Recovery of titanium dioxide from titanium oxide bearing...

Details Recovery of titanium dioxide from titanium oxide bearing... Recovery of titanium dioxide from titanium oxide bearing...

C - Chemistry, Metallurgy

22

B

C22B 34/12 (2006.01) C01G 23/047 (2006.01) C01G 23/053 (2006.01) C22B 3/08 (2006.01) C22B 7/04 (2006.01)

Patent

CA 2431257

A method of recovering titanium dioxide from a titanium oxide bearing raw material, such as e.g. steel slags rich in TiO2 includes the steps of grinding the titanium dioxide raw material, reacting the particulate raw feed material with sulphuric acid under specified conditions, digesting and filtering the resultant cake material containing titanyl sulphate, hydrolysing the titanyl sulphate and, after washing the hydrolysate, calcining the hydrolysate to produce titanium dioxide.

L'invention concerne un procédé de récupération de dioxyde de titane dans une matière première contenant du dioxyde de titane, telle que des scories pour l'acier riches en TiO2. Ledit procédé consiste à broyer la matière première contenant du dioxyde de titane, à faire réagir la matière première particulaire de départ avec de l'acide sulfurique dans des conditions spécifiées, à digérer et à filtrer le gâteau contenant du sulfate de titanyle, à hydrolyser le sulfate de titanyle et, après le lavage de l'hydrolysat, à le calciner, de sorte que du dioxyde de titane soit produit.

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