Mofuta | Feldspar | Feldspar-Molai | Molai Stone | Molai-Corundum | Corundum | |||||
Ntho | ||||||||||
Likahare tsa lik'hemik'hale | Al2O3 | 20-30 | 30-45 | 45-70 | 70-90 | ≥90 | ||||
Al2O3+ SiO2 | ≥90 | |||||||||
Fe2O3 | ≤1 | |||||||||
Khatello ea metsi (%) | ≤5 | |||||||||
Ho hanyetsa asiti (%) | ≥98 | |||||||||
Alkaki resistance (%) | ≥80 | ≥82 | ≥85 | ≥90 | ≥95 | |||||
Thempereichara ea tšebetso (°C) | ≥1300 | ≥1400 | ≥1500 | ≥1600 | ≥1700 | |||||
Matla a ho pshatla | Φ3 limilimithara | ≥400 | ≥420 | ≥440 | ≥480 | ≥500 | ||||
Φ6 limilimithara | ≥480 | ≥520 | ≥600 | ≥620 | ≥650 | |||||
Φ8mm | ≥600 | ≥700 | ≥800 | ≥900 | ≥1000 | |||||
Φ10 limilimithara | ≥1000 | ≥1100 | ≥1300 | ≥1500 | ≥1800 | |||||
Φ13 limilimithara | ≥1500 | ≥1600 | ≥1800 | ≥2300 | ≥2600 | |||||
Φ16 limilimithara | ≥1800 | ≥2000 | ≥2300 | ≥2800 | ≥3200 | |||||
Φ20 limilimithara | ≥2500 | ≥2800 | ≥3200 | ≥3600 | ≥4000 | |||||
Φ25 limilimithara | ≥3000 | ≥3200 | ≥3500 | ≥4000 | ≥4500 | |||||
Φ30 limilimithara | ≥4000 | ≥4500 | ≥5000 | ≥5500 | ≥6000 | |||||
Φ38 limilimithara | ≥6000 | ≥6500 | ≥7000 | ≥8500 | ≥10000 | |||||
Φ50 limilimithara | ≥8000 | ≥8500 | ≥9000 | ≥10000 | ≥12000 | |||||
Φ75 limilimithara | ≥10000 | ≥11000 | ≥12000 | ≥14000 | ≥15000 | |||||
Boima ba bongata (kg/m3) | 1100-1200 | 1200-1300 | 1300-1400 | 1400-1550 | ≥1550 |
Diameter | 6/8/10 | 13/16/20/25 | 30/38/50 | 60/75 |
Mamello ya bophara | ± 1.0 | ± 1.5 | ± 2.0 | ± 3.0 |
Pore bophara | 2-3 | 3-5 | 5-8 | 8-10 |