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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 ?
One bottle of the new concentrated formula will deep clean and protect approximately 1,200 to 1,600 square feet of carpet, or about six to eight average-size rooms, depending on the cleaning method used.
A single gallon of this highly concentrated formula creates nearly 10 gallons of finished concrete sealer.
The concentrated formula activates with water from a garden hose to reach second story windows, siding and gutters effortlessly.
This new, highly concentrated formula finally allows for precise, targeted application.
Elderberry Immune Support: Gummies with a concentrated formula featuring a burst of Elderberry, Vitamin C and Zinc to help support the maturing immune system.
VitalOils 1000's high potency and concentrated formula is manufactured under strict U.
Its concentrated formula brings professional-quality strength and power to eliminate carbon deposit buildup with a single use.
Control III Disinfectant Germicide -- Concentrated formula.
AndroForte's concentrated formula is thoroughly absorbed within 30 seconds.
CC CREAM FOR HAIR The first-ever CC cream designed to protect and nourish hair, Alterna Caviar CC Cream ($25) boasts ten benefits in one concentrated formula and contains groundbreaking color-protecting technology.
20, 1996--Carnation is voluntarily recalling one production code of Carnation Alsoy Concentrate soy formula in 13 fluid ounce cans because it is mislabeled in a way that could lead to infants consuming undiluted concentrated formula.
The pacs contain a super concentrated formula with a split personality: tough on dirt, but gentle on your favorite garments and sensitive skin.

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