Direct Reduction Nickel Ore

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 …

A Review of Direct Reduction–Magnetic Separation Process …

This paper aims to fill these gaps by presenting the current state of thermal treatment and magnetic separation processes for ferronickel production through the direct …

Upgrade of nickel and iron from low-grade nickel laterite by …

In this study, an improved direct reduction and magnetic separation process was proposed by addition of low-nickel concentrates as nucleating agent combined with low quantity of composite additive to upgrade the nickel and iron from low-grade nickel laterite.

Preparation of Nickel–Iron Concentrate from Low-Grade Laterite Nickel

In this paper, the process of solid-state metalized reduction and magnetic separation was investigated for preparation of nickel–iron concentrate from a low-grade laterite nickel ore. The effects of reduction temperature, reduction time, amount of dosages, and magnetic field strength on grades and recoveries of nickel and iron were studied. The results showed …

Selective Reduction of Laterite Nickel Ore

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. ... This article will further review the role of additive used in selective reduction of laterite nickel ore and the current trends on ...

Selective reduction of nickel from lateritic ore using …

The selective reduction of nickel and adequate growth of ferronickel grains are imperative for efficient preparation of ferronickel from nickeliferous laterite ore via the process of direct ...

Effects of direct reduction process on the microstructure and reduction

A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate ...

Review on comprehensive utilization of nickel laterite ore

The direct leaching of nickel laterite ore offers the advantage of a high nickel leaching rate. However, it also results in the leaching of iron, which complicates the recovery of nickel and cobalt from the leaching solution.

Selective reduction of nickel from lateritic ore using …

Direct reduction of nickel laterite limonitic ore using a coal-dolomite mixture bed and Na2SO4 as a selective agent

Effects of direct reduction process on the microstructure and reduction

A coal-based direct reduction process was used to reduce the nickel laterite ore under a constant C: O ratio (1.2: 1) and reduction time (90 min). The effect of basicity and reduction temperature on microstructure and reduction characteristics and of carbon-bearing nickel laterite ore pellets was investigated.

Vale and Midrex to cooperate in the use of iron ore …

Currently, most direct reduction plants use iron ore pellets as a feedstock. Vale's briquette production process represents an alternative to the pelletizing process with lower production costs, lower investment intensity, and approximately 80% less CO2 emission. Through direct reduction technology, Direct Reduction Iron (DRI) is produced.

[PDF] DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC …

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 …

A Review of Direct Reduction–Magnetic Separation Process …

This paper aims to fill these gaps by presenting the current state of thermal treatment and magnetic separation processes for ferronickel production through the direct reduction of nickel laterite ores, followed by subsequent magnetic separation (DRMS).

Direct reduction of low grade nickel laterite ore to produce

In this study, low grade nickel laterite ore was processed by means of isothermal-temperature gradient method to produce ferronickel nugget. The ore and coal as reductant …

Pilot scale test of producing nickel concentrate from low …

Separation and Recovery of Iron and Nickel from Low-Grade Laterite Nickel Ore Using Reduction Roasting at Rotary Kiln Followed by Magnetic Separation Technique

Review on comprehensive utilization of nickel laterite ore

The direct leaching of nickel laterite ore offers the advantage of a high nickel leaching rate. However, it also results in the leaching of iron, which complicates the recovery …

Effects of direct reduction process on the microstructure and …

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.

[PDF] DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC ORE …

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.

Selective Reduction of Laterite Nickel Ore | Request PDF

The feasibility of a coupled process to prepare ferronickel and cementitious materials by the direct reduction of laterite nickel ore and gangue calcination, respectively, is discussed under ...

Efficient enrichment of nickel and iron in laterite nickel ore …

The process of deep reduction and magnetic separation was proposed to enrich nickel and iron from laterite nickel ores. Results show that nickel–iron concentrates with nickel grade of 6.96%, nickel recovery of 94.06%, iron grade of 34.74%, and iron recovery of 80.44% could be obtained after magnetic separation under the conditions of reduction temperature of …

High-Grade Ferronickel Concentrates Prepared from Laterite Nickel Ore …

Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex composition, resulting in difficulty in upgrading the nickel content using physical separation methods. In this study, high-grade ferronickel concentrates were obtained through …

Effects of direct reduction process on the microstructure and reduction

A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore.The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated. The results show that the metallization rate of iron and the compressive strength …

Selective reduction of nickel from lateritic ore using Na2SO4 …

Direct reduction of nickel laterite limonitic ore using a coal-dolomite mixture bed and Na2SO4 as a selective agent

Separation and recovery of iron and nickel from low-grade …

The magnetic separation efficiency of nickel from the laterite ore was evaluated using the recovery ratio of nickel R ni using the formula: (1) R Ni = m Ni × β Ni M Ni × γ Ni × 100 % where m Ni is the mass of the magnetic product, g; β Ni is the nickel content in the magnetic product, wt.%; M Ni is the mass of the reduction product, g ...

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 of low grade nickel laterite ore to produce

In this study, low grade nickel laterite ore was processed by means of isothermal-temperature gradient method to produce ferronickel nugget. The ore and coal as reductant were ground to obtain the grain size of less than 0.25 mm and 0.425 mm, respectively.

Direct reduction of low grade nickel laterite ore to produce

Differential reduction behaviors of nickel and iron …

The generation of α-(Fe,Ni) indicated the reduction of nickel and iron components, while the formation of (Mg,Fe) 2 SiO 4 was associated with the dehydroxylation of lizardite [28], [30], [45]. Increasing reduction temperature facilitated the reduction of laterite ore, which was proved by the enhanced intensity of diffraction peaks of α-(Fe,Ni).

THE DNi PROCESS™

The DNi Ni Process™ is a unique technology which can process the full laterite ore profile (limonite, saprolite, and transition zone) with nitric acid, and which extracts all the metals contained in the feed. Boasting a 99% nitric acid recovery rate, our DNi Ni Process™ minimises environmental impact. The resulting residue, mainly silicates ...