alumina magnesia refractory castablesspinel containing alumina based refractory castables
Tabular Alumina Refractory Castable RS Refractory
Tabular corundum is an ideal material containing 90-100 alumina for high alumina bricks and amorphous linings. Therefore the tabular corundum is added to the refractory castable which also improves the quality of the refractory castable.
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Effects of TiO2 addition on the expansion behavior of
· Cement-bonded alumina–magnesia refractory castables present excellent properties because of the in situ spinel and calcium hexaluminate formation. However controlling the expansion derived from in situ reactions is essential for keeping the integrity of castables. The present work addresses the effects of TiO 2 addition on the expansion behavior of alumina–magnesia refractory castables
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USACastable refractory containing alumina coarse
A castable refractory which comprises a matrix making up 100 wt in total composed of 3-20 wt of magnesia clinker having a particle diameter smaller than 0.21 mm and containing more than 95 wt of MgO and 0.5-3.0 wt of alumina cement in terms of CaO with the remainder being alumina and 0.1-3 wt of ultrafine powder of amorphous silica and 3-9 wt of alumina coarse grains having a
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Spinel-containing alumina-based refractory
Spinel-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.
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Evolution of an alumina-magnesia/self-forming spinel
Keywords Refractories magnesium aluminate spinel castable alumina-magnesia refractory lining MgAl 2 O 4 Several routes have been followed to develop spinel-containing castables. In the case of MgO-based materials this has been achieved by the inclusion of synthetic spinel grains and/or the addition of alumina to form in-situ spinel
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Reasons for crack propagation and strength loss in
· Reasons for crack propagation and strength loss in refractory castables based on changes in their chemical compositions and micromorphologies with heating special focus on the large blocks alumina–magnesia castables containing 6 wt CAC (6C) 4 wt CAC 2 wt HA (4C2H) 2 wt CAC 4 wt HA (2C4H) or 6 wt HA (6H) 1 .
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EFFECTS OF MnO ADDITIONS ON THE PROPERTIES OF
· The compositions of the alumina-magnesia refractory castables are listed in Table 1. Tabular alumina ( 6 mm) was used as the aggregate. The matrix of castables included fine tabular alumina reactive alumina and cal-cined magnesia. Calcium aluminate cement acted as the binder of castables. Except that 1 silica fume was
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Spinel-containing alumina-based refractory castables
· These spinels have either magnesia rich or stoichiometric composition. In the late 1980 s spinel containing alumina refractories were also developed especially castables for steel ladle lining in Japan. However magnesia rich spinels have shown disadvantages for such applications because they are designed to contain traces of free magnesia.
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Effects of SnO 2 Addition on the Properties of Alumina
· Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO 2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied.
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Performance Requirements of Al2O3-MgO·Al2O3 Refractory
· The relationship between the amount of spinel added and the melt loss index and slag penetration thickness can be obtained for castables containing 10 to 30 MgO·Al2O3. The small thickness of the slag impregnated layer is an important basis for guiding the design formula. Alumina Magnesia Refractory Castable. Get Quotation
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Performance Requirements of Al2O3-MgO·Al2O3 Refractory
· The relationship between the amount of spinel added and the melt loss index and slag penetration thickness can be obtained for castables containing 10 to 30 MgO·Al2O3. The small thickness of the slag impregnated layer is an important basis for guiding the design formula. Alumina Magnesia Refractory Castable. Get Quotation
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Effects of SnO2 Addition on the Properties of Alumina
Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied. The results showed that the addition of SnO2 could have a
Get PriceHydration of refractory oxides in castable bond systems—I
· Alumina–magnesia based castable refractories have superior high temperature corrosion resistance than competing materials such as high alumina castables and have found applications in steel ladles RH degasser and cement kilns.
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Effects of SnO 2 Addition on the Properties of Alumina
· Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO 2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied.
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Effects of SnO2 Addition on the Properties of Alumina
· Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO 2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied.
