Mining copper tailings could answer supply …
Capstone says that by processing millions of tons of waste rock, it hopes to produce an additional 350 million lb. of copper, thought to be worth more than $1.6 billion at current prices, in the ...
Strength and durability characteristics of copper tailing concrete
Copper tailings has maximum amount of silica (75%). In comparison with the chemical composition of natural pozzolonas of ASTM C618-99, the summation of three oxides (silica, alumina and iron oxide) in copper tailings is 90.76%, which exceeds the 70% requirement for class N raw and calcined natural pozzolanas. Therefore, copper …
(PDF) Prospective environmental assessment of …
Results indicate that reprocessing may save from 25 up to 930 kg CO2-eq per tonne of treated copper tailings. Potential environmental benefits depend on the …
Geosciences | Free Full-Text | Recycling and Reuse of Mine Tailings…
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 …
MANAGEMENT OF TAILINGS: PAST, PRESENT AND …
copper production, particularly in Chile, increased significantly. The failure resulted in almost immediate industry-initiated changes to tailings facility construction in Chile. These included: • using dozers to flatten the downstream slope to about half (from an angle of repose of wet sand of about 2.5 horizontal to 1 vertical to about 4 to 1),
How to generate value from tailings with reprocessing to be …
With advent of novel technologies, mining companies are now figuring out ways to extract valuable metals from tailings. In gold, copper sulfide and iron ore tailings, the potential of extracting minerals is an opportunity. Reprocessing tailings to collect the valuable minerals can be a cost-effective approach compared to processing …
(PDF) The Challenges and Prospects of Recovering Fine Copper …
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are ...
The Challenges and Prospects of Recovering Fine …
Abstract. Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in …
2. Processing of Sulphide Ores and Mine Tailings: …
1.1. What Are Mine Tailings? An Initial Scope in an Uncertainty and Complex World. The initial step in mineral processing involves crushing and grinding ore to produce a suitable particle size for further metallurgical processing using physical and chemical separation methods [].Physical separation processes take advantage of the …
Prospective environmental assessment of reprocessing and …
The environmental impacts of reprocessing copper mine tailings were studied. • Process modeling and technology upscaling were performed for inventory analysis. • Tailings reprocessing resulted in climate-positive impacts from a life cycle perspective. • Mineral recovery is essential to ensure significant benefits from …
Towards mine tailings valorization: Recovery of critical …
They are a mixture of ground rocks and process effluents generated during processing of the ores, and their composition depends on the nature of the mined rock and the recovery process used. In copper mining, tailings can account for 95–99% of crushed and ground ores (Edraki et al., 2014).
New approaches for extracting and recovering metals from mine tailings
Copper and silver were extracted both from mineral residues and fresh mineral tailings by mixing 0.5 g of representative samples with 10 mL of a solution containing 3.42 M NaCl and 0.2 M HCl ( Romero et al., 2003 ), and heating for 1 h at 90 °C. 2.4. Sulfidogenic bioreactors and selective recovery of copper from PLS.
(PDF) Dewatering of Copper Flotation Tailings: Effect of …
Dewatering of Copper Flotation Tailings: Effect of Feed Dilution on the Thickener Performance July 2018 Mineral Processing and Extractive Metallurgy Review 40(1):1-7
An extensive review on restoration technologies for mining tailings
Copper tailings have a high concentration of copper while other contents are within the normal concentration ranges in soil. However, concentrations of heavy metals in iron ore tailings, red mud, and manganese tailings are within the normal concentration ranges in soil. ... Mature fine tailings from oil sands processing harbour diverse ...
Selective Process Route to Recover Magnetite 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 2.4 bil-lion tonnes, and the annual production has been increasing year by year [11]. Due to the wide variability of physical and chemical prop-
Mine tailings: reprocess, recover & recycle
Say a copper mine produced 1Mt of metal in 1999 at 90% recovery. The remaining 10% of copper, around 111kt, went to tailings. If the average copper price in 1999 was US$1,500/tonne then that 10% represented US$166.5 million of metal. Fast forward 20 years and at today's price, US$5,842/tonne, if that material could be …
Environmental Risks From Mine Tailings
Tailings from copper and uranium mining often produce measurable levels of radioactivity. Tailing Ponds Some mining wastes become very fine after they have been ground up during processing.
