(PDF) Thermomechanical Behavior of High-Alumina Refractory
Theoretical positions in the CaO–MgO–Al2O3 ternary phase equilibrium diagram of both the refractory and the matrix. Partial view at 1650°C in the Al2O3-rich zone (after De Aza3). October 2000 Thermomechanical Behavior of High-Alumina Refractory Castables with
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How to Improve the Performance of Refractory Castables
Sep 24 2020 · With the continuous progress in the production and use of refractory castables it is necessary to improve the wear resistance and thermal shock resistance of refractory castables.The research and development of new refractory castables with excellent high-temperature strength good thermal shock resistance and good corrosion resistance will help improve the life of cement kiln linings.
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Study of Reactive Impregnation and Phase Transformations
Corrosion of refractories results from reactive transport namely transport of agents and chemical reactions of these agents with impregnated medium. On one hand the transport involves either diffusion or impregnation depending on the state of the corrosive agents and the microstructure of the host media. On the other hand chemical reactions may be very numerous and complex.
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MgO-Al2O3-C Series RefractoriesAllied Metallurgy
Using top quality bauxite or corundum as aggregates phenolic resin as binding agent and emphasizing matrix AMR series of Al 2 O 3-MgO -C bricks are offered in a range of MgO contents.They can be applied for ladle wall bottom and other parts showing the features of good corrosion resistance and spalling resistance as well as high strength etc.
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Corrosion Mechanisms in Refractory Castables by Liquid
In this work three refractory castables (A B and C) are being characterized and studied to compare their properties and determine their corrosion mechanisms in the presence of slag obtained from a steel furnace. The chemical composition of the slag consists mainly of CaO SiO 2 alumina and Fe 2 O 3.
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Corrosion of RefractoriesResearchGate
The aim of this study is to investigate the corrosion process of the refractory Al2O3-ZrO2–C slide gate plate caused by chemical interactions with secondary refining slag.
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Slag corrosion characteristics of MgO-based refractories
MgO-based refractories have been widely used in metallurgical processes. However their service lives are limited by the corrosion and penetration effects of the molten slag. To figure out the slag resistance of various MgO-based refractories MgO–MgAl2O4 MgO–CaO and MgO–C refractories were chosen in this work and their slag corrosion characteristics under vacuum electromagnetic
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Discussion on the Problems of Aluminum Magnesium Castables
Nov 28 2020 · From the applicability of pure Al2O3-MgO castables pure Al2O3-MgO castables with different compositions and characteristics can be used to refine any part of the ladle low-corrosion zone (melt pool wall ladle bottom and impact zone).
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Improvement in Slag Resistance of No-Cement Refractory
Calcium aluminate cement (CAC) is by far the most used binder in Al2O3-MgO refractory castable formulations and the corrosion resistance of spinel containing cement bonded castables has been extensively investigated 7–9 . Since the use of no-cement refractory castables (NCCs) has been
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Advanced Boron-Containing Al2O3–MgO Refractory Castables
Advanced Boron-Containing Al2O3–MgO Refractory Castables. the slag corrosion cup tests were carried out. mineralizer addition was the greater volumetric expansion of the Al2O3-MgO
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Effects of Atmospheric Conditions on Slag Corrosion
By adopting dynamic induction furnace corrosion test the corrosion mechanism of lightweight Al2O3-MgO castable with different environmental oxygen partial pressure was investigated through macro- and micro-analysis XRD and thermodynamic simulation. The atmospheric condition was set to P(O2) = 0.21 atm or P(Ar) = 1.0 atm. The attained results showed that a reduced slag corrosion but
Chat OnlineA Review on Recent Advances on Magnesia-Doloma
In this study we reviewed all effort that done for improving the hydration resistance of MgO-CaO refractories by application of Nano-ad-ditives with an emphasis on the beneficial the use of additives nanoparticle for reduction of environmental pollution by various industries which used of MgO-CaO refractory bricks.
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Slag Resistance of Al2O3–MgO Refractory Castables in
In the present work the main corrosion mechanisms of an alumina–magnesia castable in two environmental conditions (oxidizingpO 2 = 0.21 atm—or reducingpO 2 = 10 −15 atm— atmosphere) were evaluated by means of scanning electron microscopy and EDS analyses of the corroded samples and thermodynamic simulations. The attained
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Discussion on the Problems of Aluminum Magnesium Castables
Nov 28 2020 · From the applicability of pure Al2O3-MgO castables pure Al2O3-MgO castables with different compositions and characteristics can be used to refine any part of the ladle low-corrosion zone (melt pool wall ladle bottom and impact zone).
