Performance indices and wash water flow rates

Conditions or actions

Wash water to the rougher spirals: 320 m³/h

Rougher concentrate: 57.2% Fe

Wash water to the cleaner spirals: 650 m³/h

Wash water to the re-cleaner spirals: 650 m³/h

Final Concentrate: 66.1% Fe

Weight recovery to final concentrate: 34.4%

Nominal conditions

Wash water to the rougher spirals: 270 m³/h

Rougher concentrate: 56.8% Fe

Wash water to the cleaner spirals: 650 m³/h

Wash water to the re-cleaner spirals: 650 m³/h

Final Concentrate: 65.8% Fe

Weight recovery to final concentrate: 35.6%

Reduction of the wash water to the rougher:

Objective: Reduce losses of coarse iron oxide particles in the roughers

Wash water to the rougher spirals: 270 m³/h

Rougher concentrate: 56.8% Fe

Wash water to the cleaner spirals: 670 m³/h

Wash water to the re-cleaner spirals: 670 m³/h

Final Concentrate: 66.1% Fe

Weight recovery to final concentrate: 35.1%

Increase of the wash water to the cleaner and re-cleaners:

Objective: Improve cleaning action of the cleaners and re-cleaner spirals.