What to do about the tailings between our legs?
When seeking to control the risk of long-term tailings facility failure, there is little we can do about the probability of failure. In the goodness of time it will occur. All we can do today, is to seek to limit the consequences of failure, adverse performance, and unacceptable impact.
Best Practices for Tailings Dam Design
· Cyclone sand tailings consist of the coarse fraction of tailings materials. Figure 4: Centreline constructed dam (McLeod and Bjelkevik 2017) Centreline tailings dams require less material to build than downstream tailings dams, and are more stable than upstream dams in the event of an earthquake.
Canadian Natural Resources
Canadian Natural has invested almost $3.8 billion in tailings research, technologies and project construction. Our tailings management technologies are the result of extensive research that can be applied on a commercial scale. This work exemplifies our approach to R&D, taking lab concepts through the pilot stage and on to commercialization.
What Are Tailings Ponds? | Environmental Impact | Alberta …
In oil sands mining operations, tailings are a mixture of water, sand, clay and residual bitumen, and are the by-product of the extraction process used to separate the oil from sand and clay. Tailings and tailings ponds are not unique to the oil sands – they are …
Tailings & Water Management | McLanahan
Tailings & Water Management. The goal with any tailings management plan should be to reclaim as much water as possible for reuse and to get the solid fractions into a state that can be safely and easily stored and handled. McLanahan provides a wide range of tailings management solutions to help producers achieve these goals, as well as meet ...
microbiology of oil sands tailings: past, present, future …
The sand settles rapidly after deposition, typically forming surface or subsurface beaches of ''coarse tailings'' at the pond margins, and can be reused for various purposes on-site. In contrast, after deposition the remainder of the fresh FFT (comprising ∼ 8 wt% fines, ∼5% unextracted bitumen, <1% unrecovered diluent and ∼85% process water) form a colloidal suspension.
Sustainable use of mine waste and tailings with suitable admixture …
Tailings • Reprocessing to extract minerals and metals • Waste reduction through targeted extraction of valuable minerals during processing • Sand-rich tailings mixed with cement used as backfill in underground mines • Clay-rich tailings as an
Tailings – What are they and what is in the Mount Polley …
· Due to this, Mount Polley''s tailings do not generate "acid rock drainage". This is the process that happens when sulphide minerals, especially pyrite, are exposed to the atmosphere and react to form sulphuric acid, which then can leach metals out of tailings and lead to metal mobility and potential contamination.
Tailings Fact Sheet
Tailings can be dewatered or modified in other ways prior to deposition. The current methods include: 1. Thickened tailings (which involves a process of dewatering to form a low solids content slurry); 2. Paste (which includes dewatering until the tailings do not 3.
Petroteq Energy Announces That Testing of the Sand …
· The Company has recently completed an evaluation of the clean sand tailings that are a byproduct of the oil extraction process. It was determined that 60-70% of the sand …
13 Applications of Tailings and Waste Rocks | Fote Machinery
· While the tailing sand is rough on the surface, and it can improve the strength of concrete. However, the tailings are required a certain particle size during its application for fine aggregate. Tailings should be screened when their particle size does not meet the
Historic Mills and Mill Tailings as Potential Sources of …
sion. At least 11 tailings dams were breached by flood waters, carrying fluvial tailings 1 to 15 km down canyons and across alluvial fans. Most of the tailings sites are dry most of the year, but some are near streams. Tailings that are wet for part of the year do not
Tailings disposal system for tar sands plant
This invention has to do with the treatment of the tailings stream from a hot water extraction plant for recovering bitumen from tar sand. This stream comprises water and coarse and fine solids. The stream is fed into a mined-out cavity to settle the coarse solids.
Tailings ponds: What they''re made of
· The sand quickly sinks to the bottom, then a middle layer forms, known as mature fine tailings (MFT), which is comprised of about 70 per cent water and 30 per cent fine clay. The top three or so metres of the pond is water, which is re-used at the mine site or in in situ processes to minimize the amount of fresh water taken from the Athabasca River.
It''s time to talk about tailings dams
On 25 January, a tailings dam at the Córrego do Feijão mine in Brumadinho, in the Minas Gerais region of Brazil collapsed, spilling 12 million cubic metres of mud and sludge. At the time of writing, 166 people were confirmed dead, with a further 155 are missing. ...
Tailings Management | Canada''s Oil Sands Innovation …
Tailings are the sand, silt, clay and water found naturally in oil sands that remain following the mining and bitumen extraction process. Working with universities, government and research institutes, other companies and partners, the Tailings EPA is bringing together the shared experience, expertise and financial commitment of oil sands mining companies to find new technologies and solutions ...
Colorado School of Mines to develop mine tailings center …
"The center is going to be interested in not just the safe disposal of mine tailings but also what we can do with the tailings that represent new products. We have a group that''s planning a project to melt tailings and pull glass fiber that could be used in all sorts of applications," Nelson said.
Lecture 4: Mining waste
LECTURE 4: MINING WASTE. This lecture covers the different types of mining waste, how they are formed and how they are disposed of or used. Mining produces large amounts of waste. In Sweden, the mining industry accounts for over 80 percent of the country''s total waste production each year. While the amount of waste can be substantial, not all ...
