High Pressure Acid Leaching Of A Refractory Lateritic Nickel Ore
High Pressure Acid Leaching Of A Refractory Lateritic Nickel Ore
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High Pressure Acid Leaching Of A Refractory Lateritic Nickel Ore

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High pressure acid leaching of a refractory lateritic ...

Sep 01, 2011  Highlights Leaching temperature, leaching duration, sulfuric acid to ore weight ratio and particle size of the limonitic nickel laterite ore were studied. Optimum parameters determined as 255 o C, 0.30 sulfuric acid to ore weight ratio, a particle size of 100% −850μ, 1 h of leaching duration with 30% w/w. 87.3% of Ni and 88.8% of Co in the ore extracted into the PLS but, found to be below ...

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High pressure acid leaching of a refractory lateritic ...

This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite ore from the Gördes region of ...

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Author's personal copy - ResearchGate

High pressure acid leaching of a refractory lateritic nickel ore S. Kaya, Y.A. Topkaya Department of Metallurgical and Materials Engineering, Middle East Technical University (METU), 06531 Ankara ...

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WO2015009254A3 - High pressure acid leaching of refractory ...

The present invention relates to a process for recovering nickel, cobalt and scandium from refractory lateritic nickel ores, wherein in this process, lateritic nickel ores are subjected to high pressure acid leaching process with sulphuric acid and nickel, cobalt and scandium is selectively recovered from the pregnant leach solution or purification precipitates resulting from releaching process.

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HIGH PRESSURE SULPHURIC ACID LEACHING OF LATERITIC

In high pressure acid leaching processes, lateritic nickel ores are interacted with aqueous sulphuric acid solutions in acid resistant autoclaves at temperatures of 230-270 °C and under pressures of 3.3-5.5 MPa for 60-180 minutes. Under these leaching conditions, iron mainly follow a dissolution-precipitation path, forming insoluble solid

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(PDF) High pressure acid leaching: a newly introduced ...

This study investigated the high-pressure acid leaching behavior of scandium (Sc) together with nickel (Ni) and cobalt (Co) from a refractory nickel laterite ore.

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Pressure acid leaching of Çaldağ lateritic nickel ore: An ...

Feb 01, 2014  In this study, the leachability of Çaldağ lateritic nickel ore under high pressure acid leaching (HPAL) conditions was investigated. Several HPAL parameters were tested in a comparative manner since in many cases, the extraction efficiencies of Çaldağ ore sample were more than 90% for nickel and cobalt.

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Author's personal copy - ResearchGate

High pressure acid leaching of a refractory lateritic nickel ore S. Kaya, Y.A. Topkaya Department of Metallurgical and Materials Engineering, Middle East Technical University (METU), 06531 Ankara ...

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(PDF) High pressure acid leaching: a newly introduced ...

This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite ore from the Gördes region of ...

More

Pressure acid leaching of Çaldağ lateritic nickel ore: An ...

Feb 01, 2014  In this study, the leachability of Çaldağ lateritic nickel ore under high pressure acid leaching (HPAL) conditions was investigated. Several HPAL parameters were tested in a comparative manner since in many cases, the extraction efficiencies of Çaldağ ore sample were more than 90% for nickel and cobalt.

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Pressure Acid Leaching of Nickel Laterites: A Review

Depending upon the layers and types of lateritic ores, different approaches like high-pressure acid leaching (HPAL) dealing to limonitic laterites and rotary kiln electric furnace (RKEF) dealing ...

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High Pressure Acid Leach - Caldera Engineering

Overview. High Pressure Acid Leach (HPAL) is a process used to extract nickel and cobalt from laterite ore bodies. The HPAL process utilizes elevated temperatures (roughly 255 degrees Celsius), elevated pressures (roughly 50 bar or 725 psi), and sulfuric acid to separate nickel and cobalt from the laterite ore.

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Pressure Acid Leaching of Nickel Laterites: A Review ...

Abstract 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. Particular attention is paid to the leaching experience of the commercial Moa ...

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Leaching of a Turkish Lateritic Nickel Ore in Nitric Acid ...

This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite ore from the Gördes region of ...

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Acid Pressure Leaching of Nickeliferous Laterite Ore

Aug 13, 2018  The first commercial operation to utilize sulfuric acid pressure leaching to process nickeliferous laterite ore was Freeport Sulfur’s Moa Bay plant in Cuba. The Cuban government expropriated this plant in 1960 shortly after startup. The ore contained about 48% Fe, 5% Al, 4% SiO2, 1.4% Ni, and less than 1% Mg.

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High pressure acid leaching: a newly introduced technology ...

Jan 02, 2020  2018 Feasibility Report of High Pressure Acid Leach in Obi Island (South Halmahera, Indonesia) PT Halmahera Lygend. Google Scholar. ... Kaya S. and Topkaya Y.A. 2011 High pressure acid leaching of a refractory lateritic nickel ore 1188-1197. Google Scholar. Chang Y., ...

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Lateritic nickel ore deposits - Wikipedia

Lateritic nickel ore deposits are surficial, ... High pressure acid leach processing is employed for two types of nickel laterite ores: Ores with a limonitic character such as the deposits of the Moa district in Cuba and southeast New Caledonia at Goro where nickel is bound in goethite and asbolan.

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Nickel extraction from low grade laterite by agitation ...

Jul 01, 2014  Earlier studies indicated that nickel extraction from lateritic ores was strongly dependent on types of nickel bearing mineral, leaching temperature and sulfuric acid concentration . Further studies were carried out to examine the atmospheric leaching (AL) of nickel laterite ores with sulfuric acid and chloride and bio-technologies [7] , [8] .

