Grindability Assessment Using Particle Size or Particle Surface Area

CIM Edmonton 2004
Dwayne Tannant,
Abstract The energy required to fragment a rock is proportional to the increase in the fracture surface area and hence is proportional to the rock’s surface area. In comminution, the slope of the linear relationship between size reduction ratio and specific energy is usually defined as grindability. Another definition of grindability based on newly created specific surface area and specific energy is introduced. The two definitions for grindability reflect the grindability properties of rocks and can be used to measure of the efficiency of mills or crushers. The feed particle size distribution influences the energy needed to comminute the rock. For a given ratio of average feed size to product size, the smaller feed size requires more energy.
Keywords: Grindability, Specific surface area, Comminution, reduction ratio, Energy
Full Access to Technical Paper
PDF version for $20.00
Other papers from CIM Edmonton 2004