معالجة خام mangenese

Manganese processing Extraction, Uses Benefits Britannica

OverviewHistoryOresMining and concentratingExtraction and refiningHigh-carbon ferromanganeseSilicomanganeseMedium- and low-carbon ferromanganeseElectrolytic manganesemanganese processing, preparation of the ore for use in various products.Manganese (Mn) is a hard, silvery white metal with a melting point of 1,244 °C (2,271 °F). Ordinarily too brittle to be of structural value itself, it is an essential agent in steelmaking, in which it removes impurities such as sulfur and oxygen and adds important physical properties to the mManganese is an allotropic metal—that is, its crystal structure changes with temperature. While Manganese metal oxidizes superficially in air, rusts in moist air, and burns in air or oxygen at elevated temperatures. It decomposes water slowly when cool and rapidly when heated, forming hydrogen gas and manganous hydroxide, and it dissolves readily in dilute mineral acids, genera在britannica上