Sulfate digestion process for high purity TiO<sub>2</sub> from titania slag

doi:10.1007/s11705-009-0005-z

Front Chem Eng Chin

2009, Vol. 3

Issue (2) : 155-160 https://doi.org/10.1007/s11705-009-0005-z

RESEARCH ARTICLE

Sulfate digestion process for high purity TiO₂ from titania slag

T. A. LASHEEN(

)

Researches Sector, Nuclear Materials Authority, P. O. Box 530 El Maadi, Cairo, Egypt

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Abstract

A titania slag product of Rosetta ilmenite assaying 72% TiO₂ is treated by the sulfate process option of the pigmentary TiO₂ manufacture. The relevant factors of acid concentration, particle size, slag/acid ratio besides the reaction temperature, and time have been studied. After dissolving the cured mass in dilute acid and clarification, the obtained solution was subjected to hydrolysis of its titanium content. The final product was bleached under reducing conditions to redissolve the residual coloring impurities before being dewatered and calcinated. The obtained results indicated that a leaching efficiency of about 92% was realized due to the presence of some refractory components in the working slag material, namely, rutile and magnesium iron titanate. The obtained white pigment assay attained up to 99.85% TiO₂, while the analyzed impurities involve 77 ppm Mn and only 14 and 7 ppm of total iron and V, respectively.

Keywords titania slag sulfate process pigment

Corresponding Author(s): LASHEEN T. A.,Email:lasheen_ta@yahoo.com

Issue Date: 05 June 2009

Cite this article:

T. A. LASHEEN. Sulfate digestion process for high purity TiO₂ from titania slag[J]. Front Chem Eng Chin, 2009, 3(2): 155-160.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-009-0005-z
https://academic.hep.com.cn/fcse/EN/Y2009/V3/I2/155

Fig.1 X-ray diffraction pattern of sample slag
M-magnesium iron titanate, P- pseudobrookite, R-rutile, I-metallic iron, Q-quartz

Tab.1 Chemical analysis of the working titania slag

Fig.2 Effect of acid concentration on the dissolution efficiency of the working slag

Fig.3 Effect of particle mesh size on the dissolution efficiency of the working slag

Fig.4 Effect of slag/acid ratio on the dissolution efficiency of the working slag

Fig.5 Effect of temperature on the dissolution efficiency of the working slag

Tab.2 Effect of temperature on the solidification time of the reacting slag/acid slurry

Fig.6 X-ray diffraction pattern of unreacted slag sample
M-magnesium iron titanate, R-rutile, Q-quartz

Fig.7 X-ray diffraction pattern of ignited product at 600°C (Anatase) and at 900°C (Rutile)
A-Anatase, R-Rutile

Tab.3 Chemical composition of the ignited TiO product before and after bleaching (wt-%)

1	Harben P W. The Industrial Minerals HandyBook, 3rd Edition, London, UK. 1999, 216-223
2	Becher R G, Canning R G, Goodheart B A, Uusna S. A new process for upgrading ilmenite minerals sands. Proc. Australas. Inst. Min. Metall . 1965, 21: 1261-1283
3	Chen James H, Tex C C. US Patent, 3825419, 1974
4	Schoukens A F S, Morris D J, Stephen MC. US Patent, 6733561 B2, 2004
5	Sahu K K, Alex T C, Mishra D, Agrawal A. An overview on the production of pigment grade titania from titania-rich slag. Waste Manage Res , 2006, 24: 74-79 doi: 10.1177/0734242X06061016
6	Mackey T S. Upgrading ilmenite into a high-grade synthetic rutile. Journal of Metals , 1994, April: 59-64
7	Gueguin M. US Patent, 4078039, 1978
8	Gueguin M. US Patent, 4933153, 1990
9	Gueguin M. US Patent, 5063032, 1991
10	Gueguin M. US Patent, 5389355, 1995
11	Elger G W, Kirby D E. US Patent, 3996332, 1976
12	Jarish B. US Patent, 4038363, 1977
13	Van Dyk J P, Vegter N M, Visser C P, De lange T, Winter J D, Walpole E A, Nell J. US Patent, 6803024 B1, 2004
14	Borowiec K, Grau A E, Gueguin M, Turgeon J F. US Patent, 5830420, 1998
15	Elger G W, Holmes R A. US Patent, 4362557, 1982
16	Borowiec K. Sulphidization of solid titania slag. Scandinavian journal of metallurgy , 1991, 20: 198-204
17	Liang B, Li C, Zhang C, Zhang Y. Leaching kinetics of Panzhihua ilmenite in sulfuric acid. Hydrometallurgy , 2005, 76: 173-179 doi: 10.1016/j.hydromet.2004.10.006
18	Han K N, Rubcumintara T, Fuerstenau M C. Leaching behavior of ilmenite with sulfuric acid. Metall Trans, B, Process Metall , 1986, 18B: 325-330
19	Sinha H N. Solubility of titanium minerals. In: Preprints-International Conference on “Advances in Chemical Metallurgy” Bhabha Atomic Research Center. Bombay, India , 1979, 2: paper 35
20	Johnsson M, Pettersson P, Nygren M. Thermal decomposition of fibrous TiOSO₄·2H₂O to TiO₂. Thermochimica Acta . 1997, 298: 47-54 doi: 10.1016/S0040-6031(97)00206-2

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