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Kinetic Studies of the Reduction of Limonitic Nickel Ore ...

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 (55.8pct). 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

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Extraction of nickel and cobalt from nickeliferous ...

Oct 10, 2017  The present study proposes a new smelting process for limonitic nickeliferous laterite ore in order to separate nickel and cobalt from the ore and produce a nickel matte at lower smelting temperature compared with the current industrial techniques. The nickel and cobalt recoveries were evaluated at various flux additions.

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Effective Utilization of Limonitic Nickel Laterite via ...

Limonitic laterite contains low iron and nickel grades and much high smelting minerals and loss on ignition (LOI), identified as refractory iron ore for sintering. Thus, sinter pot tests of limonitic laterite via pressurized densification sintering and its intensification mechanism were conducted, and the industrial application prospect was explored.

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Direct Reduction of Limonitic Laterite Nickel Ore with ...

The increasing demand for stainless steel and the scarcity of sulfide nickel ore affect the increase of laterite nickel ore processing. One of the processes that has been proven can be applied to process laterite nickel ore is direct reduction. In the direct reduction, the reduction atmosphere was adjusted by controlling the volume of CO and CO2 from carbon source materials, such as coal ...

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Separation of iron-nickel alloy nugget from limonitic ...

Nickel laterite ores generally consist of three main layers [3]. The layer close to the surface is the limonitic ore body, the layer near to the bottom of the ore body is the saprolitic ore body, and the limonitic ore can be separated from the saprolitic ore by a transition zone. Because of the low nickel

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A Study on Classification of Limonite and Saprolite from ...

Dec 05, 2020  In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore

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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 Caron leach of mixed nickel-cobalt hydroxide,” PhD Thesis of Applied Chemistry and Mineral Science, MurdochUniversity, 2013. ...

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Kinetic Studies of the Reduction of Limonitic Nickel Ore ...

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 (55.8pct). 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

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PAPER OPEN ACCESS The kinetic study of limonitic low grade ...

The kinetic study of limonitic low grade nickel ore leaching using hydrochloric acid To cite this article: H S E A Gustiana et al 2019 IOP Conf. Ser.: Mater. Sci. Eng. 478 012009 View the article online for updates and enhancements. This content was downloaded from IP address 207.46.13.135 on 07/04/2020 at 18:13

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Selective Reduction of Laterite Nickel Ore

Limonitic nickel ore contains iron oxide in the form of goethite (¡-FeOOH). The limonitic nickel ore is also relatively rich in cobalt and chromium. Iron oxide from limonitic nickel ore has an amorphous crystal structure with a crystal size in a nanometer scale and a large surface area.

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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 Caron leach of mixed nickel-cobalt hydroxide,” PhD Thesis of Applied Chemistry and Mineral Science, MurdochUniversity, 2013. ...

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Recovery of nickel and cobalt as MHP from limonitic ore ...

In the present study, precipitation of nickel and cobalt as mixed hydroxide precipitate (MHP) from pregnant leach solution of nickel limonite ore from Soroako after iron removal stage was carried out. A series of MHP precipitation experiments was conducted by using MgO slurry as neutralizing agent and the effects of pH, temperature, duration of precipitation and the addition of MHP seed on the ...

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(PDF) High pressure acid leaching of a refractory ...

The nickel extractions were optimised at 96% for the nontronitic ore and 95% for the limonitic ore, at the above acid loadings, when process water sodium ion levels were increased to 4g/L and 2g/L ...

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Selective leaching of nickel from prereduced limonitic ...

In this paper, the selective acid leaching of nickel from the pre-reduced limonitic laterite under moderate HPAL conditions was studied. For the calcine with reduction degree of 93.4%, about 88.2% nickel could be selectively extracted at 100°C with an acid/ore ratio of 0.164, leaving less then 5.0g/L iron in the solution. Further

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Teck's CESL Nickel Process: Advancing Towards a Commercial ...

Disseminated nickel ore bodies are widely distributed around the world and are found in most of the known nickel sulphide districts. Teck has developed a novel hydrometallurgical process for treating ... balance of nickel supply comes from limonitic and saprolitic laterite deposits which represent an abundant nickel resource. [1,15]

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EXTRACTION OF NICKEL AND COBALT FROM LATERITIC

of the ore sample. The atmospheric leaching experiments were conducted on the 70% limonitic 30% nontronitic ore mixture obtained from the Gördes open pit mine. Considering the similar studies from literature and highest nickel and cobalt extraction into account, the process parameters optimized as; leaching at 104°C

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WO2009033227A1 - Limonite and saprolite heap leach process ...

A process for the recovery of nickel and/or cobalt from a lateritic ore by heap leaching, the process including the steps of : a) forming one or more heaps from a lateritic ore body wherein that lateritic ore body includes a blend of both limonitic and saprolitic type ores; b) leaching the one or more heaps with a leach solution; and c) recovering the nickel and/or cobalt from the resultant ...

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Enhanced methods for nickel recovery from low-grade ores ...

All nickel ores have relatively low nickel content, the classification is as follows: high-grade nickel ore has Ni content greater than 1.8%, middle-grade nickel ore has Ni content between 1.3-1.7%, low-grade nickel ore has Ni content between 0.6-1.2%. Nickel is continuously mined, even at these low percentages of ores, because it is in high ...

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Minerals and Materials Processing Laboratory - Departemen ...

2020, Analysis the Effect of Charcoal Mass Variation to Ni Content, Sinter Strength and Yield on Sintering Process of Limonitic Laterite Nickel Ore, F Abdul, S Pintowantoro, A Maulidani, Key Engineering Materials 867, 25-31; 2020, DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC ORE USING A COAL-DOLOMITE MIXTURE BED AND Na 2 SO 4 AS A SELECTIVE AGENT.

