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The gasification removal behaviour of phosphorus from high-phosphorus iron ore in the temperature range of 400–900 °C under H 2 reducing and N 2 atmosphere was …
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Effective phosphorus removal procedures from high-phosphorus iron ores are very likely to be ore-specific due to the significant variations in ore compositions, and to the presentation of phosphorus in the various high …
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A representative sample of a natural high-phosphorus iron ore was obtained from Aswan area, southern Egypt. The chemical analysis of the sample (Table 1), indicated that the main gangue minerals were silica (A.I.%) and phosphorus-bearing minerals (apatite). To obtain the maximum mineral liberation, the sample was first crushed by a jaw crusher ...
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This article attempts to contribute to answering these questions. We investigated the behavior of apatite in an unbeneficiated iron ore during hydrogen-based DR conditions. Magnetitic lump ore and preoxidized fines …
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Phosphorus is a major contaminant in steelmaking and current specifications for iron ore, the feedstock used in steelmaking, requires ores averaging less than 0.08% P (bulk). In Australia, …
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Key words: high phosphorus; iron ore; dephosphorus; selective leaching; hydrochloric acid; dephosphorization ratio China is rich in high phosphorus iron ores re- sources. The reserves of high phosphorus iron ore accounts …
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High-phosphorus oolitic hematite is a potential iron ore resource. China and Europe have 4・ billion tons and more than 14 billion tons of iron reserves, respectively.1・) Corresponding resources have also been reported in the United States and Egypt.
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Iron ores can be classified with respect to their phosphorus content as low-phosphorus ore (< 0.07% P), medium-phosphorus ore (0.07–0.10% P), or high-phosphorus ore (> 0.10% P) . High-phosphorus iron ores abound worldwide and constitute the …
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Effective phosphorus removal procedures from high-phosphorus iron ores are very likely to be ore-specific due to the significant variations in ore compositions, and to the presentation of phosphorus in the various high-phosphorus iron ores.
WhatsApp: +86 18221755073
This article attempts to contribute to answering these questions. We investigated the behavior of apatite in an unbeneficiated iron ore during hydrogen-based DR conditions. Magnetitic lump ore and preoxidized fines were used to …
WhatsApp: +86 18221755073
The high phosphorus iron ore is ground to a finer size fraction and beneficiated using the flotation process to remove unwanted phosphorus, alumina, silica, and alkalis (Na, K, etc.) and provide a super feed free from impurities for the blast furnace.
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Phosphorous is an undesired element present in iron ore used in the steel making process. It leads to an increase in overall production cost as well as deteriorated steel quality. The …
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Unbeneficiated magnetitic iron ore was used in this study; the relatively high phosphorus content facilitates the detection via scanning electron microscope with energy-dispersive X-Ray spectroscopy (SEM-EDS). ... That deviates from the XRD analysis in Table 1, in which koninckite, an iron phosphate occurs as phosphorus-bearing phase. However ...
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Phosphorus is a major contaminant in steelmaking and current specifications for iron ore, the feedstock used in steelmaking, requires ores averaging less than 0.08% P (bulk). In Australia, the majority of iron ore feedstock production is a blend of low-P (<0.05% P) hematite-rich ores and more common high-P (>0.10% P) goethite-rich ores.
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iron ore and reducing agent. This method can be employed as efficient pretreatment for the treatment of the high-phosphorus iron ore.16–19) Several studies have reported the mechanism for the carbothermal reduction of iron oxides. Fluorapatite is the major constituting phosphorus-bearing mineral in a high-phosphorous iron ore.20) In contrast, on
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The gasification removal behaviour of phosphorus from high-phosphorus iron ore in the temperature range of 400–900 °C under H 2 reducing and N 2 atmosphere was investigated by a thermodynamic consideration and the experiments were performed on the simulated iron ore.
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High-phosphorus oolitic hematite is a potential iron ore resource. China and Europe have 4・ billion tons and more than 14 billion tons of iron reserves, respectively.1・) Corresponding …
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In this study, we presented simultaneous enrichment of iron (Fe) and phosphorus (P) to recover P from high-phosphorus iron ore and clarified the migration of P from the …
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Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in colour from dark grey, bright yellow, deep purple, to rusty red. The iron itself is usually found in the form of magnetite (Fe 3 O 4), hematite (Fe 2 O 3), goethite, limonite or siderite.Hematite is also known as "natural ore".
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In this study, we presented simultaneous enrichment of iron (Fe) and phosphorus (P) to recover P from high-phosphorus iron ore and clarified the migration of P from the original apatite to reduced iron during the direct reduction process.
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With the present rates of iron ore consumption, currently unusable, high-phosphorus iron ore deposits are likely to be the iron ores of the future as higher-grade iron ore reserves are depleted. Consequently, the …
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Optical microscopy results from a polished cross section of the ore (Fig. 1) show the oolitic structure of the ore, composed of lighter spherical grains in concentric layers embedded in a darker matrix. The presentation of the ore is consistent with the structure of oolitic ores.
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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 mechanism was investigated …
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Calcium carbonate, renowned for its affordability and potent dephosphorization capabilities, finds widespread use as a dephosphorization agent in the direct reduction roasting of high-phosphorus oolitic hematite (HPOIO). However, its precise impact on iron recovery and the dephosphorization of iron minerals with phosphorus within HPOIO, particularly the mineral …
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In the present study, roasting-induced phase change and its influence on phosphorus removal via leaching has been investigated for high-phosphorus iron ore. The findings indicate that phosphorus in the ore is associated with goethite and exists mainly in amorphous Fe3PO7 phase. The phosphorus remains in the amorphous phase after being …
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On the other hand, about 61% of phosphorus in the iron ore was removed by the combined alkaline roasting and water washing at the conditions optimized as 50 g/kg-ore NaOH at 300° C for 0.5 h. The ...
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Phosphorus is one of the most deleterious elements in iron ore as it follows iron during downstream reduction processes, forming iron phosphides that make steel brittle. Excess phosphorus increases the cost of steelmaking and the steel industry has placed an upper limit of 0.07–0.08 wt-% P on the iron ore feed.
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Phosphorous is an undesired element present in iron ore used in the steel making process. It leads to an increase in overall production cost as well as deteriorated steel quality. The desired phosphorus content in iron ores used in steel making is < 0.1%.
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The iron recovery rate for high-phosphorus iron ore reached 92% with relatively high phosphorus content of pig iron about 0.28%under the reduction temperature of 1450 °C.
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Gas-based reduction at a slow rate to capture migration route of P from original apatite to reduced iron. A detailed statistical analysis was performed for the distribution of P and Fe. Metallic iron provides a site for gasified P, which inhibits volatilization of P …
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