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 hammers wielded by hand, a process called "spalling". Before long . This is a very tedious process, particularly when the individual particles are small. Another.
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 . Mineral particles smaller than 50 micrometres can be classified by different.