The studies carried out on laterite (ferruginous, aluminous, siliceous) and low-grade bauxite indicated that the ore can be upgraded with relevance to reduction in iron oxide, silica and ...

This work provides guidance for effectively exploiting and utilizing low-grade laterite nickel ore to produce high-grade ferronickel concentrate with low energy …

With increasing temperature to 650°C low structure is increased, the polarity of bond increases, 218 Research Article Iran. J. Chem. Chem. Eng. Beneficiation of Low-Grade Laterite Nickel ... Vol. 37, No. 3, 2018 Fig. 8: SEM images of laterite sample, Before (Right) and after (Left) during 60 minutes calcination at 750°C.

Laterite ores are not amenable to concentration by physical beneficiation methods because of their complex mineralogy.2,6 Due to the inability to produce a high-grade concentrate, ... It is uneconomic to process laterite ore with high iron content and low nickel content via the RKEF route. The RKEF process was first used in the …

Of particular importance are markers in the mineralogy of the flotation concentrate that inform beneficiation strategies to improve concentrate grades, …

Approximately 80% of the hydrometallurgical process of low-grade laterite nickel ore is converted into residue. The handling of residues from processing is a significant challenge in this process According to the characterization test, each type of extraction process produces a different type of residue.

The studies carried out on laterite (ferruginous, aluminous, siliceous) and low-grade bauxite indicated that the ore can be upgraded with relevance to reduction in iron oxide, silica and ...

The majority (about 70%) of the world's nickel resources occur as laterite ores which are often complex and low grade, and therefore expensive to treat using conventional methods (Xu et al., 2013). ... Principles and Application in Beneficiation of Iron Ores. Iron Ore, NML, Jamshedpur (2007), pp. 89-102. Google Scholar. Dehaine et …

The nickel laterite in upper layer of the ore deposit, with higher content of iron (Fe) and lower content of silica (SiO 2) and magnesium (Mg) in general, belongs to the limonite type, and usually contains lower nickel of about 1%, but a certain amount of cobalt (Co), while the nickel laterite in lower layer of the ore deposit, with higher content of …

mineral powders (such as iron ore concentrates and limo-nitic laterite ore) as nucleating agents for the growth of ferronickel particles, which can contribute to the recycling of nickel from low-grade nickel laterite [29, 30], but it is difficult to obtain the products with high-grade nickel because of the high Fe/Ni of nucleating agents.

The utilization of laterite sulfuric acid leach residue has always been a challenge in the metallurgical industry. The current treatment involves deep-sea landfills, which leads to considerable environmental pollution and resource wastage. In this work, an effective method is proposed to recover iron and chromium from sulfuric acid leach residue. The …

Lei et al. [5] reported the metallic iron separation from laterite sulfuric acid residue containing 3.71% sulfur and 44.62% iron by reduction roasting in the temperature range of 800-1400 °C. The ...

Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite, serpentine and chromite was studied on the basis of process mineralogy. The results show that the low-grade laterite nickel ore is a typical weathering sedimentary metamorphic …

The beneficiation studies carried out on representative samples of Goa laterite with an aim to reduce iron and silica content as well as enrichment of alumina. It comprises techniques such as ...

ABSTRACT. Australia has large reserves of limonite and clay-based laterites that are currently underutilized. This review summarizes the latest nickel laterite upgrading studies reported in the literature which use physical beneficiation – only studies reported after the most recent review in 2015 included – as well as high-temperature methods …

Laterite an overview ScienceDirect Topics. Laterite carry enriched grade of Fe,Al,Mn,Ni,Cu,Ti,and V.Lateritic cover can turn in to lowgrade iron,aluminum,nickelcopper and gold deposits with the increase of metal content.Geochemical studies of laterite have been successfully used in exploration for NiCu and gold deposits in Western Australia …

The chromium and iron content in NAPL laterite residue could reach 2.0 wt% and 60.0 wt%, respectively, which is a good resource of chromium and iron [10,12,13]. However, the laterite residue was deposited in most nickel hydrometallurgical industries, which didn't cause resources waste, but damaged the environment seriously.

To improve beneficiation of nickel and iron from low-grade saprolite laterite with 1.29 wt.%Ni and 16.31 wt.%Fe, co-reduction with limonitic laterite ore and basicity optimization were adopted as ...

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.

