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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%. Numerous beneficiation studies are mentioned in the literature; however, there is no …
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The addition of iron is a convenient way for removing phosphorus from wastewater, but this is often considered to limit phosphorus recovery. Struvite precipitation is currently used to recover phosphorus, and this approach has attracted much interest. However, it requires the use of enhanced biological phosphorus removal (EBPR). …
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DOI: 10.1016/S1006-706X(13)60091-6 Corpus ID: 137028920; Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment @article{Tang2013IntensifyingGR, title={Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment}, author={Huiqing Tang and …
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High-phosphorus oolitic iron ore, treated by suspended flash magnetic roasting, contained 42.73% iron (mainly present as magnetite) and 0.93% phosphorus (present as collophane). Low …
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A thermodynamic analysis of the carbothermic reduction of high-phosphorus oolitic iron ore (HPOIO) was conducted by the FactSage thermochemical software. The effects of temperature, C/O ratio, additive types, and dosages both on the reduction of fluorapatite and the formation of liquid slag were studied. The results show …
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The gasification removal behaviour of phosphorus from high-phosphorus iron ore is theoretically and experimentally studied in the temperature range of 400–900 …
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High-phosphorus iron ore resource is considered a refractory iron ore because of its high-phosphorus content and complex ore phase structure. Therefore, the development of innovative technology to ...
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DOI: 10.1016/j.mineng.2024.108765 Corpus ID: 270221833; Migration behavior of iron and phosphorus during gas-based reduction for high-phosphorus iron ore @article{Ji2024MigrationBO, title={Migration behavior of iron and phosphorus during gas-based reduction for high-phosphorus iron ore}, author={Guangheng Ji and Cihong …
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The effect of CaCO3, Na2CO3, and CaF2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe3PO7 and apatite was investigated. The results revealed that Na2CO3 had the most significant effect on iron recovery and dephosphorization, followed by CaCO3, the effect …
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In the traditional roasting process of high-phosphorus iron ore (HPIO), a large amount of sodium or calcium salt needs to be added to enhance iron recovery and dephosphorization, which leads to an increase in production costs. In this paper, the co-reduction roasting followed by magnetic separation process was designed to realize the …
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phosphorus removal of high-phosphorus iron ore WU Shi-chao()1, LI Zheng-yao()1*, SUN Ti-chang()1, LI Xiao-hui()2, XU Cheng-yan()1 1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Culture and Tourism, Qujing Normal ...
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Deposits of high-phosphorus iron ores are widely spread worldwide, but the use of these deposits in industry is limited owing to the high phosphorus content, which affects the cost of the iron ...
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Industry test on phosphorus removal and direct reduction of the "Ningxiang type" high-phosphorus oolitic hematite ore has been carried out in a tunnel kiln on the basis of laboratory experiment. The iron grade and phosphorus content of the initial sample are 42.46% and 0.867%, respectively. The results showed that high …
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With the depletion of high-quality iron ore resources, high-phosphorus oolitic hematite (HPOH) has attracted great attention due to its large reserve and …
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Global steel production is growing but high-grade ores have been depleted coupled with the decarbonization of the steel industry. The world has to utilize low-grade ores and to use hydrogen in the reduction process to curb CO2 emissions. The phosphorus distribution behavior in iron ore pellets reduced by CO-H2 gas mixtures …
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This paper reports the phosphorus removal of high phosphorus oolitic iron ore by acid leaching and its influence factors. The experimental ore is Exi high phosphorus oolitic iron ore with 0.5% phosphorus, 51.7% iron and 0.34% sulphur. After acid leaching, the P content decreases to about 0.07%, the iron loss during acid leaching is about 0.18%, …
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Dephosphorization is essential for utilizing high-phosphorus iron ore (HPIO), and this work prepared reduced iron powder via reductive roasting in a semi-industrial rotary kiln follower by magnetic separation. Under the conditions, reductive temperature of 1150°C, duration time of 60 min, mass ratio of briquettes to pea coal of 1:1, the ...
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Many iron ore deposits around the world are extensive and easy to mine, but can't be used because of their high phosphorus content. Phosphorus content in steel should generally be less than 0.02 percent. Any more and steel becomes brittle and difficult to work. Beneficiation plant processing, which treats ore to make it more suitable . . .
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New to the list are high-purity iron — used in green steel making and decarbonization; phosphorus — essential for batteries and food security, and silicon …
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Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …
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1. Introduction. Australia's iron ore industry is undergoing a major transformation. Reserves of traditional high-grade ores are becoming depleted while the replacement ore types are lower in grade and sometimes require beneficiation to remove or minimise contaminants such as alumina, silica and phosphorus (Dukino et al., …
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New to the list are high-purity iron — used in green steel making and decarbonization; phosphorus — essential for batteries and food security, and silicon metal — required for semiconductors ...
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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 …
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with gangue minerals, which cause iron and phosphorus to be difficult to separate. High-phosphorus iron ore is a world-recognized complex refractory iron ore. 10) On account of the above-mentioned difficulties, in recent years, experiments using the high-phosphorus iron ore have been carried out to improve the iron grade while considering ...
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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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To clearly show the effect of temperature on the carbothermic reduction of high-phosphorus iron ore, the high-phosphorus iron ore was reduced at various temperatures between 1323 K and 1523 K (1050 °C and 1250 °C) while keeping other process parameters fixed (C/O molar ratio: 1.0, holding time: 3 h, heating rate: 100 …
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The global confirmed reserves of high-phosphorus iron ore exceed 20 billion tons, mainly distributed in countries such as Algeria, China, Kazakhstan, and …
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phorus. However, there have also been reports on the simultaneous recovery of iron and phosphorus to prepare Fe–P alloys for high-phosphorus steel production [16]. Zhou [17] proposed a microwave-fluidized bed pretreatment technology (MFP) to enhance the separation of oolitic hematite. Compared with those obtained …
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Unlike ordinary steel slag, high phosphorus steel slag was derived from smelting medium and high phosphorus hot metals having phosphorus content up to 10% or more (Diao et al., 2012).The molten iron needed to be dephosphorized below 1500°C, wherein it was required that the content of CaO in the slag should not be too high.
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This paper aims at reviewing literature on the occurrence of phosphorus in iron ores from the mines around the world. The review extends to the phosphorus removal processes of this mineral to meet the specifications of the steel industry. Phosphorus is a contaminant that can be hard to remove, especially when one does not know its mode of …
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