Roasting of titaniferous materials
AssigneeRGC Mineral Sands Limited
InventorsHarold Robert Harris, Ian Edward Grey
Life of this patent
Estimating the term…
Abstract
A method and apparatus of introducing one or more reagents into a rotary and/or elongate kiln in which titaniferous material is being treated eg 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.
Claims18
In a process for treating titaniferous material comprising feeding the titaniferous material to a rotary and/or elongated kiln at one or more feed ports means positioned at or adjacent a feed end of the kiln, providing conditions in the kiln to upgrade the titaniferous material to produce an upgraded titaniferous product, and recovering a mixture which includes the upgraded titaniferous product from the kiln at discharge port means at or adjacent a discharge end of the kiln, wherein one or more reagents are introduced into the kiln (i) at a plurality of locations along the length of the kiln, and/or (ii) at or adjacent to said discharge end of the kiln, said reagents including all solid and fluid materials introduced into the kiln except titaniferous ores, combustion air and carbonaceous materials.
In a process for treating titaniferous material, comprising feeding the titaniferous material and a reductant to an elongated kiln at one or more feed port means, positioned at or adjacent a feed end of the kiln, providing conditions in the kiln whereby iron oxides in the titaniferous material are reduced largely to metallic iron or a ferrous state in the kiln, thereby producing a reduced titaniferous material, and recovering a mixture which includes the reduced titaniferous material from the kiln at discharge port means at or adjacent a discharge end of the kiln, wherein one or more reagents are, for enhanced incorporation of said reagent(s), introduced into the kiln (i) at a plurality of locations along the length of the kiln, and/or (ii) at or adjacent to said discharge end of the kiln, said reagents including all solid and fluid materials introduced into the kiln except titaniferous ores, combustion air and carbonaceous materials.
In a process for treating titaniferous material comprising feeding the titaniferous material to a rotary and/or elongated kiln at one or more feed ports means positioned at or adjacent a feed end of the kiln, providing conditions in the kiln to upgrade the titaniferous material to produce an upgraded titaniferous product, and recovering a mixture which includes the upgraded titaniferous product from the kiln at discharge port means at or adjacent a discharge end of the kiln, wherein one or more reagents are introduced into the kiln at a plurality of locations along the length of the kiln, said reagents including all solid and fluid materials introduced into the kiln except titaniferous ores, combustion air and carbonaceous materials.
In a process for treating titaniferous material comprising feeding the titaniferous material to a rotary and/or elongated kiln at one or more feed ports means positioned at or adjacent a feed end of the kiln, providing conditions in the kiln to upgrade the titaniferous material to produce an upgraded titaniferous product, and recovering a mixture which includes the upgraded titaniferous product from the kiln at discharge port means at or adjacent a discharge end of the kiln, wherein one or more reagents are introduced into the kiln at or adjacent to said discharge end of the kiln, said reagents including all solid and fluid materials introduced into the kiln except titaniferous ores, combustion air and carbonaceous materials.
Dependencies are inferred from the claim text.