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ji study on dephosphorization technology for high phosphorus
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Removal of phosphorus from iron ores by chemical leaching
Alkali-leaching and acid-leaching were proposed for the dephosphorization of Changde iron ore, which contains an average of 1.12% for phosphorus content. Sodium hydroxide, sulfuriced, hydrochloric and nitric acids were used for the preparation of leach solutions. The results show that phosphorus occurring as apatite phase could be …
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Mechanism of phosphorus removal in beneficiation of high …
Research on beneficiation technology for certain high phosphorous hematite ore from Yichang, Hubei [J] ... XPS and FTIR spectroscopic study on microwave treated high phosphorus iron ore. Applied Surface Science, Volume 345, 2015, pp. 127-140 ... Mamdouh Omran, …, Abd El-Hamid Elmanawi. Thermally assisted liberation of high …
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Experimental Study on Dephosphorization of High-Phosphorus …
The Transformation Law of Phosphorus. X-ray diffraction analysis of dephosphorized slags and Mn–Si alloys after dephosphorization was carried out, and the results are shown in Fig. 2.Without the addition of Al-based dephosphorization agent, P element exists in the form of 6 · 2CaO · SiO 2 –3CaO · P 2 O 5 solid solution and 3FeO · …
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Mechanism of Phosphorus Enrichment in …
technology, resulting in a mean dephosphorization efficiency of 91%, which is much higher than the efficiency (82%) obtained in the previous process [1]. Fang et al. [14] ap-plied the IDDSC technology on a 120-t steelmaking converter and studied the influence of the basicity and oxidizability of slag on the dephosphorization performance. Fifty
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Flotation Dephosphorization of High-Phosphorus Oolitic Ore …
Ji, J. Study on dephosphorization technology for high-phosphorus iron ore. Min. Metall. 2003, 12, 33–37. [Google Scholar] Guo, W.; Sun, Y.S.; Yang, Y.H. …
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Study on gasification dephosphorization of phosphorus
The mechanism of reduction and dephosphorization of phosphorus-containing magnetite was studied using SiC as reducing agent. The thermodynamic conditions for the reduction of Ca3(PO4)2 and Fe3O4 by SiC were simulated by FactSage7.1 thermodynamics software, respectively, indicating that the reduction of …
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1,2,3,*, Yushu Zhang 1,2,3, Kai Zou 1,2,3 and Feilong Zhang
is limited for iron ore with high phosphorus content, and can not get higher quality prod-ucts [21–28]. Bacterial leaching dephosphorization, on the other hand, is time-consuming, and chemical leaching dephosphorization may pose environmental contamination risks. Generally speaking, flotation dephosphorization [29,30] is …
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Numerical Study of the Kinetics of Dephosphorization with …
A gas-metal two-phase flow model was established for the 250 t converter blowing process, and a coupled mass transfer model based on the standard k-ε model for converter dephosphorization kinetics was used to study the effects of different oxygen lances and bottom blows on the molten steel velocity, melt pool phosphorus distribution …
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Experimental Study on Dephosphorization of High …
Publish with us. Policies and ethics. In an attempt to reduce phosphorus content of the Mn–Si alloysMn-Si alloys produced by high-phosphorus manganese …
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Strengthening iron enrichment and dephosphorization of high-phosphorus …
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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Effect of calcium compounds on direct reduction and …
found in the iron minerals in the high-phosphorus iron ore investigated in this study, while its dephosphorization has rarely been reported. In this paper, CaCO 3, CaCl 2, and CaSO 4 with distinct anions were selected as calcium compounds, the effect of them on the direct reduction of high-phosphorus iron ore were investigated. Thermodynamic ...
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Dephosphorization mechanism in a roasting process for
In this study, sodium salts-modified paigeite (SSMP) was added to enhance on the dephosphorization of high-phosphorus oolitic hematite by using reduction roasting followed by magnetic separation.
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Effect of coal levels during direct reduction roasting of high
The effect of coal levels on phosphorus removal from a high phosphorus oolitic hematite ore after direct reduction roasting have been investigated. Raw ore, coal, and a dephosphorization agent were mixed and the mixture was then roasted in a tunnel kiln.The roasted products were treated by two stages of grinding followed by magnetic …
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Study on Efficient Dephosphorization in Converter …
The phosphorus distribution ratio between the slag and steel could well reflect the dephosphorization degree in the converter steelmaking process. The larger the phos-phorus distribution ratio was, the better the dephosphorization effect was. As shown in Equation (1), this study cited the thermodynamic empirical formula for …
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A new iron recovery and dephosphorization approach from …
Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for …
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Study on the strength of cold-bonded high-phosphorus …
Composite briquettes containing high-phosphorus oolitic hematite and coal were produced with a twin-roller briquette machine using sodium carboxymethyl cellulose, molasses, starch, sodium silicate, and bentonite as binders. The effect of these binders on the strength of the composite briquettes, including cold strength and high-temperature …
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Phosphorus Removal of High Phosphorus Iron Ore by Gas …
A new method (gas-based separation plus melt separation) has been proposed to remove phosphorus of the high phosphorus iron ore which was 1.25% of phosphorus content and 50.0% of iron content. HSC chemistry package and the coexistence theory of slag structure were adopted for theoretical analysis. The gas …
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Mechanism of phosphorus removal in beneficiation of high …
Many researchers focus on the dephosphorization of high phosphorus-containing oolitic hematite ore by adding a large amount of additive during the reduction process [27, 28]. For example, reduced ...
