HIGH PRESSURE SULPHURIC ACID LEACHING OF LATERITIC NICKEL ORE
2016. 12. 27. · lateritic nickel ore sample having 1.37% Ni, 0.076% Co and 47.72% Fe 2 O 3 were investigated. The leaching experiments showed that the increase of leaching temperature and leaching time increased continuously the amount of dissolved Ni and Co, and decreased continuously the amount of …
PDF Selective leaching of nickel from prereduced limonitic
High pressure acid leaching (HPAL) is the primary method for extraction of nickel from limonitic laterite. The severe operating conditions, the complexity of facilities, and several technical problems, such as scale formation, have always accompanied the HPAL, however.
Effect of activation pretreatment of limonitic laterite
The limonitic laterite ore used in this study was from the Philippines, as provided by Jiangsu Huahai Material Science and Technology Company Ltd. (China). A representative sample was obtained by coning and quartering. The sample was ground with a XZM-100 laboratory cylinder ball mill until the average size of the sample was < 74 μm.
A Thermodynamic Study of the Reduction of a Limonitic
The recovery of nickel from the oxidic nickeliferous laterite ores is receiving increasing attention due to the difficulty of recovering this metal from the sulphide ore deposits. One possible solution is to selectively reduce the nickel oxide in the ore, which could then be upgraded by, for example, magnetic concentration. In this article, a thermodynamic study was performed on the reduction ...
Kinetic Studies of the Reduction of Limonitic Nickel Ore by
Apr 21, 2020 · A sample of limonitic nickel ore was characterized by XRD, SEM-EDS, and ICP-OES techniques. The Rietveld refinement method showed that the main mineral constituent of this sample is goethite (55.8 pct). Thermal analysis experiments were performed and the determination of the goethite content in the sample could be confirmed by the mass loss associated to the dehydroxylation of this ...
Acid leaching of nickel from serpentinic laterite ores - Falconbridge Nickel
The nickel extraction from the serpentinic ore was 37% and 72%, respectively. Leach conditions and analytical results are shown in Table 6. EXAMPLE 6. The -48 mesh limonitic ore fraction of the lateritic ore of Example 5 was further ground and then leached by …
Atmospheric pressure leaching of nickel from a low-grade nickel- bearing ore
2018. 6. 27. · Keywords: nickel recovery, laterite ore, leaching, calcination, kinetics 1. Introduction Nickel is an important metal used for a wide variety of applications. The world’s various deposits of nickel are in the forms of sulfide and oxide (laterites) ores. Currently, the majority of nickel is obtained
PDF Study of the calcination process of two limonitic iron
changes undergone by the limonitic ore during a calcination process are of vital importance for the continuous improvement of the mineral beneficiation, and the metallurgical processes in both iron  and nickel industries . Many iron-ore producing countries have been forced to assess the feasibility of using hydrated oxides and
Recovery of nickel and cobalt as MHP from limonitic ore
May 15, 2018 · 1. A. D. Dalvi, W. G. Bacon and R. C. Osborne, “ Past and future of nickel laterite,” Proceedings of PDAC 2004, Trade Show& Investor Exchange (2004). Google Scholar; 2. A. Jones, “ Enhanced metal recovery from a modified C leach of mixed nickel-cobalt hydroxide,” PhD Thesis of Applied Chemistry and Mineral Science, MurdochUniversity, 20
Thermodynamics of the Reduction Roasting of Nickeliferous
of a limonitic ore by mixed reducing atmospheres of CO, CO 2, H 2, and/or H 2 O across a range of temperatures, and reported the effect of varying these conditions on the achieved nickel recoveries and grades in the ferronickel phase. Generally, ideal behavior of the condensed species was assumed. In all cases it was reported that the nickel grades