The objectives and benefits of the HPGR "Split-Use" are: Increase of overall copper recovery by 5 to 20%. Capability of treating low-grade and/or semi- refractory copper ores. Capability of energy-efficient throughput increases. Eliminating the need for agglomeration and problems of poor-quality agglomerates. Reduction of leach cycles.
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Mining and processing of complex copper sulphide ores, that are low grade, highly disseminated and contain troublesome gangue minerals such as clays, is becoming more common. Clays are fine to ultra-fine phyllosilicate particles which have a deleterious impact on the flotation of copper sulphide ores. The
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gravity recovery as well as improved and faster heap leach gold and copper recoveries. Test results suggest that mineral recovery benefits can be enhanced if HPGR-liberated sulfide particles are recovered early, i.e. by flash flotation before the HPGR product is ground in a subsequent ball mill.
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In the present research, copper ores (copper oxide ore and copper sulfide ore) were crushed by a jaw crusher and by HPGR and the products were evaluated for particle damage and copper grain ...
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In the present research, copper ores (copper oxide ore and copper sulfide ore) were crushed by a jaw crusher and by HPGR and the products were evaluated for particle damage and copper grain exposure by X-ray computed tomography. Column leaching was done to determine the rate and extent of copper recovery. X-ray computed tomography …
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The Copper Mountain mill flowsheet is currently a conventional two-stage crushing, SAG, pebble crusher, ball milling, and sulphide flotation circuit design. The current capacity supports 40,000 t …
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The annual sulphide processing design capacity was doubled to 50 million tonnes following the commissioning of the second sulphide concentrator in October 2021, which ramped up during 2022. Aktogay has a remaining mine life of around 25 years (including the expansion project) at an average copper grade of 0.27% (oxide) and 0.34% (sulphide).
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Kodali et al. (2011) used XMT to test the particle damage and copper grain exposure of products (copper oxide ore and copper sulfide ore) from HPGR and jaw crusher. Column leaching tests were used to determine the rate and extent of copper recovery. The results revealed that the HPGR products of copper oxide ore had more …
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As reported by [58], the use of hPGR technology in copper leaching using columns provides a greater release of sulphides at the grain boundaries, greater …
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The Cerro Colorado porphyry copper deposit is the northernmost currently active copper mine in Chile. It belongs to one of the Paleocene to early Eocene porphyry copper deposits that are distributed along the western slope of the main Andean Cordillera in Northern Chile. Cerro Colorado is enriched and oxidised porphyry copper deposit containing ...
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HPGR is beneficial in the recovery of minerals, as well as in leaching and cyaniding operations. Copper extraction from sulfide ores was 2% to 8% higher when leaching from HPGR-based circuit products, and kinetic readings of the process were more favorable . Comparable effects are evident when heap leaching other minerals from …
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FCX's South America mining operations include open-pit mining, sulfide ore concentrating, leaching and solution extraction/electrowinning. Production from these mines is sold as concentrate or cathode under long-term contracts. Our South America mines also ship a portion of their copper concentrate to Atlantic Copper, our wholly owned smelting and …
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Two copper sulfide ore samples (3 × 1 cm) from Arizona were analyzed by micro X-ray computed tomography (Micro-XCT) to determine the grade of copper sulfide in each particle. For copper ore ...
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— Optical microscopic modal analysis for copper sulfide liberation/accessibility in HPGR and conventionally ground ores. HPGR Comminution for Optimization of Copper Leaching W. Baum Kevin...
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Typical HPGR throughput rates range from 20 to 3,000 tph, with installed motor power as high as 3,000 kW per roll. The roll surface is protected with wear-resistant materials, and it has been these that have …
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High-pressure grinding rolls (HPGR) technology is a valuable way to improve the extraction efficiency of valuable minerals; however, the excessively fine particles of …
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In the present research, copper ores (copper oxide ore and copper sulfide ore) were crushed by a jaw crusher and by HPGR and the products were evaluated for particle damage and copper grain exposure by X-ray computed tomography. Column leaching was done to determine the rate and extent of copper recovery.
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to the copper sulfide minerals. For most ores, conventional crushing does not ... fective impact of HPGR for copper leaching (Phelps Dodge, 2001, 2003; Freeport-McMoRan, 2008).
