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Nickel Ore Reduction by Hydrogen and Carbon Monoxide

A two step process for pyrometallurgical nickel-ferronickel production is proposed. In the first step a part of nickel is selectively reduced at minimum reduction potential and at a low temperature to avoid iron reduction and dissolution into the nickel.

Reduction process of low-grade nickel laterite

The agglomeration process is a good alternative to work lateritic nickel ores, considering that reduction is more effective when fine particles are reduced through a diffusion process whereby the reducing agent passes through the particles ore.

(PDF) Advances in research on nickel production through

Oct 23, 2008 The Caron process involves a reduction-roasting step, during which the ore is roasted at 750°C to produce a Ni(Co)-Fe metallic alloy. Afterwards, the reduced ore is leached with an ammonia

Direct Nickel Process Breakthrough Technology

CARON PROCESS • CARON PROCESS • Ore Drying and Grinding • Reduction Roast • Ammonia Leach • Output: MSP, Nickel metal, NiO, Ni (CO 3) 2, CoS •

(PDF) Advanced Review on Extraction of Nickel from Primary

Jan 10, 2019 Processing options for various types of nickel ore and their products (Adapted from Crundwell et al., 2011). High-pressure acid leaching (HPAL) process flowsheet operating at

Two-stage reduction for the preparation of ferronickel

the chemical composition of the nickel laterite ore, reductant, and flux used in this study. 2.2. Experimental setup The pre-reduction process was typically carried out in an 8-kW muffle furnace equipped with a silicon carbide heat-ing element and a Pt–10wt%Rh/Pt thermocouple for moni-toring the temperature. The pre-reduction reaction was con-

Mechanism of sodium sulfate in promoting selective

Sep 10, 2013 A high nickel grade ferronickel was produced from laterite ore using the selective reduction-wet magnetic separation process, with the addition of sodium sulfate (Na 2 SO 4).The ferronickel concentrate assaying 9.87% Ni, with a nickel recovery of 90.90% can be obtained, when laterite ore was reduced at 1200 °C for 50 min with the addition of 10 wt.% Na 2 SO 4 and 2 wt.% coal.

Proses Reduksi Selektif Bijih Nikel Limonit Menggunakan

The selective reduction process was carried out at temperature range of 800 1100 °C, 1-4 h of reduction time, and the addition of the reducing agent and additives 5% 20%. Limonite nickel ore was prepared by heating the ore inside the oven, size reduction and sieving to get ore

Selective Reduction of Laterite Nickel Ore

to 1300°C, the phase of saprolitic nickel ore changes into a complex mineral. The mineral is dominated by olivine (Mg 0.5Fe 0.5) 2SiO 4. 29) 2.3 Direct reduction of laterite nickel ore in industrial scale Most laterite nickel ore processing is carried out using Elkem process. The Elkem process

What Is Nickel Smelting? (with picture)

Feb 13, 2021 The other process is chloride-hydrogen reduction, in which the liquid matte is kept around 1,742° F (950° C) until a reaction occurs from the heat and the liquid matte turns into just nickel. After the nickel smelting is complete, and the nickel has cooled, it

Selective Reduction of Laterite Nickel Ore

Therefore, a novel method to process laterite nickel ore using lower energy is needed. The novel method is done via direct reduction and magnetic separation. In laterite nickel processing by direct reduction, the challenges are to conduct selective reduction of nickel and to let iron unreduced. The addition of additive in the direct

Optimal conditions for selective reduction process of

A low-grade nickel laterite ore from Indonesia was selected to investigate the effect of temperature and time of reduction upon the extraction of nickel through the selective reduction-magnetic separation process to produce the ferronickel. The nickel ore was mixed with5 wt.% of anthracite coal and 10 wt.% of sodium sulfate additive.

Thermodynamic analysis of the reduction process of

Thermodynamic analysis of the reduction process of Colombian lateritic nickel ore Sandra C. Díaza,*, Adriana Garcésa, Oscar J. Restrepob, Misael A. Larac, Jesús E. Camporredondod aUniversidad Nacional de Colombia, Facultad de Minas, sede Medellín, Carrera

Nickel Wikipedia

Nickel is obtained through extractive metallurgy: it is extracted from the ore by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on the impurities.

Direct Nickel Process Breakthrough Technology

CARON PROCESS • CARON PROCESS • Ore Drying and Grinding • Reduction Roast • Ammonia Leach • Output: MSP, Nickel metal, NiO, Ni (CO 3) 2, CoS •

US2473795A Reduction of ores containing nickel Google

US2473795A US534878A US53487844A US2473795A US 2473795 A US2473795 A US 2473795A US 534878 A US534878 A US 534878A US 53487844 A US53487844 A US 53487844A US 2473795 A US2473795 A US 2473795A Authority US United States Prior art keywords ore reduction furnace gases gas Prior art date 1944-05-10 Legal status (The legal status is an assumption and is not a legal

nickel Ore SlideShare

Jan 28, 2016 The existing deposit of COB ore in the Sukinda valley has been estimated to he around 140 million tonnes. Process for Nickel Enrichment- COB ore of Sukinda valley is a high silica matrix. Present nickel enrichment process consists of primarily three stages. Neutralisation Stage I : Digestion with acid/ Combination of acids, HCI, HNO3 and H2SO4.

