• UNSW team selected to eliminate mining tailings problem ...

    Copper tailings are a common by-product of the mineral recovery process and BHP, with the support of Fundacion Chile and its open innovation program EXPANDE, are looking for sustainable economy solutions that can repurpose the tailings into a marketable product by using circular economy strategies.

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  • China: copper consumption by usage 2016 | Statista

     · Copper consumption by usage China 2016. Published by Samantha Wong, Dec 23, 2020. The statistic shows the copper consumption by usage in China in 2016. In that year, power accounted for 50 ...

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  • From Tailings to Treasure? Miners Make Money Reprocessing ...

     · DRD Gold extracted 33,600 ounces of gold, worth nearly US$40 million, in the last quarter of 2013. Mintails, a mine tailings processor, has developed new technology to process 350,000 tons of slimes from its extensive tailings resources. It expects to recover 58 kg of gold per month, and has enough slimes to last until 2025.

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  • Statistical analysis of tailings ponds in China ...

     · 5189 tailings ponds in China have been discussed in this paper. Especially, average altitude of tailings ponds is 699.4 m, the occupied land is 1884.0 km 2, and the strip between the tailings wastes and soil are accumulated to 14674.4 km.. The tailings ponds were widely distributed throughout the country, especially, highest horizontal distribution density occurs in north Hebei province, with ...

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  • Global Copper Industry Supply and Demand: Key Challenges ...

    Less recycled copper use in Chinese copper wire rod plants was expected in recent years after tighter quality controls on "Made in China" copper wire and cable products. The gross weight use of scrap in Chinese brass mills and some semis is higher, and might achieve over 2.2 Mt in gross weight but with low copper …

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  • Tailings

    Tailings, most often in the form of a wet slurry, are conventionally stored above-ground behind earthen dams. There is no comprehensive global registry of tailings dams. It is estimated there are around 18,000 dams, 3,500 of which are active. However, that number may be much higher. For example, China alone has more than 12,000 tailings dams.

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  • Leaching characteristics and mechanism of copper flotation ...

     · The copper deposit in Yangla zone of China is large, and its recovery is low only using flotation process. Therefore, the copper in the flotation tailings is leached by sulfuric acid can improve copper recovery. The factors affecting leaching process and the leaching mechanism were investigated in this study. Copper is leached at a rate of 53.8% when initial H2SO4 concentration is 0.428 mol/L ...

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  • In situ recovery, an alternative to conventional methods ...

    Copper is the most popular commodity (after uranium) that is mined by ISR (Table 1). There are references to primitive forms of in situ leaching of copper in Roman times, and maybe even long before that in China (O''Gorman et al., 2004). The San Manuel copper mine in Arizona is the best known copper mine exploited by ISR (O''Gorman et al., 2004).

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  • Copper

     · The United States is the fourth largest copper miner in the world. In 2019, U.S. mine production of copper came to an estimated 1.3 million metric tons. The largest copper mines in …

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  • Chapter 7 Energy Use in the Copper Industry

    milled, how much copper is recovered and what volume of tailings is produced (see table 7-3). The stripping ratio also affects where and in what form energy is consumed, because it de-6As disusscdIn ch 5, the cut-off grade IS the mineral valuethat must be present in the ore for it …

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  • Tailings dam failure heightens scrutiny of Chinese mines ...

     · A tailings dam failure at Tonglvshan copper mine in Huangshi in China''s Hubei province resulted in two deaths in March 2017. The local government launched immediate safety inspections of all tailings dams in Huangshi. More stringent environmental legislation and mine safety inspections have been introduced by the government in the past two ...

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  • Mining copper tailings could answer supply deficits later ...

     · There is an estimated total of 217,330,652,000 m 3 of tailings in storage globally, with copper accounting for about 46% of stored material globally. Copper production is the number one ...

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  • Utilization of tailings in cement and concrete: A review

     · Tailings are traditionally named according to their sources, the ore body, for example iron ore tailings, lead-zinc tailings, copper tailings, gold tailings, oil sands tailings, and so on. Researchers making materials often use this classification method, but it does have some limitations, for it cannot reflect the nature of the tailings and ...

