### THEORETICAL AND EXPERIMENTAL STUDIES OF DISSIMILAR ...

EAF Electric Arc Furnace MgO Magnesium Oxide Al 2 O 3 Alumina CaAl Calcium- Aluminates MgO-Al 2 O 3 or MgO-TiO 2 Spinel MnS Manganese Sulfides CaS Calcium Sulfides SEM Scanning Electron Microscope B3 Slag Basicity CaO Lime/Calcium Oxide

### Thermodynamic Calculations Predicting MgO Saturated EAF ...

A thermodynamic program, Factsage (trademark), was utilized to study the quaternary oxide system of MgO-CaO-FeO-SiO2, to predict the dual (saturated with CaO and MgO) and MgO saturated EAF slag ...

### MgO Refractory Attack by Transient Non-saturated EAF Slag

charged to the EAF.The Minerals, Metals & Materials Society and ASM International 2020 MgO-C refractory is widely used in the sidewalls of electric arc furnaces (EAF). The MgO refractory is readily attacked by a MgO-undersaturated slag.[1] Therefore, a MgO-saturated slag is usually preferred in EAF practice. A small degree of supersaturation,

### Ab Initio Thermodynamic Model for Magnesium Carbonates and ...

Mar 28, 2014· An ab initio thermodynamic framework for predicting properties of hydrated magnesium carbonate minerals has been developed using density-functional theory linked to macroscopic thermodynamics through the experimental chemical potentials for MgO, water, and CO 2.Including semiempirical dispersion via the Grimme method and small corrections to the generalized gradient …

### VALorisation and dissemination of EAF technology VALEAF

of the electric arc furnace process 1.45 ARCEALIA, BFI, CSM, CENIM-CSIC, MEFOS 1999-07-01/2002-06-30 RFSR-CT-2006-00033 Control of nitrogen oxide emission at the electric arc furnace 1.51 RWTH-IOB, CSM, DEW, ORI, RIVA 2006-07-01/2009-06-30 List of ECSC/RFCS Projects with relevance to the Advanced EAF Modeling Off gas

### Experimental Study and Thermodynamic Calculations of the ...

Experimental Study and Thermodynamic Calculations of the MgO-Y 2 O 3-SiO 2 System p.399. Differential Thermal Analysis of Iron Containing Silicon Nitride p.405. Microstructural Features in Sintered Si 3 N 4 /SiC Platelets Systems p.413 ...

### A STUDY OF SLAG CORROSION OF OXIDES AND OXIDE …

Supplement IV: Literature survey, thermodynamic calculations, post-mortem studies and major part of writing Parts of the work were presented in the following conferences: I. “The use of thermodynamic computations to predict the phase transformation in MgO-C refractories during steel refining”; I. Kasimagwa and V. Brabie, 2nd

### The melting of MgO — computer calculations via molecular ...

The melting of MgO - computer calculations via molecular dynamics Received May 18, 1995/Revised, accepted July 30, 1995 Abstract Computer calculations based upon molecular dynamics have enabled us to model the melting be- haviour of MgO, a significant component of the Earth's lower mantle.

### Recycling MgO–C refractories and dolomite fines as slag ...

Sep 01, 2013· With the advent of thermodynamic and mass balance calculations,,,, it is possible to predict the slag saturation level, its overall chemical composition and define the most suitable conditioner that should be used during the electric furnace operation, reducing the need of …

### Thermodynamic Calculations Predicting MgO Saturated EAF ...

Corpus ID: 39370841. Thermodynamic Calculations Predicting MgO Saturated EAF Slag for Use in EAF Steel Production @inproceedings{Kwong2009ThermodynamicCP, title={Thermodynamic Calculations Predicting MgO Saturated EAF Slag for Use in EAF Steel Production}, author={K. Kwong and J. Bennett and R. Krabbe and A. Petty and H. Thomas}, year={2009} }

### Thermodynamic modeling of phase relations and metasomatism ...

Ductile shear zones have been recognized for a long time as privileged sites of intense fluid-rock interactions in the crust. In most cases they induce focused changes in mineralogy and bulk chemical composition (metasomatism) which in turn may control the deformation and fluid-migration processes. Therefore understanding these processes requires in a first step to be able to model phase ...

