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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.

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

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A laterite ore from Indonesia was used in this study. The chemical composition of nickel laterite ore is shown in Table 1, and its XRD pattern is shown in Fig. 1. As shown in Table 1 and Fig. 1, the main mineral of the raw nickel laterite ore is goethite and this laterite ore is a limonitic laterite ore. Powder coal was used as the reductant in the

EFFECT OF REDUCTION TEMPERATURE ON THE .

May 21st – 23rd 2014, Brno, Czech Republic, EU EFFECT OF REDUCTION TEMPERATURE ON THE CARBOTHERMIC REDUCTION PROCESS OF LATERITE ORES MIXING WITH BIO-COAL Guan-Jhou Chen1, Weng-Sing Hwang1, Shih-Hsien Liu2, Jia-Shyan Shiau2 and In-Gann Chen1 1 Department of Materials Science and Engineering National Cheng Kung University, Tainan, Taiwan,

Recovery of Nickel from Selectively Reduced Laterite Ore ...

In the sulphuric acid leaching of metallic nickel from roast-reduced lateritic ore, leaching rate of nickel is also found chemically controlled by reactions on the solid surface ( Purwanto et al ...

Thermodynamics of the Reduction Roasting of Nickeliferous ...

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ferous laterite (oxide) ores. Global nickel resources averaging a minimum nickel grade of about 1% contain about 130 million tons of nickel, and the distribution between the nickel sulphides and nickel laterites is estimated to be approximately 40% and 60%, re-spectively [1]. Nickeliferous laterite ores may be divided into two types: limonite and

Thermodynamics of the Reduction Roasting of Nickeliferous ...

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ferous laterite (oxide) ores. Global nickel resources averaging a minimum nickel grade of about 1% contain about 130 million tons of nickel, and the distribution between the nickel sulphides and nickel laterites is estimated to be approximately 40% and 60%, re-spectively [1]. Nickeliferous laterite ores may be divided into two types: limonite and

PAPER OPEN ACCESS The effect of iron content on the ...

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from laterite ores requires high energy costs, especially when laterite ores with low nickel content are processed. Because energy is mostly used to melt ore and produces only a little nickel metal and a large amount of slag. In addition, areas where large deposits of laterite ore are located do not have access to cheap electricity sources ...

US4195986A - Selective reduction of nickel laterite ores ...

To prepare nickel laterite ore for selective reduction of its nonferrous metal oxides, it is comminuted (preferably to 85% minus 200 mesh) and is mixed with comminuted (preferably minus 65 mesh) high volatile, high ash waste coal and a non-gaseous sulfur material. Carbon content of the coal is 50% to 150% of the amount of carbon needed for stoichiometric complete reduction of nonferrous ...

Phase transformation of nickel laterite ores in the ...

Abstract. Since it is difficult to extract nickel from laterite ores with low nickel grade by traditional beneficiating methods, the microstructure and phase transformation of a nickel laterite ore with the nickel grade of 1.49% were investigated by using a selective reduction roasting method at different roasting temperatures and time.

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

A laterite ore from Indonesia was used in this study. The chemical composition of nickel laterite ore is shown in Table 1, and its XRD pattern is shown in Fig. 1. As shown in Table 1 and Fig. 1, the main mineral of the raw nickel laterite ore is goethite and this laterite ore is a limonitic laterite ore. Powder coal was used as the reductant in the

CA2371159C - Fluidized bed reduction of laterite fines ...

The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated in situ by adding a reducing agent such as a carbonaceous material in the fluidized bed chamber, fluidizing the bed with an oxidizing gas and maintaining the reactor at a temperature sufficiently high to partially combust the coal and ...

US Patent for Reduction of laterite ores Patent (Patent ...

Lateritic nickel ores which also contain magnesia are subjected to a low temperature reduction using carbon monoxide as the sole reductant and are then subjected to a higher temperature heat treatment in an inert atmosphere for a time sufficient to stabilize the nickel in a readily extractable state. The reduction is accomplished at a temperature in the range of 300 to 450gree.C and the ...

An innovative process for extracting scandium from ...

Laterite ore contains iron, aluminum, magnesium, manganese, nickel, cobalt, and in some cases scandium. One main characteristic of laterites is the correlation between nickel and ferrous iron, which is also observed between scandium and ferrous iron.

Author: Jihye Kim, Gisele Azimi

Laterite Ore - an overview | ScienceDirect Topics

The laterite ore is dried and reduction roasted in hearth roasters in an atmosphere containing hydrogen and carbon monoxide in the absence of air. Nickel and cobalt are selectively reduced to the metallic form and thus rendered amenable to ammoniacal leaching, while iron remains as insoluble oxides and silicates. The reduced ore is cooled ...

