Njerwa ya Clay

Njerwa zadongo zimakhala ndi mawonekedwe olimba kwambiri, mphamvu zabwino, kukhazikika kwamphamvu kwamafuta, komanso kukana kuzizira kofulumira komanso kutentha. Komanso, dongo refractory njerwa akhoza kukana kukokoloka kwa acidic slag kumlingo wakutiwakuti. Pakugwiritsiridwa ntchito, njerwa zadongo zotsutsa ndizotsika mtengo, zimakhala ndi zotsatira zazikulu, ndipo zimagwiritsidwa ntchito kwambiri.