Spinel-Containing Refractories Request PDF
As a substitute of carbon-bonding MgOAEAl 2 O 3 spinel offers a good improvement in both physical and chemical properties of MgO-based refractories such as densification slag penetration
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The Impact of In Situ-Formed Spinel on the Porosity of No
The paper focuses on the determination of how in-situ formed magnesia-alumina spinel (MA spinel) content in corundum refractory castables influences the final properties and pore size distribution of no-cement refractory castables. The motivation for this research was the continued pressure on increasing the utility properties of refractory castables namely their corrosion resistance to blast
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USAAlumina-silicon carbide-carbon refractory
A refractory castable comprised of about 45 to about 75 by weight high alumina grain about 2 to about 35 by weight silicon carbide about 1 to about 8 by weight carbon about 1 to about 8 by weight calcium aluminate cement and about 1 to about 10 by weight fine magnesium aluminate spinel the spinel having a grain size of less than about 150 μm (100 Tyler mesh) and being
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FORMATION OF HEXA-ALUMINATE SOLID SOLUTION PHASES
Refractory castables based on Tabular alumina T60/T64 (C1) and white fused alumina (WFA) (C2) were prepared in addition to the synthetic raw mixtures. As shown in Tab. 2 the castables contain 12 wt. pre-formed spinel AR 78 which is a sintered spinel with a phase composition of 100 alumina-rich non-stochiometric spinel.
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Refractory Castable EngineeringSBPMat
Spinel-containing alumina-based refractory castables 1. Introduction 497 2. Formulation design using pre-formed spinel 503 2.1. General features 503 2.2. Post-mortem evaluation of a pre-formed spinel composition 509 2.3. Mastering the microstructure to optimize the pre-formed spinel
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International Colloquium on Refractories (ICR
New calcium aluminate cement for refractory pre-cast shape production. Kyrilis E. Tonnesen T. Telle R. RWTH Aachen University Germany. The effect of the binder and the spinel content on the performance of high-alumina self-flow monolithics. REFRACTORY CASTABLESPROCESSING. Bachmann E. HarbisonWalker International The Netherlands
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Rheology of High Performance Alumina and Spinel
Cement-based refractory mixes are used in a For high alumina and spinel castables the ma-trix is composed of 4 Silica fume or reactive a silica fume containing or a pure alumina based matrix is preferable. In literature it is often stated that silica fume is mandatory in low cement castable matrices to achieve good flowability values. In
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(PDF) Spinel-containing alumina-based refractory castables
Due to their high corrosion resistance to basic slags either pre-formed or in situ spinel (MgAl2O4) containing refractory castables are nowadays widely used as steel ladle linings.
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High Alumina Castable RefractoryRongsheng Refractory
Description of High Alumina Castables Refractory. High alumina castable is a kind of refractory castable which compositions boast high alumina refractory material. There are also some other materials such as high alumina cement silica fume alumina powder and bauxite fine powder.And they are mixed with a certain of proportion according to various construction demand.
