Sampling Stations For Material Size Determination
Efficiencies of plant unit process of furnace operations are critical to ensuring overall production is optimised and costs both contained and even reduced. Material suppliers need check that material size specifications are adhered to and so avoid contractual penalties. Payments premiums for "sweeter" specifications than stipulated, can also be realised. Automatic screening and weighing of sampled material from belt conveyors provides convenient means of measuring and controlling effects on downstream processes. Corrective action by operations staff can thus allow improved plant performance.
Applications
- Ore size reduction circuits e.g. crusher efficiency checks.
- Furnace feedstock in smelting processes e.g. identify undesirable presence of fines or other material size fractions.
- All critical material size applications existing between supplier/customer interface in the mining and minerals industry.
Benefits
- Determination of up to 6 different material size fractions via a multi- tier vibrating screen.
- Avoid penazltiers associated with contractual agreements for out-of-specification material.
- Save on process plant wear and tear spares e.g. mill liners, by ensuring cruncher section is operating efficiently.
- Furnace bed permeability maintained by blending techniques if undersize feed materials is detected.
- Monitor furnace feedstock material for correct addition ratios e.g. ferroalloys and reactants.
PLC Control Philosophy
- Start vibratory screen.
- Initiate primary sampler to take a cut.
- Allow time for screening process - stop screen.
- Take mss measurements and translate 4 - 20 mA signal to mass ratios (%).
- Discharge weighing trays.
- Start skip hoist.
- Dump weighed material.
- Return skip hoist to park position.
- Reset weighing system to zero.
- Timer to initiate new cycle.
