Slag corrosion of alumina-magnesia-carbon refractory
Oct 15 2020 · 1. Introduction. AMC refractories are widely used as a lining for the metal line and the bottom of steelmaking ladles although the contact with the liquid slag is not continuous contact does occur in certain steps of the process.The attack by molten slag was verified by the authors in a post-mortem study of AMC material that reported work the contribution of the corrosion caused by
Chat OnlineEstudio post-mortem de un hormigón refractario CORE
A post-mortem study allowed to establish the elements diffusion profile inside the refractory as well as its microstructural evolution. This study was carried out by means of X-ray diffraction reflected optical light microscopy and scanning electron microscopy coupled with energy dispersive X-ray analysis.
Chat OnlineThermo-Optical Measuring method (TOM)A high efficient
Post mortem analysis Center Smart (Al2O310 at. CaO45 at. SiO245 at. ) melting point 1275°C Magnesium 2.121 0.051 1.944 3.516 MgO Aluminium 7.574 0.112 6.256 14.310 Al2O3 Silizium 20.109 0.268 15.956 43.018 SiO2 Phosphor 1.443 0.059 1.038 3.307 P2O5
Chat OnlinePost-mortem study of the internal coated SENs (Submerged
The post-mortem study results clearly revealed the formation of a multi-layer accretion. A harmful effect of the SENs decarburization on the accretion thickness was also indicated. In addition the results indicated a penetration of the formed alkaline-rich glaze into the alumina-graphite base refractory.
Chat OnlineNature of MgO and Al2O3 Dissolution in Metallurgical Slags
Nature of MgO and Al 2O 3 Dissolution in Metallurgical Slags PENGCHENG YAN BRYAN A. WEBLER P. CHRIS PISTORIUS and RICHARD J. FRUEHAN The nature of MgO and Al 2O 3 dissolution in metallurgical slags may affect production cost efficiency and product quality.
Chat OnlinePromoted RhPt bimetallic catalyst supported on δ-Al2O3 and
Feb 05 2015 · The present work is focused on the post-mortem characterization and analysis of possible factors influencing catalyst deactivation in a full-scale autothermal reformer for a 1–5 kWe polymer electrolyte fuel cell. The reformer was being fueled with commercial fuels with a sulfur content ranging from 0.5 to 10 ppm (w).
Chat OnlineAn Experimental Study of Submerged Entry Nozzles (SEN
The activation energy for Al2O3-C samples heated at AFR equal to 1.5 for air-fuel and oxygen-fuel combustions were found to be 84.5 KJ/mol and 95.5 KJ/mol respectively during non-isothermal heating in the temperature range 873 K to 1473 K. Keywords Al2O3-C ZrO2-C MgO-C decarburization reaction mechanism. National Category
Chat OnlineStudies on the decarburization of the commercial Submerged
In supplement 3 decarburization behaviors of Al2O3-C ZrO2-C and MgO-C refractory materials constituting a commercial Submerged Entry Nozzle (SEN) have been investigated in different gas atmosphere consisting of CO2 O2 and Ar. The (CO2/O2) ratio values were kept the same as it is in propane combustion flue gas at Air Fuel Ratio (AFR) values
Chat OnlinePOST MORTEM STUDY OF Al2O3-MgO INDUCTION FURNACE
wear and corrosion mechanisms of Al2O3-MgO linings via post mortem analysis. In order to achieve this objective refractory and slag samples were collected from the same induction furnaces after shut down of furnace. Slag samples were analysed by x-ray fluorescence technique to understand their chemical characteristics.
Chat OnlineInfluence of Additives on Slag Resistance of Al2O3‐SiO2
Jan 20 2005 · The microstructures of Al 2 O 3 –SiO 2 –SiC–C refractory matrices with aluminum silicon Si 3 N 4 BN B 2 O 3 and B 4 C additives are characterized before and after a crucible slag test and the phases present are compared to those expected at thermodynamic equilibrium. The carbon content dominates the resistance to CaO–MgO–Al 2 O 3 –SiO 2 slag penetration while the viscosity
Chat OnlinePost-mortem study of the internal coated SENs (Submerged
The post-mortem study results clearly revealed the formation of a multi-layer accretion. A harmful effect of the SENs decarburization on the accretion thickness was also indicated. In addition the results indicated a penetration of the formed alkaline-rich glaze into the alumina-graphite base refractory.
Chat OnlineAuthor s Accepted Manuscript
Keywords C. Corrosion E. Refractories Post-mortem analysis Introduction The use of Alumina-Magnesia-Carbon bricks (Al 2 O 3-MgO-C AMC) in the bottoms and metal lines of ladles has been extended to the steelmaking industry since the 1980s. The main improvement with respect to their precursors MgO-C and Al 2 O 3
Chat OnlineProceedings of the Unified International Technical
DANA G. GOSKI PHD is the Director of Research at Allied Mineral Products in Columbus Ohio. Dr. Goski earned her PhD in Engineering from Dalhousie University Canada. She is a member of The American Ceramic Society s (ACerS) Refractories Division a co-inventor on a number of international patents and an ardent supporter of science and engineering educational outreach activities.
