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 completion of the second tailings dam at Panasqueira will ensure the tailings to be generated in the next 10 years from this historic mine to find its place in this new tailings dam assuring the continued seamless operation of the mine which has more than 20 years of LOM under NI 41-101 resources.
This led to a large amount of radioactive contaminated material from the mining industry being disposed of in waste dumps and tailing sites.
Yankee Doodle is a pond-like impoundment that holds water and tailings, the waste left over from ore extraction at Montana Resources copper and molybdenum mine.
To meet international engineering standards, the tailing's dam foundation was stripped of all alluvial material down to base rock and keyed in to reduce seepage.
Regional Tailings Engineers, the TSF specialists who report to the Chief Operating Officer, conduct quarterly inspections of active TSFs, thereby providing a second layer of governance to ensure safe management of our TSFs.
The newly established Taskforce will be accountable for enhancing BHP's focus on tailings, it said.
The disaster follows a similar event in 2015, when another tailings dam in Minas Gerais owned by Samarco a joint venture between Vale and BHP Billiton--collapsed, killing 19 people.
Richard Elmer, regional manager for Knight Piesold UK, said, "The current tailings auditing and management business consists of semiannual or annual site visits with recommendations based on these visits.
Two types of iron ore tailings were provided by the company Vale S/A, from the Mine Alegria, in the municipality of Mariana, State of Minas Gerais.
In previous studies, the effects of flocculants on structural stability were ignored, and thickened tailings slurries were simplified as Bingham plastic fluid in pipeline transportation, whose flow properties were time-independent [5].
The cohesion c and the internal friction angle [phi] of lime-reinforced iron tailings powder with different lime doses were calculated according to the Mohr-Coulomb principle (Equation (2)) and are plotted in Figure 6:
Mining activities at the Huogeqi Copper Mine, located in Inner Mongolia, China, have been conducted since 1986, resulting in a large quantity of mining wastes including tailings and waste rock.