Specific energy consumption models
Specific Energy Consumption Models
Specific Energy Consumption is the most common way of describing how much energy is used by grinding, and is the basis of the throughput estimations in SAGMILLING.COM. It is usually expressed as kWh/t (kilowatt-hours per tonne).
Models of this type assume a standard particle size distribution and use a single position on that particle size distribution to characterize the entire curve. The most common way to express this is the 80% passing size, which can be expressed as F80 (feed stream 80% passing size), P80 (product stream 80% passing size), or K80 (generic stream 80% passing size. Bond (1952) describes the rationale for using a single 80% passing size and indicative of the whole size range.
Models are arranged into classes, depending on the theory they are implementing. The models within a class usually almost entirely the same except that each implement a particular feature or default setting.
- (Default) Optimized Bond/Barratt Model SABC (including phantom cyclone)
- (Default) Optimized Bond/Barratt Model SAB (including phantom cyclone)
- Raw Bond/Barratt Model (no phantom cyclone)
The Optimized model should be used in most situations. The Raw model is provided for situations with especially hard rock that is difficult to SAG mill – specifically situations where the crushing work index or rod mill work index is significantly greater than the ball mill work index.
Bond + Pilot Plant Models
warning - experimental model
This models requires an HPGR pilot plant test (bench-scale HPGR tests also work) plus the three Bond work index values: Low-energy impact crushing work index, rod mill work index and ball mill work index.
- HPGR and ball mill (using Bond and an HPGR pilot plant)
- Model:Morrell SMC SAG SAB and SABC
- Model:Amelunxen SGI SAB and SABC (similar to SPI™)