| Zinthu | Chigawo | Mndandanda | Zachizolowezi | ||
| Kapangidwe ka mankhwala | Al2O3 | % | 41.00-46.00 | 44.68 | |
| ZrO2 | % | 35.00-39.00 | 36.31 | ||
| SiO2 | % | 16.50-20.00 | 17.13 | ||
| Fe2O3 | % | 0.20max | 0.09 | ||
| Kuchuluka kwa zinthu zambiri | g/cm3 | Mphindi 3.6 | 3.64 | ||
| Kuoneka ngati porosity | % | 3.00max | |||
| Gawo | 3Al2O3.2SiO2 | % | 50-55 | ||
| Indined ZrSiO4 | % | 30-33 | |||
| Corundum | % | 5.00pamwamba | |||
| Galasi | % | 5.00pamwamba | |||
Amagwiritsidwa ntchito pazinthu zapadera zomwe zimafuna kukana dzimbiri la chilengedwe komanso kukulitsa kutentha pang'ono.
Ntchito zake zikuphatikizapo machubu oponyera mphamvu ya ceramic ndi mawonekedwe osasunthika omwe amafunikira kukana slag yosungunuka ndi galasi losungunuka.
Njerwa ndi njerwa za Zir-mull zomwe zimagwiritsidwa ntchito mu Makampani Opanga Magalasi komanso zowonjezera mu Continuous Casting Refractories.