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·Renewable ammonium chloride induced calcium leaching of gold and copper tailings and selective preparation of vaterite CaCO 3 by CO 2 mineralization Author links open overlay panel Hengshuang Wang a Zijing Lu a b Show more This study introduced a high value green processing solution for copper tailings to prepare high purity vaterite
·Copper industrial minerals include natural copper chalcopyrite chalcocite tetrahedrite azurite malachite etc Chalcopyrite a compound of copper sulfur and iron is mined mainly followed by chalcocite and bornite If copper ore wants to be fully utilized it must be processed by flotation Flotation separation is an important copper ore beneficiation process in
·The copper concentrate obtained from the flotation of tailings [30] was used as feed sample in this achieve an excellent copper dissolution from the concentrate of flotation tailings which consist of chalcopyrite as the major copper component high‒pressure leaching HPL was conducted using an autoclave under a variety of sulfuric acid
Therefore the consolidation process of the fine iron tailings during and after the construction of the tailings dam can be analyzed with the traditional Terzaghi s theory whereas for the fine copper tailings the acceleration of the consolidation process caused by the increase in C v
·The scope of this study is the entire process of copper tailings resource utilization All data are actual production data from certain copper tailings resource utilization enterprises in Tongling City in 2021 The tailings utilization volume of 1 ton was selected as a functional unit and all data were converted based on this unit
·Against the backdrop of the increasing copper demand in a low carbon economy this work statistically forecasted the distribution of China s copper tailings for the first time and then characterized them as finely crushed and low grade mining solid wastes containing copper mainly in the form of chalcopyrite bornite covelline enargite and chalcocite based on
·Abstract in English Copper is widely used in the modern world An excellent conductor of electricity it is used in the electrical industry in the construction industry because of its good corrosion resistance and in the manufacture of heat exchangers in heating and cooling systems owing to its excellent thermal conductivity Copper production has increased
There are few researches on mineral processing supported by the mineralogy of tailings For instance Santander et al [10] used the flotation method to recover pyrite from copper tailings and studied process parameters such as pulping time pH dosage of flotation collector foaming agent etc to determine the best recovery process Finally
The cyanidation of copper flotation tailings containing sulfides for gold recovery is an example of the formation of cyanide complexes with copper and silver during the leaching process [11 12] Figure 4 shows the MLA Automated Minerology image of an ore sample from a copper mine in Mexico containing chalcopyrite and bornite as copper sulfide
·Application of an acid leaching process to tailings has generated excellent results Agrawal and Sahu 2010 Carranza et al Considering the price of copper in the world and the environment protection policy of China a possible recovery of copper from tailings by flotation can be obtained Download Download high res image 321KB
·Acid and ammonia leachingLeaching was carried out on old froth flotation copper tailingsCopper tailings from the Copperbelt Province in ZambiaZambia Chemical leaching using ammonia medium provides improved selectivity towards copper and prevents the corrosion of processing equipment The goal of this present work was to demonstrate the
·The profitability analysis of mine tailings processing requires the identification of geochemical characteristics of the tailings deposit also named tailings storage facility TSF Therefore these copper mine tailings could have substantial economic potential as secondary sources to obtain CRMs It is well known that some CRMs are more
·Dry magnetic separation was subjected to copper flotation tailings to separate ferromagnetic metals Fe and Ni from diamagnetic Al particles and the process achieved a recovery of around 99%
Since every ton of copper produced requires mining and processing roughly 250 tons of rock the past century of major mining has generated an estimated B tons of tailings nearly 10 cubic km of finely ground copper depleted waste rock with upwards of 200 M tons now added annually and more to come as more copper is mined
·Process mineralogy was applied to design the process circuit of magnetite tailings containing copper lead and zinc from Marcona Iron Ore Mine Mineralogy parameters such as mineral composition occurrence and grain size distribution of the main minerals were investigated in detail
·The results show that a plant to be installed in Chile to process copper tailings for the recovery of vanadium pentoxide using hydrometallurgical processes would generate the processing cost of 6 218 US$/t of V 2 O 5 It is assumed that this plant would have annual production of 4 400 t using average ore grade of % and a recovery rate of 62%
·At the heart of most of the copper tailings thickening processes is particle flocculation Aqueous solutions of flocculants long chains of water soluble polymers are added to bridge the fine particles into large fast settling aggregates with the aim of producing a clear liquor overflow and also a concentrated slurry underflow ; the latter is typically pumped out from
·copper tailings during the copper mineral separation process [2 5 7] According to the statistics up to 2007 the total discharge of copper tailings nationwide was about bil lion tonnes and the annual production has been increasing year by year [11] Due to the wide variability of physical and chemical prop
Copper tailings are the fine grained remains of copper ore produced through a series of processing techniques and belong to the by products produced during the mining process of mineral resources [1] It is characterized by a high SiO 2 content and a mineral composition dominated by quartz and silica aluminates [2] As of 2022 the production of tailings in China
·For example the Potrerillos Copper Mine disposed of mine tailings near its processing plant when it began operations 1920 1938 However the copper tailings were subsequently disposed of in coastal areas using a technique called offshore tailings disposal disposal of riverine and marine tailings
·Approximately 3 kg of copper and kg of zinc are recovered avoiding primary copper and zinc ore processing and subsequent tailings disposal With either scheme route B heavy metal emissions from tailings that often cause
·Worldwide an issue of copper production is the generation of mine waste with varying characteristics This waste can pollute natural environments and in particular the heavy metal emissions of the tailings may pose long term consequences Currently life cycle assessments of mine tailings are hampered by both limited data availability in the metal
·However a significant amount of copper is lost into tailings during the processing; therefore tailings can be considered secondary resources or future deposits of copper
