Optimisation of nickel extraction from laterite ores by high pressure acid leaching with addition of sodium sulphate

被引：35

作者：

Johnson, JA ^{[1
]}

Cashmore, BC ^{[1
]}

Hockridge, RJ ^{[1
]}

机构：

[1] CSIRO MInerals, AJ Parker CRC Hydromet, Bentley, WA 6982, Australia

来源：

MINERALS ENGINEERING | 2005年 / 18卷 / 13-14期

关键词：

hydrometallurgy; leaching; reaction kinetics;

D O I：

10.1016/j.mineng.2005.05.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Extraction of nickel from Western Australian laterite ores via sulphuric acid leaching at 250 degrees C has been optimised by the addition of sodium sulphate. Leaching of a nontronitic nickel laterite ore in fresh water, with a sulphuric acid loading of 420 kg/t ore extracted 93% of nickel from the ore. When limonitic nickel laterite ore was leached in fresh water with an acid loading of 3 10 kg/t ore, 92% of the total nickel was extracted. The nickel extractions were optimised at 96% for the nontronitic ore and 95% for the limonitic ore, at the above acid loadings, when process water sodium ion levels were increased to 4 g/L and 2 g/L, respectively. Further addition of sodium ion resulted in a gradual decrease in overall nickel extraction, as the leach liquor free acidity decreased. At higher acid loadings, the process water sodium ion levels required for optimum extraction were also higher, so as to prevent dissolution of aluminium. Crown Copyright (c) 2005 Published by Elsevier Ltd. All rights reserved.

引用

页码：1297 / 1303

页数：7

共 19 条

[1]

Adams M, 2004, INTERNATIONAL LATERITE NICKEL SYMPOSIUM-2004, P193

[2]

BUARZAIGA M, 2004, PRESSURE HJYDROMETAL, P181

[3]

HAZEN N, 1997, ALTA 1997 NICKEL COB

[4]

Johnson J.A., 2002, CHLORIDE METALLURGY, P339

[5]

Johnson J.A., 2004, PRESSURE HYDROMETALL, P199

[6] Pressure acid leaching of arid-region nickel laterite ore Part IV: Effect of acid loading and additives with nontronite ores [J].

Johnson, JA ;

McDonald, RG ;

Muir, DM ;

Tranne, JP .

HYDROMETALLURGY, 2005, 78 (3-4) :264-270

[7]

Krause E., 1998, ALTA 1998 NICKEL COB

[8]

KRAUSE E, 1997, P NICK COB 97 INT S, P441

[9]

KYLE JH, 1999, AUSTR MIN FDN C WAT

[10]

KYLE JH, 2003, ALTA 2003 NICK COB P

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