An Investigation on the Effects of Surface Activation and Acidic Pretreatment on Ilmenite Recovery

Document Type : Research Note


Department of Mining Engineering, Shahid Bahonar University of Kerman, Kerman, I.R. IRAN


Application of flotation in ilmenite fine particles recovery was not proved promising in previous studies, due to very limited active sites on ilmenite which is responsible for poor flotability of the mineral. In this work, surface activation and acidic pretreatment were examined to improve ilmenite floatability. Experiments were conducted on samples collected from the feed to line 3, containing 6.36% TiO2. The samples were ground to minus 106µm. Taguchi method was used to design experiments leading to optimal operational conditions, which found to be 700 g/t Clarient Flotinor SM 15 and Flotinor FS mixture with ratio 1/1 as collectors, 15 minutes as conditioning time and pH at 8.5. It is shown that using Pb(NO3)2 as surface activation with dosages up to 150 g/t, resulted in about 50% increase in recovery with a corresponding 9% increase in separation efficiency. Additionally, the concentrate grade was increased about 14% by using acidic pretreatment before conditioning.


Main Subjects

[1] Bulatovic S., Wyslouzil D.A., Process Development for Treatment of Complex Peroviskite, Ilmenite and Rutile Ores, Mineral Engineering, 12(12), p. 1407 (1999).
[2] Mahmoud M.H.H., Afifi A.A.I., Ibrahim I.A., Reductive Leaching of Ilmenite Ore in Hydrochloric Acid for Preparation of Synthetic Rutile, Hydrometallurgy, 73, p. 99 (2004).
[3] El-Hazek N., Lasheen T.A., El-Sheikh R., Salah A., Hydrometallurgical Criteria for TiO2 leaching from Rosettailmenite by Hydrochloric Acid, Hydrometallurgy, 87, p. 45 (2007).
[4] Poletti C., Balog M., Schubert T., Liedtke V., Edtmaier C., Production of Titanium Matrix Composites Reinforced with SiC Particles, Composites Science and Technology, 68, p. 2171 (2008).
[5] کره­ای، محمدتقی؛ "شرح مختصر کارخانه های فرآوری- کارخانه فرآوری تیتانیوم کهنوج"؛ سازمان زمین شناسی و اکتشافات کشور، بانک داده های فرآوری مواد معدنی ایران؛ (83- 1382).
[6] امینی راد، حسن؛ جباری برجسته، حامد؛ رشتچیان، داود؛ جوهرزدایی از کاغذهای باطله به روش شناورسازی، نشریه شیمی و مهندسی شیمی ایران، (2) 26، ص 1 (1386).
[7] Fan X., Rowson N.A., The Effect of Pb(NO3)2 on Ilmenit Flotation, Mineral Engineering, 13(2), p.205 (2000).
[8] Eigeles M.A., Mashyanova A. V., “Flotation of Silicates and Oxides (Study on Interaction of Reagents with Ilmenite and Chlorite by Means of Electrokinetic and Radiometric Methods)”, Publ. Moscow, p.88-105; (1961).
[9] Zhung K., Cui L., Influence of Fe2+ Ions of Ilmenit on its Flotability, Int. J. Minerals Processing, 20, p. 253 (1987).
[10] Gutierrez C., Influence of Previous Aeration in Water or air of Ilmenite on its Flotation with Oleic Acid, Int. J. Miner. Process., 3(3), p. 247 (1976).
[11] Luszczkiewicz A., Lekki J., Laskowski J., The Flotability of Ilmenite, "13th Int. Miner. Process. Congr., Treatment of Iron-Titanium Ores Round Table Seminar", p. 164-182; (1979).
[12] شرکت مهندسین پولاد؛ "طرح احداث واحد آزمایشی تولید کنسانتره ایلمینیت کهنوج"؛ طرح تیتانیوم کهنوج؛ جلد اول؛ (1374).
[13] TOT-Report, “Investigation Program to Determine the Possibility of Recleaning the Refuses from the Ilmenite Processing Plant Kahnooj”, Kahnooj Titanium Project; (Sep 2004).