Lateritic nickel ore deposits Wikipedia

This ore is so rich in limonite (generally grading 47% to 59% iron, 0.8 to 1.5% nickel and trace cobalt) that it is essentially similar to low-grade iron ore. As such, certain steel smelters in China have developed a process for blending nickel limonite ore with conventional iron ore

Reduction process of low-grade nickel laterite

The agglomeration process is a good alternative to work lateritic nickel ores, considering that reduction is more effective when fine particles are reduced through a diffusion process whereby the reducing agent passes through the particles ore.

Phase transformation of nickel laterite ores in the

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.

Study of selective reduction in lateritic nickel ore

The raw materials, such as nickel ore, bituminous coal, and sodium sulfate, were crushed into -100 mesh. It was mixed homogenously and pelletized into10-15 mm of diameter. The reduction process was carried out in a muffle furnace at 950 °C to 1250 °C for 60 min.

Processing of Nickel Laterite Ores on the Rise

Lateritic Nickel Ore Processing. While sulfide nickel ores are processed via upgrading to concentrates and then smelting, this approach is not applicable to laterite ores. A variety of approaches are available to process nickel laterite ores, with the most prevalent approaches explained below.

Factors Affecting the Upgrading of a Nickeliferous

The nickel reduction degree varied from 19% to 70%, and the reduction process was concluded after 40 min. The reducibility of nickel oxide increased with increasing temperature and the iron content of the ore. The magnesia and silica in the ore combined together to form olivine ((Mg,Fe,Ni)2SiO4), and Ni2+ was substituted for Mg2+ in the

Enhanced methods for nickel recovery from low-grade ores

The recovery of nickel from low-grade ores is increasingly more important, from new techniques of pressure oxidation of the concentrate in an autoclave to bioleaching of the nickel in the ore, it is evident that time and money are being put into researching these processes.

Reduction of Nickel and Iron from Low-Grade Nickel

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. The reduction process employed a gaseous reductant, which contained CH 4 and N 2. This was metered into the reactor using a mass flow meter. The reduction procedure involved flushing the tube with nitrogen prior to

(PDF) Mathematical Modeling of Nickel Ores Pre-Reduction

In the context of this paper are presented the results of the research dependence of mineralogical and metallurgical parameters determining the degree of pre-reduction of nickel ores, during simulation laboratory furnace “Linder”, according to the

THE EFFECT OF ADDITIVES AND REDUCTORS IN SELECTIVE

The addition of 10% sodium sulfate additives by weight in the reduction process of laterite nickel ore produced higher concentrations of nickel as 6.09%, compared to no additives, i.e. 2.45%. The addition of reductors in the selective reduction process of laterite nickel ore shows that the higher the amount of reductors causes a decrease in the

US2473795A Reduction of ores containing nickel Google

US2473795A US534878A US53487844A US2473795A US 2473795 A US2473795 A US 2473795A US 534878 A US534878 A US 534878A US 53487844 A US53487844 A US 53487844A US 2473795 A US2473795 A US 2473795A Authority US United States Prior art keywords ore reduction furnace gases gas Prior art date 1944-05-10 Legal status (The legal status is an assumption and is not a legal

Processing of Nickel Laterite Ores on the Rise

Lateritic Nickel Ore Processing. While sulfide nickel ores are processed via upgrading to concentrates and then smelting, this approach is not applicable to laterite ores. A variety of approaches are available to process nickel laterite ores, with the most prevalent approaches explained below.

Phase transformation of nickel laterite ores in the

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.

Selective reduction of nickel laterite ores Allis

A process for extracting nonferrous metals from nickel laterite ore by a selective reduction treatment that causes the nonferrous metal oxide components of the ore to be reduced but effects substantially only partial reduction of the iron oxide components, and a subsequent hydrometallurgical treatment by which the nonferrous metals are leached

nickel Ore SlideShare

Jan 28, 2016 The existing deposit of COB ore in the Sukinda valley has been estimated to he around 140 million tonnes. Process for Nickel Enrichment- COB ore of Sukinda valley is a high silica matrix. Present nickel enrichment process consists of primarily three stages. Neutralisation Stage I : Digestion with acid/ Combination of acids, HCI, HNO3 and H2SO4.

Lateritic nickel ore deposits Wikipedia

This ore is so rich in limonite (generally grading 47% to 59% iron, 0.8 to 1.5% nickel and trace cobalt) that it is essentially similar to low-grade iron ore. As such, certain steel smelters in China have developed a process for blending nickel limonite ore with conventional iron ore

Extraction of Nickel Nickel Ore Mining Mining

Mar 20, 2019 Extraction of Nickel. This paper introduces the extraction of nickel process and characteristics of laterite nickel ore dressing, highlights the nickel ore crushing, washing in the nickel production process design.. 1 Description of nickel ore. The laterite nickel ore is complex in composition and can be roughly divided into two types: limonite type and silicon magnesium-nickel type.

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

Upgrading nickel content of limonite nickel ore through

Apr 03, 2018 Limonite nickel ore has potency to utilize as raw material for ferronickel or nickel matte, since it has low grade nickel content, thus process development is needed to find the acceptable process for upgrading nickel.