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A new way to efficient utilization of eggshell waste: As green
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 …
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Research on efficient utilization of high-phosphorus …
complex structure of high-phosphorus oolitic hematite [16], cannot achieve independent and efficient separation [17]. LIU et al [18] investigated the flotation experiment on high-phosphorus oolitic hematite with an iron grade of 48.97% and a phosphorus content of 0.92%. The dephosphorization reverse flotation was carried out
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Preparation of Reduced Iron Powder from High Phosphorus …
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 ...
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A new way to efficient utilization of eggshell waste: As green
The cleaning and efficient disposal of eggshell waste presents many challenges. 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 …
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ji jun study on dephosphorization technology for high phosphorus
ji jun study on dephosphorization technology for high . ji jun study on dephosphorization technology for high phosphorus, Investigations of the Dephosphorization of Liquid Iron Solution . Jan 14, 2012 . In particular, the study was focused on the selection of the optimal slag . The results may be of use for the design of …
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Mass transfer of phosphorus in high-phosphorus hot-metal …
Mass transfer of phosphorus in high-phosphorus hot-metal refining was investigated using CaO-Fe t O-SiO2 slags at 1623 K. Based on a two-film theory kinetic model and experimental results, it was found that the overall mass transfer coefficient, which includes the effects of mass transfer in both the slag phase and metal phase, is in …
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ji jun study on dephosphorization technology for high phosphorus
Study on Phosphorus Removal of High-Phosphorus … Phosphorus removal of oolitic iron ore has been investigated by many researchers, and several processes have been proposed, such as selective agglomeration plus reverse flotation (Ji 2003 Ji, J., 2003, "Study on dephosphorization technology for high-phosphorus iron ore."
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Advance in dephosphorisation of high phosphorus iron ore …
In order to make good use of huge amount of high phosphorous iron ore for the ironmaking industry, the characteristics and advances in the dephosphorization technologies of high phosphorus iron ...
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Effect of highly oxidizing converter dephosphorization slag …
PDF / ePub. More. Abstract. In order to study the effect of highly oxidizing dephosphorizing converter slag on the migration behaviour of phosphorus in molten …
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Gasification Behavior of Phosphorus during Hydrogen …
The experimental results show that in hydrogen-rich atmosphere, the dephosphoriza-tion rate increased from 9.9% to 29.51% and then decreased to 8.62% in the temperature range of 900°C–1 200°C, and the maximum value appeared at 1 100°C. Compared to the carbon reduction, the dephosphorization rate in hydrogen-rich atmosphere increased ...
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Research on Reaction Mechanism of Vacuum Carbon …
In this study, the technology of direct reduction and dephosphorization of high-phosphorus iron ore under vacuum condition was proposed based on the coal-based direct reduction method. Synthetic fluorapatite and analytically pure Fe2O3, SiO2, and Al2O3 were used as raw materials to simulate high-phosphorus iron ore.
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A new iron recovery and dephosphorization approach from high‑phosphorus …
DOI: 10.1016/j.powtec.2022.118043 Corpus ID: 253192611; A new iron recovery and dephosphorization approach from high‑phosphorus oolitic iron ore via oxidation roasting-gas-based reduction and magnetic separation process
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Experimental Study on Dephosphorization of High …
Procedure. In this experiment, the slag system composition as shown in Table 1 was used to conduct dephosphorization experiment on Mn–Si alloys with or without Al-based dephosphorization agent. The dosage of alloy was 100 g, the dosage of dephos-phorization agent was 5% of the alloy mass, and ratio of the slag to the metal was. 0.4.
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Phosphorus Removal of High Phosphorus Iron Ore by Gas …
A new method (gas-based separation plus melt separation) has been proposed to remove phosphorus of the high phosphorus iron ore which was 1.25% of …
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Enhanced iron extraction from high-phosphorus waste
Successful iron extraction and dephosphorization from high-phosphorus limonite by a process of grinding-SMR-stage grinding and magnetic separation-flotation. …
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ENHANCEMENT OF PYRO-HYDROMETALLURGICAL …
concentrate during its preparation for agglomeration. Such technology can also be applied to other high-phosphorus brown iron ores and concentrates. It has been established experimentally that hot leaching signifi-cantly reduces the duration of dephosphorization (by 3 times or more) compared to leaching under normal con-ditions.
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Dephosphorization of High-Phosphorus Iron Ore Using
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 of a low-cost and eco-friendly process, dephosphorization of high …
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A new iron recovery and dephosphorization approach from high‑phosphorus …
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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ji jun study on dephosphorization technology for high phosphorus
Dephosphorization process of high phosphorus oolitic iron ore by acid leaching and leaching kinetics were investigated in the paper. The high phosphorus ore samples (51%, %P) used in this work were analysed by SEMEDS and XRD, which showed their oolitic structure and mineral phases. احصل على السعر
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Ji, J. (2003) Study on Dephosphorization Technology for High-Phosphorus
Article citations More>>. Ji, J. (2003) Study on Dephosphorization Technology for High-Phosphorus Iron Ore. Mining & Metallurgy. 12, 33-37. has been cited by the following article:
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Study on Dephosphorization Technologies in Converter with …
The results show that the average rate of dephosphorization is above 90% with single-slag process during converter smelting. Otherwise, content of phosphorus at the end-point of converter smelting ...
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Experimental Study on Dephosphorization of High …
Abstract In an attempt to reduce phosphorus content of the Mn–Si alloys produced by high-phosphorus manganese ores, dephosphorization thermodynamic experi-ments …