Get PriceA comparative study between Direct Spinel Addition and
· The major objective of this work is to study the difference in properties of spinel containing high alumina refractory castables prepared by two different methods namely in-situ spinelisation and direct spinel addition. Also the effect of two different types of cement having different alumina composition was observed.
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USARefractory ramming mix containing aluminum
alumina refractory magnesia cement mix Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) ExpiredLifetime Application number US06/072 008 Inventor Richard A. Alliegro Ronald A
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Microsilica-bonded magnesia-based refractory castables
· Microsilica-bonded magnesia-based refractory castables Bonding mechanism and control of damage due to magnesia hydration Der Fakultät für Maschinenbau Verfahrens- und Energietechnik der Technischen Universität Bergakademie Freiberg eingereichte DISSERTATION zur Erlangung des akademischen Grades Doktor-Ingenieur Dr.-Ing. vorgelegt
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Refractory Castable EngineeringSBPMat
· 3.6. Magnesia hydration and its e ect on the performance of MgO-containing compositions 14 3.7. Spinel-containing alumina-based castables 15 3.8. Carbon-containing castables 15 3.9. Designing the microstructure for speci c applications 16 4. Final remarks 17 5. References 17 Chapter 2 Fundamentals on particle dispersion 1. Introduction 21 2.
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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
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WHITE FUSED ALUMINA VERSUS TABULAR ALUMINA
Thermal behavior in relation to different bindings of alumina based castables in a temperature range 20 to 1000 grad C. Zhou Ningsheng / Liu Min / Zhang Sanhua CORROSION MECHANISM OF SPINEL FORMING AND SPINEL CONTAINING REFRACTORY CASTABLES IN LAB AND PLANT CONDITIONS. Molin A. / Molin J. / Podworny J. / Wala ALUMINA MAGNESIA
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Hydration of refractory oxides in castable bond systems—I
· This paper describes a calorimetric study of hydration in hydratable alumina reactive magnesia and alumina-magnesia mixtures which may be used in the bond systems of spinel-based refractory castables. Results on alumina-fumed silica and magnesia-fumed silica mixtures will be reported later. 2. Experimental
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PREMIUM ALUMINA FOR REFRACTORY APPLICATIONS
· binding systems refractory products based on Almatis Tabular Alumina T60/T64 can be applied at temperatures up to 1800 °C. resistance against basic and acidic corrosive media and exhibits a high abrasion resistance with a Mohs hardness of 9 for corundum. Refractories made of tabular alumina are used in many applications in various industries
Get PriceWHITE FUSED ALUMINA VERSUS TABULAR ALUMINA
Thermal behavior in relation to different bindings of alumina based castables in a temperature range 20 to 1000 grad C. Zhou Ningsheng / Liu Min / Zhang Sanhua CORROSION MECHANISM OF SPINEL FORMING AND SPINEL CONTAINING REFRACTORY CASTABLES IN LAB AND PLANT CONDITIONS. Molin A. / Molin J. / Podworny J. / Wala ALUMINA MAGNESIA
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Effects of SnO2 Addition on the Properties of Alumina
Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied. The results showed that the addition of SnO2 could have a
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Effects of SnO2 Addition on the Properties of Alumina
Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied. The results showed that the addition of SnO2 could have a
Get PriceSpinel-containing alumina-based refractory
Spinel-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.
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Effects of TiO2 addition on the expansion behavior of
· Cement-bonded alumina–magnesia refractory castables present excellent properties because of the in situ spinel and calcium hexaluminate formation. However controlling the expansion derived from in situ reactions is essential for keeping the integrity of castables. The present work addresses the effects of TiO 2 addition on the expansion behavior of alumina–magnesia refractory castables
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Hydraulically-bonded monolithic refractories containing a
However the test results demonstrate that the refractory castables according to the present invention have improved control over working and set times as compared to refractory castables containing only hydratable alumina as the binder. EXAMPLE 4. A hydraulically-bonded refractory castable having the following formulation was prepared
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