an approach for modeling slag corrosion of lightweightinvestigations on the properties of al2o3 mgo refractory
An Integrated Approach to Coal Gasifier Testing Modeling
This paper describes an integrated approach to provide the experimental data and engineering models needed to better understand how to control gasifier operation for extended refractory life. The experimental program includes slag viscosity testing and measurement of slag penetration into refractories as a function of time and temperature.
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Modelling of slag flow and prediction of corrosion state
Models for slag flow and refractory brick heat transfer were built and various models of refractory brick corrosion rate were derived in detail. CaO-Al2O3-MgO slag. For that MgO-C refractory
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Recycling Practices of Spent MgO-C RefractoriesJournal
The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated. The economic quality of spent refractories and products made from it the ease of implementation of a recycling practice and the interest of steel melt shops were considered. It was decided that the best option of most EAF shops would be to recycle spent MgO-C refractory as a
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Slag Behavior in Gasifiers. Part II Constitutive Modeling
The viscosity of slag and the thermal conductivity of ash deposits are among two of the most important constitutive parameters that need to be studied. The accurate formulation or representations of the (transport) properties of coal present a special challenge of modeling efforts in computational fluid dynamics applications. Studies have indicated that slag viscosity must be within a certain
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(PDF) Modeling of Slagging in Industrial Furnace A
As input conditions for the slag model the heat fluxes slag mass flow rates and gas temperatures can be integrated from the coupled CFD code. Seggiani 11 in his 1D modeling illustrates an input-output variables scheme of the slag model coupled with 3D CFD code as shown in figure 4. Figure 3 Process involved in slagging 10 .
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Papersrefractories-worldforum
Slag Corrosion of Preceramic Paper Derived Multilayer Oxide Refractory. Björn Gutbrod Matthias Göbbels Nahum Travitzky Peter Greil Andreas Richter. Volume 4 Issue 4 Pages 103109. Keywords preceramic paper multi-layered refractories slag corrosion. Abstract References Full Article
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Materials Free Full-Text Numerical Modeling for
The purpose of this work is to simulate the powder compaction of refractory materials using the discrete element method (DEM). The capability of two cohesive contact models implemented in different DEM packages to simulate the compaction of a mixture of two refractory materials (dead burnt magnesia (MgO) and calcined alumina (Al2O3)) was analyzed and the simulation results were compared
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The development of a thermodynamic model for Al2O3–MgO
Mar 01 2009 · Modeling the corrosion of Al 2 O 3 –MgO castable by a CaO rich slag The aim of this study is to simulate a real case of refractory attack by a slag. The approach is to apply the method from simplified cases (3 or 4 oxides) to real cases (Table 2) and to observe the role of the new oxides.
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Slag conditioning effects on MgO–C refractory corrosion
Sep 01 2013 · An enhanced modeling simulation (previously developed by the authors ) was used in this investigation.Initially 100 g of slag (S) and 100 g of the refractory (R) were considered in the first reaction stage between these two materials.After the first reaction step the resulting liquid Slag (S A) was again put in contact with the same amount (100 g) of the original refractory composition and
Chat OnlineDetermination of dissolution time of Al2O3 and MgO
Jul 16 2003 · The dissolution of Al 2 O 3 and MgO inclusions in synthetic CaO‐Al 2 O 3 ‐MgO slags have been investigated in situ with a confocal scanning laser microscope (CSLM). The dissolution mechanisms were elucidated by using analytical‐rate expressions. A set of parameters is introduced to distinguish between reaction control and diffusion control of the dissolution process.
Chat OnlineAn Integrated Approach to Coal Gasifier Testing Modeling
This paper describes an integrated approach to provide the experimental data and engineering models needed to better understand how to control gasifier operation for extended refractory life. The experimental program includes slag viscosity testing and measurement of slag penetration into refractories as a function of time and temperature.
