iron ore dephosphorization thermodynamic

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

Dephosphorization Treatment of 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%T.Fe, 0.52%P) used in this work were analysed by SEM-EDS and XRD, which showed their oolitic structure and mineral phases.

iron ore dephosphorization thermodynamic sale

Dephosphorization - an overview ScienceDirect Topics 05/01/2012 Phosphorus in the charge could be at higher than usual levels for DRI, HBI, pig iron, and hot metal, depending on the iron ore source. Some steels require particularly low P levels to avoid too high ...

Dependence of Temperature and Slag Composition on …

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The Phosphorus Reaction in Oxygen Steelmaking: …

 · However, in the last decade, the iron ore price has risen by roughly 400% and lower cost iron sources generally have higher phosphorus content. In integrated steel plants, phosphorus removal usually takes place during the oxygen steelmaking process (OSM) but in Japan a intermediate step for hot metal dephosphorization is commonly used.

v116n6a14 Experimental study on phosphorus distribution ratio and capacity of environment-friendly dephosphorization …

3547 0''5973 As international iron ore prices continue to rise, the development of China''s steel industry is facing a lot of pressure. Against this background, development and utilization of domestic high-phosphorus iron ore resources is particularly important. When

Dephosphorization treatment of high phosphorus oolitic …

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%T.Fe, 0.52%P) used in this work were analysed by SEM-EDS and XRD, which showed their oolitic structure and mineral phases.

Effect of direct charging of hot recycled slag on hot metal pretreatment dephosphorization in a dephosphorization …

Effect of direct charging of hot recycled slag on hot metal pretreatment dephosphorization in a dephosphorization furnace Xue-feng Bai1, Yan-hui Sun1, Lei Luo2, Chang-liang Zhao2 1 Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China; 2 Shougang Jingtang United Iron & Steel Co., Ltd., Tangshan 063200, Hebei, China

Furnaces (BOFs) Using Data Driven Modeling Techniques

Thermodynamic models are an excellent tool to start with; however, such models alone may not accurately predict dephosphorization in BOF shops because of the large variation in iron ore quality, coke composition, etc. The models employ short range ordering

BENEFICIATION, DEPHOSPHORIZATION AND …

 · Tags: Absorbance-concentration, Agbaja Iron Ore, Atomic Absorption Spectrophotometer, Bacteria Isolation., Bacteria leaching, Beneficiation, biodephosphorization, biodesulphurization, Chemical Engineering-Dissertation-2010, Chemical leaching, Chime, Dephosphorization, Desulphurization, Digital muffle furnace, Froth Flotation Technique, Humphrey spiral technique, …

Dephosphorization Treatment of High Phosphorus Oolitic …

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%T.Fe, 0.52%P) used in this work were analysed by SEM-EDS and XRD, which showed their oolitic structure and mineral phases.

BENEFICIATION, DEPHOSPHORIZATION AND …

and Oshokoshoko iron ores because of its texture. This work studied the. beneficiation, dephosphorization and desulphurization of Agbaja iron ore. The raw. ore was beneficiated using several techniques namely; oil agglomeration technique, rapid magnetic separation technique, Humphrey spiral technique, froth flotation.

iron ore dephosphorization thermodynamic

A thermodynamic analysis of iron and phosphorus mineral Yin JQ Lv XW Bai CG Qiu GB Ma SW Xie B Dephosphorization of iron ore bearing high phosphorous... Know More journals on dephosphorization of iron ore Mining World

Stability analysis of hydroxyapatite in the system P-Ca-H2O …

On the basis of these thermodynamic analyses, a suitable dephosphorization method of acid leaching at room temperature was proposed for high phosphorus iron ore. Stability of hydroxyapatite (HA) in the system P-Ca-H2 O at room temperature (298 K) and elevated temperature (363 K) were analyzed in terms of log [P]-pH diagrams to discuss the mechanisms of phosphorus removal from high …

Strengthening iron enrichment and dephosphorization …

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 diffraction (XRD ...

