beneficiation of oolitic iron ore

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Amenability for processing of oolitic iron ore concentrate …

The oolitic gravity magnetic (GM) iron concentrate was supplied by the Lisakovsky iron ore beneficiation plant in Kazakhstan. The plant flowsheet involves ore sieving at 1.6 mm and desliming with further processing through gravity (jigging) and magnetic (low and high intensity) separation stages.

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Mechanism of phosphorus removal in beneficiation of high …

A large number of studies have shown that oolitic hematite is an iron ore that is extremely difficult to utilize because of its fine disseminated particle size, high harmful impurity content and oolitic structure. ... Phase transformation during roasting process and magnetic beneficiation of oolitic-iron ores. Vacuum, Volume 146, 2017, pp. 63-73.

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Morphological and mineralogical characterizations of oolitic …

The morphological and mineralogical characterizations of a Chinese oolitic iron ore (Exi deposit) were studied by scanning electron microscopy and energy …

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A new iron recovery and dephosphorization approach from …

Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting–gas-based reduction (ORGR) and magnetic separation process was developed.The underlying …

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A new iron recovery and dephosphorization approach from …

Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting – gas-based reduction (ORGR) and magnetic separation process was developed. The underlying …

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Thermally assisted liberation of high phosphorus oolitic iron ore…

The high phosphorous oolitic iron ore used in this study was collected from the Aswan region of Egypt. The area east of Aswan represents the main manifestation of the Cretaceous oolitic ironstone bands of southern Egypt, which are confined to clastic successions belonging to the "Nubian" sandstones, or "Nubia facies" [6]. Fig. 1 and …

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A review on the characterisation and processing of oolitic …

The reduction of hematite to magnetite or metallic iron has been well documented over many decades and only selected references involving roasting of …

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Phase transformation during roasting process and magnetic …

Oolitic-iron ore material is one of the most important iron resources in China. However, due to its low grade of Fe, poor liberation of iron minerals and high …

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Studying on mineralogical characteristics of a refractory …

In this study, a high-phosphorus oolitic iron ore containing 44.70% Fe and 1.56% P from western Hubei of China was collected as the sample. The chemical composition, mineral composition, structure characteristics, dissemination characteristics, and iron and phosphorus occurrence state were carried out to investigate the …

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Research on efficient utilization of high-phosphorus …

which indicates that the ore is an acid iron ore [35]. To determine the state of iron within the ore, Table 2 presents the findings from the chemical phase analysis of iron. The primary iron states in the raw ore were identified as hematite and limonite, comprising 45.52% of the total iron content, with a distribution of 92.26%.

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Migration behavior of iron and phosphorus during gas …

Phosphorus removal of high phosphorous oolitic iron ore with acid-leaching fluidized-reduction and melt-separation process. ISIJ Int., 55 (9) (2015) ... Phase transformation during roasting process and magnetic beneficiation of oolitic-iron ores. Vacuum, 146 (2017), pp. 63-73, 10.1016/j.vacuum.2017.09.029.

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Green and efficient separation of iron and phosphorus from …

To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by reduction roasting, the feasibility of the high-efficiency separation of iron and phosphorus by reduction roasting and magnetic separation process (RRMSP) without a dephosphorization agent was studied. The results showed that the …

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BenefIciation of an Oolitic-Iron ORE by Magnetization …

Low-grade iron ores contain many impurities and are difficult to upgrade to make appropriate concentrates for the blast furnace (BF) or direct reduction (DR) technologies. In this study, the beneficiation of an Oolitic-iron ore (containing 45.46wt% Fe2O3) with magnetization roasting by non-coking coal (containing 62.1wt% fixed …

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Thermally assisted magnetic separation and

Recently, Omran et al. [12] studied the effects of conventional and microwave heating on the liberation of iron bearing minerals from a high phosphorus oolitic iron ore, where scanning electron microscope photomicrographs showed that intergranular fractures are formed between the gangues and hematite after the microwave treatment …

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Mechanism of phosphorus removal in beneficiation of high …

One ninth of Chinaâ€™s iron ore resources are oolitic hematite, in which 30âˆ'40 billion tons are high phosphorus oolitic hematite. ... YI et al [6] found that the reduction roastingâˆ'reverse flotation process was more effective in the beneficiation of oolitic hematite ore than the reverse flotation, and the concentrate with a ...

