Leaching of nickel laterite ore at atmospheric pressure is a leaching method that can be operated at >100⁰C temperatures in an atmospheric pressure, which is …
The limonitic laterite ore was obtained from Papua New Guinea and dried at 105 °C for 24 h. The amounts of metal elements (iron, magnesium, aluminum, chromium, nickel, cobalt, and manganese) within the limonitic laterite ore were determined after total digestion with a mixture of acids, including hydrofluoric acid (HF), hydrochloric acid …
The success of the sulfation-roasting-leaching process depends on iron behavior. Due to its higher amount, it is sulfated before nickel. However, the stability of iron sulfates is lower than the nickel sulfate and during the decomposition of iron sulfate, the sulfur xide (SO 3) is liberated and reacts with nickel to form nickel sulfate.This …
The leaching mechanism of laterite nickel ore in acidic solution was studied by comparing the XRD patterns of different leaching residues and raw ore to observe any changes in characteristic peaks. The leaching temperature, acid concentration, and leaching time as important parameters for the leaching process …
A kind of leaching residue generated during high pressure acid leaching of laterite nickel ore is creatively prepared as blast furnace charge for ironmaking. Results show that the …
The related results showed that 98.7% of nickel and 89.8% of cobalt were leached from the roasted limonitic laterite ore (at 400 ℃ for 60 min) under the optimized leaching conditions (phosphoric acid concentration of 3 mol/L, leaching temperature of 90 ℃, leaching time of 180 min, and liquid/solid ratio of 10 mL/g).
1. Introduction. The acid-leaching tailings of laterite nickel ore are a hazardous waste generated by the laterite nickel ore industry [1], [2], [3].As global demand for nickel continues to rise and nickel sulfide resources decrease, the extraction of nickel resources from laterite nickel ores the main development trend of the global nickel …
Some experimental studies also described that effect of ultrasound pretreatment on nickel leaching using A.niger 95% nickel could be leached along with 12.5% of iron from laterictic ore . Behera et al. [ 54 ] evaluated that 18% of nickel was recovered from pretreated Indian chromite (FeCr2O4) in shake flasks using the …
An alternative laterite nickel ore processing using sulfuric acid as a leaching agent to produce class 1 nickel as a raw material for electric vehicle batteries produces natrojarosite residue as a ...
The leaching behavior of nickel and iron in limonite-type laterite nickel ore was studied through ammonium hydrogen sulfate atmospheric leaching. The leaching temperature, ammonium bisulfate concentration, reaction time, and acid excess rate during the nickel dissolution process were optimized using the response surface methodology …
Highlights 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 …
To effective use the residual acid in the pregnant solution, two steps AL process were proposed. For the leaching solution of limonite ore, reactive nickel laterite ores with high-magnesia could be utilized as neutralizer to compensate the acid cost, and the iron in the liquor could be precipitated as jarosite.
The lateritic nickel ore sample taken from the Çaldağ (Manisa, Turkey) was used in this study. The chemical analysis of the ore as carried out using PerkinElmer-OPTIMA8300 inductively coupled plasma spectroscopy (ICP) and Thermo Fisher- QUANT'X EDXRF X-Ray fluorescence spectroscopy (XRF) is given in Table 1.The mineralogical …
High-pressure acid leach (HPAL) residue from laterite nickel ore is a potentially valuable resource for ironmaking; however, its efficient utilization is hindered by its high sulfur content. In this study, an effective and straightforward method is proposed for sulfur removal from HPAL residue. The process involves sieving and sodium carbonate …
HL is an industrial process, and ore is left for steady-state operation at ambient temperature. The process has low recovery, with ~ 68–71% nickel extraction. The heap leach operation prefers a low ratio of limonite to saprolite ore . Two commercial operations were reported for HL in the …
Nickel and cobalt recovery from a low-grade nickel laterite ore, supplied from Çaldag deposit (Manisa, Turkey) were investigated by bio and chemical leaching processes. The fungus, Aspergillus niger was used for biocatalytic leaching experiments.
Various approaches for nickel leaching process have been proposed, such as heap leaching, alkali leaching, ... × 100 where C L,M,DES is the concentration of each metal M in DES phase after leaching, w M,Ore is the weight of each metal M in ore added to the glass vial, V is the volume of the leaching agent.
This research aims to study two-stage iron precipitation behavior as a part of the purification process of pregnant leach solution of nickel limonite ore obtained from high-pressure acid leaching (HPAL) at 240°C and to investigate the effect of several variables of the extraction of scandium from the precipitate re-leaching at atmospheric ...
The aims of the present work were to investigate the leaching characteristics of Sc in two different types of laterite nickel ore from Indonesia during atmospheric acid leaching. Based on the leaching results, the kinetics and mechanism of Sc dissolution from limonitic and saprolitic laterite material, especially the relationship and ...
A characteristic feature of serpentine oxidized nickel ores (ONO) of the Serov deposit (≈ 1 wt.% Ni) is the increased content of iron and magnesium. The main nickel-containing phases are lizardite, antigorite, clinochlore and iron oxides with the nickel content varying from 1.6 to 9.2 wt.%.Heap (percolation) leaching with aqueous H2SO4 …
Nitric acid pressure leaching process (NAPL) uses nitric acid as the leaching medium to produce cobalt and nickel raw materials. Based on the benefits of nitric acid pressure leaching process for laterite ore, this paper proposes a process of "nitric acid pressure leaching-neutralization precipitation-reductive ammonia leaching separation".
Key Terms. ore leaching: The process of recovering metals from ores by using a number of different techniques.; Microbial ore leaching (bioleaching) is the process of extracting metals from ores with the use of microorganisms. This method is used to recover many different precious metals like copper, lead, zinc, gold, silver, and nickel.
Laterite ore is a valuable resource due to its high content of metals essential for modern technology, including nickel, iron, and cobalt. However, extracting nickel from laterite ores is challenging due to their complex mineral composition and low nickel concentrations. This study examined the leaching behavior of pre-roasted laterite ore …
However, the acid-leaching tailings of laterite nickel ore (LTLNO), which contain valuable iron resources, have not been cost-effectively recovered. In this work, we designed a novel method to extract iron from LTLNO and recycle it into high-valuable iron phosphate products using only phosphoric acid and iron powder. We explored the effects of ...
In general, the hydrometallurgical process of sulfide ore including the heap leaching 12, acid leaching 13, and ammonia …
Interestingly, another patent was filed by Outotec Oyj in the same year for a chloride leach process for treatment of nickel sulfide ore and concentrates, key differences in this process were the absence of a non-oxidative leaching step, copper(II) was precipitated from the leach liquor as atacamite (Cu 2 (OH) 3 Cl) which was returned to …
In this process, the leaching of a nickel laterite ore generates a pregnant leach solution containing more than 10–30 g/L Fe(III) that is used for the leaching nickel sulphide ore either sequentially or simultaneously. …
The leaching kinetics study shows that nickel extraction from limonite ore by a mixture of 2 M sulfuric acid and 0.5 M citric acids is controlled by diffusion through solid product layer, while the nickel extraction from saprolite ore by a mixture of 0.5 M sulfuric acid and 2 M citric acid is controlled by interface reaction with activation ...