Search results
Results from the WOW.Com Content Network
The mineral pyrite (/ ˈ p aɪ r aɪ t / PY-ryte), [6] or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S 2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. [7] Pyrite cubic crystals on marl from Navajún, La Rioja, Spain (size: 95 by 78 millimetres [3.7 by 3.1 in], 512 grams [18.1 oz ...
At the end of the conflict, the cease-fire demarcation line divided the holdings of the largest mining firm in the country, Cyprus Mines, causing their shutdown [2] and sale to Hellenic Copper Mines Ltd. [5] As a result of near complete extraction of copper and iron pyrite ore, [1] and the expense of extracting the remaining low grade deposits ...
Extractive metallurgy is a branch of metallurgical engineering wherein process and methods of extraction of metals from their natural mineral deposits are studied. The field is a materials science, covering all aspects of the types of ore, washing, concentration, separation, chemical processes and extraction of pure metal and their alloying to suit various applications, sometimes for direct ...
Bioleaching is the extraction or liberation of metals from their ores through the use of living organisms.Bioleaching is one of several applications within biohydrometallurgy and several methods are used to treat ores or concentrates containing copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt.
Reproduction of the malacate in the old Peña del Hierro Mine. The area of the Iberian Pyrite Belt had already been exploited for more than 3000 years — in the Chalcolithic and by peoples such as Tartessians, Phoenicians and Romans, [3] [4] who extracted iron pyrites, copper, silver and other metals from them. [5]
But there was limited use of native (unsmelted) iron ore, from magnetite, iron pyrite and ilmenite (iron–titanium), especially in the Andes (Chavin and Moche cultures) and Mesoamerica, after 900 BC and until c. 500 CE. Various forms of iron ore were mined, [30] drilled and highly polished.
Extracting usable metal from iron ores requires kilns or furnaces capable of reaching 1,500 °C (2,730 °F), ... The best known sulfide is iron pyrite (FeS 2), ...
Leaching is a process widely used in extractive metallurgy where ore is treated with chemicals to convert the valuable metals within the ore, into soluble salts while the impurity remains insoluble.