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61Mineral processing — Crushing, a form of comminution, one of the unit operations of mineral processing In the field of extractive metallurgy, mineral processing, also known as mineral dressing or ore dressing, is the process of separating commercially valuable… …
62Postverk Føroya — Infobox Company company name = P/F Postverk Føroya company company type = Joint stock company company slogan = foundation = 1976 location = Tórshavn,Faroe Islands key people = num employees = 380 products = Mail revenue = ?| homepage =… …
63Lackawanna Steel Company — Infobox Company company name = Lackawanna Steel Company company company type = Public genre = foundation = 1840 founder = George W. Scranton, Seldon T. Scranton, William Henry location city = Scranton, Pennsylvania (1840 1902) Lackawanna, New… …
64vanadium processing — Introduction preparation of the metal for use in various products. Vanadium (V) is a grayish silver metal whose crystal structure is a body centred cubic (bcc) lattice, with a melting point of 1,926° C (3,499° F). The metal is used… …
65zinc processing — Introduction preparation of the ore for use in various products. Zinc (Zn) is a metallic element of hexagonal close packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate hardness and can …
66Liberia — Liberian, adj., n. /luy bear ee euh/, n. a republic in W Africa: founded by freed American slaves 1822. 2,602,068; ab. 43,000 sq. mi. (111,000 sq. km). Cap.: Monrovia. * * * Liberia Introduction Liberia Background: Seven years of civil strife… …
67lead processing — Introduction preparation of the ore for use in various products. Lead (Pb) is one of the oldest metals known, being one of seven metals used in the ancient world (the others are gold, silver, copper, iron, tin, and mercury). Its low… …
68Roman army of the mid-Republic — Contemporary portrait of Scipio Africanus, engraved on a gold signet ring manufactured in Capua, S. Italy, Considered the greatest Roman military leader of the Second Punic War, Scipio permanently drove the Carthaginians out of Spain in a series… …
69Mining in Mauritania — Mauritania’s mineral sector was dominated by iron ore mining and benefciation. Other mineral commodities produced in the country included cement, copper, gold, gypsum, petroleum, salt, and steel. The Ministère des Mines et de l’Industrie was the… …
70Mill (grinding) — Mill A tabletop hammer mill Other names Grinding mill Uses Grinding Related items Mortar and pestle Expeller Extruder A grinding mill is …
