Impurity control by precipitation in synthetic atmospheric nickel laterite sulfate leach solutions
Access Status
Open access
Authors
Mbedzi, Ndishavhelafhi
Date
2020Supervisor
Laurence Dyer
Don Ibana
Type
Thesis
Award
PhD
Metadata
Show full item recordFaculty
Science and Engineering
School
WASM: Minerals, Energy and Chemical Engineering
Collection
Abstract
In light of fast depleting nickel sulfide ore reserves and increasing demand for nickel, the future of the nickel industry lies in the hydrometallurgical processing of the relatively abundant low-grade nickel laterite ores. The purification of the leach solutions, however, has proven difficult. Hydroxide and oxidative precipitation processes using a variety of reagents were developed for processing synthetic sulfate solutions simulating nickel laterite leach solutions and nickel and cobalt solutions following iron precipitation process.
Related items
Showing items related by title, author, creator and subject.
-
Wang, Kai (2012)Atmospheric leaching (AL) of low-grade nickel laterite ores can produce a pregnant leach solution (PLS) containing significant amounts of impurities such as trivalent iron, aluminium and chromium ions. Purification of PLS ...
-
Eksteen, Jacques; Olivier, M.; Dorfling, C. (2011)Crude NiSO4 solutions are often produced as a product of Sherrit-based matte leach processes leading to Fe and Co contaminated solutions of NiSO4. To upgrade the quality of these solutions for either the production of ...
-
Heckley, Philip Scott (2002)Approximately 70% of the western world's known nickel reserves are contained in laterite ores, but only 30% of the world's nickel production comes from these ores. This is due to the lack of economically viable technology ...