Corrosion Mechanism of A Density Reduced Steel Ladle
Steel ladle linings with spinel containing or spinel forming high alumina refractories in the metal zone wall and bottom are the state of the art 1–3 While magnesia carbon refractories potentially pollute steel with carbon 4 the high purity and carbon free alumina spinel refractories facilitate the production of ultra low carbon steel
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Microstructural analysis of corroded alumina spinel
Microstructural analysis indicates that the corrosion of alumina spinel castables by a liquid steel ladle slag involves initial reaction of CaO in the slag with alumina fines in the refractory bond The slag becomes saturated in CaO and Al 2 O 3 and CA 2 is
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Corrosion of alumina magnesia castable by high manganese
With the prolongation of smelting time the thickness of the reaction area increased and a number of molten steel droplets were entrained into the refractory castable high manganese steel under the dynamic conditions causing the formation of an emulsification layer between the refractory castable and high manganese steel Some refractory particles were loosed and dropped into the reaction layer which accelerated the erosion of the refractory castable
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Steel Ladle Refractory CastableRongsheng Refractory
Al2O3 MgO C castable can produce magnesia alumina spinel and significantly enhance corrosion resistance and spall resistance of refractory material greatly prolong the service life of steel ladle 6 Steel Ladle Alumina Magnesia Castable
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Corrosion resistance of alumina magnesia castable to
The corrosion resistance of alumina magnesia castable to a basic slag was evaluated to d the highly resistive castable composition for steel processing Stable solid phases were CA6 alumina and spinel after 〉ing of the castable of Al 2O
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Optimization of Properties for Alumina Spinel Refractory
Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2 view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the enhanced properties of materials especially
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high alumina castable high alumina refractory castable
High alumina refractory castable have the characteristics high desity low porosity rate good hot strength high refractoriness and high refractoriness under load It is strong in mechanical spalling resistance shock resistance and corrosion resistance This product is widely used in thermal equipments heating furnace in metallurgical
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Optimization of Properties for Alumina Spinel Refractory
Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2
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Acid Resistance CastableRongsheng Refractory
Acid Resistant Castables Definition The acid resistant castable is made up of 60 70 of acid resistant aggregate 30 40 of powder and 13 16 of sodium silicate solution with density of 1 38 1 42g/cm3 When the agent is added the amount of the refractory material which is 10 to 12 of the mass of the sodium silicate solution and which is
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thermodynamically analyzed the stability of alumina magnesia and alumina spinel castables in steel slags reporting that castables with a large amount of spinel are supposed to have a better slag resistance whereas the formation of CA6 and CA2 CaAl 4O 7 layers at a low temperature has a positive effect on the corrosion resistance
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Effect of spinel content on slag attack resistance of high
More recently Korgul et al 24 carried out a microstructural study on corroded alumina spinel castable refractories Sarpoolaky et al 25 showed the influence of the grain phase on slag corrosion of low cement castable refractories and Ko 26 examined the influence of the characteristics of spinels on resistance to slag attack in Al 2 O 3 MgO and Al 2 O 3 spinel castables
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Spinel containing alumina based refractory castables
Instead of pre reacted spinel these castables contain free magnesia in the matrix fines which form spinel by reacting with alumina during use at high temperatures in situ spinel formation Spinel forming castables have shown advantages when compared to spinel containing ones in steel ladle side wall lining and have become a common material for this region in the past 20 years
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Study of Spinel Containing High Alumina Castable with
High alumina castable with presynthesized and in situ spinel formation is studied using two different lime containing high alumina cements Vibratable castable compositions were studied by conventional processing using a distribution coefficient of 0 29 and heat treatments at 110 900 and 1500°C Slightly lower density and strength values were found for in situ spinel forming compositions
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Optimization of Properties for Alumina Spinel Refractory
1 Introduction Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2 view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the enhanced properties of
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Corrosion of high alumina spinel castables by steel ladle
The application of high alumina materials with additions of spinel and/or spinel forming magnesia as wear linings in steel ladles has increased in recent years Resistance to steel slag is the most important criterion when selecting a suitable material
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Corrosion of alumina magnesia castable by high manganese
As shown in Fig 2 the interaction between the refractory and high manganese steel increased with the prolongation of smelting time The isolation and emulsification layers were formed by the reaction of the refractory and high manganese steel The high manganese steel was emulsified into the reaction area and formed an emulsification layer under dynamic smelting resulting in the
Get PriceMicrostructural analysis of corroded alumina spinel
Microstructural analysis indicates that the corrosion of alumina spinel castables by a liquid steel ladle slag involves initial reaction of CaO in the slag with alumina fines in the refractory bond The slag becomes saturated in CaO and Al 2 O 3 and CA 2 is
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Development of Refractory Materials for Ladle LiningRS
