(PDF) Factors Affecting the Upgrading of a …
process, particularly with the limonitic ores, is the formation of magnetite, which will contaminate the ferronickel concentrate, thereby …
A Thermodynamic Study of the Reduction of a …
One possible solution is to selectively reduce the nickel oxide in the ore, which could then be upgraded by, for example, magnetic concentration. In this article, a thermodynamic study was performed on the reduction of a …
Effects of temperature, CO content, and reduction time on the …
DOI: 10.1016/j.mineng.2021.107277 Corpus ID: 242033593; Effects of temperature, CO content, and reduction time on the selective reduction of a limonitic laterite ore @article{Sun2021EffectsOT, title={Effects of temperature, CO content, and reduction time on the selective reduction of a limonitic laterite ore}, author={Ning Sun …
Factors Affecting the Upgrading of a Nickeliferous …
The most common method for treating limonitic ores is High Pressure Acid Leaching (HPAL), although other leaching methods have …
Efficient Utilization of Limonite Nickel Laterite to …
However, the RKEF process is mainly suited to treating nontronite and saprolite laterite ores to achieve ferronickel with a high Ni content, whereas relatively few studies have reported on this process to …
Evolution of ferronickel particles during the reduction of
The method of producing ferronickel at low temperature (1250–1400°C) has been applied since the 1950s at Nippon Yakin Kogyo, Oheyama Works, Japan. Limestone was used as an additive to adjust the slag composition for lowering the slag melting point. The ferronickel product was recovered by means of a magnetic separator from semi …
Understanding the effects of goethitic iron ore
Plant downtime and underutilisation. Goethite present in iron ore deposits affects how your mine manages the handling and processing of ore. Failing to understand how the different textural composition of goethite impacts …
Reduction roasting and bioleaching of a limonite ore
In the current work, a novel process was devised by applying pyrometallurgical and bio-hydrometallurgical operations. The experimental set-up …
Removal of Phosphorus from Lisakovsky Iron Ore by a
Process oriented characterisation of oolitic iron concentrate during dephosphorisation by roasting and leaching. Krassimir Ionkov O. Gomes R. Neumann S. Gaydardzhiev Armando Corea de Araujio. Materials Science. 2016. Phosphorus in iron ores is considered as a deleterious component to iron making reflecting in cold shortness of the produced steel.
De-qing ZHU | Professor (Full) | PhD | Central South University
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.
(PDF) Advanced Review on Extraction of Nickel from Primary and
Flowsheet of Caron's process for processing of high iron limonitic laterite ores (Caron, 1950). ... upgrade the metal content with 10 ... Roas ted calcine of a sulphidic nicke l-iron ore.
Significant influence of self-possessed moisture of limonitic nickel
Limonitic nickel laterite imported from Philippines is identified as a refractory iron ore for sintering due to its rather lower iron grade of only 45.09 mass%, higher LOI (loss on ignition) of 12.49 mass%, and extensive gangue minerals, including 5.70 mass% SiO 2, 4.50 mass% Al 2 O 3 and 5.58 mass% MgO. Ferronickel tailing is a solid waste ...
Beneficiation of a low-grade, hematite-magnetite ore in China
8. In China, most reserves of rich iron ores have now been depleted and sustainable development of low-grade iron ores has become a critical discussion topic in the mining industry today. The aim of this study was to evaluate the applicability of beneficiating a low-grade, hematite-magnetite ore (assaying 18.64% Fe) for subsequent …
Improving Sintering Performance of Limonitic Nickel Laterite
As shown in Table III, the nickel laterite used is a typical limonitic nickel laterite from the Philippines with total iron, nickel, and chromium grades of 45.09%, 0.56%, and 2.36%, respectivelypared with ordinary iron ores (i.e., the mainstream iron ores used for sintering), limonitic nickel laterite possesses a much lower iron grade, a higher …
Facile and inexpensive preparation method of iron phosphate …
Currently, limonitic nickel laterite ore is one of the major sources for extracting Ni and Co. Limonitic laterite ores usually contain large amounts of Fe exceeding 40% [[1], [2], [3]]. At present, the primary technology to treat limonitic laterite ores is high-pressure acid leaching (HPAL) with sulfuric acid, which produces 0.9 t leach residue ...
Extraction of Nickel, Cobalt, and Scandium from Low-Grade
In this study, reduction pre-treatment is conducted prior to the atmospheric leaching of limonitic laterite ore to produce a nickel-cobalt-scandium-rich leach solution and iron-rich magnetic residues. The leaching of pre-treated ore resulted in higher recovery of Ni, Co, and Sc when compared to the yield from the leaching of untreated ore.
