za kaolin zapamwamba. Chifukwa chake, popanga zenizeni, tikukulangizani kuti musankhe wopanga zida zoyezera mchere woyenerera. Kuchita kuyesera kokonza mchere ndikugwiritsa ntchito ukadaulo wosiyanasiyana wokonza kuti muwonjezere ubwino wa Kaolin.
Nthawi yotumizira: Epulo-06-2020