Tailings

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tailings

[′tāl·iŋz]
(engineering)
The lighter particles which pass over a sieve in milling, crushing, or purifying operations.
(mining engineering)
The parts, or a part, of any incoherent or fluid material separated as refuse, or separately treated as inferior in quality or value.
The decomposed outcrop of a vein or bed.
The refuse material resulting from processing ground ore.

Tailings

 

in ore dressing, the refuse material resulting from the concentration of minerals. Tailings contain a lesser amount of the valuable component than does the initial raw material. They consist mainly of gangue; the useful components are contained in such amounts or forms that they cannot be extracted as concentrates by means of conventional technology. The metal content in tailings removed from ores amounts to hundredths of a percent. Tailings resulting from the concentration of coal are characterized by an ash content that may be as high as 70 percent. For the purpose of combined processing of mineral raw materials, tailings are retreated to obtain, for example, aluminum with a high alumina content, or are used as fluxes or building materials. In the future, tailings stored in tailing ponds may be retreated to obtain metals.

tailings

1. Stones which do not pass through the largest openings of a screen used to separate sizes (as after a crushing operation).
2. The residue or leavings of any product.
References in periodicals archive ?
The potential of indigenous vegetations for phytostabilization of gold mine tailings.
However, the combination of contamination, land use, and climatic conditions, suitable for year-round growing, makes the Vatukoula mine tailings an interesting site for phytoremediation research.
The sources of the metals are the Asu River Shales, the mineralised veins and the mine tailings.
No environmental laws exist to prevent INCO from digging up large portions of the reef and using its calcium carbonate to neutralize the millions of tons of acidic mine tailings it will produce.
We've been looking for different ways to make the material useful, such as covering landfills, and now the mine tailings.
It is the scale of the operation that makes the mine so destructive: Ok Tedi dumps over 80,000 tons of mine tailings waste every day into the Fly River system.
a mountain of tailings with trees stuck on top), for permission to bury approximately 8000 acres of the bottom of Lynn Canal in mine tailings.
They chatter about the need to "internalize externalities," pressing for eco-taxes on greenhouse gases, sulfur dioxide emissions, wasteful packaging, noise, fumes, mine tailings, chemical consumption, and any other perceived "bad" that captures their attention.
You would think that Thomas Egan, whose company dumps thousands of tons of untreated mine tailings into the rivers of Irian Jaya on a daily basis, would hesitate before accusing others of engaging in activity whose end result is to create rivers of poison.
Mine tailings discarded near the creek over the years have greatly reduced the water quality in the area.
to provide construction services for a mine tailings facility at the Morenci mine in southeast Arizona.
V:SCZ) further to the Company's press release of January 5th, 2015 in which Santacruz advised that a pipeline connecting the Rosario Mine tailings impoundment to a secondary settling pond ruptured causing water and tailings material to be discharged outside of the tailings treatment system, the Company provides the following update.