The initial, pilot scale Applied Sorting x-ray machine (see photo attached) is currently running bulk samples in Perth and is providing excellent results in terms of waste rejection and tungsten recovery over ore samples with a wide range from +5 mm to 100 mm square mesh in size.
In these pre-concentration tests an averaged overall rejection of 55.2% of the feed material was achieved at an extremely satisfactory “throw-away” tailings grade of 0.027% WO3.
Applied Sorting Technologies spokesman Peter Hawkins says that “X-ray ore sorting can be applied to a wide range of mineral types as well as the tungsten ores, scheelite and wolfram.
The x-ray sorting machines can to look inside the rocks, add up the weight of the valuable particles and decide whether a particular rock should be accepted or rejected.”
In addition, the lack of optical sensors means that the feed can be dusty, muddy or clean, wet or dry and still be successfully sorted.
X-ray sorting machines have been used widely for many years in diamond recovery.
The founders of Applied Sorting Technologies were responsible for developing and building x-ray sorting machines still being used by Argyle Diamond Mines while they were employees of CRA Group Special Equipment unit.