Zing'onozing'ono kukula kwa tinthu, ndipamwamba kuyera ndi.The coarser ndi tinthu kukula ndi, n'kovuta kwambiri kuchotsa mpweya, makamaka mpweya mkati tinthu n'zosavuta volatilize, zomwe zimakhudza whiteness wa mankhwala calcined.Zopangira zake ndizabwino, pamtunda waukulu, mpweya ndi wosavuta kuchotsa, mpweya ndi wosavuta kusuntha, komanso kuyera kwazinthu zopangira calcined ndikwambiri.

M'kati calcining mankhwala whiteness, kaolin ali pang'onopang'ono azimuth ndi kuwonjezeka calcination kutentha.Poyerekeza ndi 900 ℃, 850 ℃ kaolin calcination, mankhwala kaolin osati kuchotsa galasi madzi, kuonjezera pore kukula, komanso kusunga flaky, woyera kwambiri, wa calcination kutentha, kuchepetsa ndalama ndalama ndi kuipitsa chilengedwe, kotero 850 ℃ ndi yabwino calcination kutentha.

Kuyera kwa mankhwalawa kumawonjezeka ndi nthawi ya kutentha kosalekeza, koma zochitikazo zimachedwa.Kutentha kukakhala kochepa kwambiri, carbon mu kaolin sivuta kuchotsa.Pambuyo pa kutentha kwa maola oposa 4, mlingo wa decarburization ndi kuchepa kwa madzi m'thupi la chinthucho ndi chochepa, kotero kuti kuyera kwa mankhwalawa kumakhala bwino, koma kusinthako ndi kochepa kwambiri.Pofuna kupititsa patsogolo kutentha kwa kutentha, kutentha kosalekeza kwa mankhwala opangidwa ndi calcined kumakhala koyenera kwa maola 4

Pogwiritsa ntchito zowonjezera zowonjezera za calcining, njira yopangira imakhala yosavuta, mtengo wake umachepetsedwa, ndipo kuyera kwa zinthu za calcined kumakhala bwino kwambiri.Pakati pawo, sodium kolorayidi ndiye chowonjezera chothandiza kwambiri.Kumayambiriro kwa urea monga intercalation wothandizila kumawonjezera whiteness wa calcined kaolin

Kulamulira calcination m'mlengalenga ali ndi chikoka pa whiteness ndi yellowness wa calcined mankhwala.Kukwaniritsa zosowa za mpweya kuchotsa makalasi angapo kaolin, calcination mu oxidizing mlengalenga kumabweretsa otsika chitsulo okusayidi ndi mkulu mtengo, amene mosalephera kuchititsa kuwonjezeka kwa mpweya kuchotsa ndi yellowness mankhwala kaolin.Choncho, calcination pa 850 ℃ kutentha kwambiri ndi kuchepetsa mpweya akhoza kuchepetsa chitsulo otsika ndi mkulu chitsulo, kulamulira calcination mpweya, kuchepetsa whiteness ndi kusintha yellowness mankhwala.