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Titania From Intermediates Prepared by Soda-Smelting Ilmenite.


PB295061

Publication Date 1979
Personal Author Raddatz, A. E.; O'Keefe, D. A.; Gomes, J. M.; Wong, M. M.
Page Count 14
Abstract The Federal Bureau of Mines, as part of its goal to minimize undesirable environmental impacts associated with mineral processing, has investigated a soda-smelting technique for processing ilmenite into pig iron and a titanium slag that is suitable for a feed to a sulfate-process titania pigment plant. By this procedure, the generation of ferrous sulfate waste and its associated disposal problem is obviated. Molten titania slag was quenched, water leached, and filtered to yield a sodium titanate intermediate product containing about 70 wt-pct TiO2, 1 wt-pct Fe, and 20 wt-pct Na2O. This intermediate product, high-soda titanate (HST), was mixed with H2SO4, calcined, quenched, and water leached to produce a low-soda titanate (LST) product that contained only 2 wt-pct Na2O. Both the HST and LST were evaluated as feed materials for preparing titania by the sulfate process. About 95 pct of the solubilized TiO2 was subsequently recovered from the titanyl sulfate solutions by hydrolysis. Barren solutions from hydrolysis, containing about 26-wt-pct H2SO4, were upgraded by vacuum-thermal evaporation or electrodialysis. The regenerated acid solutions were used to digest additional HST and LST.
Keywords
  • Ilmenite
  • Smelting
  • Pig iron
  • Titanium oxides
  • Slags
  • Titanium
  • Leaching
  • Hydrolysis
  • Electrodialysis
  • Evaporation
  • Process charting
  • Design criteria
  • Performance evaluation
  • Solid waste disposal
  • Iron sulfate
  • Mineral processing
  • Chemical reaction mechanisms
  • Procedures
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 71N - Nonferrous Metals & Alloys
  • 48A - Mineral Industries
Corporate Authors Bureau of Mines, Reno. NV. Reno Metallurgy Research Center.
Document Type Technical Report
Title Note Rept. of investigations 1979.
NTIS Issue Number 197917
Titania From Intermediates Prepared by Soda-Smelting Ilmenite.
Titania From Intermediates Prepared by Soda-Smelting Ilmenite.
PB295061

  • Ilmenite
  • Smelting
  • Pig iron
  • Titanium oxides
  • Slags
  • Titanium
  • Leaching
  • Hydrolysis
  • Electrodialysis
  • Evaporation
  • Process charting
  • Design criteria
  • Performance evaluation
  • Solid waste disposal
  • Iron sulfate
  • Mineral processing
  • Chemical reaction mechanisms
  • Procedures
  • Bureau of Mines
  • 71N - Nonferrous Metals & Alloys
  • 48A - Mineral Industries
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