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  • China to limit new tailings dams to reduce safety ...

     · China will limit the number of new tailings dams for mining projects and cut down on the use of existing ones to reduce safety risks and ease environmental pressures, the …

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  • China: copper consumption volume 2000-2022 | Statista

     · Copper consumption volume China 2000-2022. Published by Samantha Wong, Dec 23, 2020. This statistic shows the copper consumption volume in China …

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  • China tightens rules on tailings dam safety | Reuters

     · China has tightened rules covering the safety management of tailings dams, including banning them in some areas, authorities said on Thursday, as the country aims to …

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  • Chronology of major tailings dam failures

     · copper, gold, silver, iron. a partial dam failure occurred at the northwestern corner of the tailings pond, opening a crevasse (gap) of approx. 200 metres. approx. 200,000 m 3 of tailings. The tailings flooded the fish pond downstream of approx. 27 hectares. Two persons were reported dead and one was reported missing.

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  • Tailings

    Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore.Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed.. The extraction of minerals from ore can be done two ways: placer mining, which uses water ...

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  • Environmental-Friendly Process for Recovering Copper and ...

    Contamination of heavy metals from mill tailings is a global problem. China''s Jinchuan Group Limited has stored approximately one billion tons of mill tailings which contain toxic levels of copper, nickel, and other metal compounds. To solve the problem, this work extended the principle of hydrometallurgical extraction to the recovery of copper/nickel from Jinchuan tailings and designed an ...

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  • Tailings solutions: How to filter down the options

    Potential water recovery potentials for copper flotation tailings are shown in the below table. In Chile, current estimates for the cost of desalinated water pumped to the mine are as high as $5 per cubic meter or higher. Table 2: Potential Water Recovery for Dewatering Copper Flotation Tailings [1]

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  • Mine tailings dam failures major cause of environmental ...

     · The Imperial Metals Mount Polley gold and copper mine tailings dam disaster in British Columbia, Canada, dumped 24 million cubic meters (more …

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  • Visualizing the size of mine tailings

     · Visualizing the size of mine tailings. On January 25th, 2019, a 10-meter tall wave traveling 120 km/h, washed 10 million m 3 of mining waste from the Brumadinho tailings …

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  • USGS Mineral Resources Program The Rare-Earth Elements ...

    (2) China''s dominance in production and supply of the REEs and (3) inter-national dependence on China for the majority of the world''s REE supply. Since the late 1990s, China has provided 85 – 95 percent of the world''s REEs. In 2010, China announced their intention to reduce REE exports. During . this timeframe, REE use increased ...

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  • The Importance of Copper In China''s Economy ...

     · More efficient technologies tend to use larger amounts of copper, and, as a result, Made in China 2025 is expected to boost copper usage in the …

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  • Speciation, Fate and Transport, and Ecological Risks of Cu ...

    Tailings collected from the tailing reservoir at Huogeqi Copper Mine, located in Inner Mongolia, China, were used in a leachate study to evaluate the acid potential, neutralization potential, and possibility for producing acid mine drainage (AMD) from the site. The speciation of Cu, Pb, and Zn contained in the tailings was also determined during the leachate study to further access the ...

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  • All of the World''s Mine Tailings, in One Visualization

     · Visualizing the Size of Mine Tailings On January 25th, 2019, a 10-meter tall wave traveling 120 km/h, washed 10 million m 3 of mining waste from the Brumadinho tailings dam over the Brazilian countryside killing somewhere between 270 and 320 people.. This was a manmade disaster, made from mining the materials we use daily. Every copper wire in your house, steel frame in an EV, …

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  • Environmental impact of mining

    Environmental impacts of mining can occur at local, regional, and global scales through direct and indirect mining practices. Impacts can result in erosion, sinkholes, loss of biodiversity, or the contamination of soil, groundwater, and surface water by the chemicals emitted from mining processes. These processes also have an impact on the atmosphere from the emissions of carbon which have ...

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  • The dystopian lake filled by the world''s tech lust

     · Neodymium is no rarer than copper or nickel and quite evenly distributed throughout the world''s crust. While China produces 90% of the global market''s neodymium, only 30% of the world''s ...