Chat OnlineThe corrosion of refractory castables Request PDF
Abstract Experiments on the corrosion of alumina based refractory castables containing 1 2 5 and 10 mass- of cement and 10 mass- of spinel were conducted in an induction furnace at 1550 1650
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Oxidation Mechanism of C in MgO–C Refractory Bricks
Kinetics of oxidation of MgO–C refractory bricks containing 14.3 graphite 80.9 magnesia and 4.8 phenolic resin is investigated comprehensively. Effect of temperature and grain size distribution on the rate of oxidation of graphite is evaluated by application of a mathematical model developed on the basis of shrinking core/progressive
Chat OnlineCorrosion mechanism of commercial doloma refractories in
AbstractThe dissolution of three doloma based refractories in liquid CaO–Al2O3–SiO2–MgO slag was studied. Cylindrical refractory specimens of doloma carbon bonded doloma and magnesia doloma were rotated in a stationary crucible of molten slag under forced convection conditions. Slag composition temperature rod rotation speed and rod immersion time were varied.
Chat Online(PDF) Corrosion of High Alumina Spinel Castables by Steel
The slag resistance of Al2O3–spinel Al2O3–MgO and high-Al2O3 castables was tested using a gas-fired rotary slag test furnace and BOF slag (CaO/SiO2=3.8 Fe2O3=33.4 wt. ). The spinels used in
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Corrosion mechanism and kinetic behaviour of refractory
CORROSION MECHANISM KINETIC BEHAVIOUR OF REFRACTORY MATERIALS 343 corrosion mechanisms. As a result of different MgO and graphite wettability by the slag and metal phase the metal creeping up and formation of slag film is a cyclic process that results in the progress of the local corrosion of MgO-C refractory.
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Analysis and Prediction of Corrosion of Refractory
Oct 23 2020 · A thermodynamics method was used to study the thermodynamic properties of three common sodium salts (NaCl Na2CO3 and Na2SO4) on the corrosion of refractory materials (MgO·Cr2O3 MgO·Al2O3 Al2O3 MgO and Cr2O3). The results determined that MgO has the best corrosion resistance and is not corroded by the three sodium salts.
Chat OnlineSpinel-Coated Graphite for Carbon Containing Refractory
J. Am. Ceram. Soc. 92 8 1895–1900 (2009) DOI 10.1111/j..2009.03133.x r 2009 The American Ceramic Society Journal Spinel-Coated Graphite for Carbon Containing Refractory Castables Sunanda Mukhopadhyay w Sarbasree Dutta Sheikh A. Ansar Sumita Das and Susmita Misra Department of Chemical Technology University of Calcutta Kolkata 700 009 India Oxidation
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The corrosion resistance of microsilica-containing Al2O3
This work focuses on the evaluation of the corrosion behavior of Al2O3-MgO cement-bonded castables based on thermodynamic calculations in order to understand the reaction steps and some
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Corrosion Mechanism Analysis of Al2O3-SiC-C Castable
The present study aims to analyze the corrosion mechanism of Al 2 O 3 -SiC-C castables for blast furnace main trough. The anti-oxidation and corrosion properties of the castable caused by slag were studied with residual lining investigation and microstructure analysis.
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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 (English) Bouchetou M.L. / Prigent P. / Poirier J. in Refractories in a Shifting Globalized World UNITECR Unified International Technical Conference on Refractories Biennial Worldwide Congress 11
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Corrosion Mechanisms in Refractory Castables by Liquid
In this work three refractory castables (A B and C) are being characterized and studied to compare their properties and determine their corrosion mechanisms in the presence of slag obtained from a steel furnace. The chemical composition of the slag consists mainly of CaO SiO 2 alumina and Fe 2 O 3.
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Refractory castable engineering Semantic Scholar
A Study on the Phosphate-Bonded High-Alumina Castable — Effect of MgO Addition. R. Sarkar U. K B4C mineralizing role for mullite generation in Al2O3-SiO2 refractory castables. A. P. Luz J. H. Gagliarde C. Aneziris V Effect of Cr2O3 addition on corrosion mechanism of refractory castables for waste melting furnaces and concurrent
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Alumina Magnesia Refractory CastablesRS Kiln Refractory
The characteristics of alumina-magnesia spinel refractory castables are high-temperature resistance strong structural spalling resistance resistance to chemical corrosion of steel slag resistance to rapid cold and rapid heat non-sticking to molten steel and resistance to erosion. Use the pouring vibration method for construction.
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Corrosion Mechanism Analysis of Al2O3-SiC-C Castable
The present study aims to analyze the corrosion mechanism of Al 2 O 3 -SiC-C castables for blast furnace main trough. The anti-oxidation and corrosion properties of the castable caused by slag were studied with residual lining investigation and microstructure analysis.
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Thermodynamic simulation models for predicting Al2O3–MgO
Dec 01 2011 · The chemical corrosion of two Al 2 O 3 –MgO castables (containing distinct binder sources hydratable alumina or calcium aluminate cement) were evaluated in this work via thermodynamic calculations.
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Advanced Boron-Containing Al2O3–MgO Refractory Castables
Advanced Boron-Containing Al2O3–MgO Refractory Castables. the slag corrosion cup tests were carried out. mineralizer addition was the greater volumetric expansion of the Al2O3-MgO
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