| 摘要 |
<p>A process is provided for handling waste solids produced from the chlorination of titanium-bearing ores in the presence of coke as a reducing agent, in particular waste metal chloride solids from a chloride process for making pigmentary titanium dioxide, which process comprises cooling the product stream from chlorination, separating the solids therein from the gaseous components of the product stream, combining the waste metal chloride solids and unreacted ore and coke solids with a liquid whereby waste metal chloride solids are dissolved in the liquid and unreacted ore and coke solids are slurried in the liquid, separating out unreacted ore and coke solids from the liquid including the dissolved waste metal chlorides, then after separating out unreacted ore and coke solids from the liquid, dividing the liquid including the dissolved waste metal chlorides into a recycle substream or portion and a bleed substream or portion, recycling the recycle substream or portion to comprise at least a part of the liquid which is combined with the waste metal chloride solids and unreacted ore and coke solids in the product stream, and neutralizing the bleed substream or portion to produce a filterable or directly landfillable mass of waste metal hydroxide solids.</p> |