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  • Visualizing China''s Dominance in Rare Earth Metals

     · Visualizing the Size of Mine Tailings On January 25th, 2019, a 10-meter tall wave traveling 120 km/h, washed 10 million m 3 of mining waste from the Brumadinho tailings dam over the Brazilian countryside killing somewhere between 270 and 320 people.. This was a manmade disaster, made from mining the materials we use daily. Every copper wire in your house, steel frame in an EV, …

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  • The world''s top 10 highest-grade copper mines

     · The concentrate contains approximately 29% copper and is exported to smelters in India, China and Southeast Asia. With 4.3% copper grade in reserves, this mine holds fourth place in our list of ...

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  • The Importance of Copper In China''s Economy | Paid for and ...

     · More efficient technologies tend to use larger amounts of copper, and, as a result, Made in China 2025 is expected to boost copper usage in the country by an …

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  • Environmental Impact Assessment of Mining Activities on ...

     · Seepage from a tailings dam associated with a copper mine located in Ganzhou, Jiangxi Province, China, may affect surrounding groundwater quality during mine operations. A groundwater environmental impact assessment (EIA) is an important aspect of China''s current EIA system, and is used to protect groundwater quality.

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  • Copper-Mine Tailings in a Geopolymer System

    fibers Article Enhancement Experiment on Cementitious Activity of Copper-Mine Tailings in a Geopolymer System Lin Yu 1,2,†, Zhen Zhang 1,†, Xiao Huang 1,†, Binquan Jiao 1,2,* and Dongwei Li 1,* 1 State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; [email protected] (L.Y.); [email protected] (Z.Z.);

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  • Characterizations of heavy metal contamination, microbial ...

    Copper mine tailings are causing great environmental concern nowadays due to their high contents of heavy metals. These hazards may release to air, water, and soil, posing great threat to the living organisms in the surroundings. In the present work, we profiled the heavy metal contents, microbiome …

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  • Design, construction and management of tailings storage ...

     · Consequently, data up to 2008 shows that more than 12 000 tailings storage facilities have been built in China. This paper reviews the history of tailings disposal in China, discusses three cases of tailings dam failures and explores failure mechanisms, and the procedures commonly used in China for planning, design, construction and management ...

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  • Long term effects of Lespedeza bicolor revegetation on ...

     · The Dexing copper mine is located in eastern Jiangxi Province, Southeast China (latitude /longitude: 29° 00′ N /117° 43′ E). The region has a typically warm and humid subtropical monsoon climate, with an annual precipitation around 1 869 mm and an annual mean temperature of 17.8 °C.

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  • Old Mine Tailings: New Mother Lode For Rare ...

     · China, however, has jacked up prices dramatically in the past two years. As reported by the AP, China raised the price of Neodymium, used to make Prius electric motors, from $15 a …

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  • Major tailings dam burst reported in China

     · Major tailings dam burst reported in China. China has nearly 8,000 tailings dams, the most in the world. (Image: AZ China.) According to the AZ China blog a major tailings …

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  • Economic Potential for reprocessing Copper Mine Tailings ...

    The copper grade of the tailings varied between 0.1 % and 1.7 %. Further elements of interest were iron, gold, molybdenum and zinc. This data and the tonnage of the tailings ponds was the basis to select four sites for a more detailed analyzes (Minera Carola, Minera Clarita, El Salado and Taltal). Around 20 – 25 kg of material were

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  • Mining Chemicals

     · Mining chemicals represent a niche area of supply but at the same time their use is almost universal across the industry. In this month''s im-mining Spotlight Feature Article, from the June issue of International Mining magazine, Editor Paul Moore looks at the players, challenges, and future horizons for the sector.

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  • An end to tailings dams

    A large copper concentrator with a tailings output of 100,000 tonnes per day, for example, could save 200 million m3 of water over ten years by using our dry stacked tailings technology combining thickener and filter with our RAHCO® mobile stacking and conveying system to dispose of the tailings as dry filter cake," states Todd Wisdom.

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