Kaolin ndi mchere wopanda zitsulo, mtundu wa dongo ndi thanthwe la dongo lolamulidwa ndi mchere wa dongo wa kaolinite.Popeza kuti ndi yoyera komanso yosalimba, imatchedwanso nthaka ya mitambo yoyera.Amatchedwa Gaoling Village, Jingde Town, Province la Jiangxi.

Kaolin yake yoyera ndi yoyera, yofewa komanso yofewa ngati dongo, ndipo imakhala ndi thupi labwino komanso mankhwala monga pulasitiki ndi kukana moto.Mapangidwe ake amchere amapangidwa makamaka ndi kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar ndi mchere wina.Kaolin ali ndi ntchito zosiyanasiyana, makamaka ntchito papermaking, ziwiya zadothi ndi zipangizo refractory, kenako zokutira, mphira fillers, enamel glaze ndi zoyera simenti zopangira, ndi pang'ono ntchito mapulasitiki, utoto, inki, mawilo akupera, mapensulo, zodzoladzola tsiku ndi tsiku, sopo, Mankhwala, mankhwala, nsalu, mafuta, mankhwala, zomangira, chitetezo dziko ndi magawo ena mafakitale.
Kuwala Koyera Kwambiri
Kuyera ndi chimodzi mwazinthu zazikulu zaukadaulo wa kaolin, ndipo kaolin yokhala ndi chiyero chachikulu ndi yoyera.Kuyera kwa kaolin kumagawidwa kukhala kuyera kwachilengedwe ndi kuyera pambuyo pa calcination.Kwa zopangira za ceramic, kuyera pambuyo pa calcination ndikofunikira kwambiri, ndipo kukweza kuyera kwa calcination, kumakhala bwinoko.Ukadaulo wa ceramic ukunena kuti kuyanika pa 105 ° C ndiye muyeso wa kuyera kwachilengedwe, ndipo calcining pa 1300 ° C ndiye muyeso wowongolera kuyera.Kuyera kumatha kuyeza ndi mita yoyera.Meta yoyera ndi chipangizo chomwe chimayesa kunyezimira kwa kuwala ndi kutalika kwa mawonekedwe a 3800-7000Å (ie Angstrom, 1 Angstrom = 0.1 nm).Mu mita yoyera, yerekezerani chiwonetsero cha chitsanzo kuti chiyesedwe ndi chitsanzo (monga BaSO4, MgO, etc.), ndiko kuti, mtengo wa whiteness (mwachitsanzo, kuyera 90 kumatanthauza 90% ya chiwonetsero cha Standard chitsanzo).

Kuwala ndi chinthu chofanana ndi kuyera, chomwe ndi chofanana ndi kuyera pansi pa 4570Å (Angstrom) kuwala kwa kuwala.

Mtundu wa kaolin umagwirizana kwambiri ndi zitsulo zachitsulo kapena zinthu zomwe zili nazo.Nthawi zambiri, imakhala ndi Fe2O3, yomwe imakhala yofiira komanso yofiirira;lili ndi Fe2+, yomwe ili yotumbululuka yabuluu ndi yobiriwira yotuwa;lili ndi MnO2, yomwe ndi yotuwa;lili ndi zinthu zachilengedwe, zomwe ndi zotumbululuka zachikasu, zotuwa, zabuluu, ndi zakuda.Kukhalapo kwa zonyansazi kumachepetsa kuyera kwachilengedwe kwa kaolin, ndipo mchere wachitsulo ndi titaniyamu umakhudzanso kuyera kwa calcined, kupangitsa madontho kapena mabala mu porcelain.