In addition alumina magnesia castables are heavy materials with high bulk density and large thermal conductivity which are not conducive to the development of lightweight ladle and the improvement of thermal insulation Beginning in 2017 high alumina castables have been used on the ladle with a bulk density of 2 453 2 55g/cm3
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Acid Resistance CastableRongsheng Refractory
Acid Resistant Castables Definition The acid resistant castable is made up of 60 70 of acid resistant aggregate 30 40 of powder and 13 16 of sodium silicate solution with density of 1 38 1 42g/cm3 When the agent is added the amount of the refractory material which is 10 to 12 of the mass of the sodium silicate solution and which is
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Corrosion Mechanism of A Density Reduced Steel Ladle
Refractory monolithics for steel ladle linings are typically products with low porosities and high bulk densities They achieve high temperature penetration and corrosion resistance Despite the high density of these products which is due to the low porosity of the aggregates their matrices still exhibit a high amount of pores Since calcium magnesium aluminate CMA has already proven its
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Effect of reclaimed bauxite on andalusite based refractory
andalusite bauxite recycling and re use refractory castables apparent porosity bulk density static corrosion test Introduction Alumina based refractories can be classified into low alumina containing less than 50 Al 2 O 3 and high alumina or bauxite containing between 50 and 90 Al 2 O 3 High alumina refractories have
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PDF Microstructure and phase evolution of alumina–spinel
Generally In steel industry there is a trend to increase the use of high refractory castables can be considered as composites with the alumina refractory castables containing spinel MgAl2O4 bonding phase being the matrix and aggregates being because of their higher refractoriness and of their better reinforcement particles 2 14
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Influence of Spinel on the Fracture Energy of Refractory
The specific fracture energy of alumina spinel refractory castables was studied by the wedge splitting method in this paper The influence of synthetic spinel on the specific fracture energy of aluminamagnesia refractory castables was investigated In situ formation spinel was replaced by sintering spinel as the synthetic spinel The experimental results indicated that the specific fracture
Get PricePDF Thermomechanical Behavior of High Alumina Refractory
J Am Ceram Soc 83 10 2481–90 2000 journal Thermomechanical Behavior of High Alumina Refractory Castables with Synthetic Spinel Additions Fabien Simonin † Christian Olagnon † Sandrine Maximilien and Gilbert Fantozzi Institut National des Sciences Applique´es INSA Groupe d Etudes de Me´tallurgie Physique et de Physique des Mate´riaux GEMPPM UMR 5510 F69621
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Optimization of Properties for Alumina Spinel Refractory
Alumina magnesia and alumina spinel castables have been widely used in steel ladle linings below the slag zone the well block of purging plugs and injection lances due to their excellent slag resistance and mechanical properties 1 2 In view of the increasing ratio of scrap to steel higher working temperature and prolonged refining time the enhanced properties of materials especially for the slag
Get PriceSpinel containing alumina based refractory castables
Due to their high corrosion resistance to basic slags either pre formed or in situ spinel MgAl 2 O 4 containing refractory castables are nowadays widely used as steel ladle linings Nevertheless whereas the pre formed spinel castables present high volumetric stability and a well known processing technology the in situ spinel castables still require further understanding due to the
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Improved Corrosion Resistance of Alumina Spinel
tions by the authors 7 8 even alumina Improved Corrosion Resistance of Alumina Spinel Castable by Colloidal Alumina Addition E Y Sako M A L Braulio E Zinngrebe S van der Laan V C Pandolfelli Alumina spinel castables are usually applied as a refractory lining of steel ladles in regions where both volumetric stability and corrosion
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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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Effect of spinel content on slag attack resistance of high
High alumina refractory castables based on the Al 2 O 3 MgO CaO diagram ternary system were prepared using tabular alumina white electrofused corundum calcined alumina synthetic spinel dead burned magnesia dolomite and calcium aluminate cement as starting raw materials Two kinds of slags with 9 02 and 4 14 CaO/SiO 2 ratios were studied for slag resistance by means of crucible tests
Get PriceInfluence of Exposure Temperature on Degradation of
Corrosion rate of refractory increases as the temperature increases and viscosity of slag decreases The slag of low viscosity can more easily penetrate into the refractory materials and it causes the refractory degradation Thus the corrosion and/or erosion of refractory materials should be thoroughly evaluated under steelmaking conditions In this study the experiments were conducted using
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Reaction behavior of slag and spinel in steel ladle castables
Reaction behavior of slag and spinel in steel ladle castables The difference in corrosion behavior between alumina spinel and alumina magnesia castables in a steel slag was investigated Japan 99 9 < and high purity alumina Sumitomo Chemicals Co Ltd Japan AKP 30 99 99 < The powders were mixed at a desired composition by ball
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Although the addition of natural periclase MgO increases the porosity it has been determined that it also decreases the slag corrosion of the refractory Abstract The application of high alumina materials with additions of spinel and/or spinel forming magnesia as wear linings in steel ladles
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Fused Spinel Alumina Magnesia Spinel Spinel Refractory
Fused Spinel Alumina Magnesia Spinel is a highly recommended refractory raw material Use our high quality pre reacted ALUMINA MAGNESIA SPINEL for developing high purity refractories in both monolithic and brick form Our high quality Fused Spinel has high bulk density great color strong resistance to corrosion and anti detonation
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