Leaching of ilmenite ores by acidic chloride solutions

被引：35
作者：
Das, G. K. [1 ]
Pranolo, Y. [1 ]
Zhu, Z. [1 ]
Cheng, C. Y. [1 ]
机构：
[1] CSIRO Proc Sci & Engn, CSIRO Minerals Natl Res Flagship, Karawara, WA 6152, Australia
来源：
HYDROMETALLURGY | 2013年 / 133卷
关键词：
Ilmenite ore; Chloride leaching; Titanium extraction; PSEUDORUTILE;
D O I：
10.1016/j.hydromet.2012.12.006
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The direct leaching of Australian ilmenite ore samples with HCl was found to be much more effective with high chloride (Cl-) concentration (similar to 500 g/L) in the feed solution. The presence of CaCl2 was more effective for leaching than that of MgCl2 and NaCl due to its higher solubility. The effects of pulp density, retention time, HCl concentration, CaCl2 concentration and temperature were examined to optimise the leaching conditions. The optimum conditions for leaching ilmenite in this study were found to be 5-7.5 M HCl solution with a total Cl- concentration of similar to 500 g/L, 3.3% (w/w) pulp density, 70-80 degrees C and 4-6 h of retention time. Under these conditions, the optimum leaching efficiencies were similar to 98-99% Ti and 96% Fe for ilmenite ore A and 94% Ti and 93% Fe for ilmenite ore B. One of the advantages of the HCl-CaCl2 direct leach process is that the HCl-CaCl2 solution can be recycled back to leaching after Ti recovery. The leach residue containing mainly unleached rutile and pseudorutile can be used as a feed for synthetic rutile production. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
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收藏
页码：94 / 99
页数：6
相关论文
共 21 条
[1]  
Duyvesteyn W., 2001, WO Patent, Patent No. [2001/00531 A1, 200100531]
[2]  
Duyvesteyn W., 2002, US Patent, Patent No. [2002, 6375923 B1, 20026375923]
[3]   THE REACTION BETWEEN REDUCED ILMENITE AND OXYGEN IN AMMONIUM-CHLORIDE SOLUTIONS [J].
FARROW, JB ;
RITCHIE, IM ;
MANGANO, P .
HYDROMETALLURGY, 1987, 18 (01) :21-38
[4]  
Gambogi J, 2011, TITANIUM MINERAL CON, P174
[5]   MINERALOGICAL NOMENCLATURE - PSEUDORUTILE REVALIDATED AND NEOTYPE GIVEN [J].
GREY, IE ;
WATTS, JA ;
BAYLISS, P .
MINERALOGICAL MAGAZINE, 1994, 58 (393) :597-600
[6]  
GREY IE, 1975, AM MINERAL, V60, P898
[7]  
Lakshmanan V., 2004, 17 IND MIN INT C, P92
[8]  
Lakshmanan V.I., 2005, US patent, Patent No. [2005/0142051 A1, 20050142051]
[9]  
Lakshmanan V.I., 2011, CHLOR S EPD C 2011, P425
[10]  
Lakshmanan V. I., 2004, US Patent, Patent No. [2004, 6699446-B2, 20046699446]
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