Nickel and cobalt losses from laterite ore after the ...

2020-11-1 · The application of the sulfation-roasting-leaching process for nickel and cobalt extraction from a laterite ore is promising. The obtained results showed that 80.6, 93.3, 74.4, and 5.5 (wt.%) of nickel, cobalt, magnesium, and iron, respectively, can be …

Nickel and cobalt losses from laterite ore after ...

In this work, a sample of nickel laterite ore from the northern region of Brazil was processed by the sulfation-roasting-leaching route. The samples after each step of the process were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), and …

Extraction of molybdenum and nickel from roasted Ni–Mo …

2017-1-1 · Trans. Nonferrous Met. Soc. China 27(2017) 220âˆ''226 Extraction of molybdenum and nickel from roasted Niâˆ''Mo ore by hydrochloric acid leaching, sulphation roasting and water leaching Peng-fei XIAN, Sheng-fan ZHOU, Ming-yu WANG, Xue-wen WANG, Bian-fang CHEN School of Metallurgy and Environment, Central South University, Changsha 410083, China Received 17 November 2015; …

Selective leaching of nickel from prereduced limonitic ...

2016-10-31 · ore pretreatment step by reductive roasting to enable ammoniacal leaching of nickel in the subsequent stage. Since then, it was not until 1990s, and beyond, when the new HPAL plants were built that are currently in operation in Australia, Philippines, New Caledonia, Papua New Guinea and Turkey [2]. All these HPAL plants, regardless of their ...

Roasting and Leaching Behavior of Nickel Laterite Ore ...

2021-3-29 · Abstract Nickel is mostly extracted from sulfide ores, however, laterite ores account for over 60 pct of all nickel resources in the world, and despite its predominance, there is no well-established process to extract nickel from such ores. Nickel in laterites is hosted in many different compounds such as oxides, hydroxides, and silicates minerals. The sulfation-roasting-leaching process has ...

Extraction of valuable metals from low-grade nickel matte …

2021-5-4 · In this paper, an improved process that uses chlorination roasting followed by water leaching to treat low-grade nickel matte, an intermediate product derived from flotation and high-temperature smelting of ore, is innovatively put forward.

INTERNATINA SIENTII JRNA MAINES. TENGIES. …

Ore L ow-grade nickel laterite ore from Ržanovo mining area in R. Macedonia was subject of leaching. It belongs to intermediate type Saprolitic ores (class C), with increased content of MgO (12–16 %, wt.) and Fe in the range of 25–33 %, wt.. Mechanical preparation of the ore with Ni content of 0.85 %,wt., was performed within the

Recovery of valuable metals from a low-grade nickel ore ...

2012-4-30 · Metal leaching from a low-grade nickel ore was investigated using an ammonium sulfate roasting-water leaching process. The nickel ore was mixed with ammonium sulfate, followed by roasting and finally leaching with water. During the process the effects of the amount of ammonium sulfate, roasting temperature, and roasting time on the leaching recovery of metal elements were analyzed. …

Metalcess-works for metal cycle from ore extraction to ...

Flash Magnetization Roasting technology can be used to recover superfine low-magnetism iron residue/slag, especially those from zinc PLS purification and nickel laterite leaching, to standard iron ore.

Roasting and Leaching Behavior of Nickel Laterite Ore ...

The sulfation-roasting-leaching process has the potential to change this scenario once it can be applied to all kinds of nickel laterite ores and does not consume much acid, as in the atmospheric leaching process. The main characteristic of the process is the iron sulfates decomposition during roasting steps, which produces sulfur trioxide (SO3).

LEACHING OF NICKEL LATERITE WITH A SOLUTION OF …

2015-7-1 · The effect of roasting the ore prior to leaching was investigated using optimum conditions obtained when leaching the unroasted ore. There was a slight improvement in nickel extraction when the ore was roasted. The average percentage extraction of nickel from 3 experimental runs was 19.25%±0.19 at 100oC, 3M NH 3, 2M (NH 4) 2 CO 3

Acid leaching of nickel from dunite rock

2021-3-21 · Aqueous leaching of raw ore finds little commercial application as the process, which is somewhat analogous to the natural weathering of laterites serpentines, is very slow and metal recoveries are generally low. 9,10 Despite this, aqueous leaching nickel ore may find some application in specific localized areas if nickel

Extraction of Nickel from Garnierite Laterite Ore Using ...

2020-4-15 · Extraction of Nickel from Garnierite Laterite Ore Using Roasting and Magnetic Separation with Calcium Chloride and Iron Concentrate Junhui Xiao 1,2,3 ... Laterite nickel deposit is formed by the weathering and leaching of nickel-bearing peridotite in tropical or subtropical regions. As a nickel ore, it was discovered by Garnier in New Caledonia ...

Extraction of molybdenum and nickel from roasted Ni–Mo …

: To extract molybdenum and nickel from the roasted Ni–Mo ore, a process of hydrochloric acid leaching, sulphation roasting and water leaching was investigated. The results showed that this process could get a high leaching rate of Mo and Ni.

Nickel laterite Part 1 – microstructure and phase ...

2013-7-18 · AbstractDetailed microstructure and phase characterisations of processed nickel laterite ore feed, reduced ore and leached ore have been carried out using scanning electron microscope, synchrotron X-ray powder diffraction and electron probe X-ray microanalysis as a part of study aimed to increase Ni recovery from the laterite ores. The majority of the nickel in the ore feed were found to be ...

