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| The study on preparation of Synthetic rutile by titania slag |
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Received:December 07, 2011
Revised:October 15, 2012
Accepted:December 19, 2011
Published Online:November 26, 2012
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| DOI： |
| KeyWord:Titania slag;Synthetic rutile;sodium hydroxide roast; acid leach |
| Author | Institution |
| Fan Yanqing |
Beijing General Research Institute of Mining and Metallurgy |
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| Abstract: |
| A sodium hydroxide roasting process for upgrading titania slag product of ilmenite to a high grade titanium dioxide (TiO2) is presented. The roasting process was carried out at moderate to high temperatures to yield a reaction product that would be easily decomposed by subsequent leaching procedures. Factors affecting the roasting process; namely sodium hydroxide the ratio to the slag material, the roasting time and temperature were studied. The optimised conditions used a NaOH to theory quantitative of aluminium and silicon contents in the slag ratio of 4.5 at a roasting temperature of 900 ?C for 1 h duration period. The impurities associated with the roasted slag were subjected to leaching with water at a pulp ratio (S/L) of 1:1for 1 h and 18% HCl solution at a leaching temperature 90?C and at a pulp ratio (S/L) of 4:1for 4 h leaving synthetic rutile (TiO2) as insoluble residue. Residue roasting was carried out at a temperature of 900 ?C for 1 h.This method is capable of producing high purity synthetic rutile assaying about 92% TiO2. |
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