Leaching of limonitic nickel from Sorowako with sulfuric …
Limonitic nickel ore samples were dried in an oven for 24 hours at a temperature of 120 o C. 2. 1.2. Sieve analysis. The s ample that was used for the sieve analysis was the sample that had been ...
اقرأ أكثر
Enhanced extraction of nickel from limonitic laterite via …
There are two types of lateritic nickel oxide ores - silica-magnesium based saprolitic ore and goethite based limonitic ore with nickel grade of 1.8%–4.0% and 0.8%–1.8%, …
اقرأ أكثر
Gypsum utilization on selective reduction of limonitic laterite nickel
First, limonitic laterite nickel ore, coal, gypsum, and limestone are crushed and sieved to 50 mesh size. Then, the crushed raw materials were tested using Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) and X-Ray Diffraction (XRD), while coal was examined by using a proximate analysis. The briquetting begins by mixing the raw ...
اقرأ أكثر
Review on comprehensive utilization of nickel laterite ore
Ilyas et al.(2020) conducted studies on carbon thermal reduction roasting-ammonia leaching of limonitic nickel laterite ore in Bajaur, Pakistan, carrying out selective reduction with a coal blend ratio of 10 %, temperature at 800°C, addition of 9 % Na 2 SO 4, and roasting for 120 min, followed by leaching nickel and cobalt in NH 4 OH-(NH 4) 2 ...
اقرأ أكثر
Kinetic Studies of the Reduction of Limonitic Nickel Ore by …
In the present paper, we present kinetic studies about the reduction of a limonitic nickel laterite ore by hydrogen at different temperatures (400 °C < T < 800 °C). The mineral …
اقرأ أكثر
Thermal upgrading of nickel from limonite by means of
The appropriate basicity type in selective reduction of limonitic ore was 0.3 of ternary basicity (BT1) and 0.2 of quaternary basicity (BQ1), which had a similar nickel grade and recovery, i.e., 6 ...
اقرأ أكثر
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 a …
اقرأ أكثر
Fathan Bahfie
Effect of modified basicity in selective reduction process of limonitic nickel ore. F Nurjaman, AS Handoko, F Bahfie, W Astuti, B Suharno. Journal of Materials Research and Technology 15, 6476-6490, 2021. 17: 2021: Effect of binary basicity (CaO/SiO2) on …
اقرأ أكثر
Effect of modified basicity in selective reduction process of limonitic …
DOI: 10.1016/j.jmrt.2021.11.052 Corpus ID: 244437487; Effect of modified basicity in selective reduction process of limonitic nickel ore @article{Nurjaman2021EffectOM, title={Effect of modified basicity in selective reduction process of limonitic nickel ore}, author={Fajar Nurjaman and Anton Sapto Handoko and Fathan Bahfie and Widi Astuti and Bambang Suharno}, journal={Journal of …
اقرأ أكثر
(PDF) 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 ...
اقرأ أكثر
Open Access proceedings Journal of Physics: Conference …
Nickel consists of two types of common ores, sulfides and laterite ores. Laterite nickel ore, which comprises 73% of the world's proven nickel reserves is the dominant source of nickel. However, only 42% of the world's production of nickel comes from laterite nickel ore …
اقرأ أكثر
Extraction of Nickel and Cobalt from Sulawesi …
The leaching behavior of metals from a nickeliferous limonitic laterite ore was investigated by high pressure acid leaching process for the extraction of nickel and cobalt.
اقرأ أكثر
DIRECT REDUCTION OF NICKEL LATERITE LIMONITIC …
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 …
اقرأ أكثر
Difference of sintering performance of different types of limonitic …
With the type of limonitic nickel laterite transformed from high-gangue to low-gangue nickel ore, tumble index and productivity are improved from 45.87% and 0.97 t m−2 h−1 to 50.16% and 1.05 t m−2 h−1, respectively, and solid fuel rate is reduced from 140.52 to 131.13 kg/t, indicating that the low-gangue nickel ore possesses relatively ...
اقرأ أكثر
High pressure acid leaching of a refractory lateritic nickel ore
Leaching temperature, leaching duration, sulfuric acid to ore weight ratio and particle size of the limonitic nickel laterite ore were studied. Optimum parameters determined as 255 o C, 0.30 sulfuric acid to ore weight ratio, a particle size of −850μ, 1 h of leaching duration with 30% w/w. 87.3% of Ni and 88.8% of Co in the ore extracted into the PLS but, …
اقرأ أكثر
(PDF) Atmospheric Leaching of Nickel Laterites with …
Minerals Engineering, 2011. This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite ore from the Gördes region of Manisa in Turkey.
