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Hematite Iron Oxide Processing

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A process for the production of a black iron oxide pigment from fe 2 o 3 hematite iron oxide which may be an impure oxide produced by the ruthner process or by other means, or which may be a mineral hematite. the process may be used to upgrade poor quality synthetic or natural hematite, or to improve their performance as red pigments, by conversion to black pigment with subsequent ...

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