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Kinetics of high pressure leaching of nickel lateritic ore ...

nickel lateritic ore leaching in sulphuric acid solutions at high pressure conditions. Evaluation of thermodynamic equilibrium in system Me-S-H20 is considered by Eh- pH diagrams in Software "Factsage". Domains of stability and CO-existing scope of different form and compound are present for Ni, Co, Mg, Al and Fe at 250°C. Nickel

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Kinetics of High Pressure Leaching of the Serbian Nickel ...

Vuöuroviö et al. [6] have obtained the high degree of nickel and cobalt recovery in ammonium-carbonate and sulphuric acid leaching conditions at high pressure conditions. Sulphuric acid pressure leaching ofnickeliferous laterites has attracted considerable attention from the nickel

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PRESSURE LEACHING - RPMGlobal

Lateritic nickel-cobalt ores are also processed through autoclaves utilizing the “pressure-acid leach” process (PAL). Process chemistry consists of an an acid digestion, but recovery is increased temperatures (255o-270o C) and pressures (4,000 kPa – 5,300

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Pressure Acid Leaching of Nickel Laterites: A Review ...

Abstract 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. Particular attention is paid to the leaching experience of the commercial Moa ...

More

Kinetics of high pressure leaching of nickel lateritic ore ...

nickel lateritic ore leaching in sulphuric acid solutions at high pressure conditions. Evaluation of thermodynamic equilibrium in system Me-S-H20 is considered by Eh- pH diagrams in Software "Factsage". Domains of stability and CO-existing scope of different form and compound are present for Ni, Co, Mg, Al and Fe at 250°C. Nickel

More

Lateritic nickel ore deposits - Wikipedia

Lateritic nickel ore deposits are surficial, ... High pressure acid leach processing is employed for two types of nickel laterite ores: Ores with a limonitic character such as the deposits of the Moa district in Cuba and southeast New Caledonia at Goro where nickel is bound in goethite and asbolan.

More

PRESSURE LEACHING - RPMGlobal

Lateritic nickel-cobalt ores are also processed through autoclaves utilizing the “pressure-acid leach” process (PAL). Process chemistry consists of an an acid digestion, but recovery is increased temperatures (255o-270o C) and pressures (4,000 kPa – 5,300

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HIGH PRESSURE ACID LEACHING OF TURKISH LATERITES A

The high pressure acid leach (HPAL) experiments were conducted with nontronitic and limonitic types of Gördes lateritic nickel ore, respectively. Leaching experiments of nontronite ore have shown that almost all of the nickel and cobalt contained in the

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Leaching and Solution Chemistry (Chapter 3) - Clays in the ...

High pressure acid leaching of a refractory lateritic nickel ore. ... Reductive atmospheric acid leaching of lateritic smectite/nontronite ores in H2SO4/Cu(II)/SO2 solutions. ... Secondary losses of nickel and cobalt during the autoclave leaching oxidized nickel ores.

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Quantitative microstructural characterization of ...

high-pressure acid leaching of lateritic nickel ore Nicholas E. Timms,1,* Jia N li,2 a N d sTE v EN m. RE ddy 1 1The Institute for Geoscience Research (TIGeR), Department of Applied Geology, Curtin University of Technology, GPO Box U 1987, Perth, Western Australia 6845, Australia

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Nickel and Cobalt Exraction from Caldag Lateritic Nickel ...

from ore containing Mg below 4% with high pressure acid leach process. [5] However, studies have been made to apply atmospheric pressure acid leaching due to high cost autoclave requirement of high pressure acid leach. In the atmospheric pressure acid leaching studies that conducted, it was possible to obtain 85% nickel in 40-80 days from the

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EXTRACTION OF NICKEL AND COBALT FROM LATERITIC

studies involved the optimization of nitric acid leaching of nickel laterite ores at atmospheric pressure for high nickel and cobalt extraction. The main parameters optimized after the characterization of laterites were the nitric acid concentration, leaching temperature, duration of leaching and the particle size of the ore sample.

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Removal of iron from acidic leach liquor of lateritic ...

At high leaching temperature, normally Due to the nature of the leaching process, most of the metals within the 240–260 °C, the leached iron and aluminum hydrolyze and precipitate ore are dissolved during leaching, resulting in high acid consumption. as hematite and a range of mixed alunite/jarosite phase.

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US3809549A - Acid leaching of lateritic ore - Google Patents

nickel values are acid leached from nickeliferous oxide orres by forming an aqueous slurry of ore and pyrites in an autoclave and oxidizing the pyrites at a temperature between about 200*c. and 260*c. to provide a sulfuric acid solution for selectively leaching the nickel values contained in the nickeliferous oxide ore without encountering undue scale formation on the autoclave walls and in ...

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High Pressure Acid Leach Pressure Oxidation

Uranium Nickel Gold Copper Cobalt Rare earths Zinc High Pressure Acid Leach (HPAL) and Pressure Oxidation (POX) testing services provide a unique opportunity to evaluate and optimise the most economically viable process routes for the recovery of most metals such as nickel from lateritic ores and gold from refractory ores.

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US4410498A - Acid leaching of nickel from serpentinic ...

Sulphuric acid leaching has been used in the treatment of lateritic ores for the recovery of nickel and cobalt therefrom. However, in order to obtain good extraction from these ores, prolonged treatment using acid of high strength and also using high pressures and recycling steps have been necessary. In the improved method of the invention nickel and cobalt is solubilized from high-magnesia ...

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The HPAL Process :: Total Materia Article

High-pressure acid leaching (HPAL) is being used for the recovery of nickel from nickel laterite ores, and increasingly atmospheric leaching is also being considered. As mentioned above, major reserves of nickel are contained in laterite ores, which have traditionally been treated by pyrometallurgical methods.

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