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Apr 14, 2020· 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 diffraction (XRD), vibration sample magnetometer (VSM), scanning electron microscopy and energy dispersive spectrometry (SEM-EDS).
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With the current tendency for development of a low-cost and eco-friendly process, dephosphorization of high-phosphorus iron ore through microbial process with three different sources of Aspergillus niger strains was studied in this study. Results show that the three strains of A. niger could grow well in the broth, and effectively remove ...
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high phosphorus iron ore powder and the actual production of the high phosphorus steel slag is more efficient to provide theoretical and technical support. ... so as to achieve the purpose of gasification and dephosphorization. FactSage7.1 thermodynamic software is mainly used in pellet roasting to study the effect of different ...
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High-phosphorus iron ore is traditionally dephosphorized by chemical process with inorganic acids. However, this process is not recommended nowadays because of its high cost and consequent environmental pollution. With the current tendency for development …
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Oct 04, 2021· Dephosphorization of Iron Ore Bearing High domestic low grade iron ores for the iron and steel plant in China, as China has a large deposit of high phosph ... dephosphorization is put forward.High phosphorus iron ore was taken as the research object and simulated with Fact Sage thermodynamic software.According to the …
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May 26, 2019· 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 diffraction (XRD), vibration sample magnetometer (VSM), scanning electron microscopy and energy dispersive spectrometry …
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DEPHOSPHORIZATION OF GOETHITE ORE by Long Zhang. With the depletion of high-grade and low phosphorus iron ore reserves, the extensive goethite ores containing high phosphorus become more attractive However, there is a lack of effective and economic technologies for removing phosphorus from goethite ore The current utilization of …
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In recent years, the demand for iron ore has increased with the rapid development of the iron and steel indus-try, and the problem of iron ore shortage is prominent. ... The thermodynamic relation of dephosphorization reaction equation ˛rG0-T is calculated by FactSage6.1 soft-ware to explain the reduction and gasification mechanism of
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In order to examine the possibility of utilizing Mn ore in the pretreatment process of liquid iron, experiments were carried out in a system with liquid iron and CaO‐SiO2‐MgO‐Al2O3‐FeO slag with additives (Mn ore and Fe2O3+MnO2) in a magnesia crucible at 1673K. When Mn ore was added to the pretreatment slag, decarburization, …
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The invention provides a dephosphorization method for molten iron, which mainly aims at the dephosphorization of the molten iron of a large converter. The method comprises the following steps of: (1) supplying oxygen to the surface of the molten iron from the top through an oxygen lance, wherein the oxygen supply strength is changed in a range of …
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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 Magnetite(Fe3O4) C Siderite(FeCO) E Goethite ...
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Oct 04, 2021· Dephosphorization of Iron Ore Bearing High . domestic low grade iron ores for the iron and steel plant in China, as China has a large deposit of high phosphorous iron ore with existing reserve of 7.45 billion tons which is unused in any large scale.1) The dephosphorization process for high phosphorous iron ores has been studied for many …
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Sep 21, 2017· Thermodynamics of molten iron oxidizing dephosphorization. Phosphate brought by iron ore and fluxing agent will be reduced into the molten iron. Phosphorus in the molten iron will take indirect or direct oxidation,,, under oxidizing agent or oxidizing atmosphere, and all its oxidation products are gases at high temperatures.
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A kind ofly in molten iron, add the method for carrying out dephosphorization treatment based on the refining agent in CaO source and oxygen source, wherein, with make the basicity of the slag after process more than 2.2 and below 3.5, T.Fe concentration is 10 ~ 30mass% and makes the mode of molten iron process terminal temperature more than …
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The dephosphorization of high phosphorus iron ore has been researched in many countries, such as physical separation, 6,7,8,9,10) bio-leaching, 11,12) flotation, 13,14) hydrometallurgical process. 15,16) But the oolitic structure of the ore prevents the effective use of physical concentration and flotation separation, and necessitates the use ...
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Nov 24, 2021· The effect of CaCO 3, Na 2 CO 3, and CaF 2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe 3 PO 7 and apatite was investigated. The results revealed that Na 2 CO 3 had the most significant effect on iron recovery and dephosphorization, followed by CaCO 3, the …
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iron ore dephosphorization thermodynamic sale. iron ore dephosphorization thermodynamic sale Dephosphorization of Steels, ispatgu Aug 15, 2016 Dephosphorization of Steels However, in the recent past, because of high iron ore prices, lower priced iron ores from sources which normally have higher P content are being …
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It is shown how advanced thermodynamic calculations have become more accessible since: • —|A more user-friendly windows version of Thermo-Calc, TCW, has been developed. • —|There is an increasing amount of thermodynamic databases for different materials available. •
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Mar 10, 2020· Thermodynamic analysis and experimental study of . process from dephosphorization (using De-P and De-C converters) in the duplex melting process is advantageous, as it allows for the use of phosphorus-rich iron ore and relatively lower amounts of slag, as well as direct alloying with manganese ore in the converter. ... In this …
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High-phosphorus iron ore is not used because of its high phosphorus content. Phosphorus is mainly present in fluorapatite. In this work, the phosphorus vaporization that occurs during the carbothermal reduction of fluorapatite was investigated. The thermodynamic principle of vaporization, which removes phosphorus during carbothermal reduction, was elucidated, …
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A New Route to Upgrading the High-Phosphorus Oolitic … · The results show that by only adopting traditional magnetization roasting–magnetic separation, an iron ore concentrate containing 57.49% Fe and 1.4% P2O5 at an iron recovery rate of 87.5% and a dephosphorization rate of 34.27% was produced, indicating that it is difficult to …
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Dephosphorization of steel is critical due to the rising prices ( rise in past five years) of iron ore, which has resulted in the use of lower grade iron ores [].Increased phosphorus (P) content in steel imparts cold shortness and leads to poor ductility, toughness, formability, and embrittlement [2,3].It has been observed that the primary driving factor for …
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