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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 ?
Chapter Twelve Hemodialysis Concentrates New Project Investment Feasibility Analysis
Heavy-metal-free color concentrates, liquid colorants, and dry powder colorants with diverse colorant-loading levels and additive packages.
McLaughlin concentrates his practice in the federal taxation of international mergers, acquisitions, and corporate reorganizations, as well as all aspects of international tax planning.
Available as dry powders; damped with oils, water or plasticizers; dispersions in oils, water or plasticizers; or predispersed in nondusting forms under the tradenames of Fyrebloc for pellet concentrates and Envirostrand for a high-loading patented strand product.
In addition, with GLUCOPON Surfactant Concentrates, overall manufacturing costs can be lowered.
Get a detailed picture of the concentrates industry
Dry powder or compounding of lubricant/ processing aid masterbatches from lb to truckload quantities in all resin systems and additives combined with colorants to provide multifunctional concentrates.
These findings further support and provide confirmation of previous studies regarding the clinical benefit of monoclonal antibody purified factor concentrate on the immune systems of HIV-positive persons with hemophilia," commented Garrett E.
This Liquid Noni Concentrate features rhodiola, ginkgo and huperzine extracts in a noni extract base.
Additive concentrates may contain light or heat stabilizers, colors, slip and blowing agents.
Showing 1-micron calcium carbonate concentrates for PE, PP, and PS.
Invitations to bid for lead & zinc concentrates issued to international traders