Today, the universal disposal method for tailings is the tailing pond. Tailings are slurried with water and pumped to tailing ponds for settling. Frequently, tailings are cyclone-classified before deposition. Coarse sands are used to build-up the tailing dam, while the slimes are deposited inside the pond.
Tailings can be discharged using subaqueous (below water) or subaerial techniques (above the water line, on the ground or on the tailings beach) (DPI 2003). The choice between these methods can dramatically effect how the tailings deposit and settle within the impoundment.
This tailings disposal method solve the problem of efficient dewatering of fine and fine tailings and opens up a new way to promote the comprehensive utilization of tailings, which has been successfully applied in many mines.
Mine tailings are reused for producing clay, tiles, glass, and concrete. Mine water is treated and then used for dust and particulate suppression, agricultural/industrial use, and as a coolant. Despite numerous recycling methods, the majority of mine waste is still stored in facilities or waste sites.
Tailings dry stacking is a new tailings disposal method, which mainly uses the dehydrating hydrocyclone, high-frequency dewatering screen, high-efficiency deep cone thickener. This tailings disposal method can reduce the water content in tailings to less than 15%, save cost and effectively avoid environmental pollution.
Mar 08, 2016· Tailings Disposal Method Risk Date: March 8, 2016 Author: Ken Kuchling After the Mt Polley and Samarco tailings failures, there have been ongoing discussions about the benefits of filtered (dry stack) tailings as the only way to eliminate the risk of catastrophic failure.
Historically, tailings were disposed of in the most convenient manner, such as in downstream running water or down drains. Because of concerns about these sediments in the water and other issues, tailings ponds came into use. The sustainability challenge in the management of tailings and waste rock is to dispose of material, such that it is inert or, if not, stable and contained, to minimise water and energy inputs and the surface footprint of wastes and to move toward findin
The predominant method of tailings disposal is by pumping and sub-aerial deposition of an aqueous slurry (typically at 30–45% initial solids concentration by mass and an initial gravimetric moisture content, w, of 233–122%) to a surface TSF.
As there is seldom enough ground available on which the tailing of a flotation plant can be run to waste without being stacked, it is usual to impound it in some form of dam where the solids can be deposited and the water decanted off for return to the plant. It is generally advisable to recover as much of the water as possible in order not only to save the expense of obtaining a fresh supply
Historically, tailings were routinely discharged directly into the nearest surface water course (Vick 1990). In some parts of the world this is still practiced today, particularly in areas of high rainfall and steep and unstable terrain.
Paste tailings is a modification to the conventional methods of disposal of tailings (pond storage). Conventional tailings slurries are composed of a low percent of solids and relatively high water content (normally ranging from 20% to 60% solids for most hard rock mining) and when deposited into the tailings pond the solids and liquids separate.
Paste tailings disposal method using a central drain at a relatively flat surface with a floating water accumulation system on the back of a surrounding wall. Regarding the topography of the area and surface conditions, this method can be used in Sangan. 4
4 Filtered tailings disposal 4.1 The promise The driver for implementing the filtered tailings disposal method is often related to one of the following: • Improved water conservation: a limited water supply is an important driver for tailings filtration as it can help maximise water conservation and water recycling.
