Journal
HYDROMETALLURGY
Volume 105, Issue 1-2, Pages 191-194Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2010.08.003
Keywords
Nickel laterite; Reduction roasting; Selective chlorination; Aluminum chloride
Categories
Funding
- National Natural Science Foundation of China [50774020]
Ask authors/readers for more resources
The selective chlorination of reduced limonitic laterite for the extraction of nickel and cobalt was investigated. Reduced ore samples were obtained from the reduction roasting of a limonitic laterite. The extraction of nickel and cobalt from the reduced ore was conducted by selective chlorination in the temperature range of 300-500 degrees C using aluminum chloride hexahydrate as the chlorination agent, and followed by water leaching at 80 degrees C. The reduced ore was partly chlorinated by hydrogen chloride generated from the thermal decomposition of AlCl(3 center dot)6H(2)O. Then the oxydrolysis of ferrous chloride re-generated hydrogen chloride which was used to further the chlorination. In this way, iron was mostly rejected as hematite, while nickel and cobalt were selectively chlorinated and dissolved during the water leaching process. Various parameters were studied including aluminum chloride addition, chlorination temperature, chlorination time, and the degree of reduction of ore. Under the optimum experimental conditions, 91%Ni, 90% Co and <4% Fe were extracted by water leaching. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available