Abstract
High Voltage Pulse (HVP) enabled ore preconcentration has the potential to provide large energy savings and upgrade Run-of-Mine ores. The concept is well established in laboratory settings but is yet to be demonstrated at the throughputs needed for industrial uptake of the technology. To scale up this concept from laboratory batch tests to a continuous operation, a novel grizzly-electrode design that integrates pulse discharges for particle breakage and size-based separation into a single step has been patented. In the initial evaluation of the system, two cylindrical electrode bars were adopted with an experiment design to simulate continuous feeding operation. Synthetic particles and a low-grade gold-copper ore were used for the initial evaluation. The evaluation showed pre-concentration can be achieved. Factors affecting the system performance were identified and limitations of the grizzly electrodes are discussed.
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