Pressure Acid Leaching Technology of Laterite Nickel Ore



High pressure acid leaching a newly introduced

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

Effect of Magnesium on Pressure Leaching of Moa Laterite

Abstract The magnesium content of laterite ore has a significant impact on the quantity of sulphuric acid required to achieve the target nickel extraction by the high pressure acid leach HPAL process both through direct consumption of acid when magnesium bearing minerals are dissolved and through buffering effects via bisulphate ion equilibria at temperature in the leach reactor

Acid Pressure Leaching of Nickeliferous Laterite Ore

The AMAX sulfuric acid leaching process involves countercurrent digestion of nickeliferous laterite ore at high pressure and at atmospheric conditions After solid/liquid separation the nickel and cobalt values are precipitated by hydrogen sulfide and refined into nickel and cobalt metal Research at AMAX began in the early 1970 s at AMAX

High pressure acid leaching a newly introduced technology

High pressure acid leaching a newly introduced technology in Indonesia PT Halmahera Persada Lygend PTHPL plans to construct new technology for nickel laterite ore processing in Obi Island North Maluku Province The facility is expected to produce 247 000 tonnes of NiSO4 7H2O and 32 000 tonnes of CoSO4 7H2O to be sold for the raw material

Pressure Acid Leaching of Nickel Laterites A Review

Pressure Acid Leaching of Nickel Laterites A Review Optimum leaching conditions and final liquor composition varies according to the ore mineralogy More fundamental studies have demonstrated that the rate of leaching and character of the residue is dependent upon the level of Mg Mn and Cr in the ore the Eh of the slurry and salinity of

COMPARATIVE STUDY OF HIGH PRESSURE AND

In atmospheric acid leaching experiments although the nickel and cobalt extraction efficiencies were almost 100 the problems encountered like acid consumption dirty pregnant leach solution formation etc affected its feasibility negatively Keywords Hydrometallurgy high pressure acid leaching atmospheric leaching nickel

Nickel and Cobalt

Nickel and cobalt were recovered from Ramu laterite type nickel ore with high pressure acid leaching technology The process introduced in detail includes slurry treatment high pressure acid leaching HPAL cycling leaching and slurry neutralization CCD countercurrent washing iron and aluminum removal with neutralization precipitation of nickel hydroxide and cobalt hydroxide deep sea

COMPARATIVE STUDY OF HIGH PRESSURE AND

In atmospheric acid leaching experiments although the nickel and cobalt extraction efficiencies were almost 100 the problems encountered like acid consumption dirty pregnant leach solution formation etc affected its feasibility negatively Keywords Hydrometallurgy high pressure acid leaching atmospheric leaching nickel arsenic

Acid leaching of nickel from serpentinic laterite ores

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 sulphuric acid in

Pressure acid leaching of Çaldağ lateritic nickel ore An

Abstract In this study the leachability of Caldag 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 Caldag ore sample were more than 90 for nickel and cobalt After the optimization of the process parameters it was found that 94 1 nickel

Study of Nickel Leaching Using Sulfuric Acid and

Study of nickel leaching using sulfuric acid and phosphoric acid on the selectivity of low grade laterite nickel ore under atmospheric conditions has been successfully carried out In this study the laterite nickel leaching process was carried out by varying the solution concentration and operating time

Kinetics of High Pressure Leaching of the Serbian Nickel

ters of nickel laterite leaching from deposits in Serbia with a use of sulfuric acid in autoclave namely reaction time and temperature total gas pressure and acid concentration necessary for maximum transfer of nickel into solution Because of the large presence of nickel laterite in South

Pressure acid leaching of Çaldağ lateritic nickel ore An

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

Pressure acid leaching of nickel lateriteCORE

Pressure acid leaching of nickel laterite By Guizhen Chen Abstract Pressure acid leaching is an acceptable process for the treatment of nickel laterites This process offers many advantages such as low energy consumption low capital cost and high nickel and cobalt recoveries with acid/ore = 0 19 nickel and cobalt extractions reached

PRESSURE LEACHING OF SİVRİHİSAR YUNUSEMRE

To extract high amounts of nickel and cobalt from the laterite matrix leaching duration leaching temperature and sulfuric acid/ore ratio were studied at fixed conditions of 850 µ limonitic ore particle size and 40 solids concentration The Sivrihisar limonitic nickel laterite ore was found to

Pressure acid leaching of arid region nickel laterite ore

High temperature pressure acid leaching of nickel laterites is currently used for the recovery of nickel and cobalt by processing plants in Western Australia Bulong Cawse and Murrin Murrin Whittington and Muir 2000 Whittington et al 2003 previously examined the chemistry occurring under conditions relevant to the Bulong processing plant

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

Pressure Acid Leaching of Nickel Laterites A Review

Pressure Acid Leaching of Nickel Laterites A Review Optimum leaching conditions and final liquor composition varies according to the ore mineralogy More fundamental studies have demonstrated that the rate of leaching and character of the residue is dependent upon the level of Mg Mn and Cr in the ore the Eh of the slurry and salinity of

