Method for Increasing the Yield When Chlorinating Titaniferous Raw Materials
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United States of America Patent
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Issued Date -
Jun 11, 2009
app pub date -
Nov 13, 2008
filing date -
Dec 5, 2007
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Abandoned
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Abstract
A method for reprocessing cyclone dust occurring during the carbochlorination of titaniferous raw materials, which essentially consists of titanium dioxide, coke and other inert metal oxides, such as silicon dioxide, and for returning a coke-rich and/or a TiO.sub.2-rich fraction to the chlorination reactor includes: preparing an aqueous suspension of the cyclone dust; separating a coke-rich fraction (1) from the aqueous suspension by flotation; adding hydrofluoric acid to the remaining suspension; and separating a TiO.sub.2-rich fraction (2) by flotation from the remaining suspension.
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