The disposal of tailings adds to the production costs, so it is essential to make disposal as cheap as possible. This requirement led initially to the development of the once commonly used upstream method of tailings dam construction, so named because the centerline of
According to Leduc & Smith (2003) the estimated total costs (incl. capital and operating) for certain co-disposal methods presented in their paper vary between $0.15 and $0.5 per tonne of tailings. (Note: the methods are partly different than those presented in Figure 1). Design requirements. The selection of the suitable co-disposal method
1.1 Co-disposal Terminology . In mine waste management, “co-disposal” refers to the disposal of tailings and rock streams in one mine integrated disposal facility. There are various forms of codisposal, depending on the degree of mixing of the waste streams. Co-disposal can be generally divided into three forms: Co-placement
disposal in the open quarry, disposal in sea, lake, and river beds, surface paste tailing disposal, and tailing disposal using geotextile material are the primary surface tailing disposal methods. Even though tailing dams are the most used method for the disposal of mine tailings
2.1 Methods for Tailings Disposal Because mine tailings produced by the mill are usually hi slurry form, disposal of slurry tailings in impoundments made of local materials is the most common and economical method of disposal. There are four main types of slurry impoundment layouts; valley impoundments, ring dikes, in-pit impoundments, and
Production of tailings The disposal of tailings is commonly identified as the single most important source of environmental impact for many mining operations (Vick 1990). This is not surprising when considering that the volume of tailings requiring storage can often exceed the in
Jun 24, 2020· Tailings dams, some of which tower dozens of meters high and stretch for several kilometers, are the most common waste-disposal method for miners. Brazil has banned new upstream mining dams and
Tailings Disposal Methods Pond Storage. There are many different subsets of this method. Large earthen dams may be constructed and then filled with the tailings. Tailings may be deposited into natural geographical depressions. Exhausted open pit mines may be refilled with tailings. In all instances, due consideration must be made to
Apr 23, 2019· The safe management and storage of tailings is paramount for any mine operation,” says Job Kruyswijk, Tailings Process Specialist for Weir Minerals. The traditional means of tailings disposal is typically an impound method, often stored in a constructed dam in diluted form.
Jun 21, 2017· This method will make the solution economically competitive with traditional tailings disposal methods for large mines. The method of co-mingling tailings with mine waste in a continuous process produces a new type of waste called GeoWaste. The filtered tailings cost is minimized by using fast filtering technology and waste rock to provide
Deep sea mining tailings disposal is a new environmental challenge related to water pollution, mineral crust waste handling, and ocean biology. The objective of this paper is to propose a new tailings disposal procedure for the deep sea mining industry. Through comparisons of the tailings disposal methods which exist in on-land mining and the coastal mining fields, a new tailings disposal
Commonly referred to as STD (Submarine Tailings Disposal) or DSTD (Deep Sea Tailings Disposal). If a mine is located in close proximity to the coast, and the coast itself is not an excessive distance from a continental shelf, STD is conceptually an excellent method for the disposal of tailings.
tailings facilities in operation worldwide as of 2000 • In 2010, Davies, et al. estimated that only approximately 100 facilities were using alternative disposal methods (co-disposal, surface paste, filtered, thickened) • Conventional disposal still comprises the vast majority of all tailings operations world wide (perhaps 3,400 of 3,500)
The correct measurement of dry bulk density to account for moisture content is often overlooked in tailings dump Mineral Resource estimation. Often, an overly simplistic method is used to estimate the bulk density and this can cause significant errors in tonnage estimation and, consequently, an over estimate of metal content.
Traditional tailings disposal includes slurrying of the tailings materials for transport by pipeline to the TSF. This transport method results in large volumes of water reporting to the TSF where this slurry water, combined with runoff from normal precipitation and extreme storm events, results in ponds of water on the surface of the TSF.
Dewatered stockpiling (dry stacking) is a safer alternative to tailings dams (Rico et al., 2008, ) for tailings disposal; however, this method has not yet been used in iron ore mines in Brazil
May 06, 2020· Ore body variability can have a significant effect on the various elements of mine waste tailings disposal systems, including: thickening systems, tailings pump and pipeline systems, and tailings storage facilities. Ore bodies that are exploited using open-pit mining methods often consist of softer, weathered, clay-containing material near to the surface (oxides), transitioning to harder rock
Besides conventional dams, there are other tailings disposal methods, including: Backfilling: tailings are usually combined with a binder like cement, then used to fill voids in underground operations. This is widely considered the safest form of tailings disposal. Filtered Tailings: (sometimes called dry stack): tailings that have a reduced
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