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Utilization of limonitic nickel laterite to produce

Feb 01, 2019· 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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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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Selective Reduction of Laterite Nickel Ore

Limonitic nickel ore contains iron oxide in the form of goethite (¡-FeO·OH). 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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A Study on Classification of Limonite and Saprolite from

Nowadays, RKEF and sintering-blast furnace gradually become the primary processes for saprolite laterite (Ni>1.5 wt.%) and limonitic laterite ore(0.8∼1.2 wt.% Ni, Fe>40 wt.%) to produce ferro

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(PDF) Reducibility of nickeliferous limonitic laterite ore

Limonitic nickel laterite from Sivrihisar reserve in Turkey was reduced at 700–1100°C by the addition of 5·74, 8·61 and 11·48 wt-% coal under an argon atmosphere.

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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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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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(PDF) Reducibility of nickeliferous limonitic laterite ore

Limonitic nickel laterite from Sivrihisar reserve in Turkey was reduced at 700–1100°C by the addition of 5·74, 8·61 and 11·48 wt-% coal under an argon atmosphere.

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A Study on Classification of Limonite and Saprolite from

Nowadays, RKEF and sintering-blast furnace gradually become the primary processes for saprolite laterite (Ni>1.5 wt.%) and limonitic laterite ore(0.8∼1.2 wt.% Ni, Fe>40 wt.%) to produce ferro

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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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v117n7a11 Laboratory-scale smelting of limonitic laterite

Laboratory-scale smelting of limonitic laterite ore from Central Anatolia by S. Pournaderi*, E. Keskinkılıç†, A. Geveci‡, and Y.A. Topkaya‡ $ 79/5;5 The feasibility of ferronickel production from a low-grade limonitic laterite ore was investigated. The ore was

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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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Leaching behavior of metals from a limonitic nickel

Abstract The leaching behavior of metals from a limonitic laterite was investigated using a sulfation–roasting–leaching process for the recovery of nickel and cobalt. The ore was mixed with water and concentrated sulfuric acid followed by roasting and finally leaching with water. Various parameters were studied including the amount of acid added, roasting temperature and time, sample

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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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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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US4062924A Reductive leaching of limonitic ores with

A process is provided for extracting iron values as soluble ferrous salts from a limonitic ore which comprises leaching the ore in an acidic medium in the presence of a reducing agent, the reducing agent being a sulfide. Non-ferrous metal values are also extracted from the ore and they may be selectively separated from the solubilized iron salts.

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PAPER OPEN ACCESS The kinetic study of limonitic low grade

Apr 07, 2020· 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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Reductive leaching of limonitic ores with hydrogen sulfide

A process for treating a limonitic ore comprising metal values soluble in acidic leach media, said soluble metal values including a major amount of iron in the ferric state and a minor amount of nonferrous metal value being selected from nickel and cobalt, to extract iron as a soluble ferrous salt and to extract quantitatively said nonferrous

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Kinetika dan Mekanisme Pelindian Limonit : Pengaruh Waktu

The effect of temperatur and time were studied at various temperatures of 30, 50, and 90 °C with leaching time up to 480 minutes. A maximum 95% Ni extraction value was obtained for 480 min leaching at 90 °C from -150+200 mesh of limonitic nickel ore, with a concentration of H2SO4 of 1 M and a 2.5% ore

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Thermodynamic Analysis of the Selective Reduction of a

Nickeliferous limonitic laterite ores are becoming increasingly attractive as a source of metallic nickel as the costs associated with recovering nickel from the sulphide ores increase. Unlike the sulphide ores, however, the laterite ores are not amenable to concentration by conventional mineral processing techniques such as froth flotation.

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