Oil Sands Tailings: What Needs to be Done
· The tailings stream is, therefore, composed of a large amount of water and some bitumen that escapes the extraction process, while the solids are mainly sand. When deposited in a tailings pond ...
What Do You Need to Know about the Tailing''s …
· Tailings filling in the goaf back to top Tailings sand filling in the goaf is a method dealing with tailing sands, which can protect terrain, reducing the cost of tailings dam and so on. Now the main methods of tailings filling in the goaf are the two as follows: 1. Full tailings
Tailings Ponds 101 | Oil Sands Magazine
· TAILINGS PONDS 101 Tailings ponds (or tailings storage facilities) play a critical role in storing solids from mined oil sands and managing water flows. These ponds are massive earth structures, initially constructed from overburden hauled from the mine site
Are you living in an area with mine tailings? Arsenic and health
Do not put mine tailing sand in your child''s sand pit. Do not use mine tailings in landscaping works. Wash your hands before eating and sleeping. Wash young children''s hands frequently. Wash children''s toys frequently to remove soil and dust. Wash all fruit
Arsenic mine tailings and health
Mine tailings often look like fine clay or sand and commonly contain raised levels of arsenic. Many towns and cities in Victoria have been built in areas with a history of gold mining. Mine tailings that contain arsenic are spread over large areas of land, including land now used for housing.
· Tailings are the byproducts left over from mining and extracting resources, such as extracting bitumen from the oilsands or minerals such as copper or …
Tailings Directive 074 Explained | Oil Sands Magazine
· Tailings Directive 074 forces operators to capture fines, reduce tailings volumes and reclaim the landscape in no less than 5 years. Although the directive itself is quite straight-forward, meeting its targets has required oil sands mining operators to do what previously
Gold Extraction from Tailings and mine waste
Gold Extraction from Tailings. Star Trace has been providing a standard technique for extracting the mineral contents from the mining tailings. Star Trace will start the process by sample testing through the mineral content of the tailings. After the successful result, Star trace will supply the equipment and training process to extracting the ...
What are tailings dams? | IndustriALL
· Tailings dams are used to store water and waste that come as by products from the mining process. It is estimated there are at least 3,500 tailings dams around the world. But as there are around 30,000 industrial mines, the number of tailings dams is likely to be much higher. Tailings dams can be huge in size, as big as lakes, and reach 300 ...
Tailings Fact Sheet
Tailings can be dewatered or modified in other ways prior to deposition. The current methods include: · Thickened tailings (which involves a process of dewatering to form a low solids content slurry); · Paste (which includes dewatering until the tailings do not
Sanding down wood and metal: a guide to sanding | …
Or do you just want to sand down the sawn-off edges of a piece of wood to remove splinters? There are a wide range of different sanding methods and grits of sanding paper you can use to get the desired result. Depending on the size of your object, you can 2.1 ...
· Many mine tailings do not become appreciably safer over time, if stored properly, and therefore must stored for an indefinite period using current technology. The historically-used alternative to storage was to dispose of tailings in the most convenient way possible (such as river dumping), which led to widespread environmental contamination in mining areas.
What are Oil Sands Tailings?
· What are Oil Sands Tailings? - . What are tailings and why are people talking about them? Join Keith and Rita in "Conversations That Matter," a series of short videos about Alberta''s oil s...
Process and equipment for making sand with tailings | LZZG
Machine-made sand, instead of river sand, is used to prepare concrete and mortar, which can not only solve the problem of shortage of construction sand and environmental pollution of waste rock chips, but also improve the utilization rate of resources.
Tailings do not have to be stored in ponds or sent as slurries into oceans, rivers or streams. There is a growing use of the practice of dewatering tailings using vacuum or pressure filters so the tailings can …
Time to talk about tailings dams
· On 25 January, a tailings dam at the Córrego do Feijão mine in Brumadinho, in the Minas Gerais region of Brazil collapsed, spilling 12 million cubic metres of mud and sludge.At the time of writing, 215 people were confirmed dead, with a further 91 are missing. "The ...
13 Applications of Tailings and Waste Rocks | Fote Machinery
Tailings - Wikipedia
What are tailings in mining?
· Tailings are the waste products from mining. Depending on the type of mining, tailings can be liquid, solid or a slurry of fine particles. Tailings include: Finely ground rock particles – ranging from sand-sized to silt-sized. Chemicals used to ex...
What you need to know about tailings ponds
· The problem now is what will those tailings do. What''s in those tailings can be an issue, but as I understand it, there''s a lot of biological activity that had consumed most of the metals in ...
STATIC LIQUEFACTION IN TAILINGS DAM AND FLOW FAILURE
3 components characteristics of the tailings materials. The internal friction angle ranges 18–38º for tailings (Rodríguez, 2002, 2006). The cohesion is cero for tailings, sand, gravel, etc. According to Equation (3), when the pore water pressure increases, the shear
What are Tailings? | Canada''s Oil Sands Innovation Alliance …
· Tailings are the leftover materials from mining, whether that''s mining for gold, tungsten, coal or oil. In Alberta, just three percent of the oil sands are accessible for mining and while mining activities are sometimes erroneously thought to take up an area the size of the UK, the actual mining footprint in northeastern Alberta is about equivalent in size to the city of Edmonton.
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