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The
smelting process comprises the carbonaceous reduction of ilmenite to
produce titania slag with a TiO2 content of 86%, and iron
with a carbon content of 2.5%.
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In
the Ti slag production process, the iron oxides are reduced to metallic
iron, thereby producing a TiO2-rich slag and high purity iron.
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Titanium slag is produced in the mining, refining and smelting of
mineral sands to produce titanium dioxide (TiO2) feedstocks used in the
production of pigments, titanium metal, welding fluxes and other
specialised products.
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TiO2
is produced from either ilmenite, rutile or titanium slag.
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Radioactive elements associated with heavy mineral deposits may be
removed from the ilmenite concentrate before smelting or, alternatively,
from the high-titanium slag after smelting.
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High-titania slag was prepared in a pilot-scale DC furnace from ilmenite
concentrates with different levels of
uranium and thorium.
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Titanium slag that is too fine for use in the chloride process.
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Titania slag, which comes from ilmenite, contains 85 per cent titanium
dioxide.
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The
ilmenite, as mined, has a high Cr2O3 content and is not suitable for
direct smelting to titania slag.
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Granulation of titania slag has been identified as a potential viable
alternative to the conventional block route.
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Both
wet and dry granulation of titania slag has been investigated.
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TiO2-rich slag is a suitable feed material for the chloride process if
the ilmenite feed material is low in alkaline earth impurities.
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The
thermodynamics of titania rich slags, an outline of the Multi-Phase
Equilibrium (MPE) package and its application to ilmenite smelting can
be provided.
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The
problem of copperas can be reduced by using titania slag as the feed
stock instead of ilmenite.
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