Low-grade saprolite nickel laterite, characterized by complicated minerals composition and fine-grained and complex dissemination, was commonly treated with a low recovery efficiency of Ni and Fe by conventional methods. Hence, an improved direct reduction and magnetic separation process was proposed. Meanwhile, the mechanisms on the …
In this paper, the process of solid-state metalized reduction and magnetic separation was investigated for preparation of nickel–iron concentrate from a low-grade …
For the bottom saprolitic nickel laterite ore, it is difficult to concentrate nickel and iron through physical beneficiation due to its low nickel and iron content and the highly distributed ...
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 …
Iron Recovery Technology from Copper Processing Plants ... Thermal Beneficiation of a Nickel Laterite Ore from the Obi Island of North Maluku, Indonesia Using Corncob Char as Reductant ... Coal-based reduction mechanism of low-grade laterite ore. Trans. Nonferrous Met. Soc. China. 23(2013) 3428-3433. DOI: 10.1016/s1003-6326(13)62884-8.
In this paper, the reduction roasting of laterite ore in the absence or presence of sodium sulfate was carried out for nickel beneficiation by wet magnetic separation. Sodium sulfate is found to be capable of enhancing the reduction of laterite ore through liberating iron and nickel from Ni/Fe substituted-lizardite, as well as increasing the size of ferronickel particles considerably. When …
(DOI: 10.1007/S12594-019-1199-4) The consumption of iron ore has increased rapidly over the past decade due to the tremendous growth of iron and steel industry. The depletion of high grade iron ore resources make it inevitable to utilize the existing low grade iron ores/fines/tailings with effective beneficiation to meet the present specification and demand. …
A novel method for the beneficiation of limonitic Ni laterites. • Long-term oxalic acid leaching of a low-grade Ni laterite ore from Iran. • A dissolution-precipitation behavior for Ni in contrast to leachability of Fe. • Fast dissolution for Ni and Fe but delayed precipitation for Ni at high temperature. •
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 and iron.
This comprehensive review explores various beneficiation techniques for low-quality iron ore, focusing on conventional methods including comminution, froth flotation and …
Nickel production from low-iron laterite ores: Process descriptions; Open Access Journal Article. ... the reduction roasting of laterite ore in the absence or presence of sodium sulfate was carried out for nickel beneficiation by wet magnetic separation, and the average particle size of ferronickel grains was approximately 50μm.
2. Nickel oxide ore (Nickel laterite) beneficiation. Most of the nickel oxide ore exists in the form of nickel laterite, with low silicon and magnesium content, and the nickel content is 1~2%. Secondly, it is mainly nickel silicate ore, with high silicon and magnesium content, low iron content, and nickel content of 1.6~4%.
The mineralogy of a low-grade saprolitic nickel laterite ore was studied and the effect of sodium carbonate and calcium carbonate on the enrichment of nickel and iron as concentrate from this ore ...
The PLK contains high silica, iron oxide, low alumina and resembles the characteristics of alumino-silicate materials. In general, laterite is originated from various rocks and comprises iron oxide, silica and alumina bearing minerals. The beneficiation studies have been done on PLK and laterite (ferruginous, aluminous, siliceous) indicated ...
3. Beneficiation Studies on Laterite and PLK The Country¶s abundant low-grade resources (PLK, low grade bauxite and laterite) are characterized by high iron oxide, silica and low alumina content, which restrict their use in metallurgical as well as non-metallurgical applications. Thus, any beneficiation process which
Manufacturer of Beneficiation Equipment - Laterite Iron Ore Processing Plants, Vibrating Table, Alumina Ore Beneficiation Plant and Ball Mill offered by Star Trace Private Limited, Chennai, Tamil Nadu. ... Low maintenance – …
Keeping in view the improvement in quality of low-grade materials, beneficiation studies have been carried out at JNARDDC. The PLK contains high silica, iron oxide, low alumina and …
Investigations were carried out, to establish its amenability for physical beneficiation on a low grade siliceous iron ore sample by magnetic separation. Mineralogical studies, with the help of microscope as well as XRD, SEM–EDS revealed that the sample consists of magnetite, hematite and goethite as major opaque oxide minerals where as quartz and …
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 ...
BENEFICIATION OFLOW GRADE LATERITES FOR THE PRODUCl'ION OF ALUMINA S. 1. ALl and ~loHMI.MAD A~fJ:.Yortlz Regional Laboratories, Pakistan Council of Scientific and Industrial Research, Peshaicar (Recei ved October 22, 1966) Beneficiation of low grade laterite ores has been investigated by (i) soda-sintering process, (ii) soda-
The beneficiation of laterite nickel ore by chemical beneficiation processes such as acid leaching is the beneficiation direction of laterite nickel ore. ... high limonite content and low ...
Beneficiation studies were carried out using laboratory model wet high intensity magnetic separator (WHIMS) supplied by Box Mag Rapid, England (Rao, 2016). The objectives of the studies are to remove the silica as well as iron phases present in laterite sample.
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.
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.
[32][33][34][35] Laterite nickel ore, as a kind of low basicity, low grade and refractory ore, also has the problems of low metal yield and high energy consumption in the smelting process.
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 product, and the magnetic …
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 ...
Depleting iron ore reserves coupled with increasing demand for low-alumina iron ore fines to improve blast furnace performance in terms of productivity and reduced slag rate necessitate intensive beneficiation of iron ore. The sample was collected from Barsua iron ore mine assaying 40% Fe, 9.48% SiO2 and 19.97% Al2O3. In order to produce the pellet grade …
Photomicrographs of goethite-laterite iron ore (a) Gibbsitic clay (reddish black) bounded by goethite (grayish white), characteristic of lateritic ore (b) joint and fracture surface along which ...
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 prolonged grinding …
Of particular importance are markers in the mineralogy of the flotation concentrate that inform beneficiation strategies to improve concentrate grades, increasing both the marketability and cost of refining. ... Yang, C.; Guo, Z.; Xue, Y. Improved beneficiation of nickel and iron from a low-grade saprolite laterite by addition of limonitic ...
nature and do not meet the quality norms for iron and steel making [2, 3]. Upgrading low-grade iron ores is becoming an attractive proposition today. The most commonly used beneficiation methods for iron ores are the gravity and magnetic separation techniques [4−6]. Gravity separation is widely used in mineral bene-
Present investigation includes the magnetizing roasting of low-grade iron ore fines followed by grinding and beneficiation using magnetic separation. The hematite iron ore used in the investigation contains 53.17% T Fe, 10.7% SiO2, and 4.5% Al2O3. Powdered bituminous coal of 210 μm size with an ash content of 12.5% and fixed carbon of 54.25% was used as …