Electric-pulse disaggregation (EPD) is a comminution technique that liberates all mineral grains from any rock type, irrespective of its lithology or grain size distribution. Normal mechanical crushing of whole-rock samples is replaced by the effect of an explosion, which is produced by applying an electric current from a high-voltage power source. The sample sits under water in a special crushing-chamber of an original design and construction (SPARK-2, CNT, Russia). The rapid distribution of electric pulses through the sample leads to explosions, which occur preferentially along grain boundaries (zones of weakness). As a result, individual, undamaged mineral grains can be liberated and recovered in their original shape and form regardless of grain size.
- High selectivity of the crushing process that produces an effective separation of mineral grains and crystals from the host rock.
- Retention of the natural unbroken shape and original size of desired mineral grains/crystals.
- The possibility of rapidly crushing rocks of any density and mechanical hardness.
- Low possibility of contamination of final crushed product by outside material due to easy cleaning of the crushing chamber.
- Good control of the grain-size distribution of the crushed product.
|1.||Sample quantity per chamber loading (kg)||kg||up to 15*|
|2.||Maximum sample size||cm||15x10x20|
|3.||Maximum particle size of the crushed products||mm||<1 up to 20|
|5.||Alternating current frequency||Hz||50-60|
|6.||Power consumption||kW/hour||< 2|
|7.||Overall dimensions (height/width/depth)||cm||200/100/200|
|8.||Weight of installation without safety grid||kg||< 300|
|9.||Water consumption per sample||litres||40|
|10.||Productivity||kg/hour||from 10 to 300|
|11.||Hours of continuous operation per day||hours/day||16|
|12.||Working temperature range||°C||from +10 to +30|