Mining Bond Work Index: mill_performance
Bond work index (Wi, kWh/ton) for 29 mineral and ore types, crusher performance parameters (jaw, gyratory, cone, HSI, VSI, roll, HPGR), and grinding mill design parameters (ball, SAG, AG, rod, vertical roller). Sources: Bond (1961), SME Mineral Processing Handbook 2019, Wills Mineral Processing Technology 8th Ed.
| parameter type | record id | Bond work index kWh per ton (kWh/ton) | Mohs hardness (dimensionless) | abrasion index Ai (dimensionless) | ball charge pct (%) | circulating load pct (%) | mill diameter ft (ft) | mill speed pct critical (%) | mill type | mineral or ore | notes | specific energy kWh per ton (kWh/ton) | specific gravity (dimensionless) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mill_performance | Bauxite|ball | 9.5 | 2.5 | 0.04 | 30 | 150 | 12 | 70 | ball | Bauxite | Ball mill for bauxite; soft ore; low Ai so minimal ball wear; 70% Nc; 30% ball charge | 5 | 2.36 |
| mill_performance | Coal|ball | 13 | 2 | 0.07 | 35 | 200 | 12 | 70 | ball | Coal | Coal ball mill (wet grinding for slurry pipelines); low SG; 70% Nc; 35% ball charge; specific energy lower due to soft material | 6.5 | 1.35 |
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