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    An estimated 90 percent of all manganese is used in the production of steel The addition of manganese as an alloying agent to steel makes up about 70 percent of this usage While most standard steels have a manganese content ranging between 0 15 percent and 0 8 percent genuine Hadfield grade Tensamang manganese steel plate contains between 11 percent and 14 percent

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    Mineral Royalties Indian Bureau of Mines

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    Manganese Mn Chemical properties Health and Environmental

    Manganese occurs principally as pyrolusite MnO2 and to a lesser extent as rhodochrosite MnCO3 More than 25 million tonnes are mined every year representing 5 million tons of the metal and reserves are estimated to exeed 3 billion tonnes of the metal The main mining areas for manganese ores are South Africa Manganese occurs principally as pyrolusite MnO2 and to a lesser extent as rhodochrosite MnCO3 More than 25 million tonnes are mined every year representing 5 million tons of the metal and reserves are estimated to exeed 3 billion tonnes of the metal The main mining areas for manganese ores are South Africa

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    The Nautilus Minerals quotSolwara 1 quot vent SMS mining project in PNG waters will likely be the first deep sea mining project with others following elsewhere in PNG Tonga and Fiji Others projects to watch in national waters include Odyssey s Don Diego phosphate mining project off Baja and manganese nodule mining in the Cook Islands

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