DEPHOSPHORIZATION OF AGBAJA IRON ORE BY …

 · The organism used, performed very well in dephosphorization & upgrading of iron content in Agbaja iron ore under the following conditions: Particle size range of 0.32 — 0.63mm, pH=2, inoculum size of 5ml (at 0.5Mc Farland standards in 300ml of experimental

Thermodynamic Behaviors of Nb and P in …

Abstract The Bayan Obo iron ore contains valuable metallic elements such as niobium and rare earth elements. However, developing appropriate metallurgical processes to achieve effective dephosphorization of Nb-bearing hot metal meanwhile retaining Nb in the steel products remains a challenge. We carried out a thermodynamic study on dephosphorization of Nb bearing hot metal …

NTERNATIONAL OURNAL OF SCIENCES AND NGINEERING OL O ULY Optimization of Process Conditions for the Dephosphorization of Iron Ore …

Matsuo et al (1980) investigated the dephosphorization of iron ore using acid leaching. The iron ore contained phosphorus in the form of apatite, Ca 5 (PO 4) 3 F. The optimum leaching time was found to be 10 hours. Without the use of heat treatments a Peixoto ...

CN101717842A

The invention provides a method for dephosphorization and desulphurization in the process of steel production in an induction furnace, which is characterized by comprising the following steps of: during the smelting period and the initial period of total meltdown of ...

dephosphorization of iron ore

iron ore dephosphorization thermodynamic sale Aug 15, 2016 Dephosphorization of Steels . However, in the recent past, because of high iron ore ps, lower pd iron ores from sources which normally have higher P content are being used and this has made P control

Dependence of Temperature and Slag Composition on …

 · The thermodynamic calculation software FactSage 6.4, SEM combined EDS and XRD were applied to analyze structures and properties of slag to understand how the slag affects to dephosphorization. 80 Phosphorus removal rate/mass% 75 70 65 60 55 50 45

Applying Low Titanium Blast Furnace Slag to Semi-steel …

Applying Low Titanium Blast Furnace Slag to Semi-steel Steelmaking: Dephosphorization Thermodynamics and Industrial Experiment WANG Baohua 1, 2, ZHU Rong 1, HUANG Shiping 3, GONG Yongyu 2, WANG Shizhao 2, ZHANG Mingbo 1, 2 1 School of ...

An Application of Decision Tree-Based Twin Support Vector Machines to Classify Dephosphorization …

In general, thermodynamic models are extremely beneficial to get an idea of the dephosphorization process in BOF steelmaking, and in many cases, provide accurate estimates of the dephosphorization index too. However, accuracy of such estimates greatly

Thermodynamic Modelling of Iron Ore Sintering Reactions

minerals Article Thermodynamic Modelling of Iron Ore Sintering Reactions Chunlin Chen 1,*, Lu 1 and Kexin Jiao 2 1 CSIRO Mineral Resources, Clayton, VIC 3168, Australia; [email protected] 2 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,

An Application of Decision Tree-Based Twin Support Vector Machines to Classify Dephosphorization …

metals Article An Application of Decision Tree-Based Twin Support Vector Machines to Classify Dephosphorization in BOF Steelmaking Jovan Phull 1, Juan Egas 1, Sandip Barui 2, Sankha Mukherjee 1 and Kinnor Chattopadhyay 1,* 1 Department of Materials Science and Engineering, University of Toronto, 184 College Street, ...

Strengthening iron enrichment and dephosphorization of …

 · 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 diffraction …

Thermodynamics Analysis of Hot Metal …

Abstract: In this paper, CaO-Fe 2 O 3-CaCl 2 and CaO-Fe 3 O 4-CaCl 2 system dephosphorizer depho- -sphorization of the thermodynamics of the use of FactSage thermodynamic calculation software Equilib module of hot metal dephosphorization flux and the balance between the response calculated, to find the right dephosphorizer dephosphorization ratio and the conditions for optimal phosphorus …

iron ore dephosphorization thermodynamic sale

Dephosphorization an overview ScienceDirect Topics 05/01/2012 Phosphorus in the charge could be at higher than usual levels for DRI, HBI, pig iron, and hot m Thermodynamic analysis and experimental study of manganese The increase in the international iron ore ...

