A novel process for recovery of iron, titanium, and vanadium from titanomagnetite concentrates: NaOH molten salt roasting and water leaching processes
A novel process for recovery of iron, titanium, and vanadium from titanomagnetite concentrates: NaOH molten salt roasting and water leaching processes
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从钛磁铁矿精矿中回收铁、钛和钒的新工艺：NaOH熔盐焙烧和水浸工艺
DOI：
10.1016/j.jhazmat.2012.10.052
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发表时间：
2013-01-15
影响因子：
13.6
通讯作者：
Wang, Lina
中科院分区：
文献类型：
--
作者：
Chen, Desheng;Zhao, Longsheng;Wang, Lina
开发了一种从钛磁铁精矿中回收铁、钛、钒的新工艺。采用NaOH熔盐焙烧-水浸工艺处理富钛钒渣。在NaOH熔盐焙烧过程中，金属铁被氧化成含铁氧化物，MgTi 2 O 5转化为NaCl型结构的Na 2 TiO 3，M3 O 5（M = Ti，Mg，Fe）转化为α-NaFeO 2型结构的NaMO 2。在NaOH熔盐焙烧过程中，焙烧温度和碱渣质量比对富钛钒渣中钛的转化率有较大影响。在500 ℃下焙烧60 min，NaOH与渣的质量比为1：1，钛转化率为96.3%。在水浸过程中，Na+与H+交换，Na 2 TiO 3转化为未定义结构的H2 TiO 3，NaMO 2转化为α-NaFeO 2型结构的HMO 2。在最佳条件下，钠、硅、铝、锰、钒的浸出率分别为87.3%、42.3%、43.2%、22.8%、96.6%。皇冠版权所有（c）2012由爱思唯尔B. V.出版保留所有权利。
A novel process for recovering iron, titanium, and vanadium from titanomagnetite concentrates has been developed. In the present paper, the treatment of rich titanium-vanadium slag by NaOH molten salt roasting and water leaching processes is investigated. In the NaOH molten salt roasting process, the metallic iron is oxidized into ferriferous oxide, MgTi2O5 is converted to NaCl-type structure of Na2TiO3, and M3O5 (M = Ti, Mg, Fe) is converted to alpha-NaFeO2-type structure of NaMO2, respectively. Roasting temperature and NaOH-slag mass ratio played a considerable role in the conversion of titanium in the rich titanium-vanadium slag during the NaOH molten salt roasting process. Roasting at 500 degrees C for 60 min and a 1:1 NaOH-slag mass ratio produces 96.3% titanium conversion. In the water leaching process, the Na+ was exchanged with H+, Na2TiO3 is converted to undefined structure of H2TiO3, and NaMO2 is converted to alpha-NaFeO2-type structure of HMO2. Under the optimal conditions, 87.3% of the sodium, 42.3% of the silicon, 43.2% of the aluminum, 22.8% of the manganese, and 96.6% of the vanadium are leached out. Crown Copyright (c) 2012 Published by Elsevier B.V. All rights reserved.