Physicochemical factors affecting leaching of laterite ore in hydrochloric acid

The effect of physicochemical factors on laterite ore leaching in hydrochloric acid was investigated in this study. The results showed that the valuable metals such as nickel and cobalt could be extracted effectively at the leaching conditions as follows: acid concentration was 8mol/L, the particle...

Full description

Saved in:
Bibliographic Details
Published in:Hydrometallurgy 2012-11, Vol.129-130, p.14-18
Main Authors: Li, Jinhui, Xiong, Daoling, Chen, Hao, Wang, Ruixiang, Liang, Yong
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Hydrochloride acid
Hydrometallurgy
Laterite
Metals. Metallurgy
Mineral dissolution
Nickel
Production of metals
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of physicochemical factors on laterite ore leaching in hydrochloric acid was investigated in this study. The results showed that the valuable metals such as nickel and cobalt could be extracted effectively at the leaching conditions as follows: acid concentration was 8mol/L, the particle size of samples were 100% passing 0.15mm, the stirring speed was 300rpm, leaching temperature was 353K, S/L ratio was 1:4 and leaching duration was 2h. The extraction of nickel and iron presented a linear correlation, which demonstrated nickel associated in iron ore, and cobalt dissolution was not consistent with iron dissolution which indicated that the distribution of cobalt were not uniform in the iron oxide crystals and existed in other minerals, and this result had also been demonstrated by mineralogical studies. To investigate the stability of different minerals in the leaching condition listed above as well as the influence of nickel and cobalt on their dissolution in such condition, the minerals dissolution order was studied by X-ray diffraction (XRD) according to determination of the leaching residues and chemical composition of the leaching solution, and the result order was goethite>lizardite>magnetite>hematite. ► The leaching conditions in hydrochloric acid were investigated in this study. ► Nickel and cobalt were extracted mostly while iron extraction was suppressed. ► The stability of minerals and the influence of metal dissolution were investigated. ► The minerals dissolution order was studied through XRD determination and analysis. ► The dissolution mechanism was discussed in this paper.
ISSN:0304-386X
1879-1158
DOI:10.1016/j.hydromet.2012.08.001