limonitic nickel ore
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limonitic nickel ore

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

2020-4-21  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 (55.8 pct). 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 of this

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Utilization of limonitic nickel laterite to produce ...

2019-2-1  Limonitic nickel laterite, characterized by its relatively high iron grade and low nickel content, is very difficult to upgrade. The current work explores improving the beneficiation of nickel from limonitic laterite ore through interaction of silica and calcium sulfate in a selective reduction-wet magnetic separation process.

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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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PAPER OPEN ACCESS The kinetic study of limonitic low

2020-4-7  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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Effect of a thermal pretreatment on dissolution kinetics ...

2020-9-1  The dissolution kinetics of a limonitic nickel laterite ore in chloride media was studied in this work. Variables, such as acid concentration, addition of chloride ions to the system and the leaching temperature, were shown to have a significant effect on the nickel extraction. Therefore, increasing hydrochloric acid and the total chloride ion ...

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Extraction of nickel and cobalt from nickeliferous ...

2017-10-10  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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Recovery of nickel and cobalt as MHP from limonitic ore ...

Recovery of nickel and cobalt as MHP from limonitic ore leaching solution: Kinetics. analysis and precipitate characterization. Nina Safitri, M. Zaki Mubarok, Ronny

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镍:第三篇第一章《镍矿—镍矿概述》 - 知乎

2018-9-30  第二层:Limonitic Nickel Ore(镍褐铁矿)Ni 1.4-1.9% Fe 20%-30% 第三层:Saprolite Nickel Ore(腐泥土镍矿)Ni 2.0-2.6% Fe15% 左右 图 1:红土镍矿成矿图 (3)开采方法 红土镍矿为露天开采,作业设备简单,通常包含如下几个步骤: ①推土机清理和剥离 ...

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

2020-11-1  1. Introduction. Nickel laterite ore can be physically and chemically divided into two groups: saprolitic and limonitic. Saprolitic ores are mainly composed of silicates and hydrous silicates, whereas limonitic ores are basically composed of oxides and hydroxides , .Nickel, in laterite ore, appears mainly in the crystalline lattice of iron oxides/hydroxides and silicates, replacing iron and ...

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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 ...

Read More
Utilization of limonitic nickel laterite to produce ...

Limonitic nickel laterite, characterized by its relatively high iron grade and low nickel content, is very difficult to upgrade. The current work explores improving the beneficiation of nickel from limonitic laterite ore through interaction of silica and calcium sulfate in a

Read More
Extraction of nickel and cobalt from nickeliferous ...

2017-10-10  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.

Read More
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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Gypsum utilization on selective reduction of limonitic ...

The results indicate that gypsum can provide a selective effect on the direct reduction process of laterite nickel ore. A selective effect that lowers the grade of iron can occur due to the formation of iron sulfides. The use of 12% gypsum was able to produce a product with Ni grade of 4.13%, Ni recovery of 91.81%, and selectivity factor of 5.72.

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Mineralogical Characterization of Limonitic Laterite from ...

2020-9-13  The contribution of laterite nickel ore to global nickel production has increased from less than 10% in the 1950s to over 50% today [20, 21]. Laterite nickel ores are generally divided into limonitic, saprolitic, and transition layers with significant

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

Recovery of nickel and cobalt as MHP from limonitic ore leaching solution: Kinetics. analysis and precipitate characterization. Nina Safitri, M. Zaki Mubarok, Ronny Winarko, and Zela T anlega.

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

2018-4-3  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

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Comparative atmospheric leaching characteristics of ...

2021-9-23  Ore characterisation showed that the major minerals in limonitic laterite were goethite, magnetite, hematite, and saprolitic laterite mainly consisted of goethite, magnetite, lizardite, clinochlore. Sc in two different types of laterite nickel ore are distributed widely among minerals, but it mainly hosts in Al-bearing goethite and silicate minerals.

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Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore ...

Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate was roasted with the addition of ammonium sulfate under a static air atmosphere, and the roasted products were leached by water, in order to evaluate the extraction of metals.

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[PDF] DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC

Nickel finds a wide industrial application. It is obtained through extraction from nickel-containing ores. The metal extraction using a lateritic nickel ore becomes an important alternative because of nickel sulphide ore reserves decrease. This study aims to determine the coal to dolomite mass ratio that can produce ferronickel products of high nickel recovery, content, and selectivity.

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limonitic nickel ore - jurajskimlyn.pl

limonitic nickel ore. limonitic nickel ore. other work [12,13], on the limonitic laterite ore, nickel is rich in goethite accompanied by intergrowth of silicate minerals. This is also evident in SEM analysis resulted from Fig. 3(h), wherein Ni and Si both show weak peaks compared with Fig. 3(e). The EPMA. live chat

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

DOI: 10.1007/s11663-020-01841-9 Corpus ID: 216049294. Kinetic Studies of the Reduction of Limonitic Nickel Ore by Hydrogen @article{deAlvarengaOliveira2020KineticSO ...

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Mineralogical Characterization of Limonitic Laterite from ...

2020-9-13  The contribution of laterite nickel ore to global nickel production has increased from less than 10% in the 1950s to over 50% today [20, 21]. Laterite nickel ores are generally divided into limonitic, saprolitic, and transition layers with significant

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

Recovery of nickel and cobalt as MHP from limonitic ore leaching solution: Kinetics analysis and precipitate characterization. Zaki Mubarok. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 34 Full PDFs related to this paper. READ PAPER.

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Gypsum utilization on selective reduction of limonitic ...

The results indicate that gypsum can provide a selective effect on the direct reduction process of laterite nickel ore. A selective effect that lowers the grade of iron can occur due to the formation of iron sulfides. The use of 12% gypsum was able to produce a product with Ni grade of 4.13%, Ni recovery of 91.81%, and selectivity factor of 5.72.

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

2018-12-27  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

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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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Thermodynamic analysis of selective reduction of ...

2015-7-23  The nickel sulphide ore deposits are becoming more expensive to mine, and increasing attention is being paid to the recovery of the nickel from the nickeliferous laterite ore deposits. In contrast to the sulphide ores, these oxide ores cannot be

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

2018-4-3  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

Read More
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