Roasting of titaniferous materials

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 34/12 (2006.01) C22B 1/02 (2006.01) C22B 5/02 (2006.01) F27B 7/00 (2006.01) F27B 7/32 (2006.01) F27B 7/36 (2006.01)

Patent

CA 2172277

A method and apparatus of introducing one or more reagents into a rotary and/or elongate kiln in which titaniferous material is being treated e.g. upgraded wherein the reagent(s) is introduced (I) at a plurality of locations along the length of the kiln and/or (II) at or adjacent to a discharge end of the kiln. The reagents may comprise one or more of chlorine-containing compounds, sulphur, sulphur-containing compounds, magnesium compounds, manganese compounds, fluxes and glass-forming reagents, including a borate salt or mineral. The reagent may be mixed with the discharge end coal or introduced separately.

Procédé pour introduire, dans un four rotatif et/ou long pendant le traitement de matériaux titanifères par exemple en vue de les enrichir, un ou plusieurs réactifs (I) en différents points répartis le long du four et/ou (II) en un point situé au niveau ou à proximité de son orifice de défournement. Ces réactifs peuvent consister en un ou plusieurs composés chlorés, en soufre, en composés soufrés, en composés magnésiques, en composés manganésiques, et en réactifs fluxogènes ou vétrogènes dont un borate ou un minéral. Le réactif peut être mélangé au charbon sortant de l'orifice de défournement ou introduit séparément.

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