Mchenga wamitundu tsopano wagawidwa m'mitundu yachilengedwe, mchenga wothira, mchenga wamitundu yakanthawi ndi mchenga wokhazikika. Makhalidwe ake ndi awa: mtundu wowala, kukana asidi ndi alkali, kukana UV, kusatha. Mchenga wamitundu yachilengedwe: Wapangidwa ndi miyala yachilengedwe yophwanyika, yomwe siitha koma ili ndi zinyalala zambiri; Mchenga wamitundu yakanthawi: mtundu wowala, wosavuta kusintha mtundu.

Mchenga wachilengedwe umapangidwa ndi miyala ya marble kapena granite kudzera mu njira zosiyanasiyana monga kusankha, kuphwanya, kuphwanya, kugawa ndi kulongedza.
Njira yopangira mchenga wofiirira imapangidwa ndi magawo anayi: kusakaniza, kutenthetsa, kuyika calcination ndi kuziziritsa. Imadziwika kuti: mu njira zotenthetsera ndi kuyika calcination, mpweya wotentha woperekedwa ndi ng'anjo yotentha umagwiritsidwa ntchito kutenthetsa ndi kuyika calcination zinthu zosakanikirana mu ng'anjo yotentha ndi ng'anjo yotentha.

Mchenga wamtundu umapakidwa utoto ndi mchenga wa quartz wosalala ndipo uli ndi makhalidwe osatha. Mchenga wamtundu umakwaniritsa zovuta za mchenga wamtundu wachilengedwe, monga mtundu wosawala komanso mitundu yochepa yamitundu. Mtundu wake ndi wolimba, wolimba komanso wosatha.
Makhalidwe opindika

1. Kukula kwa tinthu tating'onoting'ono tosiyanasiyana ndi kofanana, tinthu tating'onoting'ono ndi tozungulira, ndipo tingagawidwe m'magulu mwachisawawa.
2. Mtundu wake ndi wokongola, wokhalitsa komanso wosangalatsa chilengedwe.
3. Kugwirizana bwino ndi ma resin osiyanasiyana.
4. Kukana asidi
5. Kukana kwa alkali
6. Kukana mankhwala osungunulira
7. Kukana madzi otentha

Cholinga chopinda
Mchenga wopaka utoto umagwiritsidwa ntchito makamaka pamitundu yonse ya pansi ya epoxy yamitundu yosiyanasiyana, utoto weniweni wa miyala, zokutira zosiyanasiyana za zomangamanga, bolodi la mchenga, chovala cha asphalt chosinthidwa cha ABS, zinthu zopota zosalowa madzi, ntchito zamanja, ndi zina zotero. Uli ndi mitundu yowala, kukana nyengo, kukana kuwonongeka, kukana asidi ndi alkali, kukana kutsetsereka, kopanda msoko, kokongola kwambiri, ndipo umagwiritsidwa ntchito makamaka pokongoletsa, ntchito zamanja ndi mafakitale ena.