اقرأ أكثر
Preparing Fe-Cr-Ni alloy by utilization of limonitic nickel …
In this paper, sinter samples of limonitic nickel laterite were adopted for Fe-Cr-Ni alloy preparation at lower costs. Based on the thermodynamics analysis, smelting characteristics of sinter samples of S1 (4.84 wt% Cr2O3) and S3 (7.72 wt% Cr2O3) were revealed by the optimization of smelting process parameters. When smelting durations were kept at 60 min and …
اقرأ أكثر
Transformation mechanism and selective leaching of nickel …
The limonitic laterite ore contains two main components: fine granular particles (lizardite) and rod-like crystal (goethite). Meanwhile, EDS analysis shows that it contains other …
اقرأ أكثر
Enhanced extraction of nickel from limonitic laterite via …
1. Introduction. Nickel is a hard, ductile and ferromagnetic metal that is utilized in a variety of applications including stainless steel, alloy steel, batteries, and electroplating (Ilyas et al., 2020, Lei et al., 2020, Ma et al., 2020).As economically available nickel sulfide resources become increasingly depleted, laterite, which is low grade and technically difficult to treat, is …
اقرأ أكثر
XRF chemical analysis of limonitic nickel laterite …
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 ...
اقرأ أكثر
Production of ferronickel from limonitic laterite ore using …
Laterite ore is a well-known raw material, where Ni and Fe exist as oxides. It can be diversified into limonite, saprolite, and garnierite, particularly with respect to the depth from the earth's surface, the characteristics, and average chemical composition, as exhibited in Table 1 (N.W. Brand et al., 1998).Limonitic laterite exists near to earth surface with low Ni content …
اقرأ أكثر
Recent Progress in Hydrometallurgical Processing of Nickel Lateritic Ore
An investigation on the reduction roasting and ammonia leach methods of treating lateritic nickel ore (Caron process showed satisfactory extractions for limonitic ore, i.e., material high in iron oxides and low in silicates) is reported . The Caron leaching method works with oxide laterites ("limonite") that can tolerate some silicate ...
اقرأ أكثر
Thermodynamic Analysis of the Selective Reduction of a …
Nickeliferous limonitic laterite ores are becoming increasingly attractive as a source of metallic nickel as the costs associated with recovering nickel from the sulphide ores increase. Unlike the sulphide ores, however, the laterite ores are not amenable to concentration by conventional mineral processing techniques such as froth flotation. One potential concentrating method …
اقرأ أكثر
An investigation into the distinctive sintering performance …
Limonitic nickel laterite, an iron-rich nickel ore [3, 4], possesses rich reserves accounting for 60% of total lateritic nickel ore resources and has been imported more and more to China because of the export limitation of high-grade lateritic nickel ore [5, 6]. Efficient utilization of limonitic nickel laterite becomes increasingly important ...
اقرأ أكثر
Dissolution kinetics of dehydroxylated nickeliferous goethite …
The increased demand for nickel has depleted the more easily extractable Ni sulphide deposits, which account for ~ 30% of the world's Ni resource, and has caused the mining industry to look towards acid extraction of lateritic nickel (accounting for ~ 70% of the world's Ni resource).Difficulties in the extraction of Ni from lateritic nickel ore may partly reflect the limited …
اقرأ أكثر
Recovery of nickel and cobalt as MHP from limonitic ore …
During sulfuric acid leaching of limonitic ore, nickel, cobalt, iron, manganese and other acid soluble minerals are dissolved. The pregnant leach solution (PLS) usually contains iron ions in high concentrations due to the existence of nickel within goethite (FeOOH) matrix. Hence, the iron removal stage must be applied before the leach liquor is ...
اقرأ أكثر
Selective leaching of nickel and cobalt from limonitic …
Laterite ore has become the main source of nickel production due to the fast consumption of nickeliferous sulfide ore. Pyrometallurgical processing is known to be a widely applied technology for the treatment of laterites (with a portion about 70%) to produce ferronickel (Maragkos et al., 2009, Warner et al., 2007).In general, for producing nickel-rich alloy, saprolitic …
اقرأ أكثر
Study of selective reduction in lateritic nickel ore: Saprolite …
DOI: 10.1016/J.MATPR.2020.11.687 Corpus ID: 234120589; Study of selective reduction in lateritic nickel ore: Saprolite versus limonite @article{Nurjaman2021StudyOS, title={Study of selective reduction in lateritic nickel ore: Saprolite versus limonite}, author={Fajar Nurjaman and Widi Astuti and Fathan Bahfie and Bambang Suharno}, journal={Materials …
اقرأ أكثر
High pressure acid leaching of a refractory lateritic nickel ore
Heat treatment of the limonitic nickel laterite ore prior to leaching has shown that goethite present in the ore had fully transformed to hematite and after this transformation a tremendous decrease in the nickel and cobalt extractions was observed. Therefore, in order to dissolve the nickel and cobalt present in the difficult to leach hematite ...
اقرأ أكثر
Reduction of Carbon Footprint Through Hybrid Sintering of …
In this paper, low-grade limonitic nickel laterite and chromite were synergistically utilized via the hybrid sintering process (i.e., pellet-sintering process) for high-quality Ni–Cr sinter preparation and great carbon emission reduction. Under the optimum process conditions, Ni–Cr sinter indices were substantially improved in the pellet-sintering process. Tumble index and …
اقرأ أكثر