### Thermodynamic simulations and isothermal solubility ...

Sep 01, 2011· K.S. Kwong, J.P. Bennet, R. Krabbe, A. Petty, H. ThomasThermodynamic calculations predicting MgO saturated EAF for use in EAF steel production, in Proceedings of TMS 2009—138th Annual Meeting and Exhibition, San Francisco (2009), pp. 63-70

### Thermodynamic Properties and calculation

Calculate the heat and work requirements and ΔU and ΔH of the air for each path. The following heat capacities for air may be assumed independent of temperature: C V = 20.78 and C P =29.10 J mol-1 K-1 Assume also for air that PV/T is a constant, regardless of the changes it undergoes. At 298.15K and 1 bar the molar volume of air is 0.02479 m3 ...

### The melting of MgO — computer calculations via molecular ...

In a parallel study Ferneyhough et al. (1994), using the Lewis and Catlow potential (1985), have shown that calculations containing a free surface (i.e., periodic slab calculations) produce a melting temperature of 3250 + 200 K for MgO at zero pressure, in good agreement with experiment.

### Analysis of Secondary Refining Slag Parameters with Focus ...

FactSage 6.4, thermodynamic calculations were performed to determine the effective viscosity, solid fraction, liquid fraction and MgO saturation point of these slags at 1560ºC. The results showed that all the slags were saturated in MgO, revealing a better protection of …

### (PDF) FUNDAMENTALS OF EAF AND LADLE SLAGS AND LADLE ...

MgO saturated slags at 1600°C (2912°F) Slag A Slag B % MgO 9.3 8.3 % CaO 43.1 43.2 % SiO2 21.5 11.5 % Al2O3 10 % FeO 26.1 27.0 CaO B2 SiO 2 2.0 3.8 CaO B3 (SiO +Al O ) 2 2 3 2.0 2.0 20 In Slag B, 10% of the SiO2 was replaced by an equivalent amount of Al2O3. ... The thermodynamic calculations only predict that the reactions are possible but ...

### Chapter Outline: Phase Diagrams

MSE 2090: Introduction to Materials Science Chapter 9, Phase Diagrams 3 Solvent - host or major component in solution,solute- minor component. Solubility Limitof a component in a phase is the maximum amount of the component that can be dissolved

### Calculation of Peridotite Partial Melting from ...

(a)–(d) Maps of the stable phase assemblages predicted by MELTS for constant bulk compositions. In the region where liquid is present, the mass fraction of liquid (F) is contoured.Contours at 1% intervals for F up to 0·04 are shown dotted. Contours at 5% intervals for F ≥0·05 are shown dashed. (a) and (b) use the primitive upper-mantle composition of Hart & Zindler (1986); (c) and (d ...

### Chemistry Homework #2 You'll Remember | Quizlet

Calculate the value of the thermodynamic equilibrium constant for the following reactions at 25 C. The DGf o for POCl3(g) and PCl3(g) is -502kJ/mol and -270.kJ/mol, respectively. (Use Tables where necessary; double arrow means the reaction is at equilibrium)

### Modelling of thermo-chemical properties over the sub ...

Thermo-chemical properties and T–X phase relations diagram of the (Mg,Fe)O solid solution are modelled using mixing Helmholtz energy, ΔF(T,x)mixing, calculated by quantum mechanical and semi-empirical techniques. The sub-solidus MgO–FeO binary has been explored as a function of composition, with iron either in high-spin (HS) or low-spin (LS) configuration.

### Thermodynamic Model for Prediction of Slag-Steel-Inclusion ...

It has been reported that the CaO–Al 2 O 3 –SiO 2 –MgO slag has excellent refining properties, such as low oxidation potential, low melting temperature and low viscosity at steelmaking temperature. 15,16) Therefore, the compositions of CaO–Al 2 O 3 –SiO 2 –MgO slags were optimized using the current thermodynamic model to increase ...

### Petrographic and thermodynamic study of slags in EAF ...

Computational thermodynamics was used as a tool to predict the equilibrium phases in the top slag as well as the amount of these phases at the process temperatures. It was observed that, at process temperature, the stainless EAF slag generally consists of liquid …

### Thermodynamic simulation on mineralogical composition of ...

Thermodynamic calculation with FactSage 6.4. Thermodynamic simulation was carried out by using FactSage [version 6.4, Thermfact/CRCT (Montreal) and GTT technologies (Aachen)], which provides theoretical support for the complex calculation and simulation of thermodynamic process. FactSage software was established based on the minimum Gibbs ...