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Phase transformation in suspension roasting of oolitic …

Fig. 2 Optical image of oolitic iron ore 2.2 Methods The iron ore was roasted in a suspension roasting furnace designed by Northeastern University. The schematic diagram of suspension roasting furnace is shown in Fig. 3. The iron ore samples were crushed and ground to 80% passing 0.074 mm sieve pore size. A 40% H2−60% N2 gas mixture was …

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Utilization of low metamorphic degree bituminous coal in …

Study the reduction performance of low metamorphic degree YJL bituminous coal with abundant reserves in reducing high-phosphorus oolitic hematite.. The iron particles in the roasted product obtained from YJL bituminous coal as reductant were smaller and more dispersed, but the DRI indexes were similar to that of the DRI obtained from JS …

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Flotation Dephosphorization of High-Phosphorus Oolitic Ore

The feasibility of dephosphorization using the flotation process and its mechanism of high-phosphorus oolitic hematite were discussed in this paper. The results showed that phosphorus minerals mainly exist in the form of collophane, which can be divided into three types. Block collophane and band collophane could be effectively …

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Thermally assisted magnetic separation and

The experiments in WHIMS were carried out in order to understand the role of thermal treatment on the magnetic separation of the iron ore. Initially, the samples thermally treated at temperatures 500, 600, 700, and 800 °C for a fixed time interval of 30 min were undergone WHIMS at different magnetic intensities such as 0.77, 1.05, 1.18 …

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Phase transformation during roasting process and magnetic beneficiation

Oolitic iron ore [7], a type of refractory mineral resource, is being considered with great importance, because of its huge abundance and the increasing demand of iron ores globally. Oolitic ores contain particles with circling layers of iron minerals and gangue. Considering industrial cost, oolitic iron ores have not been commercially utilized ...

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Studying on mineralogical and petrological characteristics of …

Demand for iron ore worldwide has been steadily increasing which leads to the extraction of iron ore deposits with more complex mineralogies and higher levels of silicon and phosphorus impurities. This is the case in Algeria with the iron ore deposit of Gara Djebilet, Tindouf; where it has recently been exploited to ensure the sufficiency of …

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Beneficiation of an Oolitic-Iron Ore by Magnetization …

reducing iron ore from Fars mine by non-coking coal. To achieve that goal, the factors that may in-fluence magnetite production during the reduction of low-grade Oolitic-iron ore by non-coking coal were explored under a stream of argon gas. The main reason of using protective atmosphere is to prevent oxidation. The results of this research can

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Morphological and mineralogical characterizations of oolitic iron ore

The morphological and mineralogical characterizations of a Chinese oolitic iron ore (Exi deposit) were studied by scanning electron microscopy and energy-dispersive X-ray spectroscopy in this work. It is shown that the Exi ore is mainly composed of hematite, quartz, apatite, and chlorite. The hematite is present as the oolitic layers and …

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Studying on mineralogical characteristics of a refractory high

In this study, a high-phosphorus oolitic iron ore containing 44.70% Fe and 1.56% P from western Hubei of China was collected as the sample. The chemical composition, mineral composition, structure ...

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Mechanism of phosphorus removal in beneficiation of high …

High phosphorous oolitic hematite ore is one of typical intractable iron ores in China, and the conventional beneficiation methods are found to be impracticable to remove phosphorus from the ore ...

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Microscopic liberation mechanisms of oolitic iron ore under …

Microwave liberation is a promising method for beneficiation of oolitic hematite but has not been used in industrial production. This is because the specific microwave energy requirements for iron ...

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Beneficiation of Low-Grade Hematite Iron Ore Fines by …

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 …

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Phase transformation during roasting process and magnetic beneficiation …

The Fe mineral phase and its distribution (by chemical composition method and identification & analysis of ore-minerals) are shown in Table 2, where the main mineral phase is Hematite-Limonite which accounts for 91% of TFe.The recoverable Fe for this type of oolitic iron ore is mainly in the form of Magnetite and Hematite-Limonite, where a …

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Process mineralogy and characteristic associations of …

Lots of researches have been conducted aiming at the beneficiation of oolitic hematite ore, leading to various separation indexes [2, 6−11], which is mainly attributed to several …

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Effects of sodium salts on reduction roasting and Fe–P separation …

The microstructure of the sample is observed by an optical microscope (Fig. 1) and a scanning electron microscope equipped with an energy diffraction spectrum (SEM-EDS, Fig. 2).In Fig. 1, Fig. 2, it can be seen obviously that the unique concentric layered texture is formed in the oolitic hematite ore.The oolitic particle sizes are in the range of …

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Beneficiation of Oolitic Iron Ores

Accordingly, Hatch and Ironstone are developing a new pyrometallurgical process (Hatch Ironstone Chloride Segregation) to produce metallic iron from high silica and high …

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(PDF) Beneficiation of Oolitic Iron Ore Sourced …

Oolitic iron ore is one of the most important iron resources. This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic...

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Development of Technologies for High Phosphorus Oolitic …

With increasing consumption of iron ore over the world, new technology of beneficiation and smelting is more urgently needed than ever before to explore ores which, are difficult to utilise by ...

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Strengthening iron enrichment and dephosphorization of …

The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in China. In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting–leaching process was …

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Thermomagnetic Enrichment and Dephosphorization of Brown Iron Ore …

In this study, a high-phosphorus oolitic iron ore containing 44.70% Fe and 1.56% P from western Hubei of China was collected as the sample. The chemical composition, mineral composition, structure ...

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How to Extract Iron from Hematite: Methods and …

Coarse-grained hematite refers to iron ore with an embedded particle size of 2mm or more. It is easy to extract iron from this kind of haematite by using gravity separation and magnetic separation. …