Kuwala Kulemera Kwawo Njerwa Zoyimitsa Dongo

Njerwa yonyezimira yonyezimira yoyaka moto imapangidwa ndi zida zadothi zam'deralo zomwe zimatentha kwambiri, zomwe zimakhala ndi kachulukidwe kakang'ono, mphamvu yayikulu, kutsika kwamafuta komanso kutsika kodetsedwa. Kutentha mu 1200-1400 ℃. Zosakaniza zimasakanizidwa ndi madzi opangidwa ndi pulasitiki kapena matope, matope okhala ndi extrusion kapena kutsanulira mawonekedwe, 1250-1350 ℃ pambuyo pouma kuyaka kwa okosijeni m'mlengalenga. Kuchulukana kwa njerwa zadongo zomwe zimagwiritsidwa ntchito nthawi zambiri ndi 0.75-1.2 g/cm3. Ndi mtundu wa refractory wofunikira pakupulumutsa mphamvu ndi kuteteza kutentha. Njerwa zonyezimira zadongo zopepuka zimatha kugwiritsidwa ntchito m'ng'anjo zachitsulo ndi zitsulo, zitsulo zopanda chitsulo, zida zomanga, mafakitale amagetsi, ndi zina zambiri.

Makhalidwe :
1.Kuchepa kwachitsulo ndi zonyansa zina,
2. High refractoriness,
3. High porosity, low volume density,
4.Kutentha kwabwino komanso kogwiritsa ntchito mphamvu,
5.Kukhazikika kwamphamvu kwamafuta,
6.Kukana komanso kukokoloka kwa nthaka.