In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the . Before the advent of heavy machinery the raw ore was broken up using . Crushing and grinding are the two primary comminution processes.
underground mines; the crushing and grinding of ore; the separation of valuable minerals from . Emissions from these various pieces of equipment are often.
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Mineral processing, art of treating crude ores and mineral products in order to . is not suitable for machine sampling (slimy ore, for example) or where machinery is . begins by crushing the ore to below a certain size and finishes by grinding it.