
An yi ƙwallon yumbu mai adana zafi da alumina na masana'antu da kuma kaolin mai hana ruwa shiga a matsayin manyan kayan masarufi. An tsara shi a kimiyyance, an tsara shi kuma an yi masa siffa a yanayin zafi mai yawa. Yana da kyawawan halaye:
1) Babban ƙarfin injina da tsawon rai na aiki;
2) Kyakkyawan kwanciyar hankali na sinadarai, babu amsawar sinadarai da kayan aiki;
3) Kyakkyawan juriya ga zafin jiki mai yawa, mafi girman zafin juriya ga zafi zai iya kaiwa 1900℃.
| Abu | Kwallo mai sanyi ta ajiya | Kwallon ajiya mai zafi |
| Al₂O₃ (%) | 20-30 | ≥65 |
| SiO₃+Al₂O₃(%) | ≥90 | |
| Fe₂O₃(%) | ≤1 | ≤1.6 |
| Girman (mm) | 10-20/20-40 | 16-18/20-25 |
| Ƙarfin zafi (J/kg.k) | ≥836 | ≥1000 |
| Maida wutar lantarki (w/mk) | 2.6-2.9 | 2-4 |
| Juriyar girgiza mai zafi (℃) | 800 | 1000 |
| Rashin juriya(℃) | 1550 | 1750 |
| Asarar Ragewar Haɗari (%) | ≤0.1 | |
| Taurin Mohs (scale) | ≥6.5 | |
| Ƙarfin murƙushewa (N) | 800-6000 | 1800-3800 |
| Yawan yawa (kg/m3) | 1300-1400 | 1500-1600 |