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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 …
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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 …
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In Western Hubei, China, phosphorus mainly exists in the form of apatite in high-phosphorus oolitic iron ore, and the iron minerals in raw ore contain phosphorus. Therefore, the dephosphorization of raw ore is more difficult. 10 20 30 40 50 60 70 80 90 2 / (°) Intensity / a.u. D C/E A/E A/B/D A/B/D A/B A A A A A B E B A Hematite(Fe2O3) B ...
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Around 54% of phosphorus (P), 21% of Al 2 O 3, and 61% of SiO 2 can be preliminarily removed from unroasted oolitic hematite ore. Through further dephosphorization with dilute sulfuric acid at room temperature, a high-quality Fe concentrate with 63.3% Fe, 0.04% P, and a Fe recovery rate of 96% was obtained.
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High-phosphorus (P) iron ore, particularly oolitic hematite, has remained unexploited due to technological and cost limitations in mining. Effectively developing this ore involves not just utilizing its iron content but crucially extracting P to reduce exploitation costs. Here, we applied a direct reduction-magnetic separation process to recover these valuable …
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1. Introduction. There is huge amount of high phosphorus iron ore resources in many iron ore production areas, such as West Australia, Brazil, South Africa and Central South of China. 1–5 According to the statistical survey, the reserves of high phosphorus iron ore reach 7.45 billion tons in China, and among them more than 4 billion tons was deposited in Hubei …
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Especially in China, high-phosphorus oolitic hematite is widely distributed in the Hunan, Hubei, and Yangtze River basins, accounting for over 10 % of China's iron ore reserves (Sun et al., 2014, Keith, 2018), which presents a special concentric oolitic layered structure.
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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 studied by X-ray...
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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 studied by X-ray …
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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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Gaseous reduction kinetics of the high phosphorus iron ore fines from Hubei in China and effect of microwave pretreatment on the gaseous reduction behavior were studied. Gaseous reduction kinetics were investigated by TG (Thermogravimetric) methods using LINSEIS STA PT 1600 thermal analysis equipment. Microwave pretreat-ments to the ore fines with four …
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The iron ore reserves of 3.72 billion tons, account for approximately 73.5% of the sedimentary iron ore in China (Lu et al., 1994). The high phosphorus oolitic hematite has the characteristics of low-grade iron content and high-level harmful impurities, such as phosphorus and aluminium (Wei, 2010), which limit the development of this oolitic ...
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Reduction roasting of high-phosphorus oolitic iron ore (HPOIO) requires the addition of expensive alkali metal compounds to enhance dephosphorization. In this paper, the eggshell waste from the catering industry was used to replace traditional dephosphorization agents, which not only avoided environmental problems caused by mining, but also ...
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The results indicated that when high-phosphorus iron ore concentrates containing 54.92 mass pct iron and 0.76 mass pct phosphorus were directly processed through acid leaching, iron ore ...
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To efficiently utilize high-phosphorus oolitic hematite resources, a method using direct reduction followed by melting separation was proposed. In this study, direct reduction …
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The iron ore with high phosphorus content is a common complex symbiotic iron ore species, and it is widely distributed in the United States, France, Russia, Australia and China [[1], [2], [3]]. Most of this type of ore presents an oolitic microstructure [1].
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Despite the abundant reserves of iron ore resources in China, the overall iron ore is characterized by the behavior of low grade, fine grain size, and high impurities, resulting in the situation of importing large quantities of iron …
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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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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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Among them, high-phosphorus oolitic hematite (HPOH) is a competitive choice since it has a relatively high iron content (average 52%) and a large reserve of 3.72 × 10 9 t, …
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With the development of China's iron and steel industry, the demand for iron ore is increasing, and the contradiction of iron ore shortage is prominent. 1, 2) China is rich in high-phosphorus …
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