Alumina Ceramics
ORTB Series — Alumina Grinding Ball
5 grades of high-density alumina grinding balls (Al₂O₃ 92–97%) for wet and dry milling. Diameters 10–100 mm, self-wear loss ≤0.005–0.010% per 24 h. Up to 24 MT per 20' FCL.
Available sizes
Ø 10 mmØ 20 mmØ 30 mmØ 40 mmØ 50 mmØ 60 mmØ 70 mmØ 80–100 mm (on request)
Variants
ORTB-92 / 92S (wet milling)ORTB-92D (dry milling only)ORTB-95 (wet & dry)ORTB-97 (wet & dry)
Performance Index
| Property | ORTB-92 | ORTB-92S | ORTB-92D | ORTB-95 | ORTB-97 |
|---|---|---|---|---|---|
| Al₂O₃ (%) | ≥92 | ≥92 | ≥92 | ≥95 | ≥97 |
| Mohs hardness | 9 | 9 | 9 | 9 | 9 |
| Water absorption (%) | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 |
| Bulk density (g/cm³) | ≥3.63 | ≥3.63 | ≥3.60 | ≥3.68 | ≥3.73 |
| Self-wear loss (%/24h) | ≤0.010 | ≤0.005 | ≤0.008 | ≤0.010 | ≤0.010 |
| Application | Wet grinding | Wet grinding | Dry grinding only | Wet & Dry | Wet grinding |
ORTB Series alumina grinding balls deliver superior performance in ceramic, mineral, pharmaceutical, paint and chemical processing applications.
STANDARD DIAMETERS
10 / 20 / 30 / 40 / 45 / 50 / 60 / 70 mm
Diameters 80 / 90 / 100 mm available on request.
PACKAGING
25 kg PP bag or 500/1000 kg big bag
20–24 MT per 20' FCL
NOTE: ORTB-92D is formulated exclusively for dry grinding. Using it in wet conditions will accelerate wear.
Gallery
