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To increase the amount of a dissolved substance by evaporation.
(mining engineering)
To separate ore or metal from its containing rock or earth.
The clean product recovered in froth flotation or other methods of mineral separation.



(in mining), a product of mineral dressing that is more suitable for use or further processing than the initial raw material. In most cases, direct use of the extracted rock or its metallurgical or chemical processing is economically unfeasible and sometimes even technically impossible. A concentrate may have a high content of a valuable component (such as a metal), a small quantity of impurities (for example, iron and titanium in glass sand), or the required size (graded anthracite).

The quality of concentrates is regulated by government standards or by technical specifications that determine the size and the content of valuable components, undesirable impurities, and moisture. For example, concentrate must contain Pb > 70 percent, SiO2 < 2 percent, Cu < 1.5 percent, Zn < 2.5 percent, and Fe < 8 percent for lead hearth smelting and Pb > 30 percent, Cu < 4 percent, and Zn < 12 percent for shaft smelting.

A distinction is made among preconcentrate (coarse or crude concentrate), which is subjected to further dressing; bulk concentrate, which contains several valuable components; and final concentrate. In most cases, concentrate is a raw material for metallurgical, chemical, and other production processes.

References in periodicals archive ?
Researchers at Michigan State University have developed a solution: a luminescent solar concentrator placed over a window that produces solar power while remaining transparent.
Some possible configurations for holographic solar concentrators are shown below.
StoneFly's i1000 and i1500 Storage Concentrators are now available through its channel distribution partners and select resellers.
3 percent of high-noon, sunny-day sunlight into electricity, meets a goal set by the Department of energy in 1986 for concentrator efficiency.
s new report "Oxygen Concentrator Market Shares, Strategies, and Forecasts, Worldwide, 2012 to 2018" to their offering.
Because IP-optimized DSL concentrators aggregate Internet traffic separately from video traffic, providers can deploy them in much simpler networking configurations than ATM-based DSLAMs, and with less investment in upstream supporting equipment, including ATM switches and subscriber management systems.
COPENHAGEN, Denmark -- Echelon Corporation (NASDAQ:ELON), a global networking company providing technology and solutions for controls, smart metering, and energy and environment management, unveiled the DC-1000/SL Data Concentrator for its Networked Energy Services (NES) advanced metering system today at the Metering & Billing/CRM Europe 2006 event in Copenhagen.
However, the multimegabit access concentrator protects users against such failures.
In addition to our expanding business using our proprietary AquaMax(TM) drives, the pending acquisition of ENTECH, when completed, will give us unmatched solar concentrator applications, enabling us to compete on large-scale systems of one to 100 megawatts or more that can efficiently harness the sun's power for large industrial and municipal electricity supply.
One of the most compelling technological developments driving the analysts' estimates is access concentrator technology, which provides the benefits of DSL without the conventional technical and economic constraints.
Worldwide oxygen concentrator markets at $349 million in 2005 are anticipated to reach $1.
Allied currently provides approximately 1,250 oxygen cylinders per day to pharmacies in the United Kingdom and oxygen concentrators to a total of approximately 1,650 patients at home in Northern Ireland.