Development of simulation model for hot metal …

The simulation model for hot metal dephosphorization process by multi-phase slag was developed by the ISIJ research group of "Process Simulation for Dephosphorization of Pig Iron by Multi-Phases". The model employed a multi-scale model, which was an integration of macro- and meso-scale models.

Thermodynamic Behaviors of Nb and P in Dephosphorization of Niobium-bearing Hot Metal with BaO-based Slag-《Journal of Iron …

Thermodynamic Behaviors of Nb and P in Dephosphorization of Niobium-bearing Hot Metal with BaO-based Slag The Bayan Obo iron ore contains valuable metallic elements such as niobium and rare earth elements. However, developing appropriate ...

The Surface Properties of Aqueous Fluorapatite and Maghemite with Reference to the Dephosphorization …

world of high grade iron ore products. However, the Kiruna magnetite ore deposit contains an average of 1 wt% phosphorus (mainly fluorapatite), which is detrimental to the blast-furnace technology and the quality of the iron products. Consequently the apatite

Thermodynamic Justification of the Dephosphorization …

 · The dephosphorization of manganese ores and concentrates in a reducing atmosphere is thermodynamically analyzed. It is shown that phosphorus can completely pass to a gas phase in a closed reaction system in a wide temperature range (1000–1800 C) at the amounts of a reducing gas (CO) that exceed the stoichiometric minimum required for reduction reactions.

Representation of Dephosphorization Ability for CaO …

The calculated mass action concentrations of iron oxides in the several CaO-containing slags can be applied to represent reaction ability of iron oxides, like classic concept of activity. The developed thermodynamic model for calculating phosphorus distribution can quantitatively calculate the respective contribution of free components, and the sum of the respective contribution of free ...

iron ore dephosphorization thermodynamic sale

iron ore dephosphorization thermodynamic sale Aug 15 2016 Dephosphorization of Steels However in the recent past because of high iron ore ps lower pd iron ores from sources which normally have higher P content are being used and this has made P control ...

Optimization of Process Parameters for the Dephosphorization of iron ore …

dephosphorization was obtained at optimum values of 120 minutes, 2.0 Moles and 10 microns Keywords: Optimization, Dephosphorization, Surface Response, Nitric acid. INTRODUCTION The Nigeria''s Agbaja iron ore reserve is estimated to be over 1.2

iron ore dephosphorization thermodynamic

iron ore dephosphorization thermodynamic In a safety critical situation, knowledge of positioning and well-being may be welcomed, but the information should not be misused.0 also represents an opportunity to empower people; there are opportunities for wider communication that provides information that builds knowledge and understanding and gives the miners "super powers" [33].

Thermodynamic analysis and experimental study of manganese …

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 extent.

A Contribution to Modeling and Control of …

 · A Contribution to Modeling and Control of Dephosphorization in the Oxygen Steelmaking Process. Phosphorus has a detrimental effect on the quality of steel as it reduces its ductility and toughness. In order to ensure a good quality of the final product, the requirements for steel regarding the phosphorus content are very strict.

dephosphorization process, however, has not yet A Thermodynamic Study on the The oxidation Dephosphorization of Chromium Containing Molten Iron

A Thermodynamic Study on the Dephosphorization of Chromium Containing Molten Iron S. C. Lee, J. J. Pak* and S. H. Kim Dept. of Materials Science and Engineering POSTECH, Pohang 790-784, Korea * Dept. of Metallurgy and Materials Engineering

Dephosphorization reaction_Steel Pipe …

 · However, the acid converter steelmaking dephosphorization; low-phosphorus of the iron ore a serious impediment to the development of steel production. 1879 Thomas (S.Thomas) invented the converter steelmaking method can handle the high phosphorus hot