Of all these techniques, sizing was the most successful means of beneficiation of laterite ores. ... Beneficiation tests of a low-grade serpentinic iron–nickel–chromium–cobalt ore in a dense liquid. A. Roberts (Ed.), Mineral Processing, Pergamon Press (1965), pp. 323-331. Google Scholar.

DOI: 10.1021/acssuschemeng.0c00219 Corpus ID: 213779281; Effective Separation and Beneficiation of Iron and Chromium from Laterite Sulfuric Acid Leach Residue @article{Lei2020EffectiveSA, title={Effective Separation and Beneficiation of Iron and Chromium from Laterite Sulfuric Acid Leach Residue}, author={Meng Lei and Bao …

The large volume of slag and the low temperature of molten iron in BF cause difficult separation of slag and iron, due to the low grade of iron in laterite ores. Especially in the smelting of saprolitic laterite ore with low iron content (15–30 wt% TFe) and high magnesium (15–25 wt% MgO) content, the huge amount of smelting slag and …

As high-grade iron ore deposits are gradually being depleted, more difficult-to-process ores such as goethite-rich, low-grade iron ores and tailings are now being processed. These ores often contain impurities and require some form of beneficiation in order to achieve the typical grades required for sale to downstream steel producers.

The low-grade nickel laterite ore used in this study was successfully upgraded through selective reduction by industrialized rotary kilns followed by magnetic separation. The results indicated that both iron metallization extent and nickel metallization extent showed obvious linear correlation. In addition, rational roasting temperature and …

Abstract A new process is developed for metallurgical beneficiation of iron laterite nickel-containing (limonite) ores with the formation of a metallic nickel–cobalt concentrate. This process includes reducing roasting of the ores with sulfur-containing additions in the temperature range 1100–1200°C, the fragmentation of the roasting …

Effect of reductant addition on the grade and recovery of nickel and iron with 3% calcium sulphate addition (Li, et al., 2010).Li et al. (2011) studied the reduction of nickel laterite ore while ...

China mainly imports laterite from the Philippines, of which 50% is limonite laterite with very low nickel content (about 0.8% Ni), high iron grade (about 40%), and crystal water content [8]. ...

Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite, serpentine and chromite was ...

A new process is developed for metallurgical beneficiation of iron laterite nickel-containing (limonite) ores with the formation of a metallic nickel-cobalt concentrate. This process includes reducing roasting of the ores with sulfur-containing additions in the temperature range 1100-1200°C, the fragmentation of the roasting product, and the magnetic …

The stainless-steel industry is the primary driver of nickel demand and uses both class 1 and 2 (lower purity) nickel. Class 2 nickel from nickel laterite ores can be converted to nickel sulfate; however, it requires high-pressure acid leaching. Much of the laterite ore comes from the Philippines, Indonesia, and New Caledonia.

A limonitic laterite sample from Sarchahan deposit (Fars province, Iran) containing 0.8% Ni and 27.3% Fe was used for the experiment and dissolution behavior of nickel and iron during the course of long time leaching runs (52 h) was studied under the influence of temperature (60–90 °C) and oxalic acid concentration (0.75–1.25 M).

The beneficiation studies have been done on PLK and laterite (ferruginous, aluminous, siliceous) indicated that the ore can be upgraded with relevance to reduction in iron …

In China, most iron ores are low grade (<33%), complex in phase structure and combined closely between iron and gangue minerals, which causes iron ores difficult for beneficiation, ... In the laterite residue, iron existed in the form of hematite. The content of chromium and silica is 1.23% and 1.66%, respectively.

Compared with nickel sulfide ore, nickel laterite ore has the characteristics of low nickel content and complex mineralogy, and most of nickel is present as isomorphism hosting in the lattice of some stable mineral phases (Butt and Cluzel, 2013), such as serpentine and goethite, leading to difficulty in the physical beneficiation of nickel ...

Especially in the smelting of saprolitic laterite ore with low iron content (15–30 wt% TFe) and high magnesium (15–25 wt% MgO) content, the huge amount of …

To improve beneficiation of nickel and iron from low-grade saprolite laterite with 1.29 wt.%Ni and 16.31 wt.%Fe, co-reduction with limonitic laterite ore and basicity optimization were adopted as strengthening measures in this paper with better …

It performs low iron grade (41.88%) and high silica and aluminum oxide contents (18.47% and 9.46%, respectively). Around 54.74% of size distribution belong to -325 mesh fraction. Limonite iron mineral dominates in the ore in the range of 80-90% with water content of about 40%. Proven deposits of laterite iron ore are about 222 million tons.