Iron Ore Distribution in India | Types of Iron Ore
Iron Ore in Karnataka. Iron ores are widely distributed. High grade ore deposits are those of Kemmangundi in Bababudan hills of Chikmagalur district and Sandur and Hospet in Bellary [Lot of Mining Mafia]. Most of the ores are high grade haematite and magnetite. Iron Ore in other states. Andhra Pradesh (1.02%): Kurnool, Guntur, …
Valuable metals substance flow analysis in high-pressure
The annual treatment capacity of laterites by HPAL process is 321×104 t, and 300×104 t of high-pressure leaching residue, 10×104 t of sulfate residue, 1.6×104 t of iron and aluminum residue, and 0.08×104 t of acid leaching residue are discharged every year. Nickel, cobalt, and manganese are used as the raw materials for the preparation of ...
9
Abstract. This chapter introduces the principle of how low-grade iron ores are upgraded to high-quality iron ore concentrates by magnetic separation. Magnetite is the most magnetic of all the naturally occurring minerals on earth, so low-intensity magnetic separators are used to upgrade magnetite ores. On the other hand, because oxidized …
Reduction of Carbon Footprint Through Hybrid Sintering of
Table 1 indicates that limonitic nickel laterite contains much lower iron grade, higher loss on ignition (LOI) and more high-smelting components such as Cr 2 O 3, Al 2 O 3 and MgO compared with the conventional iron ores. Chromite contains 21.68% total iron and 40.56% Cr 2 O 3 with the mass ratio of Cr/Fe of only 1.28, which is …
An investigation into the distinctive sintering performance and
Limonitic laterite ore assaying 0.86% Ni and 3.45% Cr 2 O 3 is characterized by high iron grade of 45.09% and high gangue mineral contents including SiO Sintering performance In this study, the effects of anthracite dosage, sinter mix moisture and basicity on the sintering performance of limonitic nickel laterite were investigated to ...
Factors Affecting the Upgrading of a Nickeliferous Limonitic …
Limonitic ores are typically processed by hydrometallurgical leaching methods in order to avoid the high costs associated with dehydrating, heating and smelting of a large volume of relatively low grade ore. In some cases, limonitic ores may be smelted in a blast furnace to produce nickel pig iron, although this is an energy intensive
Limonite Siderite Iron Ore Beneficiation
Limonite Siderite Iron Ore Beneficiation. A laboratory mineral-dressing investigation was conducted by the Federal Bureau of Mines on four limonitic and four sideritic iron ores from the North Basin of the east Texas iron-ore district. The samples, composited from drill cores, were considered representative of the iron-ore reserves of …
Yuxiao XUE | Central South University, Changsha | CSU | School …
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.
Sintering characteristics of fluxes and their structure
Sintering characteristics of common fluxes and sintering blending ores, such as mineralization capacity, liquid generation capacity, consolidation strength, were examined to master the behavior and effect of fluxes in sintering. Based on fundamental studies, sinter pot tests were carried out to obtain the principles of optimizing the sinter flux structure. …
A Robust Recovery of Ni From Laterite Ore Promoted …
where R N i / F e is the nickel or iron recovery rate, and m 1 and m 2 are the elemental nickel or iron contents in the concentrate and the reduced samples, respectively.. Analysis and Characterization. The main …
Magnetic Susceptibility
Because the crystal water in limonitic ores will report to the iron ore concentrate in magnetic separation, the iron ore concentrate grade is limited to about 52% Fe. ... Figure 9.17 shows an example of a flow sheet to upgrade a limonitic ore. The ore is mainly composed of limonite and quartz with a grade of about 40% Fe.
Mineralogical Characteristics of Iron Ores in Joda and …
4. Ore types. Iron ore textures are complex due to deformation, alteration and supergene processes. Microstructural and textural features observed include microfolds, breccia, microfaults and microbands. The iron ores were classified into hard massive, flaky-friable, blue dust and lateritic ores .
Factors Affecting the Upgrading of a Nickeliferous Limonitic …
The chemical analysis of the dried limonitic ore is provided in Table 1. The dried ore had a nickel oxide content of 1.48%, a very high iron content (58.71%) and low concentrations of magnesia (MgO), silica (SiO 2) and alumina (Al 2 O 3), which are typical of the nickeliferous limonitic ores. X-Ray Diffraction (XRD) analysis identified goethite ...