Chiyambi cha njerwa zotchingira dongo

Njerwa zotchinjiriza dongo ndi zinthu zotchingira zotchinga zomwe zimapangidwa kuchokera ku dongo losasunthika monga zida zazikulu. Zomwe zili mu Al2O3 ndi 30% -48%.

Wamba kupanga ndondomeko yanjerwa zotchingira dongondi njira yowonjezeramo yoyaka ndi mikanda yoyandama, kapena njira ya thovu.
Njerwa zotchinjiriza dongo zimagwiritsidwa ntchito kwambiri pazida zotenthetsera ndi ng'anjo zamakampani, ndipo zitha kugwiritsidwa ntchito m'malo omwe kulibe kukokoloka kwamphamvu kwazinthu zosungunuka zotentha kwambiri. Malo ena omwe amalumikizana mwachindunji ndi malawi amakutidwa ndi zokutira zotchinga kuti achepetse kukokoloka kwa slag ndi fumbi la gasi la ng'anjo, kuchepetsa kuwonongeka. Kutentha kwa ntchito ya njerwa sikuyenera kupitirira kutentha kwa mayeso okhazikika kusintha kwa mzere pa kutenthedwa. Njerwa zotchingira dongo zimakhala zamtundu wazinthu zopepuka zotchinjiriza zokhala ndi ma pores angapo. Nkhaniyi ili ndi porosity ya 30% mpaka 50%.