A matsayin wani nau'in tokar dutsen mai aman wuta, metakaolin kyakkyawan madadin siminti ne saboda ƙarancin amfani da makamashi da ƙarancin gurɓataccen muhalli yayin aikin calcination, da kuma ikonsa na inganta wasu halaye na simintin Portland, kamar ƙarfi da juriya, lokacin da aka yi shi da siminti mai gauraye. A cikin 'yan shekarun nan, masana da yawa sun himmatu wajen nazarin aikin tokar dutsen mai aman wuta na kaolin. Wannan labarin ya bayyana mafi kyawun zafin calcination da lokacin kaolin, abubuwan da ke shafar aikinsa, da hanyoyin gano halaye da ayyukan kaolin. Nazarin da aka yi a baya sun nuna cewa mafi kyawun zafin calcination da lokacin kaolin suna da tasiri ta hanyar abubuwa kamar abun da ke cikin ma'adinai, lu'ulu'u, da abun cikin kaolin, daga cikinsu lu'ulu'u na tsarin kaolin yana da babban tasiri akan aikinsa bayan calcination. An yi amfani da XRD, TG-DTA, IR da sauran hanyoyi don nazarin halayen ma'adinan da ba a sarrafa ba. An ƙayyade ayyukan kaolin ta hanyoyi kamar gwajin Frantini, gwajin conductivity, da ma'aunin ƙarfin aiki. Mafi daidaito hanyoyin sune gwajin Frantini da gwajin ma'aunin ƙarfin aiki.
Metakaolin (wanda aka rage masa suna MK) silicate ne na aluminum wanda ba shi da ruwa (Al2O3 • 2SiO2, AS2) wanda aka samar ta hanyar bushewar kaolin (Al2O3 • 2SiO2 • 2H2O, AS2H2) a yanayin zafi mai dacewa (600-900 ℃). Kaolin yana cikin tsarin silicate mai layi, kuma ana haɗa layukan ta hanyar haɗin van der Waals, tare da ions OH da aka ɗaure sosai a cikinta. Lokacin da aka dumama kaolin a cikin iska, yana fuskantar canje-canje da yawa na tsari. Lokacin da aka dumama shi zuwa kusan 600 ℃, tsarin kaolin mai layi yana lalacewa saboda bushewa, yana samar da matakin canji tare da ƙarancin lu'ulu'u - metakaolin.
Saboda tsarin kwayoyin halitta na metakaolin mara tsari, yana nuna yanayin narkewar thermodynamic kuma yana nuna halayen siminti a ƙarƙashin kuzari mai dacewa. Metakaolin wani abu ne mai aiki sosai na tokar aman wuta wanda zai iya amsawa da Ca (OH) 2 (CH2) da ruwa don samar da samfuran ruwa kamar siminti. Ta hanyar amfani da wannan fasalin, lokacin da aka yi amfani da shi azaman cakuda siminti, yana iya amsawa da CH2 da aka samar yayin aikin shayar da siminti, wanda zai iya inganta wasu kaddarorin siminti.
Metakaolin (MK) wani samfuri ne da ake samu ta hanyar bushewar kaolin a yanayin zafi mai yawa, kuma zafin calcination na iya shafar aikin samfurin.
Lokacin da zafin jiki ya tashi sama da 950 ℃, samfurin ya fara yin lu'ulu'u kuma ya canza zuwa mullite da cristobalite,
Zai rasa aikin ruwa.
Calcined kaolin wani abu ne da ake amfani da shi a masana'antar kera kayan polymer kamar roba, robobi, da kuma rufin da ba su da sinadarai. Yana iya rage farashin waɗannan samfuran, musamman inganta halayen zahiri da na sinadarai na kayan.