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Leaching behavior of metals from limonitic laterite ore by ...

125 kg/t ore to 400 kg/t ore at 250 °C with leaching time of 1 h and L/S ratio of 3:1(i.e. 3 L water and 1 kg ore). From the results shown in Fig.3, it can be found that the nickel extraction efficiency obviously increases with the increase of sulfuric acid added and reaches to 98% when the amount of acid added is up to 250 kg/t ore, and with

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Factors Affecting the Upgrading of a Nickeliferous ...

ore combined together to form olivine ((Mg,Fe,Ni)2SiO4), and Ni2+ was substituted for Mg2+ in the silicate matrix. The activity of nickel oxide in the silicate solid solution is low, and this explained the poor reducibility using gaseous reductants. The effect of precalcination on the reducibility of the limonitic ore in a H2/CO2 atmosphere

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Factors Affecting the Upgrading of a Nickeliferous ...

ore combined together to form olivine ((Mg,Fe,Ni)2SiO4), and Ni2+ was substituted for Mg2+ in the silicate matrix. The activity of nickel oxide in the silicate solid solution is low, and this explained the poor reducibility using gaseous reductants. The effect of precalcination on the reducibility of the limonitic ore in a H2/CO2 atmosphere

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Selective Reduction of Laterite Nickel Ore

Limonitic nickel ore contains iron oxide in the form of goethite (¡-FeOOH). The limonitic nickel ore is also relatively rich in cobalt and chromium. Iron oxide from limonitic nickel ore has an amorphous crystal structure with a crystal size in a nanometer scale and a large surface area.

More

(PDF) High pressure acid leaching of a refractory ...

The nickel extractions were optimised at 96% for the nontronitic ore and 95% for the limonitic ore, at the above acid loadings, when process water sodium ion levels were increased to 4g/L and 2g/L ...

More

Teck's CESL Nickel Process: Advancing Towards a Commercial ...

Disseminated nickel ore bodies are widely distributed around the world and are found in most of the known nickel sulphide districts. Teck has developed a novel hydrometallurgical process for treating ... balance of nickel supply comes from limonitic and saprolitic laterite deposits which represent an abundant nickel resource. [1,15]

More

Recovery of nickel and cobalt as MHP from limonitic ore ...

In the present study, precipitation of nickel and cobalt as mixed hydroxide precipitate (MHP) from pregnant leach solution of nickel limonite ore from Soroako after iron removal stage was carried out. A series of MHP precipitation experiments was conducted by using MgO slurry as neutralizing agent and the effects of pH, temperature, duration of precipitation and the addition of MHP seed on the ...

More

WO2009033227A1 - Limonite and saprolite heap leach process ...

A process for the recovery of nickel and/or cobalt from a lateritic ore by heap leaching, the process including the steps of : a) forming one or more heaps from a lateritic ore body wherein that lateritic ore body includes a blend of both limonitic and saprolitic type ores; b) leaching the one or more heaps with a leach solution; and c) recovering the nickel and/or cobalt from the resultant ...

More

Leaching behavior of metals from limonitic laterite ore by ...

125 kg/t ore to 400 kg/t ore at 250 °C with leaching time of 1 h and L/S ratio of 3:1(i.e. 3 L water and 1 kg ore). From the results shown in Fig.3, it can be found that the nickel extraction efficiency obviously increases with the increase of sulfuric acid added and reaches to 98% when the amount of acid added is up to 250 kg/t ore, and with

More

EXTRACTION OF NICKEL AND COBALT FROM LATERITIC

of the ore sample. The atmospheric leaching experiments were conducted on the 70% limonitic 30% nontronitic ore mixture obtained from the Gördes open pit mine. Considering the similar studies from literature and highest nickel and cobalt extraction into account, the process parameters optimized as; leaching at 104°C

More

Atmospheric pressure leaching of nickel from a low-grade ...

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

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Minerals and Materials Processing Laboratory - Departemen ...

2020, Analysis the Effect of Charcoal Mass Variation to Ni Content, Sinter Strength and Yield on Sintering Process of Limonitic Laterite Nickel Ore, F Abdul, S Pintowantoro, A Maulidani, Key Engineering Materials 867, 25-31; 2020, DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC ORE USING A COAL-DOLOMITE MIXTURE BED AND Na 2 SO 4 AS A SELECTIVE AGENT.

More

Enhanced methods for nickel recovery from low-grade ores ...

All nickel ores have relatively low nickel content, the classification is as follows: high-grade nickel ore has Ni content greater than 1.8%, middle-grade nickel ore has Ni content between 1.3-1.7%, low-grade nickel ore has Ni content between 0.6-1.2%. Nickel is continuously mined, even at these low percentages of ores, because it is in high ...

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The Caron Process :: Total Materia Article

The Caron process, which involves reduction roasting of the ore followed by ammonia leaching of reduced ore, is one of the ways in which nickel laterite can be treated. It has been successfully used in processing the iron-rich limonitic part of the nickel laterite ore body.

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Effects of reduction temperature to Ni and Fe content and ...

This research aims to optimized the process of nickel laterite ore extraction using coal bed method. This research was conducted by reducing low grade nickel laterite ore (limonitic) with nickel content of 1.25 %. The reduction process was carried out using CO gas which formed by

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Kinetic study on leaching of nickel from Turkish lateritic ...

was a typical limonitic laterite ore with high iron content. It was ground to size less than 106 µm for acid leaching. The elemental composition of the sample is given in Table 1. Table 1 Elemental analysis of lateritic nickel ore sample [35] Element Ni Fe Mg Co Mass fraction/% 1.84 23.14 1.58 0.03 XRD pattern of the ore sample is given in Fig. 1.

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