Annual Meeting Preliminary Program - Full Brochure (PDF) - SME

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TECHNICAL PROGRAM Silica sand is processed by crushing, grinding, screening, classification, attrition scrubbing, and in some cases magnetic separation. Typical product yields would be 60-75-80% or more. Cooperative approach between Universities and industry could go a long way in benchmarking the scale of operation and therefore the mining and processing technology. In this context, current processing of industrial minerals in India will be discussed, and alternative technologies for processing will be presented. 11:05 AM Fluorspar (CaF2) Beneficiation Plant Design: A Basic Approach S. Kumar and S. Bhattacharya; Fuel & Mineral Engineering, Indian School of Mines, Dhanbad, India Fluorspar is widely used in aluminium, iron and steel industries and to manufacture hydrofluoric acid. World reserves of fluorspar are estimated at 230Mt of which 16Mt (16% to 30% CaF2) is in India. The plant under discussion produces acid grade (CaF2 > 97%) and metallurgical grade (CaF2: 60 - 85%) concentrates. The process consists of crushing by jaw crusher and HPGR, wet screening of HPGR product, flash flotation of wet screen underflow, closed circuit grinding of wet screen overflow, two stage flotation followed by magnetic separation for acid grade concentrate, separate dewatering circuits for both grades of concentrate and tailing disposal. The design approach would be useful for other upcoming fluorspar beneficiation plants. Industrial Minerals & aggregates: Sustainability in Industrial Minerals & aggregates 9:00 AM • Wednesday, February 27 chairs: F. Heivilin, HGPS, LLC, Thomasville, GA B. Li, Michigan Technological University, Houghton, MI 9:00 AM Introductions 9:05 AM Rare Earths Not Rare Anymore F. Heivilin; Exploration, HGPS LLC, Thomasville,, GA As of July 6, 2012 Technical Metal Resourches (TMR) was trackingr 440 rareearth deposits being developed by 265 companies in 37 countries. This is rising rapidly and will change upward monthly. Only a few of these can go into production. China is still in the drivers seat in Light Rare Earth (LREO) Production with 35 million tons in reserves. the problems is not if rare earths will be availible. The question is which deposits can product rare-eqarths safely, at lowest cost, and in balance with usage. China, Lynas at Mount Weld, Molycorp at Mounatian Pass, and Rare Earth Resources at Bear Mountain are in production or ready to move into production, but even they can be hurt by other deposits with lower costs. Eliminating the perception of health and safety problems as experienced in China, the U. S. and Malaysia will be the key to future successes. 9:25 AM Industrial Mineral Sustainability Opportunities F. Heivilin; HGPS, LLC, Thomasville, GA Three billion people are going to move into citiesby 2050. The problem is not if the material is availible, but how we are going to permit it and permit it and produce it in a sustainable manner. In other words, produce it with the lowest possible carbon footprint, help the economics of the community before, during and after mining, conserve and enhance the supply of clean water, and recycle as much material as possible. Permiting is the #1 challenge. The closer to the point of use, the lower the transportation cost for aggregate, sand, and gravel. The quality of reclamation, noise and dust control, selling the pre-mining and post mining use are important to getting permitting for all minerals. Being ableto enhance the water supply and reduce the carbon footprint before, during, and after mining will help sell the permit. The economic and environmental aspects of pre and post mining are important. new technology is also important. 9:45 AM Beneficiation of Low-grade Limonite Ore by HIMS-Cationic Reverse Flotation and Magnetic Roasting-LIMS Techniques X. Liu, W. Chen, L. Luo and W. Liu; Department of Mineral Resources Exploitation Engineering and Technology, Changsha Research Institute of Mining and Metallurgy, Changsha, China Limonite is a general term for a group of amorphous iron oxide and iron hydroxide materials. It is considered as one of the very refractory iron ore types due to its wide variation in chemical composition, iron content, moisture content and easily sliming in the course of comminution. Iron grade of tested sample is 25.48%, the iron minerals are mainly limonite, and the gangue minerals consist of quartz and feldspar in majority, secondarily silicate minerals. In this testwork, high intensity magnetic separation (HIMS)-cationic reverse flotation and magnetic roasting-low intensity magnetic separation (LIMS) tests were conducted on limonite ore. The test results show that the concentrate with iron grade of 50.97% and recovery of 68.50% can be obtained by HIMS-cationic reverse flotation technique; while using magnetic roasting-LIMS technique, the