Pretreatment of refractory titaniferous ores

C - Chemistry – Metallurgy – 22 – B

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C22B 34/12 (2006.01) C22B 1/02 (2006.01)

Patent

CA 2591335

A process for increasing the solubility of titanium in oxidized titanium compounds, titaniferous ore, ore concentrate, or mixtures thereof. The process includes adding an iron compound to the titaniferous ore or ore concentrate, mixing to form a mixture, heating under a controlled atmosphere to form an iron-titanium compound, cooling, and milling to form a powder. The solubility in concentrated hydrochloric acid of the titanium in the powder is greater than the solubility of the titanium in the titaniferous ore or ore concentrate.

La présente invention se rapporte à un procédé permettant d'augmenter la solubilité du titane dans des composés de titane oxydé, de minerai titanifère, de concentré de minerai, ou des mélanges de ces derniers. Le procédé selon l'invention consiste à ajouter un composé de fer au minerai titanifère ou au concentré de minerai, à mélanger pour former un mélange, à chauffer dans une atmosphère contrôlée pour former un composé de fer-titane, à refroidir, et à broyer pour former une poudre. La solubilité dans l'acide chlorhydrique concentré du titane contenu dans la poudre est supérieure à la solubilité du titane présent dans le minerai titanifère ou le concentré de minerai.

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