Recent practices in mine tailings' recycling and reuse
Copper-rich tailings can be turned into lightweight ceramics by sintering iron tailings mixed with fly ash and sewage sludge in paint making. Tailings can be used as additives for soil in road construction in the construction industry. ... After this process, the tailings are brought into a homogeneous state and mixed with water and activator ...
Underestimated environmental benefits of tailings resource …
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.
The Reprocessing and Revalorization of Critical …
Article. The Reprocessing and Revalorization of Critical Minerals in Mine Tailings. Review. Published: 01 January 2022. Volume 39, pages 49–54, ( 2022 ) Cite …
Low Energy Process Development for Chibuluma Copper Tailings
Conclusions. 1. The as-received tailings material contains 1.19 and 0.97 wt% total and acid-soluble copper, respectively. Therefore, about 82% of the material is acid-soluble. 2. The as-received tailings material is generally coarse as only 9.17 wt% has a particle size of less than 0.075 mm. 3.
Experimental Study of the Sulphatizing Roasting of Flotation Tailings …
Grudinsky et al. (2021) and Wan et al. (2021) studied sulfation roasting, followed by extraction with water, of respectively tailings of copper slag processing and copper slags and found technical ...
What are Tailings
Tailings are a by-product of mining. After ore containing an economically-recoverable commodity is mined from the earth, that commodity is extracted in a processing plant or mill. After the commodity of value is extracted from the ore material, the resultant waste stream is termed "tailings". Typically, mill tailings range from sand to silt ...
Tailings.info What Are Tailings?
Introduction. Tailings consist of ground rock and process effluents that are generated in a mine processing plant. Mechanical and chemical processes are used to extract the desired product from the run of the mine ore and …
Tailings | SpringerLink
Most of the tailings mass produced worldwide is pumped into tailings storage facilities, including large surface impoundments so-called tailings dams (Fig. 4.2).The impoundments are best thought of as purpose-built sedimentation lagoons where fine-grained waste residues and spent process water are captured.
(PDF) Copper Upgrading and Recovery Process from Mine …
To 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 ...
Regionalized Life Cycle Inventories of Global Sulfidic Copper Tailings
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 …
Regionalized Life Cycle Inventories of Global Sulfidic …
This research combines state-of-the-art environmental and mineral processing frameworks, indicating highly variable impacts caused by sulfidic copper tailings deposited worldwide. Regionalized Life Cycle …
Mine tailings-based geopolymers: A comprehensive review
The specific surface area of mine tailings, which ranges between 0.5 and 7.3 m 2 /g and is impacted by the distribution and particle shape, is measured [ 142 ]. The bulk density of mine tailings in the bulk state ranges from 1.81 to 1.93 t/m 3, with 1.81 t/m 3 being the average value.
From Tailings to Treasure? A New Mother Lode
New technology allows it to recover up to 40% of the gold left in particle form in tailings. 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.
Socio-Environmental Risks Linked with Mine Tailings …
There is a need to define mine tailings in a clear, precise, multidisciplinary, transdisciplinary, and holistic manner, considering not only geotechnical and hydraulic concepts but also integrating environmental and geochemical aspects with implications for the sustainability of mining. This article corresponds to an independent study that …
Coal slime as a good modifier for the restoration of copper tailings
Copper tailings refer to the solid waste produced during the processing of copper ore, constituting a significant proportion of 95–99% of the original copper ore. These tailings are commonly kept in designated areas such as tailing dams or tailing ponds (Beylot and Villeneuve 2017 ).
TENORM: Copper Mining and Production Wastes | US EPA
Ores that contain copper in the U.S. are typically mined in large, open-pits. Copper processing facilities are usually located near mining or extraction sites. Significant waste volumes are associated with copper production. ... Some studies have shown that copper tailings can be used in bricks if pyrites are first removed. For more information ...
Potentially Exploitable Reprocessing Routes for …
Experiments conducted at the laboratory scale enabled identifying two exploitable routes for recovering metals retained in the tailings: firstly, the sulfuric acid …
Recovery of Iron from Copper Tailings Using a Combined
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 …
Improving Flocculation Performance of Copper Flotation Tailings …
Dewatering and water recycling are therefore essential for mineral processing operations. Copper is one of the most widely used metals in various industries. About 20 million tons of copper were produced worldwide in 2019 (Esmaeili & Aslani, 2019). Large amounts of tailings are produced when copper minerals are concentrated …
The Challenges and Prospects of Recovering Fine Copper …
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated as tailings. However, a significant amount of copper is lost into tailings during the processing; therefore, tailings can be considered …