better concentrate indexes of iron grade of 60.36% and recovery of 89.71% are achieved, and the iron grade of tailing is only 4.42%. Therefore, the magnetic roasting-LIMS technique is a better suitable method for beneficiation of low-grade limonite ore. 10:05 AM Vermiculite Sustainability in a Changing World E. Moeller; Nanoparticle Consultancy, LC, Inverness, CA Vermiculite is a classic high value added industrial mineral, providing many unique benefits to the markets in which it is utilized. Sustainability is a commitment to stakeholders and the environment; and is measured socially, economically and environmentally. The vermiculite industry has developed metrics and processes to promote sustainability wherever vermiculite is used in the world. Successes are highlighted with real world examples. 10:25 AM Sustainable Applications of Stamp Sand in Keweenaw Peninsula of Michigan B. Li 1 , R. Hodek 1 , J. Hwang 1 , D. Popko 2 and J. Drelich 1 ; 1 Michigan Technological University, Houghton, MI and 2 Lesktech Ltd, Lake Linden, MI In the region of Keweenaw Peninsula of Michigan, approximately 5 million tons of copper tailing waste, called stamp sand, was dumped in the interior waterways and along the shorelines of Lake Superior. Mineralogical studies have shown that the stamp sand is primarily basaltic, granular form, and contains with high concentration of copper (0.2-0.6wt %). To enhance the ecosystem of Lake Superior, removing this mining waste material from the waterways and the lake would be helpful. Researches have demonstrated that the stamp sand has excellent antimicrobial activity. The granules sized between 8 and 40 mesh are ideal material for manufacturing of antimicrobial roofing shingles. The coarse granules and fines, respectively, are also suitable to other industrial applications. This study exhibited a sustainable approach for environmental restoration by permanent removal and consumption of stamp sand. Meanwhile, the problematic waste being a contamination source will become a resource for value-added products. 10:45 AM The Future of Potash: Fortune or Misfortune? H. Ewaschuk; Runge Mining (Canada) Ltd, Toronto, ON, Canada When shortages of a commodity are anticipated, much thought is devoted by the existing and would-be players on when, how much and where to invest the billions of dollars required for major developments. For years, capacity for producing one of the key crop nutrients, potash, has been in over supply. Despite this, discipline within the industry has kept prices buoyant. With growing demand the end of overcapacity and the possibility of shortages was imminent. Demand in 2008 drove the spot price of potash to almost $900 per metric ton of KCl, compared to under $200 per metric ton just a year and a half earlier. Over the past few years, old and new participants have invested billions of dollars for new capacity. Not since the late 1960s has there been so much capital investment in potash production. Recent and anticipated future trends in demand that have motivated these large expenditures, the major expansions already completed or started, as well as those that are expected to be developed in the next few years, are reviewed. The big question for those investing huge sums is whether the previous production discipline can be maintained to keep prices buoyant in coming years. This is the Technical Program as of September 1, 2012. IT IS SUBJECT TO CHANGE. 101 Please see the Onsite Program for final details.
TECHNICAL PROGRAM 11:05 AM Non-Metallic Minerals Industry in China Z. Zhang and Y. Cao; China Non-metallic Minerals Industry Association, Beijing, China During the past few decades, Chinas non-metallic minerals industry experienced a fast growth in mining, manufacturing, equipment upgrade, technology modernization, and higher value-added products development, etc. In 2010, nationwide turnover of non-metallic industry reached RMB 386 billion, and 15% annual growth is expected in next 5 years. The fast pace of non-metallic minerals industry in China will be continuous in the coming years. Comparing to industrial minerals business in North America and Europe, Chinas non-metallic minerals industry needs to make great efforts to catch up in terms of EHS management in mining and manufacturing operations, new generation products development, consistent quality of products, cost effective production, consolidation of small business in non-metallic industry, and environmental sustainability. China Non- Metallic Minerals Industry Association, as an industrial leader and nonprofit organization, plays a significant role in conducting non-metallic mineral industry in the country. Innovation in Metallurgical Processing Symposium: Separations Innovation II 9:00 AM • Wednesday, February 27 Innovations in Ore Sorting Bo Arvidson, Bo Arvidson Consulting LLC Innovations in Magnetic Separation Bo Arvidson, Bo Arvidson Consulting LLC