In the blast furnace slag, titanium disseminated in various mineral phases. Titanium could be concentrated mainly in perovskite, which could be selectively precipitated and grown by optimizing the operation factors like the slag composition, temperature of heat treatment and additive agents. This study aims at establishing the titanium slag mineralogy and its distribution in the treated slag and the as-received slag, as well as the methods of perovskite separation. After heat treatment, the grain size was grown from 5 approx 20#mu#m to 80 approx 200#mu#m, the distribution of TiO_2 in perovskite was increased from 48 percent to 81 percent, the morphology was changed from snow-shaped grain to coarsening dendrites or equiaxed crystals. A concentrate were produced by gravity separation analyzing 35.25 percent TiO_2 with a recovery of 68.28 percent and a tailing analyzing 9.53 percent TiO_2 , and a possibility of flotation upgrading was discussed.
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