Mechanical strength of nickel laterite pellets and their stability under soaking and leaching conditions

Xu, D., Liu, L. X., Addai-Mensah, J. and Robinson, D. J. (2012). Mechanical strength of nickel laterite pellets and their stability under soaking and leaching conditions. In: Chemeca 2012 : quality of life through chemical engineering. Australasian Chemical Engineering Conference (CHEMECA 2012), Wellington, New Zealand, (). 23-26 September 2012.

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Name Description MIMEType Size Downloads
Author Xu, D.
Liu, L. X.
Addai-Mensah, J.
Robinson, D. J.
Title of paper Mechanical strength of nickel laterite pellets and their stability under soaking and leaching conditions
Conference name Australasian Chemical Engineering Conference (CHEMECA 2012)
Conference location Wellington, New Zealand
Conference dates 23-26 September 2012
Proceedings title Chemeca 2012 : quality of life through chemical engineering
Place of Publication Barton, ACT, Australia
Publisher Engineers Australia
Publication Year 2012
Sub-type Fully published paper
ISBN 9781922107596
Total pages 10
Collection year 2013
Language eng
Abstract/Summary The stability of agglomerated/pelletized ores is one of the key properties for successful heap leaching of complex, low-grade nickel laterite minerals. In this paper, single pellets of saprolitic nickel laterite with controlled binder type (tap water and 44 wt.% H2SO4), binder content and porosity were made by a pellet press and subjected to stability, mechanical strength and leaching tests. The failure strength of the pellets under different drying conditions was measured and the times taken for the pellets to disintegrate under saturated (soaking) and leaching conditions recorded. The results showed that the time taken to disintegration during leaching test is proportional to the pellet tensile strength. Pellets with water as binder are more stable under soak tests. Furthermore, failure strength for oven dried pellets is greater than that of air dried. The mechanical strength was found to be a good indication of the stability of single pellet during the saprolitic nickel laterite leaching process.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Wed, 27 Mar 2013, 10:09:35 EST by Dr Lian Liu on behalf of Julius Kruttschnitt Mineral Research Centre