A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching has been carried out to provide a better understanding of the mineralogy, leaching process chemistry and effect of operating conditions on nickel recovery, residue properties and scaling.
separately in purified forms. This paper discusses the application of the CESL Nickel Process to laterites, limiting the discussion to the treatment of the impure nickel/cobalt solution after the pressure acid leach (PAL). 2 Background Cominco Engineering Services Ltd. (CESL) is a wholly – owned subsidiary of Cominco
PROCESS FOR RECOVERY OF NICKEL AND COBALT FROM LATERITE ORES USING ION EXCHANGE RESIN. FIELD OF THE INVENTION The present invention comprises an ion exchange process for recovery of nickel and cobalt present in leach effluents, in the form of pulp or solution, resulting from the various forms of leaching of nickel ores in general. More ...
The results of the phase one scoping tests have demonstrated that the Processing Partner's mixed chloride leach technology was effective in the recovery of value elements, namely Iron (Fe), Nickel (Ni), and Cobalt (Co) from the two laterite samples tested.
The processing of laterite ores for the recovery of nickel and cobalt has increased as the reserves of exploitable sulphide ores have become depleted. The pressure acid leach process (PAL) has become the preferred option for the treatment of laterite ores. Difficulties associated with the poor settling characteristics of the pulp in the counter
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Nov 02, 1999· A process for the recovery of nickel from a nickel containing ore in which the ore, particularly a laterite ore, is initially leached with an aqueous acid solution, after which the nickel is precipitated as nickel hydroxide by adding a hydroxide to the aqueous acid leach solution containing the nickel, followed by a re-leaching of the nickel with an aqueous ammoniacal solution and recovery of ...
Nickel laterite ores are becoming an increasingly important source of nickel and cobalt. BASF solvent extraction reagents are used in a nickel production plant, Queensland Nickel Inc. (QNI), to extract nickel from ammonia solutions. LIX® 87QN reagent was developed to fit into a QNI-developed nickel recovery process based on a modified Caron ...
The metal recovery ratios, as well as Ni, Fe, S and P content of ferronickel were considered. The results showed that a ferronickel containing 10.32 wt. % Ni was obtained from a laterite with 1.85 wt. % Ni, the nickel recovery ratio was about 99%.
Weathering is the most fundamental process in the formation of Ni-Co laterite deposits. Two phases of weathering can occur in Ni laterite deposits. Initially, the protolith of the Ni laterite may be weathered to serpentinite, which is subsequently weathered into a laterite profile concentrating Ni and Co.
Jan 27, 2016· "PROCESS FOR RECOVERY OF NICKEL AND COBALT FROM LATERITE ORES USING ION EXCHANGE RESIN", according to claim 1, characterized by the fact that a first step without losses of nickel to the precipitate generates a residue for discharge, while the second step generates losses of nickel to the precipitate, and for this reason, the solid phase is ...
emphasis on other projects, minimal nickel process development work at CESL occurred over the next five years. 3. STAGED CESL NICKEL PROCESS DEVELOPMENT Further development of the CESL Nickel Process, specifically the purification and recovery stages, was initiated beginning in 2006.
The present study deals with the nickel extraction and iron dissolution from nickeliferous laterite by a process of sulfation-roasting-leaching. To optimize the roasting process, response surface methodology (RSM) was utilized which employed two-level and two-factor full factorial central composite design (CCD).
Overall, the modelling of the electric furnace smelting of nickel laterite calcines has provided useful insights into the nature of the process, especially the way in which the Fe/Ni ratio of laterite and the target nickel grade of the ferronickel affect process performance.
Both hydrometallurgical and pyrometallurgical approaches are utilized to process nickel laterite ores, with the best approach depending on the ore composition. The Solvent Extraction – Electrowinning (SX-EW) process continues to grow in popularity.
DC laterite process . DC-arc furnace technology can be used to provide an economical process for the smelting of nickel-containing laterite ores and dust, to produce a crude ferronickel product that could be refined to saleable ferronickel by conventional techniques.
Nickel laterites are generally mined via open cut mining methods. Nickel is extracted from the ore by a variety of process routes. Hydrometallurgical processes include high-pressure acid leach (HPAL) and heap leach, both of which are generally followed by solvent extraction - electrowinning for recovery of nickel. Another hydrometallurgical ...
Development of the iron-focused laterite (ARFe) process C.A. Biley, M. Pelser, P. den Hoed, and M. Hove Anglo American Technical Solutions - Research Introduction Global nickel production has increased near-exponentially since the late 1800s, with a large majority of the total production originating from sulphide reserves.
Laterite revisited: mode of formation ABo. RASHID AHMAD & TEH GUAN HOE Department of Geology, University of Malaya, 50603 Kuala Lumpur, Malaysia Abstract: During 1800 laterite was perceived as a rock. This idea persisted until the first quarter of the twentieth century.
The processing of laterite ores for the recovery of nickel and cobalt has increased as the reserves of exploitable sulphide ores have become depleted. The pressure acid leach process (PAL) has become the preferred option for the treatment of laterite ores.ud ud Difficulties associated with the ...
The HPAL process also dissolves many other elements such as Cr, Mn, Ti, Zr, Th, U to name a few. The recovery process needs to conduct a massive upgrade of scandium whilst minimising the recovery of these elements in order to make 99% plus grade product. Another major cost issue to face with scandium bearing laterites is tailings disposal.
The processing of laterite ores for the recovery of nickel and cobalt has increased as the reserves of exploitable sulphide ores have become depleted. The pressure acid leach process (PAL) has become the preferred option for the treatment of laterite ores.
It is known that to extract nickel from nickel-bearing laterite ore is not an easy job. By reducing roast-magnetic separation, an effective result is achieved in this research in dealing with nickel-bearing laterite ore due to its simple technology process and the high nickel recovery.
Abstract. Alkali addition for iron precipitation, associated with sulfuric acid leaching of nickel laterites, has been considered periodically since the late 1960s, shortly after the development of the jarosite process for iron control in zinc refining.
recovery at which this increase is observed in practice. It is concluded that the model provides an accessible and a satisfactorily accurate vehicle for understanding the relationships between process variables and process outcomes during nickel laterite smelting. Keywords: Computational thermodynamics, Smelting, Laterites, Ferronickel ...