Pressure Acid Leaching of Nickel Laterites A Review

Due to economic reasons sulfuric acid has been predominantly used For example the pressure leaching PAL process and high pressure leaching HPAL processes are

PPTHigh Pressure Acid Leaching of Nickel Laterite Ores

Global Nickel cobalt manganese acid lithium Market Insights and Forecast to 2026Free Research Report PDF https //bityl/3JO7 Nickel cobalt manganese acid lithium market is segmented by Type and by Application Players stakeholders and other participants in the global Nickel cobalt manganese acid lithium market will be able to gain the upper hand as they use the report as a powerful

USB1Acid leaching of nickel laterite ores for

An improved process of hydrometallurgical treatment of laterite ores predominantly of the limonitic type for the recovery of nickel and cobalt using sulphuric acid In order to obtain high extractions of these metals while treating these ores in their humid state in reaction times of up to 60 minutes temperatures of up to 270 C and corresponding pressures of up to 800 psia are used

KINETIC MODELS OF NICKEL LATERITE ORE LEACHING

The subject of this study is leaching process of nickel bearing laterite ore from Ržanovo R Macedonia The influence of sulfuric acid concentration 0 5 1 and 3 M H2SO4 on the extracted Ni wt was studied The leaching process intensified by magnetic stirring at different temperatures 298 323 348 and 363 K in the time interval of 120 min was performed

Why heap leach nickel laterites

Nickel Laterite Heap leaching is simple and flexible and can be applied to the many laterite deposits that currently have no realistic path to production This paper aims to review the current state of nickel laterite processing and aims to show that heap leaching of nickel laterites is a viable and economically attractive alternative

Leaching of Low Grade Nickel Ores by Fungi Metabolic

Commercial nickel laterite processing routes such as high pressure acid leaching the Caron process ferronickel and nickel matte smelting are energy intensive and have costly operations 3 There is therefore a need to implement alternative technologies to address the economic and environmental issues associated with laterite ore processing

Pressure acid leaching of nickel lateriteUBC Library

Pressure acid leaching is an acceptable process for the treatment of nickel laterites This process offers many advantages such as low energy consumption low capital cost and high nickel and cobalt recoveries The dissolution process is coupled to selective thermal hydrolysis of iron and aluminum The dissolution of laterite and precipitation of iron and aluminum are strongly dependent on the

Technical Cost Comparison of Laterite Treatment

industry rotary kiln/electric furnace technology This has led to the rise of other technologies for example pressure acid leachingand processes operating at atmospheric pressure including heap leaching and agitated tank leaching with sulphuric acid Novel processes using hydrochloric acid and nitric acidare also under development

High pressure acid leaching a newly introduced

High pressure acid leaching a newly introduced technology in Indonesia PT Halmahera Persada Lygend PTHPL plans to construct new technology for nickel laterite ore processing in Obi Island North Maluku Province The facility is expected to produce 247 000 tonnes of NiSO4 7H2O and 32 000 tonnes of CoSO4 7H2O to be sold for the raw material

PRESSURE LEACHING OF SİVRİHİSAR YUNUSEMRE

To extract high amounts of nickel and cobalt from the laterite matrix leaching duration leaching temperature and sulfuric acid/ore ratio were studied at fixed conditions of 850 µ limonitic ore particle size and 40 solids concentration The Sivrihisar limonitic nickel laterite ore was found to

Treatment of Nickel Cobalt Laterites

magnesium content is generally a major factor in determining whether pressure acid leaching is likely to be economic For a Moa Bay type project the historical view has been that the upper limit would be about 3 Mg However it varies on a project to project basis depending on the cost of acid the nickel and cobalt contents and the metal prices

HIGH PRESSURE SULPHURIC ACID LEACHING OF

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

Atmospheric pressure leaching of nickel from a low grade

In general High Pressure Acid Leach HPAL is known as the most effective aqueous treatment process for the extraction of valuable metals from laterite ores Dalvi et al 2004 But the process requires specialized equipment and high operating temperature 245–270 C and pressure 4–5 MPa McDonald and Whittington 2008a Meanwhile Atmospheric Leaching AL has also been reported for processing various limonitic and saprolitic laterite ores McDonald and Whittington 2008a 2008b The AL process has low energy consumption and capital costs However if sulfuric acid leaching conditions could be optimized keeping in mind the problems such as high acid consumption high dissolved iron content in pregnant leach solution and high residual acid concentration the leaching of nickel laterites

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

Nickel Sulfide Versus Laterite The Hard Sustainability

materials and processing technology such as high pressure acid leaching HPAL Although some were financial and technical failures e g Cawse and Bulong Western Australia the Murrin Murrin WA project survived and is now producing near design capacity At present several new nickel laterite

High pressure acid leaching a newly introduced technology

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

Atmospheric pressure acid leaching of Caldag lateritic

During atmospheric pressure acid leaching metals are typically extracted from lateritic nickel ores through solubilisation by mineral acids to partially or completely extract the nickel cobalt iron and other soluble metals This process is carried out at just below 100

High Pressure Acid LeachCaldera Engineering

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 HPAL has been used since 1961 when it was

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