Mechanical strength and rewetting stability of nickel laterite pellets
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Xu, D, Liu, LX, Addai-Mensah, J and Robinson, D (2013) Mechanical strength and rewetting stability of nickel laterite pellets Advanced Powder Technology, 24 (4). pp. 743-749.
Full text not available from this repository.Abstract
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 and goethitic nickel laterite with controlled binder type (tap water and 44 wt.% H2SO4), binder content and pre-set porosity were made by a pellet press and subjected to mechanical strength and rewetting stability tests. The effect of fine/coarse particles ratio on the mechanical strength was also investigated using siliceous goethitic ore. The failure strength of the pellets under different drying conditions was measured and the time taken for the pellets to disintegrate under saturated (soaking) and leaching conditions was recorded. The results showed that, with the same type of nickel laterite, the time taken to disintegration during leaching test is proportional to the pellets tensile strength. Pellets with water as binder are more stable under soak conditions. Furthermore, failure strength for oven dried pellets is greater than that of air dried. With saprolitic nickel laterite (SAP) pellets, their mechanical strength and re-wetting stability can be enhanced by drying the wet pellets or by increasing the binder content in the pellets. The pellets mechanical strength was found to be a good indication of their stability under leaching conditions as well. However, no relationship between the two was observed for goethitic nickel laterite pellets.
| Item Type: | Article | |||||||||||||||
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| Subjects : | Chemical and Process Engineering | |||||||||||||||
| Divisions : | Surrey research (other units) | |||||||||||||||
| Authors : |
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| Date : | July 2013 | |||||||||||||||
| DOI : | 10.1016/j.apt.2013.03.014 | |||||||||||||||
| Copyright Disclaimer : | © 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved. | |||||||||||||||
| Uncontrolled Keywords : | Nickel laterite pellets, Pellet strength, Rewetting | |||||||||||||||
| Depositing User : | Symplectic Elements | |||||||||||||||
| Date Deposited : | 17 May 2017 13:55 | |||||||||||||||
| Last Modified : | 25 Jan 2020 00:30 | |||||||||||||||
| URI: | http://epubs.surrey.ac.uk/id/eprint/840830 |
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