Chat OnlineStudies on the decarburization of the commercial Submerged
In supplement 3 decarburization behaviors of Al2O3-C ZrO2-C and MgO-C refractory materials constituting a commercial Submerged Entry Nozzle (SEN) have been investigated in different gas atmosphere consisting of CO2 O2 and Ar. The (CO2/O2) ratio values were kept the same as it is in propane combustion flue gas at Air Fuel Ratio (AFR) values
Chat OnlineAnalysis and Interpretation of Microstructures after
Corrosion by liquid oxides is one of the most severe modes of degradations which limit the lifetime of the refractory linings. The study of the microstructures of corroded refractories provides essential information. However the interpretation of the microscopic observations is difficult The refractories are multi-component and heterogeneous ceramics The microscopic observations are
Chat OnlineCHARACTERIZATION AND TESTING OF REFRACTORIES FOR
Characterization of Refractories. This work usually involves either the characterization of brand new refractories and/or the post mortem analysis of refractories. Common examples of analysis are corrosion study of silica refractories (i.e. 18) alumina aluminosilicate and AZS refractories (i.e. 19) for glass tank melters.
Chat OnlineAn Experimental Study of Submerged Entry Nozzles (SEN
The activation energy for Al2O3-C samples heated at AFR equal to 1.5 for air-fuel and oxygen-fuel combustions were found to be 84.5 KJ/mol and 95.5 KJ/mol respectively during non-isothermal heating in the temperature range 873 K to 1473 K. Keywords Al2O3-C ZrO2-C MgO-C decarburization reaction mechanism. National Category
Chat OnlineAnalysis and Interpretation of Microstructures after
Corrosion by liquid oxides is one of the most severe modes of degradations which limit the lifetime of the refractory linings. The study of the microstructures of corroded refractories provides essential information. However the interpretation of the microscopic observations is difficult The refractories are multi-component and heterogeneous ceramics The microscopic observations are
Chat OnlineInfluence of Additives on Slag Resistance of Al2O3‐SiO2
Jan 20 2005 · The microstructures of Al 2 O 3 –SiO 2 –SiC–C refractory matrices with aluminum silicon Si 3 N 4 BN B 2 O 3 and B 4 C additives are characterized before and after a crucible slag test and the phases present are compared to those expected at thermodynamic equilibrium. The carbon content dominates the resistance to CaO–MgO–Al 2 O 3 –SiO 2 slag penetration while the viscosity
Chat Online(PDF) Corrosion mechanism of Cr2O3-Al2O3-ZrO2 refractories
MgO). Furthermore a quantitative analysis of main corrosive elements in the corroded/uncorroded interface a detailed post-mortem analysis. the degradation behavior of Al2O3-Ti3AlC2-Si-C
Chat OnlineCorrosion mechanism and kinetic behaviour of refractory
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. Gas bubbles form mainly according to the reaction between (FeO) in slag film and C (s) in the
Chat OnlineAbstractsUNITECR 2017
o16) in-depth analysis of thermal profiles during industrial dry-out comparative study of slag resistance of al2o3-mgo castables containing different lightweight corundum aggregates.. 30 o28) formation and microstructure evolution of intracrystalline corrosion mechanism of amc ladle bricks by post mortem
Chat OnlinePhysical chemical and thermal characterization of alumina
Al2O3-MgO-C (AMC) refractory bricks are used as linings for the sidewalls (metal line) and bottoms of steel-making ladles. Characterization and post-mortem analysis of Al2O3-MgO-C refractories
Chat OnlineSlag corrosion of alumina-magnesia-carbon refractory
Oct 15 2020 · 1. Introduction. AMC refractories are widely used as a lining for the metal line and the bottom of steelmaking ladles although the contact with the liquid slag is not continuous contact does occur in certain steps of the process.The attack by molten slag was verified by the authors in a post-mortem study of AMC material that reported work the contribution of the corrosion caused by
Chat OnlineCorrosion mechanism and kinetic behaviour of refractory
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. Gas bubbles form mainly according to the reaction between (FeO) in slag film and C (s) in the
Chat OnlineAuthor s Accepted Manuscript
Keywords C. Corrosion E. Refractories Post-mortem analysis Introduction The use of Alumina-Magnesia-Carbon bricks (Al 2 O 3-MgO-C AMC) in the bottoms and metal lines of ladles has been extended to the steelmaking industry since the 1980s. The main improvement with respect to their precursors MgO-C and Al 2 O 3
Chat OnlineNature of MgO and Al2O3 Dissolution in Metallurgical Slags
Nature of MgO and Al 2O 3 Dissolution in Metallurgical Slags PENGCHENG YAN BRYAN A. WEBLER P. CHRIS PISTORIUS and RICHARD J. FRUEHAN The nature of MgO and Al 2O 3 dissolution in metallurgical slags may affect production cost efficiency and product quality.
Chat Online
