The Asia Miner

OCT-DEC 2018

The ASIA Miner - Reporting Important Issues to Mining Companies in the Asia Pacific Region

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the asia miner • volume 15 • issue 4 20 WASTE TO ENERGY EnviroLeach Technologies announced that new upgrades and enhancements to the EnviroLeach process have yielded posiঞve results in a series of bulk tests. The technology company and near-term gold producer is engaged in the development and commercialisaঞon of environmentally-friendly formulas and technologies for the treatment of materials in the mining and e-waste sectors uঞlising its non-cyanide, near neutral pH treatment process to extract precious metals from ores, concentrates, and e-waste. The modificaঞons and enhancements to the EnviroLeach process, which included the addiঞon of a proprietary 3 stage concentraঞon process and minor formula modificaঞons, have delivered significant improvements in performance and recoveries. The company has completed several lab to pilot scale and full-scale tests to confirm the results of these modificaঞons on various low to mid-grade circuit boards with posiঞve results. The results of the bulk tesঞng indicate that the gold (Au) was almost evenly distributed between both the heavy (56 per cent) and light fracঞons (44 per cent), with all other metals predominantly reporঞng to the heavy (concentrate) fracঞon. The resulঞng concentrate represented approximately 30 per cent of the original mass with copper grades in the plus 80 per cent range, gold at 400 g/t, silver at 2,450 g/t and palladium at 150 g/t. The light fracঞon contained a gold grade of 185 g/t with recoveries in the EnviroLeach soluঞon in the plus 80 per cent range. EnviroLeach Technologies CEO, Duane Nelson, said that the recent bulk sample results exceeded the company's expectaঞons. "We are confident we can replicate these results in our first 20 tonne per day concentrate plant currently under construcঞon", he said. The Company also announced that its partner, Mineworx Technologies, has leased a facility in Vancouver, Canada to construct and assemble a 20 tonne per day e-waste concentrate plant. Both companies are preparing the facility for the arrival of the primary process equipment. "These combined faciliঞes will quadruple the capacity of Mineworx' e-waste fabricaঞon and producঞon capabiliঞes to almost 28,000 square feet," Commented Greg Pendura, CEO. "This expansion now enables Mineworx to move quickly upon the site acceptance of the Memphis, Tennessee E-Waste processing plant to immediately expedite our business model in this dynamic sector." "I am very pleased with both the EnviroLeach and Mineworx teams' conঞnued ability to overcome the pioneering challenges we face in this relaঞvely new sector. The team's extensive experience in convenঞonal mining, chemistry and metallurgical process has proven quite valuable in this fusion of technologies," added Mr Nelson. EnviroLeach strikes gold in e-waste The Commonwealth Scienঞfic and Industrial Research Organisaঞon (CSIRO) has developed an analyser that promises to slash energy and water use in copper mining operaঞons. Taking advantage of magneঞc resonance technology, the analyser rapidly idenঞfies 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 illuminaঞng batches of ore with short pulses of radio waves, magneঞc resonance penetrates through copper ores to rapidly and accurately detect ore grade. It has an advantage over other ore sorঞng analysers that can o[en only go "skin deep" to detect mineral parঞcles on the surface of ore, producing less reliable results. While the producঞvity benefits vary depending on the characterisঞcs of the orebody, the analyser has the potenঞal to more than double average ore grades once sorted. It could represent as much as a 20 per cent reducঞon in processing costs in some copper mines. In addiঞon to copper, the magneঞc resonance analyser can be applied to gold and iron-bearing ores. The analyser is available to the internaঞonal copper market through NextOre, developed by CSIRO in associaঞon 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 idenঞfied 59 mature copper mine sites where the analyser could be applied to extend their life, capturing 35 per cent of global copper producঞon. "The soluঞon could also enable undeveloped, low grade mines to be brought into producঞon, 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 sorঞng soluঞons, including technical and engineering advice, to move from concept to site trials and final implementaঞon. CSIRO's scanner promises to reduce copper waste CSIRO breakthrough scanner promises to reduce copper waste

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