期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 15, 期 -, 页码 2575-2583出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2021.09.091
关键词
Niobium; Titanium; Ilmenorutile; Extraction
资金
- Key Research Program of Frontier Sciences of Chinese Academy of Sciences [QYZDJ-SSW-JSC021]
- National Natural Science Foundation of China [51804289]
- Opening Foundation of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization [CNMRCUKF1901]
- Special Project for Transformation of Major Technological Achievements in Hebei Province [19044012Z]
- Province Key R&D Program of Hebei [20374105D]
- National Key R&D Program of China [2018YFC1900500, 2018YFE0123100]
Niobium has a wide range of applications in various industries. A novel process was proposed to efficiently extract niobium, titanium, and iron from ilmenorutile. The optimized reaction parameters include roasting temperature of 550 degrees C, NaOH-to-ilmenorutile molar ratio of 2.6, and leaching temperature of 90 degrees C.
Niobium has a wide range of application in various industries such as materials, alloy, and electronic industry. To improve the use of ilmenorutile in China's Bayan Obo deposit, a novel process of extracting niobium, titanium, and iron from ilmenorutile by NaOH roasting-H2SO4 leaching process (NRHLP) was proposed. The influences of roasting and leaching temperature, roasting and leaching time, molar ratio of NaOH-to-ilmenorutile, leaching mass ratio of liquid-to-solid, and the H2SO4 concentration on the extraction of niobium were systematically investigated. The results demonstrate that this process is efficient. The optimized reaction parameters were as follows: roasting temperature, 550 degrees C; molar ratio of NaOH-to-ilmenorutile, 2.6; roasting time, 120 min; leaching mass ratio of liquid-to-solid, 4.0; leaching temperature, 90 degrees C; the H2SO4 concentration, 60 wt.%; leaching time, 2 h. Under these optimum circumstances, the maximum niobium and titanium recovery can reach 96.68%. In addition, a new phase containing niobium and titanium is confirmed and proved. (C) 2021 The Author(s). Published by Elsevier B.V.
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