Innovations in Electrostatic Separation Steve Hearn Innovations in Gravity Separation Rick Honaker, University of Kentucky Innovations in Dense Medium Separation Tim Napier-Munn, Julius Kruttschnitt, Mineral Research Ctr Innovations in Coal Processing Jerry Luttrel, Virginia Poly. Inst. and State University Innovations in Phosphate Processing Brij Moudgil, University of Florida Innovation in Metallurgical Processing Symposium: hydrometallurgy Innovations II 9:00 AM • Wednesday, February 27 Innovations in Zinc Lead Processing Tim Robinson, Republic Alternative Technologies Inc. Doug Zunkel, AD Zunkel Consults Inc. Innovations in Nickel and Cobalt Hydrometallurg Corby Anderson, Colorado School of Mines Innovations in Water and Brine Treatment Larry Lien, Harrison Western Construction Corp. Innovations in Aluminum Processing Joe Angiers Innovations in Rare Earths Processing Karl Gschneidner, Iowa State University Innovations in Tailings Management Dirk van Zyl, University of British Columbia The Future of Hydrometallurgy Corby Anderson, Colorado School of Mines Mineral & Metallurgical Processing: hydrometallurgy 9:00 AM • Wednesday, February 27 chairs: C. Green, Freeport McMoRan Copper and Gold, Safford, AZ J. Steeples, Freeport McMoRan Copper & Gold, Morenci, AZ P. Keyser, FLSmidth Salt Lake City Inc., Midvale, UT J. Lee, Barrick Gold North America, Salt Lake City, UT 9:00 AM Introductions 9:05 AM Enargite Treatments and Application to Pressure Oxidation of Concentrates K. Conner and C. Anderson; Metallurgical & Materials Engineering, Colorado School of Mines, Golden, CO Due to increasingly stringent worldwide environmental regulations for gaseous, aqueous and solid waste emissions, conventional smelting technology causes difficulties when treating materials containing arsenic. Many globally significant copper properties have copper sulfide mineralogy that has a high arsenic content present as enargite. Often, the enargite is present as very large resources with significant amounts of contained precious metals. As global copper, silver and gold demand increases while significant world resources decrease, treatment of sulfide orebodies with enargite is becoming increasingly important. A review of enargite treatment technologies will be discussed as well as a basic overview of an evaluation of the selective dissolution and fixation of arsenic while leaving behind a clean copper and precious metals-bearing solid concentrate suitable as a smelter feed. 9:25 AM Spectroelectrochemistry of Enargite I: Reactivity in Alkaline Solutions R. Gow 2 , C. Young 1 , G. Hope 3 and Y. Takasaki 4 ; 1 Met & Mat Eng, MT Tech, Butte, MT; 2 Hydrometallurgy Research Group, FLSmidth, Salt Lake City, UT; 3 Chemistry Department, Griffiths University, Brisbane, QLD, Australia and 4 Engineering & Resource Science, Akita University, Akita, Japan The presence of enargite is problematic in gold processing because it is environmentally hazardous due to its arsenic content but also because it is double refractory causing cyanide and oxygen consumption to both increase. Selective leaching and treatment of the arsenic would prove advantageous prior to applying conventional gold leaching methods. The reactivity of enargite samples Were spectroelectrochemically studied under alkaline conditions, pH range of 8-13, using Raman spectroscopy and cyclic voltammetry and compared to EH-pH diagrams determined from mass-balanced thermodynamic calculations using StabCal software. Under slightly oxidizing conditions, covellite (CuS) peaks were found in a short matter of time, above ~100mV vs SHE for pH 9-13, suggesting arsenic leaching specifically occurred. At longer conditioning times, elemental sulfur was observed and tended to passivate the surface. The presence of sulfur suggests that copper was eventually leached. By operating above pH 12, under slightly reducing conditions near -300mV vs SHE, arsenic can be selectively leached as thioarsenate or thiosulfate without sulfur formation. 9:45 AM Walter Creek Heap Leach at Fort Knox Gold Mine, Alaska H. Propsom and J. Oleson; Kinross, Fairbanks, AK The Kinross Fort Knox Gold mine, near Fairbanks, Alaska, has implemented an operational change to process low gold grade ore with the addition of a valley fill heap leach. In 2009 a valley fill heap leach pad was constructed and commissioned to process low Au grade run-of-mine (ROM) ore. The heap leach pad, originally designed to stack 160 million tons of ore, has been re-designed to hold approximately 320 million tons to be placed over a 12 year period. Run-of-mine ore is planned to be placed at a rate of approximately 115,000 tons per day from mid-March through mid-November (for a total of about 31.0 million tons per This is the Technical Program as of September 1, 2012. IT IS SUBJECT TO CHANGE. 102 Please see the Onsite Program for final details.
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