### Effects of Basicity and Mesh on Cr Leaching of EAF Carbon ...

Appl. Sci. 2019, 9, 121 2 of 12 the leaching behavior of Cr in slag started in the US over 30 years ago. The role of slag binary basicity (BI2: CaO/SiO2), MgO concentration and slag processing after slagging were investigated by Kilau and Shah [4]. When BI2 is above 2.0, Cr is present as calcium chromite (CaO Cr2O3), regardless of the MgO content, and the slag are prone to high Cr leachability.

### Chapter 4 Calculation of Standard Thermodynamic Properties ...

Thermodynamic modeling is important for understanding and predicting phase and chemical equilibria in industrial and natural aqueous systems at elevated temperatures and pressures.

### PROCEEDINGS OF THE VIII INTERNATIONAL CONFERENCE …

299 Thermodynamic Studies of MgO Saturated Eaf Slag Kyei-Sing Kwong, James Bennett, Rick Krabbe, Arthur Petty and Hugh Thomas 309 Thermodynamic Behavior of Transition Metal (Cr, Ti, Nb, V) Oxides in Molten Slags Baijun Yan, Jiayun Zhang and Qing Song 319 Thermodynamic Properties and Structural Assessment of Boron Oxide in CaO-SiO 2 and CaO-SiO ...

### Thermodynamic Calculations Predicting MgO Saturated EAF ...

The MgO Saturated Slag Chemistry Derived by Thermodynamic Calculations The dual saturated EAF slag chemistry can be predicted using linear relationships among oxides and their basicity (or acidictiy) as previous discussed.

### THERMODYNAMIC STUDIES OF MgO SATURATED EAF SLAG

The MgO Saturated Slag Chemistry Derived by Thermodynamic Calculations The dual saturated EAF slag chemistry can be predicted using linear relationships among oxides and their basicity (or acidictiy) as previous discussed.

### PROCEDURE FOR FINDING PROPERTIES FROM TABLES

IF v = v f THEN the fluid is saturated liquid and the values of pressure, internal energy u f, enthalpy h f, and entropy s f are read directly from the row corresponding to the known temperature T. IF v > v f AND v < v g THEN the fluid is a saturated mixture of liquid and vapor phases. First, find the quality x from the equation x = (v - v f ...

### Phase Equilibrium Diagram for Electric Arc Furnace Slag ...

metals Article Phase Equilibrium Diagram for Electric Arc Furnace Slag Optimization in High Alloyed Chromium Stainless Steelmaking Marcus Kirschen 1,*, In-Ho Jung 2 and Gernot Hackl 3 1 Thermal Process Engineering, University of Bayreuth, Universitätsstrasse 30, D-94557 Bayreuth, Germany 2 Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-Gu,

### Given the thermodynamic data in the table below, calculate ...

Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction: 2SO2 (g) + O2? (g) - Answered by a verified Tutor We use cookies to give you the best possible experience on our website.

### Modeling Dual and MgO Saturated EAF Slag Chemistry - Kwong ...

Jun 14, 2010· Summary This chapter contains sections titled: Introduction Thermodynamic Calculation Conditions Results and Discussion Modeling Dual and MgO Saturated EAF Slag Chemistry - Kwong - 2010 - Ceramic Transactions Series - Wiley Online Library

### SLAG ANALYSIS SOLUTIONS - Bruker

• MgO saturated since most slag lines consist of magnesia-carbon ... Modeling by means of thermodynamic data based on the major oxides . ... V and B3 ratio calculation included SOP and QA/QC to use in customer QA/QC system. S2 RANGER: All-in-one design.

### Case for Reactive Crystallization at Mid-Ocean Ridges ...

The compositional evolution of MORB magmas undergoing reactive crystallization is predicted using thermodynamic calculations. We find that the decreasing melt MgO content during reactive crystallization is accompanied by nearly constant Mg-number [defined as molar MgO/(MgO + FeO)], whereas melt SiO 2 and Na 2 O contents evolve to higher values ...

### Thermodynamics of the MnO-containing slags and …

3-MgO-FeO oxide system, including liquid slag solution and stoichiometric compounds, has been made based mainly on the published IRSID model parameters12–13. The new database has been successfully implemented in the FactSage commercial software15 for phase equilibrium and thermodynamic property calculations. It is worth mentioning that the re ...