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[5] For sulfide ores, a different process is taken for beneficiation. The ore needs to have the sulfur removed before smelting can begin. Roasting is the primary method of separating, where wood was placed on heaps of ore and set on fire to help with oxidation. [6] [7] 2 Cu 2 S + 3 O 2 → 2 Cu 2 O + 2 SO 2
A zinc mine is a mine that produces zinc minerals in ore as its primary product. Common co-products in zinc ores include minerals of lead and silver . Other mines may produce zinc minerals as a by-product of the production of ores containing more valuable minerals or metals, such as gold , silver or copper . [ 1 ]
Pages for logged out editors learn more. Contributions; Talk; Ore processing
Surface gold mine with haul truck in foreground, in Kalgoorlie, Australia. Mining engineering is the extraction of minerals from the ground. It is associated with many other disciplines, such as mineral processing, exploration, excavation, geology, metallurgy, geotechnical engineering and surveying.
Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal behind. The reducing agent is commonly a fossil-fuel source of carbon, such as carbon monoxide from incomplete combustion of coke—or, in earlier times, of charcoal. [1]
Gold cyanidation (also known as the cyanide process or the MacArthur–Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore through conversion to a water-soluble coordination complex.
Additionally, the roasting process can eliminate harmful impurities such as crystalline water, sulfur, and arsenic from the ore, loosening the ore structure and enhancing subsequent grinding efficiency. [3] Researchers in mineral processing have been developing magnetic roasting technology for iron ore since the early 20th century.
For reasons related to ore processing the ore in Kiruna Mine is divided into two quality types based on chemistry, phosphorus-poor B-ore and phosphorus-rich D-ore, the latter being more common closer to the surface. [11] Within the orebody, there is a volume of hematite ore with the same strike (direction) as the main orebody. [15]