Approximately 13.7 million tons of copper mine tailing as a solid waste is generated annually as a result of mining and ore processing activities in the region. This study investigates the …
This study investigates copper ore tailings deposited in Repparfjorden, Norway in the 1970's. Bathymetric show that the tailings deposit still occurs as a series of cone-shapes and has retained its original shape for four decades. Analytical data of 51 chemical elements show that some of the tailings are spreading, affecting fjord surface ...
The tailings treatment includes three key aspects: (i) settling efficiency for flocculation and sedimentation; (ii) sediment moisture content for concentration and storage in …
mature tailings of copper-nickel ore concentration circuits show that during the storage of fine-grained waste, irreversible changes occur that are associated with oxidation and natural
There are an estimated 282 billion tons (bt) of abandoned tailings waste facilities and 16bt of active facilities globally, representing a potentially huge resource of critical minerals including copper, cobalt and rare earths.
2.1 Study area description and sample collection. The copper-nickel mine tailings pond was built in 1999 and is located in northern Xinjiang Province and in the eastern part of Fuyun County ().The design level of the pond capacity is grade Ⅴ and the floor area is about 1.5 × 10 5 m 2.The slag waste is disposed of by the traditional wet discharge method and the …
To account for copper grade declines, it is assumed that the degradation of copper ore grades follows the power regression relationship according to Crowson (2012). Copper tailings are produced from different mines, and thus it is important to fully characterize the quality and quantity of copper tailings at each site.
Iso-floatability flotation process was further applied to the magnetic tailings, achieving a copper grade of 28.37 wt.% and a recovery ... and 25.21%, respectively. Therefore, this study provides an available separation of copper-zinc-lead minerals from iron tailings at Marcona Iron Ore Mine based on process mineralogy, thereby giving a prior ...
Typical sulphide copper ore flowsheet process of copper mine tailings management. ... The form must contain information on the proposed amounts of the chemical to be used along with details of its chemical and physical properties and its fate, including how the chemical will be managed and handled after use and its concentrations and amounts in ...
is estimated to be 20 million metric tonnes. It has been reported that for every tonne of copper ore mined, 0.96 t of copper mine tailings (CMT) are produced. Tailings dams are constructed for the storage of tailings in slurry form. It is estimated that there are about 3500 active tailings impoundments worldwide.
As the world's largest producer of refined copper, China accounts for about 1/3 of the world's production. At present, China's refined copper is mainly produced by pyrometallurgy [1,2,3].The annual discharge of copper slag exceeds 10 million tons according to the calculation of 2.2 tons of copper slag per ton of refined copper produced in the copper smelting process …
The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammonia/ammonium chloride solutions has been studied. The tailings belong to a low-grade and high-alkaline copper ore. The effect of leaching time, the concentration of ammonia, solid/liquid ratio and temperature were investigated. The main important parameters in …
Velten et al. (2022) carried out an analysis of copper ore tailings in different locations of a same dam, focusing on triaxial tests to characterize dense samples, varying the compaction rate.
This study investigates copper ore tailings deposited in Repparfjorden, Norway in the 1970's. Bathymetric show that the tailings deposit still occurs as a series of cone …
Earlier mining operations produced significant amount of low-grade waste tailings during the extraction processes of the valuable ore. In Zambia, there are reportedly more than 45 old tailing dams covering an area of about 9125 ha [], of which with the opening of more new mines, may see more being generated.These tailings present a significant metal resource.
published by the chair of the Global Tailings Review, copper accounts for 46% of the world's tailings (2016). The same paper maintains that to obtain 20.1mio tons of copper, 14'913mio tons of rock are extracted from the ground. With declining ore grades in many active copper projects, as well as the projected increase in copper demand,
The possibility of selective Cu and Zn leaching from the sample of old pyrite tailings, which is one of the most widespread types of solid waste forming during non-ferrous metal production, using sulfuric acid solutions and water was studied. It was shown that water leaching provided selective extraction of Cu and Zn and comparatively low iron ion extraction. …
Details of our tailings facilities can be found on our interactive tailings disclosure map. ... This unique technology achieves recovery rates of up to 85% from primary sulphide ore, the most abundant type of copper ore in the world – substantially higher than recoveries achieved by alternative leaching technologies.
Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air environments. It reached 7 billion tonnes of mine tailings generated yearly worldwide, and 19 billion solid tailings will be accumulated by 2025. Adding to this, the …
The analysis 16 reveals that together, copper tailings from the large (i.e., porphyry) and medium-size copper 17 deposits (i.e., volcanogenic massive sulfide and sediment-hosted) contribute …
Mine tailings are the waste material that remains after the economic fraction has been extracted from the mineral ore. Tailings consist of a slurry of ground rock, and water and chemical …
Arizona has produced ~70 M tons of copper since large-scale mining began in the late 19th century and contains at least another 280 M tons yet to be mined. Current production is ~0.75 …
In recent decades, CO 2 emissions from concrete manufacturers have accounted for 5–8% of global total CO 2 emissions. Moreover, the amount of industrial waste created increases year after year. Iron ore tailings (IOT) and copper ore tailings (COT) have been a matter of concern for researchers in recent years as a type of building material.
This study investigates copper ore tailings deposited in Repparfjorden, Norway in the 1970's. Bathymetric show that the tailings deposit still occurs as a series of cone-shapes …
country are copper oretailings, iron ore tailings, manganese ore tailings, gold tailings, ore zinc ore tailings, lead ore tailings, metal extracts etc [1, 2, 5]. Copper ore tailing is the fine gray type sandy material and it has some acidic smell. It can damage the root of the plants by mixing heavy metal contaminants in the soil. Copper ore
The possibility of selective Cu and Zn leaching from the sample of old pyrite tailings, which is one of the most widespread types of solid waste forming during non-ferrous metal production, using sulfuric acid solutions and water was studied. ... The Development of Innovated Complex Process for Treatment of Old Flotation Tailings of Copper-Zinc ...
This study, carried out in tailings from two sediment-hosted stratiform copper deposits in the Lublin-Głogów Copper District in Poland (Kupferschiefer-type deposit) and Zhezkazgan (cupriferous sandstone-type deposit) in Kazakhstan, analysed the mineralogy of copper, zinc, and lead minerals as related to metal accumulation in sediments. Microscopic …
Magnetic glass-ceramics with good performance were fabricated successfully by direct sintering, using residues with a small amount of iron after sulfur release and iron recovery from copper ore tailings. Hedenbergite, wollastonite and sekaninaite were formed with traces of maghemite and quartz. Meanwhile, the color of the magnetic glass-ceramics was lighter than …
The CRRs of the iron and copper tailings in this study are similar to other kinds of tailings such as copper tailings and copper-zinc tailings. As mentioned above, the cyclic resistance of soil can also be studied with the CDSS test, and some of the reported data of CDSS tests are also illustrated in Fig. 7. The comparison between the CTX and ...
In order to confirm the effect of FeS2 on copper leaching efficiency and the possibility of applying the optimal conditions to another copper ore treatment, sample A (copper ore excludes FeS2) and sample B (copper ore consists of 0.5% FeS2) were used in the HPL experiments.
A laboratory scale study was conducted, aimed at finding an effective method for processing fine concentration tailings of copper-nickel ores.
To comprehensively reuse copper ore tailings (COT), the fabrication of glass-ceramics by the direct sintering method was investigated, where the residues after sulfur release and iron recovery ...
Modification of copper tailings by calcium hydroxide (CCT) Ca(OH) 2 suspensions with different concentrations were added into conical bottles containing CT respectively. The conical bottles were ...
Currently, approximately 1.4 billion tons per year of iron ore tailing wastes (IOT) are generated, mainly in Australia, Brazil, and China. This work describes the characterization and application ...
To comprehensively reuse copper ore tailings, the recovery of γ-Fe 2 O 3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed.
This demands knowledge of the compacted material's response. Thus, the present research assesses the mechanical response of compacted copper ore tailings extracted from two different sampling locations within the dam reservoir (i.e. …
The formation of layering during the sedimentation process of tailings makes it of great significance to investigate tailings and to analyze their susceptibility to flow liquefaction. In this study, homogeneous iron ore tailings (IOTs) specimens were reconstituted with pure coarser grains and pure finer grains sampled from a typical tailings storage facility. Additionally, an …