The Commonwealth Scientific and Industrial Research Organisation (CSIRO) has developed an analyser that promises to slash energy and water use in copper mining operations.
Taking advantage of magnetic resonance technology, the analyser rapidly identifies ore grade so that large volumes of waste rock (gangue) can be rejected before it enters the plant, significantly reducing the amount of energy and water needed for processing.
By illuminating batches of ore with short pulses of radio waves, magnetic resonance penetrates through copper ores to rapidly and accurately detect ore grade.
It has an advantage over other ore sorting analysers that can often only go "skin deep" to detect mineral particles on the surface of ore, producing less reliable results.
While the productivity benefits vary depending on the characteristics of the orebody, the analyser has the potential to more than double average ore grades once sorted.
It could represent as much as a 20 per cent reduction in processing costs in some copper mines. In addition to copper, the magnetic resonance analyser can be applied to gold and iron-bearing ores. The analyser is available to the international copper market through NextOre, developed by CSIRO in association with RFC Ambrian and Advisian Digital.
“Bringing the analyser to market through NextOre opens up the opportunity to transform the global copper industry and reduce its environmental footprint,” CSIRO research director Nick Cutmore said. “NextOre has identified 59 mature copper mine sites where the analyser could be applied to extend their life, capturing 35 per cent of global copper production.
“The solution could also enable undeveloped, low grade mines to be brought into production, so the economic benefits are huge.”
In its first year, NextOre will focus its efforts on engaging the South American and Canadian market. NextOre CEO Chris Beal said the company was providing full ore sorting solutions, including technical and engineering advice, to move from concept to site trials and final implementation.