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As expected, copper recoveries improved with a decrease in the particle size of the copper sulfide ore as exposure of copper mineral grains increased. View Show abstract
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These leftovers lead to numerous impurities — especially copper sulfide (Cu 2 S), which the South Korean team reported finding in its sample. Jain, a copper …
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The ndida copper-gold-silver mine is located in Chile's Atacama Desert, 160km south-east of the port of Antofagasta, at an elevation of 3,050m above sea level. ... Primary hydrothermal sulphide ore grades at between 0.2% and 1% copper. Subsequent weathering and uplifting created a barren, leached cap, up to 180m thick, over a high …
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The liberation of copper minerals is important in ensuring high flotation efficiency in copper sulfide flotation. The high pressure grinding roll (HPGR), microwave (MW), and electric disintegration (ED) feature enhanced liberation over conventional comminution machines such as jaw crushers and ball mills by producing internal stresses on ...
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Copper ores (copper oxide ore and copper sulfide ore) were crushed by a jaw crusher and by HPGR. Crushed and sized products were evaluated for particle …
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The 3Mtpa processing plant is equipped with circuits for recovering the native copper metal and conventional flotation circuits to treat supergene and primary sulphide zones. The plant for the native copper circuit has high-pressure grinding rolls (HPGR), a German crushing technology that allows clean separation of the gangue material from the ...
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All copper sulfides require the presence of Fe 3+ and O 2 as oxidizing agents for leaching to occur. The copper sulfide is oxidized by Fe 3+.The resulting Fe 2+ is reoxidized to Fe 3+ by O 2.The Fe(II)/Fe(III) redox couple acts in a catalytic manner in these reactions (shown for elevated-temperature reaction conditions where the sulfur-containing product is …
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Flotation reagents used in the processing of copper sulfide and oxide ores and their costs are presented. The combined circuit of flotation-hydrometallurgical processing of mixed copper ore at the Udokan deposit is considered. ... The HRC3000, the world's largest roller press (or HPGR)—with a capacity of 4928 t/h—used for fine …
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HPGR AG/SAG mill. Ball mill. Vertimill™ ... Excessive addition of copper sulfide may result in lower recovery due to oxidation of xanthate into dixanthogen in solution, thus reducing the effectiveness of collection. Copper sulfate addition also appears to impact froth stability. There is an optimum dosage below which results in high slime ...
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Copper content of the pregnant liquor at Ranchers Exploration and Development Corp. varies from 3 to 7 grams per liter. In-place Leaching. Inplace leaching techniques are applicable to leaching oxide and sulfide ores of copper and other metals. The basic principles involved are similar to those for dump or heap leaching.
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Chilean copper miner Antofagasta Plc (LON:ANTO) will make a decision about going ahead with a $3B expansion of its Centinela mine, located in the country's north, by the end of next year or in 2021.
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Same comminution circuit as Boddington, including HPGR producing P 80 2 ... Copper recovered as sulfide by Sceresini process: 43: Telfer: Western Australia: Soluble copper: Selective mining; cyanidation, SART: Campaign process a bulk Cu-Au concentrate, a sequential Cu-Au and Au-pyrite concentrate, or pyrite-only concentrate. SART installed
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Chapman et al. (2013) compared the effects of using different circuits HPGR (dry) -rod mill (wet) and cone crusher (dry) -rod mill (wet) on the flotation of base metal …
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Optimise your results with our HPGR high pressure grinding roll, an ultra energy efficient way to crush fine particles ... (HPGR) improves productivity for South American copper miner. Read Story. The new F-Series HPGR is a successful prospect for Ivrindi Gold. Read Story. Hydraulic roller presses boost productivity at Orient Cement. Read Story ...
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High-pressure HPGR produced a slightly finer particle size distribution when compared to other crushing methods for both copper oxide and copper sulfide samples (Fig. 2, Fig. 3). Based on the P 80 values, it appears that the copper sulfide ore is softer than the copper oxide ore. Mineral exposure
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Copper extraction from sulfide ores was 2 to 8% higher when leaching from HPGR-based circuit products, and kinetic readings of the process were more favorable [13]. Comparable effects are evident ...
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The Morenci copper mine is located in Greenlee County, Arizona, in the southwestern part of the US. It is among the largest copper producers in North America. US-based mining company Freeport-McMoRan operates the Morenci project. The company owns a 72% interest while the remaining 28% is held by Sumitomo Metal Mining's …
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2.2. Crushing. A primary jaw crusher (PE-150 × 250A) was firstly employed to comminute the Zijinshan copper ore. The comminuted copper ore passed through a 20 mm sieve, was evenly mixed and divided for further crushing by a jaw crusher (PEF-60 × 100), a roller crusher (XPZ-200 × 75), and a high-pressure grinding roll (HPGR, GM35–16), …
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