Separating titania from treated slag by gravity separation or flotation

来源期刊：中国有色金属学报(英文版)2000年第4期

论文作者：马俊伟 隋智通 陈炳辰

文章页码：520 - 523

Key words：gravity; flotation; slags

Abstract: 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 5μm to 200μm, the content of TiO₂in 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.