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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 ?
Product coverage: Liquid Concentrates, Powder Concentrates.
MIP 6641/009, MRC R-48 for Portable AFFF Extinguishers provides a SPMIG with only one stock number which is for the 6% AFFF concentrate.
Consistent concentrate is essential to getting higher loadings into film, says Heritage Bags' Ruiz.
To facilitate processing and delivery of adipose stem and regenerative cells, Cytori has developed its proprietary Celution(TM) System to isolate and concentrate a patient's own stem and regenerative cells in about an hour.
By dropping the temperature and drastically reducing the time spent heated, cooked flavors are avoided, and the quality of the concentrate improves significantly.
The chapter on "Provenance and crust-mantle evolution studies based on radiogenic isotopes in sedimentary rocks," by Jonathan Patchett concentrates on the use of Sm-Nd, Lu-Hf and Rb-Sr isotopic approaches to problems of sedimentary provenance, tectonic environments and crust-mantle evolution.
If so, choose a soy protein concentrate capable of being formulated to the level that delivers 6.
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.
New endothermic chemical foaming agent concentrate CFAC-5050MT for use in PE, PS and PP.
The article recounted that San Joaquin valley grape growers once viewed concentrate as market for surplus grapes, just as dessert/aperitif wines once were used to sop up grapes not used for raisins or table grapes.
Real fruit juice concentrate is a pain in the butt," says Frookies' Rich Worth.