Laterite - Wikipedia

DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC ORE USING .

morphology in nickel laterite limonitic reduction process by using coal-dolomite bed, AIP Conference Proceedings, 2018, 020033. 26. F. Abdul, S. Pintowantoro, A. Kawigraha, A. Nursidiq, Effects of reduction temperature to Ni and Fe con-tent and the morphology of agglomerate of reduced laterite limonitic nickel ore by coal-bed method, AIP

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Feasibility of co-reduction roasting of a saprolitic ...

May 29, 2018 · Alkaline metal salts were usually added to enhance reduction of laterite ores. The feasibility of co-reduction roasting of a saprolitic laterite ore and red mud was investigated. Results show that the red mud addition promoted the reduction of the saprolitic laterite ore and the iron ores in the red mud were co-reduced and recovered.

Reduction of a garnieritic laterite ore by CO-CO2 gas mixtures

In extraction of nickel from laterite ores, nickel has to be reduced to metallic form in pyrometallurgical processes. This paper studied the reduction of a garnieritic laterite ore in order to establish the extents and rates of reduction of nickel, cobalt and iron oxides under different conditions, reduction mechanisms, and the optimum conditions for selective reduction of nickel and cobalt ...

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New reagents selected for nickel extraction

Apr 07, 2015 · DSX technology could further add to the efficiencies realised by leaching ore with nitric acid instead of sulphuric acid, including lower costs, reagents recycling and reduced .

Carbonylation of Nickel and Iron from Reduced Oxides and ...

The extent of non-catalytic carbonylation of nickel from the selectively reduced BCS laterite ore at 100 °C and CO pressure 41 atm was below 50%. The use of catalysts in the carbonylation of selectively reduced ore was inefficient. The major parameter affecting the rate of ore carbonylation was the particle size. The rate of reaction increased ...

Research on Selective Reduction of Laterite Nickel Ore by ...

In this paper, thermodynamic analysis on reduction of lateritic nickel ore by CO2/H2 mixed gas was performed based on activity theory. Effects of CO2/H2 ratio and temperature on selective reduction of laterite ore were investigated. The calculation result shows that the metallization of Fe and Ni could be promoted by each other because of the variation of the Fe and Ni activity, which accounts ...

Study of Nickeliferrous Laterite Reduction

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Laterite is an important resource for the production of nickel. Pre-reduction of laterite is a critical step for all laterite based nickel production processes. The main kinds oflaterite, limonitic and serpentinic ore, behave differently upon reduction. Inthis study, general knowledge of laterites and nickel production were introduced. Research on

Cited by: 8

Reduction of Nickel and Iron from Low-Grade Nickel ...

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laterite ore was screened using a sieve to obtain particles with sizes smaller than 0.25mm. These were then formed into pellets with sizes of 0.25­0.38mm to ensure good breathability and reducibility. 2.3 Reduction process The nickel of the low-grade nickel laterite ore was reduced using a fixed-bed apparatus, as shown in Fig. 1.

Impacts of Laterite Mining of Nickel and Iron Ores on ...

p. 2 Impacts of Laterite Mining of Nickel and Iron Ores on Watersheds PREMISE Open pit, contour or strip mining of laterites involves removing 1 to 2 meters of topsoil to be able to extract the laterite, limonite and saprolite deposits which occupy the soil strata from 3 to 25 meters below the ground.

Selective leaching of nickel from prereduced limonitic ...

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raw ore in the traditional HPAL. This strategy is based on the fundamental fact that with respect to laterites nickel dissolution is directly correlated with iron dissolution. The simplified iron reactions during acid leaching of the pre-reduced limonitic laterite ore can .

Minerals | Free Full-Text | Sulfides Formation in ...

In this paper, a systematic thermodynamic analysis of carbothermic reduction of saprolitic nickel laterite ore was carried out. Different carbon sources—such as pure C, sub-bituminous, and lignite—were used for the carbothermic reduction at 1000 °C (1273 K). The effect of the different additives—such as S, FeS, Na2S, Na2SO4, and CaSO4—was also systematically evaluated.

SEPARATION OF NICKEL AND IRON FROM LATERITIC ORE USING .

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Separation of nickel and iron from lateritic ore using a digestion – roasting – leaching. 565 Currently, various hydrometallurgical processes are applied for extraction of nickel and cobalt from lateritic ores. Lateritic ores are rich in iron and after leaching process high contents of .

MICROWAVE VACUUM CARBOTHERMIC REDUCTION AND .

the ore. Therefore, very expensive leaching and smelting processes are required to process nickel laterite ore. The incentive for the present research was to develop a new carbothermic reduction process for nickel laterite ore that would produce a higher grade of nickel than current industrial techniques.

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The Effect of Bio-Coal on the Carbothermic Reduction of ...

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The Effect of Bio-Coal on the Carbothermic Reduction of Laterite Ores Guan-Jhou Chen1, Weng-Sing Hwang1,+, Shih-Hsien Liu2 and Jia-Shyan Shiau2 1Department of Materials Science and Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan 2Iron Making Process Development Section, Iron & Steel Research & Development Department,

Carbonylation of nickel and selectively reduced laterite ore

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