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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 ?
began pelletizing its own CaCO3 concentrate 18 months ago in its North Vernon, Ind.
The Celution(TM) System is designed to automate the proprietary process and methods developed by Cytori scientists to isolate and concentrate a high yield of a patient's own stem and regenerative cells from adipose tissue without the need for cell culture (repeated cell divisions).
The concentrate is available in three flavors: lemon, raspberry and green tea with honey, with a suggested retail price of $1.
The rat studies indicate that the concentrate with the longest effective chains offers, per gram of beta-glucan, up to 2-1/2 times the cholesterol-reducing potency of the intact bran, Malkki reports.
Endex 1040 is a concentrate based on OBSH in PE carrier resin.
Real fruit juice concentrate is a pain in the butt," says Frookies' Rich Worth.
The study Soy protein concentrate (CAS 9010-10-0) Market Research Report 2010 presents an overview of the Soy protein concentrate market globally and regionally by contemplating and analyzing its parameters.
Colortherm yellow iron oxides and zinc ferrites with improved temperature capabilities offer superior lightfastness, can be compounded in concentrate, and find applications in polyolefins and some engineering plastics.
Concentrate FR 40173 with a maximum operating temperature of 520 F aimed primarily at unfilled PP.
PAC-0154 is an economical, high-efficiency processing-aid concentrate said to offer a superior combination of properties and lower usage levels than earlier concentrates.