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Removal of iron from ilmenite by KOH leaching-oxalate leaching method
Wang Yuanbo1,2; Qi Tao1; Chu Jinglong1; Zhao Wei1; Qi, T
Source PublicationRARE METALS
AbstractOxalic acid was used for the removal of iron from the intermediates of ilmenite leached by KOH liquor. Various parameters, such as pH, temperature, initial oxalate concentration, and illumination were investigated. Meanwhile, it was found that orthorhombic crystal Ti(2)O(2)(OH)(2)(C(2)O(4))center dot H(2)O formed as the leaching proceeded. Scanning electronic microscope (SEM) images implied that the formation of Ti(2)O(2)(OH)(2)(C(2)O(4))center dot H(2)O with good crystallinity proceeded through three stages. Calcining Ti(2)O(2)(OH)(2)(C(2)O(4))center dot H(2)O, anatase (350 degrees C) or rutile (550 degrees C) type TiO(2) was obtained, respectively. Element analysis found that the calcined product contained 94.9% TiO(2) and 2.5% iron oxide, but only about 1600 ppm dissolvable iron oxide was left, which indicates that oxalic acid was comparatively effective on iron oxide removal from the intermediates. Finally, an improved route was proposed for the upgrading of ilmenite into rutile.
KeywordIlmenite Iron Removal Titanium Oxide Oxalate Potassium Hydroxide Koh Leaching
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000273685700002
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Document Type期刊论文
Corresponding AuthorQi, T
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Wang Yuanbo,Qi Tao,Chu Jinglong,et al. Removal of iron from ilmenite by KOH leaching-oxalate leaching method[J]. RARE METALS,2010,29(1):9-15.
APA Wang Yuanbo,Qi Tao,Chu Jinglong,Zhao Wei,&Qi, T.(2010).Removal of iron from ilmenite by KOH leaching-oxalate leaching method.RARE METALS,29(1),9-15.
MLA Wang Yuanbo,et al."Removal of iron from ilmenite by KOH leaching-oxalate leaching method".RARE METALS 29.1(2010):9-15.
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