Selective Leaching Nickel from the Pre-Reduced Limonitic ...

In this paper a novel method for selective leaching nickel from pre-reduced laterite ore at atmospheric pressure was reported. The reduced calcine was leached in thin acid liquor to liberate the nickel and iron together firstly. By properly controlling the leaching condition, the leached iron ion could hydrolyze as goethite precipitate and regenerate the acid consumed in the leaching procedure.

Nickel laterite Part 1 – microstructure and phase ...

2021-7-27 · Upon leaching, >90% of the nickel in the Fe rich matrix was leached out, while <50% was removed from the olivine and its composites. The characterisation results from this study were used to assist the analysis of thermodynamic and phase changes during reduction roasting and leaching described in Part 2 of the paper.

Extraction, phase transformation and kinetics of valuable ...

2021-1-1 · Abstract (NH4)2SO4 roasting followed by water leaching to process nickel- chromium mixed metal oxidized (MO) ore was investigated. The optimal operating parameters were obtained after determining the influences of the molar ratio of (NH4)2SO4 to ...

Recovery of valuable metals from a low-grade nickel ore ...

Metal leaching from a low-grade nickel ore was investigated using an ammonium sulfate roasting-water leaching process. The nickel ore was mixed with ammonium sulfate, followed by roasting and finally leaching with water. During the process the effects of the amount of ammonium sulfate, roasting temperature, and roasting time on the leaching recovery of metal elements were analyzed.

(PDF) Extraction of molybdenum and nickel from ...

The extraction of molybdenum and nickel from a carbonaceous shale ore was investigated by oxidation roasting, followed by sulphation roasting and water leaching.

Nickel laterite Part 1 – microstructure and phase ...

2016-12-5 · Nickel laterite Part 1 – microstructure and phase characterisations during reduction roasting and leaching M. A. Rhamdhani*1, P. C. Hayes2 and E. Jak2 Detailed microstructure and phase characterisations of processed nickel laterite ore feed, reduced ore and leached ore have been carried out using scanning electron microscope,

(PDF) The Effect of Alkali Roasting Pretreatment on Nickel ...

XRD patterns of (a) Ore + Na 2 CO 3, (b) ore + Na 2 SO 4 and (c) ore + NaOH after roasting and leaching with SO 2 -air. Cont. The selectivity of nickel over iron in various pH and temperature.

Nickel Heap Leaching

Nickel Heap Leaching. Heap leaching is a process that extracts valuable metals from ores by dissolving the metals in a solvent. The valuable metals can then be recovered from the solution by a variety of methods. Heap Leaching is an ancient process; leaching metals out of ore …

Atmospheric pressure leaching of nickel from a low …

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

The Effect of Alkali Roasting Pretreatment on Nickel ...

2020-8-7 · The literature refers to the application of alkali roasting as pretreatment in laterite ore leaching to increase nickel recovery. Thus, this study aims to apply the combination method of alkali roasting and leaching to extract nickel from limonite ore (1.33% Ni, 46.61% Fe) from the Southeast Sulawesi region.

The effect of pre-roasting on nickel extraction from ...

2020-9-21 · Pre-roasting of the limonite alters its mineralogical composition, thus making it more amenable to leaching. The leaching result of ores roasted contains higher Ni (4.80%) than raw ore (4.17%). The roasting temperature of 600°C appears to provide the maximum nickel recovery of 93.48%.

RU2412263C2

FIELD: metallurgy. SUBSTANCE: procedure consists in underground leaching nickel with solution of sulphuric acid and in pumping product solution out. Further, acidity of product solution is reduced, and nickel is sorbed on ionite resin with its following desorption. Upon desorption raffinate of nickel sorption is made-up with sulphuric acid and directed to leaching as leaching solution.

Heap leaching targets nickel from laterite

2017-3-1 · Heap leaching targets nickel from laterite. By Paul Grad | March 1, 2017. The NiWest Nickel Laterite Project located at Murrin Murrin in the North Eastern Goldfields of Western Australia, has the potential to become a significant long-term, low-cost nickel producer through the development of heap leaching.

Advances in research on nickel production through the ...

2016-12-5 · saprolitic ore mixtures during reduction roasting and leaching from the Yabulu process. The micro-structures observed were quite complex and include composite, fine-grain mixture, intergrowth, vein-like/platelike, porous and dense microstructures. Figure 1 shows the SXRD results of the ini-tial, reduced and leached ore samples from the nickel ...

Kinetics of nickel leaching from roasting-dissolving …

2009-5-27 · J. Cent. South Univ. Technol. (2009) 16: 0410−0415 DOI: 10.1007/s11771−009−0069−4 Kinetics of nickel leaching from roasting-dissolving residue of spent catalyst with sulfuric acid FENG Qi-ming(), SHAO Yan-hai(), OU Le-ming(

Nickel and Cobalt Exraction from Caldag Lateritic Nickel ...

2019-1-10 · implemented on nickel ore to take the nickel into the solution. First, atmospheric pressure sulphuric acid leaching process and then acid pug – roast – leach process have been applied to the grinded lateritic nickel ores and leaching efficiencies of these 2 methods were compared. After taking the nickel into the solution, iron removal and