Effective Extraction of Titanium and Iron from Coarse Anatase Concentrate

• Published in: JOM (1989) Vol. 74; no. 10; pp. 3833 - 3842
• Main Authors: Xiao, Junhui, Zou, Kai, Gao, Deqiang, Zhong, Nanlan, Xiong, Wenliang, Li, Chengxiu, Huang, Wenxiao, Liang, Guangjie
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2022; Springer Nature B.V
• Subjects: Aluminum oxide; Anatase; Chemistry/Food Science; Earth Sciences; Engineering; Environment; Hematite; Iron; Kaolinite; Leaching; Magnetic fields; Magnetic separation; Magnetite; Mineral reserves; Minerals; Particle size; Physics; Quartz; Recovery; Silicon dioxide; Sodium; Sodium salts; Sodium silicates; Technical Article; Temperature; Titanium; Titanium dioxide; Beijing China; China; Germany
• ISSN: 1047-4838; 1543-1851
• DOI: 10.1007/s11837-022-05421-x

In this study, we investigated coarse anatase concentrate composed of 35.63% TiO 2 , 15.22% Fe 2 O 3 , 10.68% Al 2 O 3 , and 13.18% SiO 2 , containing mainly anatase, kaolinite, hematite, and quartz. The concentrate was treated via roasting, water leaching, and magnetic separation. The addition of NaOH promoted the transformation of kaolinite and quartz into a soluble sodium salt rich in sodium meta-aluminate and sodium silicate. Furthermore, the addition of coke promoted the transformation of hematite to magnetite, metallic Fe, and ferrous oxide. Fe concentrates with an Fe content and recovery of 69.99% and 92.77%, respectively, and TiO 2 concentrates with a TiO 2 content and recovery of 94.90% and 99.45%, respectively, were achieved. The major minerals in the Fe concentrate were magnetite, metallic Fe, and ferrous oxide, and the Ti in the Ti concentrate originated from anatase TiO 2 . The thermodynamic calculation results were in good agreement with the test results.