Vrsta | Feldspar | Feldspar-Molai | Molaijev kamen | Molai-korund | Korund | |||||
Predmet | ||||||||||
Kemična vsebina | Al2O3 | 20–30 | 30–45 | 45–70 | 70–90 | ≥90 | ||||
Al₂O₃ + SiO₂ | ≥90 | |||||||||
Fe2O3 | ≤1 | |||||||||
Adsorpcija vode (%) | ≤5 | |||||||||
Odpornost na kisline (%) | ≥98 | |||||||||
Odpornost na alkalije (%) | ≥80 | ≥82 | ≥85 | ≥90 | ≥95 | |||||
Delovna temperatura (°C) | ≥1300 | ≥1400 | ≥1500 | ≥1600 | ≥1700 | |||||
Drobilna trdnost | Φ3 mm | ≥400 | ≥420 | ≥440 | ≥480 | ≥500 | ||||
Φ6 mm | ≥480 | ≥520 | ≥600 | ≥620 | ≥650 | |||||
Φ8 mm | ≥600 | ≥700 | ≥800 | ≥900 | ≥1000 | |||||
Φ10 mm | ≥1000 | ≥1100 | ≥1300 | ≥1500 | ≥1800 | |||||
Φ13 mm | ≥1500 | ≥1600 | ≥1800 | ≥2300 | ≥2600 | |||||
Φ16 mm | ≥1800 | ≥2000 | ≥2300 | ≥2800 | ≥3200 | |||||
Φ20mm | ≥2500 | ≥2800 | ≥3200 | ≥3600 | ≥4000 | |||||
Φ25 mm | ≥3000 | ≥3200 | ≥3500 | ≥4000 | ≥4500 | |||||
Φ30 mm | ≥4000 | ≥4500 | ≥5000 | ≥5500 | ≥6000 | |||||
Φ38 mm | ≥6000 | ≥6500 | ≥7000 | ≥8500 | ≥10000 | |||||
Φ50mm | ≥8000 | ≥8500 | ≥9000 | ≥10000 | ≥12000 | |||||
Φ75 mm | ≥10000 | ≥11000 | ≥12000 | ≥14000 | ≥15000 | |||||
Gostota v razsutem stanju (kg/m3) | 1100–1200 | 1200–1300 | 1300–1400 | 1400–1550 | ≥1550 |
Premer | 6 / 8 / 10 | 13/16/20/25 | 30 /38 /50 | 60/75 |
Toleranca premera | ± 1,0 | ± 1,5 | ± 2,0 | ± 3,0 |
Premer por | 2–3 | 3–5 | 5–8 | 8–10 |