VDMA

Germany 2019

Best of Germany 2014 - Mining Equipment and Mining Technology

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VDMA 9 2019 • VDMA MINING SUPPLEMENT from 80 mm to less than 1 mm are to be efficiently separated, concen- trated and cleaned. The allmineral plant operates automatically. Iberian Resources' tungsten and tin mining operation, located near La Parrilla in southwest Spain, is using allmineral technology to optimize the quality of its raw material. Two high-output alljig fines jigs will serve as the core for a preconcentration process and help double the annual output to 5,000 mt per year (mt/y) and ensure a consistently high-quality product. The object is to achieve a precon- centration yield of at least 90% from the scheelite ore stream. This will also reduce the mass flow rate by 55%. Iberian Resources expects to see results when the project is commissioned in the beginning of 2019. In this case, allmineral is not just providing the preconcentra- tion plant. "We are providing the entire beneficiation plant, which also consists of spirals, shaking tables, dryers, electrostatic separators and flotation circuits," Steinberg said. "We are also looking in the direction to possibly add more products in our portfolio by investing in R&D." Looking toward the future, Steinberg said allmineral is currently developing some new ideas. "Beyond adjusting equipment perfor- mance, we are looking at alternative technologies to replace the nuclear source at our fully controlled allair dry jig," Steinberg said. "This would be a breakthrough because the miners would not have to deal with all of the safety regulations anymore." allmineral has also developed a prototype in-pit beneficiation plant that may increase coal recovery tremendously. "The focus on this in-pit beneficiation technology is currently for coal," Steinberg said. "We have a relocatable unit that does everything in the pit. Our customers are telling us we are on the right track with this in-pit strategy." Especially for this purpose, allmineral brought a mining engineer on board with mining and contractor experience to oversee the project. "When you take a close look at production costs, 90% is mining and 10% is beneficiation," Steinberg said. "Currently, we can only save 2% to 5% off a very small slice. We could have a much bigger impact on the mining side. Looking at haulage alone, which is the largest cost, if we could make a 2% to 5% impact there, then we would be talking about a significant savings for the customers." When Steinberg joined allmineral more than two years ago, the market conditions were weak due to the cyclic nature of the industry. "At that time, we knew we needed to find a solution to offset these market swings and made the decision to migrate to the position of being a solutions provider," Steinberg said. In 2017, the tide changed, the company increased its order intake, and they now have some air to breathe and can turn their attention to development. Magnetic Separation and Sorting For 130 years, Steinert has been supplying large magnetic systems for industrial applications. The mining industry relies on magnetic separation to recover minerals as well as tramp metal from process- ing streams. More recently, the company has developed an extensive line of sorting equipment, which is another form of separation that uses X-ray technology (XRT). Sorting systems retrieve higher grade ores from the product streams, reducing the amount of rock that is processed and the costs associated with it. Magnetic separators remain the most important product line for Steinert. "We recently received an order from BHP for the South Flank mine for a little less than A$1 million for three large magnets," said Kai Bartram, head of mining, Europe, Asia and Africa for Steinert. "We worked with Jacobs on the Oyu Tolgoi mine in Mongolia and won an order for A$1.9 million for four big tramp metal-removal magnets. Magnets are our bread and butter." In the last two years, however, mining companies have shown greater interest in ore sorting. "For the mining sector, sorting is no longer viewed as a niche product," Bartram said. "We are seeing more mining companies include sorting in their mineral processing systems from the beginning. These companies are always looking for ways to improve efficiency and save energy or processing costs." Steinert now has nearly 100 sorters in the field. "They are real- ly popular with both gold and copper mining operations," Bartram said. "One of the big advantages with Steinert's ore sorting systems is that they are dry processes, which aligns well with the desire to reduce or eliminate water from any mining facility." Future low-grade sorting projects will require higher capacities. "The biggest challenge is not the capacity," Bartram said. "Instead, the limiting factor will likely be the capability of the sensors to de- tect those lower grades." By focusing on the sensors, or a combina- tion of sensors and different detection methods, Bartram believes that there is room for improvement. For 18 years, Bartram has been on a quest to implement sorting in the mining business. He now takes solace in the fact that he no longer needs to convince mining companies as to whether it makes sense or not. Sorting is now an accepted tool that helps streamline the flowsheet and reduce the initial capital investment. JOEST Celebrates 100 Years of Screening Success Similar to many successful Germany companies, JOEST is privately held and this year it will celebrate its 100-year anniversary. After four generations, the Joest family, the namesake, sold the company 20 years ago to another private owner, who set the company on a course to become a truly international supplier of vibratory screen- ing equipment. At that time, JOEST was exporting machines and the company began to establish subsidiaries in foreign outposts. They started with an Australian subsidiary in Perth in 2001 serving the mining market, and today they have 10 subsidiaries outside of Ger- many — at least one on each continent. "We took a very steady, deliberate path," said Dr. Marcus Wirtz, managing director, JOEST. "A hundred years later, we are still mostly vibratory equipment and we're the biggest. We started small and now we have a complete line of vibratory feeders and screening ma- chines, not just large screens, but small and medium screens, too, with all of the motions: linear, circular, flip-flow, etc." Wirtz knows screens and screening machines and he also un- derstands the many industries JOEST supplies. He is board member of VDMA metallurgy division and chairman of its department of pro- cessing technology. He spent a considerable amount of time estab- lishing those subsidiaries worldwide, including a center of excellence for mining in Perth, as well as an extensive assignment in Chicago Sorting systems, such as the one from Steinert above, divert waste from the processing stream and reduce the load on the plant.

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