Effect of nickel laterite pellet properties on its strength and leaching performance
Files
(Published version)
Date
2011
Authors
Liu, L.X.
Zhou, L.
Addai Mensah, J.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Chemeca 2011: Engineering a better world, 2011, iss.130, pp.1-11
Statement of Responsibility
Conference Name
Chemeca 2011 (18 Sep 2011 - 21 Sep 2011 : Sydney, Australia)
Abstract
In this work, nickel laterite pellets with controlled mass, porosity and binder (sulphuric solution and water) were made by using a pellet press and either tap water or 44 w/w % H2SO 4 as a binder. The pellets were then either oven-dried or ambient-dried for a certain time and its mechanical strength were measured. Leaching tests were also conducted on single pellet with irrigation of sulphuric acid solution from the top of the pellet and the leached out solution were collected and Ni recoveries were analysed. The time taken for the pellets to disintegrate during leaching was recorded. It was observed that the mechanical strength of the pellet is directly related to its dryness, with completely dried pellets having much higher strength. The dry pellet strength depended upon by the binder content and porosity. The time taken for the pellets to disintegrate during leaching increased with increasing mechanical strength. In comparison with sulphuric solution-bound pellets at the same condition, with water-bound pellets exhibit higher mechanical strength. Although the Ni leaching rate for water-bound air-dried pellets was low at the beginning, the process continued for more than 200 h without disintegration, with 70% of Ni recovered.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright 2011 CAUTHE