Mineral processing
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Mineral processing is the process of separating commercially valuable minerals from their ores in the field of extractive metallurgy. Depending on the processes used in each instance, it is often refe
A set of Cornish stamps
Froth flotation cells used to concentrate copper and nickel sulfide minerals
Screening ore through a sieve, Fixed Nitrogen Research Laboratory, 1930
Gangue
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Gangue, or veinstone, is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock
Mineral processing
…often referred to as ore dressing or ore milling. Beneficiation is any process that improves (benefits) the economic value of the ore by removing the gangue minerals, which results in a higher grade product (ore concentrate) and a waste stream (tailings). There are many different types of beneficiation…
Crystals of cassiterite, a commercially valuable ore mineral, in a matrix of quartz, the gangue
Banded Zn-Pb ore sample with sphalerite (brown) and galena (silver-grey) as main ore minerals and calcite (white) as main gangue mineral
Native gold partially contained within a quartz gangue, visible at lower left.