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Furnace smelting and extractive metallurgy of red mud: Recovery of TiO2, Al2O3 and pig iron

✍ Scribed by Erol Erçağ; Reşat Apak

Book ID
101262451
Publisher
Wiley (John Wiley & Sons)
Year
1997
Tongue
English
Weight
379 KB
Volume
70
Category
Article
ISSN
0268-2575

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✦ Synopsis

Turkish red mud (bauxite waste) has been mixed with dolomite and coke, pelletized and sintered at 1100¡C, and ünally smelted at 1550¡C to produce pig iron and a slag. The slag was leached with 30% at 90¡C. The leachate H 2 SO 4 was diluted, ferric iron was reduced with and extracted with 5% D2EHPA SO 2 , solution in kerosene. Silica and were recovered from the remaining Al 2

O 3 aqueous solution, while the organic extract was stripped with 10% Na 2 CO 3 solution, ünally hydrolysed and calcined to produce pigment-grade The TiO 2 . titanium recovery efficiency on the basis of slag weight was 84•7%. The extractive separation of titanium from both valencies of iron was investigated as a function of pH and time. A stoichiometric ýowsheet for the whole process has been developed.

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