SOURCE-LED REFERENCE NOTES

Comminution, Bond Work Index (Wi) & Ball/SAG Mill Sizing

Detailed technical article on Bond's Third Law of Comminution, specific grinding energy (kWh/t), and ball mill power calculations.

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Comminution, Bond Work Index (Wi) & Ball/SAG Mill Sizing

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1. Bond's Third Law of Comminution

Fred C. Bond established that the work required to reduce particle size from 80% passing feed (F80) to 80% passing product (P80) is proportional to the crack length produced: W (kWh/t) = 10 × Wi × [ (1 / √P80) - (1 / √F80) ] Where Wi is the Bond Ball Mill Work Index (kWh/t).
PEER-REVIEWED TEXTBOOK & JOURNAL CITATIONS
  • Bond, F. C. (1952). The third theory of comminution. Mining Engineering, 4(5), 484-494. [Access Reference]