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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

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