Preconcentration strategies in the processing of nickel laterite …
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 ...
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(PDF) Beneficiation of Low-Grade Laterite Nickel by …
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.
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Carbothermic Reduction of Nickeliferous Laterite Ores for …
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 …
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Pre-concentration of nickel in laterite ores using physical separation
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 …
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Effective Separation and Beneficiation of Iron and …
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 …
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Improved beneficiation of nickel and iron from a low …
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 …
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Upgrading low nickel content laterite ores using
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 ...
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Nickel Laterite Beneficiation and Potential for
This review summarizes the latest nickel laterite upgrading studies reported in the literature which use physical beneficiation – only studies reported after the most …
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Efficient recovery of iron and chromium from laterite …
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.
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High-Grade Ferronickel Concentrates Prepared from …
This work provides guidance for effectively exploiting and utilizing low-grade laterite nickel ore to produce high-grade ferronickel concentrate with low energy …
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Efficient recovery of iron and chromium from laterite …
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.
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Upgrading low nickel content laterite ores using selective …
The laterite briquettes were reduced at temperatures between 900 °C and 1250 °C to determine the effect of temperature on nickel concentration. Fig. 1 shows the nickel and iron enrichment in the concentrate as a function of reduction temperature. The data shows that when the reduction temperature was increased from 1000 °C to 1100 °C, …
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(Open Access) Nickel production from low-iron laterite …
In 2011, the nickel production in China amounted to 446 kilotons, with the proportion of electrolytic nickel and nickel pig iron (NPI) registering 41.5% and 56.5%, respectively. NPI is a low-cost feedstock for stainless steel production when used as a substitute for electrolytic nickel.
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BENEFICIATION OF LOW GRADE IRON ORE FINES BY MAGNETIZING ROASTING
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.
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An Overview of Nickel Utilization from Laterite Ore
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 …
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Nonmolten state metalized reduction of saprolitic laterite …
The newly generated fayalite was the primary reason for the low iron recovery. Meanwhile, a small amount of sporadically embedded ferronickel in the tailings was responsible for the loss of iron and nickel. The proposed innovative technology can realize nonmolten metalized saprolitic laterite ores and effective beneficiation of nickel …
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Beneficiation of nickeliferous laterite by reduction roasting …
Ni beneficiation of laterite ore by using direct reduction process is proposed. Sodium sulfate is capable of intensifying the reduction roasting of laterite. Average particle size of ... Nickel production from low-iron laterite ores: process descriptions. CIM Bulletin, 96 (1072) (2003), pp. 127-138. View in Scopus Google Scholar. Chen, 2010 ...
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Recent Progress in Hydrometallurgical Processing of Nickel …
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.
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Mineralogical Characteristics of the Nickel Laterite, …
With the sharp decrease of sulfide nickel resources, the nickel laterite is becoming more attractive as nickel oxide, nickel matte, and nickel-iron. This study investigated the mineral phase structure, chemical analysis, thermal properties, and element distribution characteristics of the rotten rock layer deposited in the Southeast …
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An Overview of Nickel Utilization from Laterite Ore
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 …
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Relationship between process mineralogical …
Abstract: 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
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Nickel Laterite Beneficiation and Potential for Upgrading …
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 …
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Laterite nickel hydrometallurgical residues characterization …
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.
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Beneficiation aspects of low-grade unutilized materials …
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 ...
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Beneficiation of Low-Grade Bauxite: A Case Study of
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 ...
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Effective Separation and Beneficiation of Iron and
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 ...
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Upgrade of nickel and iron from low-grade nickel …
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.
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Metallurgical Beneficiation of Iron Laterite Ores with the …
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 …
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Beneficiation Aspects to Improve the Quality of Bauxite …
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 ...
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Metallurgical Beneficiation of Iron Laterite Ores with the …
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 …
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