Separating titania from treated slag by gravity separation or flotation

In the blast furnace slag, titanium disseminates in various mineral phases. Titanium could be concentrated mainly in perovskite, which could be selectively precipitated and grown by optimizing the operation factors like slag composition, temperature of heat treatment and additives. The titanium slag mineralography and the distribution in the as received slag and the treated slag, as well as the methods of perovskite separation were studied. After treatment, the grain size is increased from 5 μm to 200 μm, the content of TiO 2 in perovskite increases from 48% to 81%, the morphology changes from snow shaped grain to coarse dendrites or equiaxed crystals. A concentrate is produced by gravity separation analyzing 35.25% TiO 2 with a recovery of 68.28% and a tailing analyzing 9.53% TiO 2. A concentrate analyzing 40.08% TiO 2 and a tailing analyzing 9.28% TiO 2 can be obtained by flotation.

In the blast furnace slag, titanium disseminates in various mineral phases. Titanium could be concentrated mainly in perovskite, which could be selectively precipitated and grown by optimizing the operation factors like slag composition, temperature of heat treatment and additives. The titanium slag mineralography and the distribution in the as-received slag and the treated slag, as well as the methods of perovskite separation were studied. After treatment, the grain size is increased from 5 mu m to 200 mu m, the content of TiO2 in perovskite increases from 48% to 81%, the morphology changes from snow-shaped grain to coarse dendrites or equiaxed crystals. A concentrate is produced by gravity separation analyzing 35.25 % TiO2 with a recovery of 68.28% and a tailing analyzing 9.53 % TiO2. A concentrate analyzing 40. 08% TiO2 and a tailing analyzing 9.28% TiO2 can be obtained by flotation.