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Alumina Magnesia Refractory CastablesRS Kiln Refractory
Accompanied by the increase in the tapping temperature and harsher smelting conditions the service life of the ladle lining is greatly reduced. The ladle adopts Alumina Magnesia Refractory Castables including spinel-containing castables for integral casting which has always been a development trend. Alumina magnesia refractory castable
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Alumina Magnesia Refractory CastablesRS Kiln Refractory
Accompanied by the increase in the tapping temperature and harsher smelting conditions the service life of the ladle lining is greatly reduced. The ladle adopts Alumina Magnesia Refractory Castables including spinel-containing castables for integral casting which has always been a development trend. Alumina magnesia refractory castable
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Slag attack evaluation of in situ spinel-containing
Mar 01 2012 · Based on the total amount of CA 2 and CA 6 predicted to be formed during the corrosion process of the in situ spinel-containing compositions evaluated in this work it is clear that calcium hexaluminate formation is restricted to the matrix region for the hydratable alumina containing castables and that the best corrosion resistance
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Considering the alumina grain size effect on the in situ spinel formation and the associated overall volumetric expansion alumina–magnesia refractory castables containing different alumina
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Magnesium Aluminate Spinel Raw Materials for High
alumina is released from the spinel (figure 4). The alumina reacts with CaO from the slag to form an inter-granular phase calcium hexaluminate (CA6). CA6 is a very refractory phase (onset of melting at 1875°C) and in addition the reaction exhibits a volume expansion causing a reduction in refractory surface porosity and reducing the
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Thermomechanical Behavior of High‐Alumina Refractory
Dec 20 2004 · The thermomechanical behavior of a high‐alumina refractory that contains 10 wt of synthetic spinel has been studied. Results have been correlated with the microstructural and mineralogical evolutions using X‐ray diffraction and scanning electron microscopy as function of
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Melt Shop RefractoriesVesuvius
SPINCAST high alumina spinel containing castables for increased slag resistance Spouts DURAFLO high alumina self-flow castable Inductors MAGNAVIBE spinel-forming magnesia based dry-vibratable material for high powered inductors. KELLUNDITE spinel-forming alumina based dry vibratable material used as a universal inductor lining. Covers
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In‐Depth Microstructural Evolution Analyses of Cement
Calcium hexaluminate (CaO·6Al2O3–CA6) is usually associated as the product reaction between alumina and CA2 (CaO·2Al2O3) in cement‐bonded refractory castables. However
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Alumina Magnesia Refractory CastablesRS Kiln Refractory
Introduction of Alumina Magnesia Refractory Castables Alumina Magnesia Refractory Castables are refractory castables with corundum as aggregate spinel material and corundum powder as a matrix and pure calcium aluminate cement as a binder. Its chemical composition is Al2O3 89 93 MgO 5 8 .
Get PriceMicrostructure and refractory properties of spinel
Jul 01 2010 · The bauxite-based and kaolin-based refractory castables investigated were carefully prepared. They are composed of 90. wt. well-graded (coarse medium and fine) bauxite or kaolin aggregates 10 wt. binding matrix and adequate amount of distilled water.. The binder mixture was calcium aluminate cement (CAC) containing 80 alumina and magnesium-aluminate spinel (MA-spinel
Get PriceMAGNESIA SPINEL BRICKHIGH ALUMINA BRICKREFRACTORY
Ying Kou MCC Refractory is an CHINA MANUFACTURER of Magnesia bricks High Alumina Refractory Bricks company with a diverse range of applications. We cooperate with the well-known Refractory Research Institute in the world such as Wuhan Refractory Research institute Luoyang Academy in the industry to create innovative products designed to
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The Impact of In Situ-Formed Spinel on the Porosity of No
The paper focuses on the determination of how in-situ formed magnesia-alumina spinel (MA spinel) content in corundum refractory castables influences the final properties and pore size distribution of no-cement refractory castables. The motivation for this research was the continued pressure on increasing the utility properties of refractory castables namely their corrosion resistance to blast
Get Price
Study of Spinel-Containing High Alumina Castable with
Abstract. 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
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Melt Shop RefractoriesVesuvius
SPINCAST high alumina spinel containing castables for increased slag resistance Spouts DURAFLO high alumina self-flow castable Inductors MAGNAVIBE spinel-forming magnesia based dry-vibratable material for high powered inductors. KELLUNDITE spinel-forming alumina based dry vibratable material used as a universal inductor lining. Covers
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Spinel-Containing Refractories Request PDF
Spinel-containing alumina-based refractory castables. Article. Full-text available spinel-containing refractory castables with increasing spinel content have been investigated according to
Get PriceIn Situ Spinel Formation in a Smart Nano-Structured Matrix
transformation of the hydrotalcite-containing blended paste into spinel being an e ective ceramic bonding designed for no-cement corundum-spinel refractory castables. In summary the combination of nano-powders of MgO and Al2O3 and water provides a cement and CaO-free binding system designed for alumina-based castables.
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In situ Spinel Expansion Design by Colloidal Alumina
Considering the alumina grain size effect on the in situ spinel formation and the associated overall volumetric expansion alumina–magnesia refractory castables containing different alumina sources were evaluated by the assisted sintering technique. Reducing the size of fine tabular alumina (<200 μm) led to lower expansion levels indicating
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