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- W3204455901 abstract "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 °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 °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." @default.
- W3204455901 created "2021-10-11" @default.
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- W3204455901 date "2021-11-01" @default.
- W3204455901 modified "2023-09-28" @default.
- W3204455901 title "Recovery of niobium and titanium from ilmenorutile by NaOH roasting-H2SO4 leaching process" @default.
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- W3204455901 doi "https://doi.org/10.1016/j.jmrt.2021.09.091" @default.
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