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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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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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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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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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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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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In this paper, an innovative method is proposed to upgrade iron and remove phosphorus from high-phosphorus oolitic hematite ore by the sodium magnetization roasting–magnetic separation ...
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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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In this paper, an effective method was developed to remove phosphorus and upgrade iron from high phosphorus oolitic hematite ore by high temperature flash reduction—a wet magnetic separation process. A thermodynamic analysis of iron and phosphorus mineral reactions and experiments with Fe-P separation process were …
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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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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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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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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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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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Oolitic iron ores are a distinctive subset of iron ore deposits, and are characterised by their spherical grains composed of concentric layers containing …
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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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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 ore applications is prohibitively high and there is a lack of quantitative references for microwave irradiation parameters.
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One ninth of China’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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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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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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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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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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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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Phase Analysis of Iron Iron in Hematite Iron in Magnetic Iron in Siderite Iron in Sulfide Iron in Silicate Total Content 40.97 0.54 0.37 0.13 0.19 42.21 Distribution rate 97.09 1.28 0.88 0.31 0.45 ...
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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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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. …
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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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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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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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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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