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CONGRESS UNITECR 2017
Comparative study of slag resistance of al2o3-mgo castables containing different lightweight corundum aggregates Fabrication and properties of si3n4 fiber material in a novel method Steel ladle energy savings by refractory lining design
Chat Online(PDF) The pO-Index and R Ratio Gap Methods for the
The EDS analysis (X_EDS termine the corrosion probability of refractory materials in INCA Oxford Inst. Hillsboro OR) evaluated the average contact with melts is the ratio R of the charges represented by chemical composition of the glassy phase found in the as- the network-dwelling cation to the number of A131 ions 14 received refractory
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Papersrefractories-worldforum
Slag Corrosion of Preceramic Paper Derived Multilayer Oxide Refractory. Björn Gutbrod Matthias Göbbels Nahum Travitzky Peter Greil Andreas Richter. Volume 4 Issue 4 Pages 103109. Keywords preceramic paper multi-layered refractories slag corrosion. Abstract References Full Article
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Papersrefractories-worldforum
Slag Corrosion of Preceramic Paper Derived Multilayer Oxide Refractory. Björn Gutbrod Matthias Göbbels Nahum Travitzky Peter Greil Andreas Richter. Volume 4 Issue 4 Pages 103109. Keywords preceramic paper multi-layered refractories slag corrosion. Abstract References Full Article
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Papersrefractories-worldforum
Slag Corrosion of Preceramic Paper Derived Multilayer Oxide Refractory. Björn Gutbrod Matthias Göbbels Nahum Travitzky Peter Greil Andreas Richter. Volume 4 Issue 4 Pages 103109. Keywords preceramic paper multi-layered refractories slag corrosion. Abstract References Full Article
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Study of Al2O3 MgO Refractory Castables Corrosion by
Study of Al2O3-MgO Refractory Castables Corrosion by Secondary Metallurgy Steel Ladle Slags Effect of aluminium addition on properties of Al2O3-SiC-C dry ramming mixes for BF trough. Wang Zhanmin / Cao Xiying / Wang Thermochemical modeling of EAF slags and refractory/slag equilibria. Reiter Viktoria / Melcher Franz / Harmuth
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Chemical wear of Al2O3–MgO–C bricks by air and basic slag
May 01 2015 · Basic slag corrosion. The chemical wear of AMC refractories by a typical ladle slag was studied at 1450 °C in air employing the static cup test. Cubes 5 cm in length with a whole 3.6–3.7 cm in diameter and 2.3–2.5 cm in height into which the slag in powder was placed were used for the corrosion
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(PDF) The pO-Index and R Ratio Gap Methods for the
The EDS analysis (X_EDS termine the corrosion probability of refractory materials in INCA Oxford Inst. Hillsboro OR) evaluated the average contact with melts is the ratio R of the charges represented by chemical composition of the glassy phase found in the as- the network-dwelling cation to the number of A131 ions 14 received refractory
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Modeling Entrained Flow Gasifiers
Gasifier Slag Viscosity Model. 9 Derived for a range of coal ashes Curve fit as a function of SiO2 TiO2 Al2O3 Fe2O3 CaO FeO MgO Na2O K2O and temperature. References Kalmanovitch D.P. And Frank M. "An Effective Model of Viscosity of Ash Deposition Phenomena " in Proceedings of the Engineering Foundation
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Fire summer schoolFIRE
Fire summer school jitzesinnema T14 17 56 02 00. The University of Orleans welcomed from June 17 to 21 2013 the first "International Summer School" of the federation FIRE. The FIRE aims to • Train students (Master and PhD level) by offering educational programs coordinated between the various university centers of the network.
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Lvping FU Wuhan University of Science and Technology
Slag corrosion resistance of lightweight magnesia-based refractories with micro/nano-sized pores under a static magnetic field is investigated. They exhibited excellent slag resistance under static
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Determination of dissolution time of Al2O3 and MgO
Jul 16 2003 · The dissolution of Al 2 O 3 and MgO inclusions in synthetic CaO‐Al 2 O 3 ‐MgO slags have been investigated in situ with a confocal scanning laser microscope (CSLM). The dissolution mechanisms were elucidated by using analytical‐rate expressions. A set of parameters is introduced to distinguish between reaction control and diffusion control of the dissolution process.
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Lvping FU Wuhan University of Science and Technology
Slag corrosion resistance of lightweight magnesia-based refractories with micro/nano-sized pores under a static magnetic field is investigated. They exhibited excellent slag resistance under static
Chat OnlineInduced Electro-Deposition of High Melting-Point Phases on
AbstractMgO–C refractory was polarized across the slag-refractory interface at a voltage of 8 V in a synthetic CaO–Al2O3–SiO2(MgO) Slag at 1773 K. A deposition layer mainly composed of dicalciumsilicate (2CaO.SiO2) or spinel (MgO.Al2O3) with several hundred microns thick was achieved by cathodic polarization. However the anodic decay was accelerated in comparison to the cathodic
Chat OnlineMaterials Free Full-Text Numerical Modeling for
The purpose of this work is to simulate the powder compaction of refractory materials using the discrete element method (DEM). The capability of two cohesive contact models implemented in different DEM packages to simulate the compaction of a mixture of two refractory materials (dead burnt magnesia (MgO) and calcined alumina (Al2O3)) was analyzed and the simulation results were compared
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United European refractories meet the world UNITECR 07
Study of Al2O3-MgO Refractory Castables Corrosion by Secondary Metallurgy Steel Ladle Slags. Bouchetou Effect of aluminium addition on properties of Al2O3-SiC-C dry ramming mixes for BF trough. Wang Zhanmin / Cao Xiying / Wang Thermochemical modeling of EAF slags and refractory/slag equilibria. Reiter Viktoria / Melcher Franz
Chat OnlineAbstractsUNITECR 2017
o14) change of properties and hydration kinetics of ca and ca2 by o27) comparative study of slag resistance of al2o3-mgo castables containing different lightweight corundum aggregates.. 30 o28) formation and microstructure evolution of intracrystalline o37) refractory corrosion
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Patrick WollantsAcademia.edu
The corrosion behaviour of magnesia-chromite refractory by an alumina-rich (15–20wt. ) stainless steelmaking slag is investigated by rotating finger tests in a vacuum induction furnace. The influence on the refractory wear of the process temperature corrosion time and in particular the high Al2O3 content in the slag is discussed.
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(PDF) Slag Behavior in Gasifiers. Part I Influence of
The main challenge of all these models is their validity over a limited composition and temperature range and their accuracy for different slag systems (e.g. Kalmanovitch model best predicts western coal slag above 1350 °C 77 ). To predict the viscosity of the crystalline phase slags Annen s or Einstein s models were used 68 76 .
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