nickel ore is the highest dehydroxylation process compared to other lateritic nickel ore types. It occurs at temperatures of 261­270°C, while the removal of the hydroxyl group in the limonite nickel ore occurs at a temperature of 400­600°C.12) The removal of hydroxyl groups in chlorite (Fe,Mg,Al) 3-(Si,Al) 2O 5(OH) 4 starts at 602°C and ...

Separation of nickel and iron from lateritic ore using digestion-roasting-leaching-precipitation 569 As result, significant amounts of nickel, cobalt and iron were transformed to metal sulfate forms, which can be leached in water easily. However, it is known that the iron content of the final nickel product must be as low as possible.

A nickel laterite ore is a nickelifcrous ore, and comprises nickel, iron, magnesium and silica. The ore may also contain other elements, for example, one or more of cobalt, manganese, zinc, copper, chromium and aluminum. As discussed above, nickel laterite ore bodies generally have a limonite ore zone with about 1.2-1.7% nickel, about 40% iron ...

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 …

The smelting of ferronickel using lean nickel ores usually starts with roasting (calcining) of the ore mixture with limestone (~one third of the ore), anthracite (~1/10 of the ore amount), and recycled dust. Roasting is carried out in rotary kilns (~3 m in diameter, ~75 m in length, with a hot zone length of 9 to 12 m in the case of lean ore ...

There was a slight improvement in nickel extraction when the ore was roasted. The average percentage extraction of nickel from 3 experimental runs was 19.25%±0.19 at 100oC, 3M NH 3, 2M (NH 4) 2 CO 3, and 5 bar oxygen pressure. Some part of nickel in the ore was unextractable due to association of nickel with

Abstract In this study, magnesia–nickel silicate ore was investigated, which contained 0.83% Ni and antigorite, chlorite, magnetite (Fe3O4), quartz, and mica as the main minerals. Chloride roasting and magnetic separation were used to treat the ore. The addition of red mud enhanced the transformation of nickel silicate to a strongly magnetic mineral mainly …

Nickel ore is mainly divided into copper-nickel sulfide ore and nickel oxide ore, and their beneficiation and processing methods are completely different. The main method for beneficiation of copper-nickel sulfide ore is flotation, while magnetic separation and gravity separation are usually auxiliary beneficiation methods .

The limonitic nickel laterite ore is beneficiated by the selective reduction roasting-magnetic separation process. • The mechanism of calcium sulfate and silica in promoting selective reduction of limonitic nickel laterite ore was revealed. • Growth behaviors of ferronickel particles in the reduction roasting process are clarified.

Separation and recovery of iron and nickel from low‒grade laterite nickel ore using reduction roasting at rotary kiln followed by magnetic separation technique. Mining, Metallurgy & …

The production of ferronickel concentrate from low-grade nickel laterite ore containing 1.31% nickel (Ni) was studied by the non-melting reduction magnetic separation process. The sodium chloride was used as additive and coal as a reductant. The effects of roasting temperature, roasting duration, reductant dosage, additive dosage, and grinding time …

enriching the nickel content of the ore. This is com-monly carried out by magnetic separation, Sotation, or a combinationof both after the ore is comminuted to below 200 m in size. The enrichment depends upon the degree of rejection of the other sulRde and non-sulRde gangue. The maximum grade of nickel achieved by Sotation is around 28% Ni.

The chloridization and reduction roasting of high-magnesium, low-nickel oxide ore containing 0.82 pct Ni and 31.49 pct MgO were investigated in this study. Mineralogical investigation indicated that 84.6 pct of nickel was …

International Nickel (INCO) and Sherritt Gordon use a bulk Cu/Ni float pictured below, followed by selective flotation of the two elements into separate concentrates. Other Canadian producers leave separation to the smelters. Flotation of a Copper/Nickel Ore Containing Pyrrhotite is …

separation of low-grade nickel laterite ore to produce high nickel concentrate q li1, y c ui 2, d zhu3, j zhu4, j pan5, h zhang6 and g zheng6 abstract

Nickel is upgraded by 17% and 36% for ore S and I, respectively. There is no change in the nickel grade of ore L using the Falcon, similarly to what was obtained using the magnetic separation. The XRD analysis of the light fraction of the Falcon concentrator for the ore S and I samples is presented in Fig. 4. It seems that both particle size ...

Oxidized ores of nickel typically have a low nickel content and contain substantial quantities of silicate compounds, which complicates the ores' high-temperature leaching and subsequent thickening and filtration. The article presents results from laboratory studies of two samples of ore from the Kulikov group of deposits. Preliminary separation of the ore into …

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.

Solid-liquid separation is carried out by Counter-Current Decantation (CCD). There are various ways of purifying the nickel containing solution and separating nickel and cobalt. In modern plants such separation is carried out by solvent extraction (SX). Final products produced are electro-nickel, nickel oxide or nickel briquettes.

Co and Mg as well as in pregnant leach solution of nickel laterite ore in nitric acid solution which has been subjected to iron removal is studied. The extractant used are Cyanex 272 and a combination of Versatic 10 and Cyanex 272. A critical factor such as the effect of nitrate concentration to the effectiveness of nickel and cobalt separation is

Highlights Selective reduction and magnetic separation was conducted on low grade nickel laterite ore. High grade nickeliferous concentrate could be produced from these laterite ores. The addition of calcium sulphate promoted nickel concentration. Nickel was mainly concentrated into a γ Fe–Ni phase in the reduced ore. Calcium sulphate improved the growth …

Laterite ore is one of the important sources of nickel (Ni). However, it is difficult to liberate Ni from ore structure during reduction roasting. This paper provided an effective way for a robust recovery of Ni from laterite ore by H2 reduction using sodium thiosulfate (Na2S2O3) as a promoter. . It was found that a Ni content of 9.97% and a Ni recovery of 99.24% were achieved with 20 wt ...

In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% MgO, and 37.86% SiO2 was collected in the Mojiang area of China. Garnierite was the Ni-bearing mineral; the other main minerals were potash feldspar, forsterite, tremolite, …

We claim 1. A process for treating beneficiated ores and/or ore concentrates containing nickelferous sulfide minerals and cupriferous sulfide minerals both of which are associated with iron sulfides corresponding to the formula Fe x S x +1 wherein x is a whole number greater than 1, wherein the mineral treated contains at least 5% by weight of pyrrhotite and the nickel and …