corrosion of magnesium aluminate spinel rich refractories
EPA1Unshaped alumina spinel refractoryGoogle
An unshaped alumina spinel refractory excellent in spalling corrosion and slag resistances which comprises an alumina spinel clinker having a molar ratio of MgO to Al₂O₃ of 0.14 1.86 to 0.6 1.4 optionally together with spinel clinker with an approximately theoretical composition based on the alumina spinel clinker and the balance of sintered alumina and alumina cement.
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Corrosion Mechanism of MgO–CMA–C Ladle Brick with High
nesia refractories has been developed which contain calcium magnesium aluminate (CMA) cement binder or aggregates to increase the high-temperature properties and corrosion resis- tance by incorporation of magnesium aluminate spinel.
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Al2O3 and MgO Rich Spinel and Influence of Cr2O3 for
The addition of chromium oxide (Cr2O3) to magnesium aluminate spinel (MgAl2O4) refractories results in the formation of a solid solution with spinel phase and increases the degree of densification thus improving the strength and resistance to corrosion and thermal shock of the material. In this research work chromium oxide was added in three
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(PDF) Refractory applications of magnesium aluminate spinel
Jan 01 2010 · Magnesium aluminate spinel (MgAl 2 O 4 ) on account of its attractive high temperature properties and chemical inertness is a commercially important material for the refractory application.
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PREMIUM ALUMINA FOR REFRACTORY APPLICATIONS
These specific interac- tions with corrosive media especially steel slag explain the use of magnesium aluminate spinels in refractory products designed for high corrosion resistance. Furthermore the thermal-shock resistance of refractories can be improved by the addition of high purity sintered spineI.
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Alumina-rich refractory concretes with added spinel
The presence of magnesium spinel in the composition of alumina-rich refractory concretes has clearly improved slag attack behaviour reduced wear rates1–4 and as a consequence provided a longer lifespan for steel plant ladles than other traditional refractory products. Now magnesia (dead burned magnesite) is used as an additive as a means of
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Spinel In situ versus PreformedClearing the Myth
3 is Magnesium-aluminate spinel (MgAl 2O 4) with a stoichiometric ratio of 71 8 Al 2O 3/28 2 MgO. Magnesium-aluminate spinel is a highly refractory mater-ial with a melting point of 2135 °C. A strong feature of all spinels is the tendency to sub-stitutional solid-solutioning where large percentages of one or both of the spinel
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New periclase-magnesium aluminate spinel refractories from
May 22 2013 · The chemistry and distribution of phases formed in a set of six laboratory-prepared magnesia-magnesium aluminate spinel ceramics and in three of their precursor spinel-based compositions sintered at 1600°C and 1760°C respectively are examined and compared. The evaluation of the results is the basis for the industry design of magnesia spinel refractories for new advanced
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Optimization of Thermal Shock Resistance Alumina-Spinel
High-purity alumina-spinel (A-MA) castables are widely used in steel ladles due to their excellent resistance against slag penetration and corrosion. Deflocculated with a polycarboxylate ether and bonded with calcium aluminate cement (CAC) they achieve high strength quickly after installation after firing and as well at all temperatures up to their service temperature. The calcium magnesium
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USAMagnesia-alumina type spinel clinker and
A magnesia-alumina type spinel clinker contains Fe 2 O 3 and TiO 2 at boundaries between crystal grains and a refractory produced by using the clinker has excellent corrosion resistance and cement
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Preparation of magnesium aluminate spinel by auto
Mag-Al spinel is a highly refractory material because of its high melting point. Superior strength at ambient and elevated temperatures better corrosion erosion abrasion resistance and thermal spalling resistance are few of its remarkable properties which makes it an excellent refractory material.
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Improved Corrosion Resistance of Alumina-Spinel Castable
Alumina-spinel castables are usually applied as a refractory lining of steel ladles in regions where both volumetric stability and corrosion resistance are required. However the addition of the traditional calcium aluminate cement as a binder agent in those refractories leads to residual expansion and reduces the basic slag resistance mainly
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Magnesium Aluminate Spinel Ceramics Containing
for refractory applications for example in the steel in-dustry because of its suitable high-temperature proper-ties such as high strength at elevated temperatures and high resistance to basic slags 1 2. Besides the stoichiomet-riccomposition(71.8wt Al 2O 3 28.2wt MgO) mag-nesia-rich and alumina-rich magnesium aluminate spinel materials exist
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Post-Mortem Investigation of a Steel Ladle Repair Mix
Magnesium Aluminate Aggregates Chr. Wöeyer M. Szepizdyn R.-M. Mineau J. Gao Y. Zhou (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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Magnesium Aluminate Spinel Raw Materials for High
Magnesium aluminate spinels are increasingly being used in refractories for steel-making due to their particular combination of resistance to steel-making slag corrosion thermal shock resistance and excellent hot strength. Spinel refractories were initially (mid-1960 s) produced by the in-situ reaction of alumina with periclase in magnesia
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Mg-Al refractories_Steel Pipe knowledge_News_World Steel Tube
magnesium aluminate spinel is one of the key problem related to the Mg-Al spinel brick can achieve the right effect. Laboratory test screening and the introduction of the relevant information the magnesium-rich spinel in 20 to 30 of its corrosion resistance resistance to structural spalling resistance and thermal vibration are better.
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R. Lodha T. Troczyski and G. Oprea "Synthesis and Sintering of Magnesium Aluminate Spinel" International Conference on Refractories Kolkata India February 7-9 2008 G. Oprea G. Ye and T. Troczynski "Characterisation of Binder Systems for Spinel Bonded Basic Castables" 10th European Ceramic Society Int Conference Berlin Germany
Get PriceMagnesium Aluminate Spinel Ceramics Containing
for refractory applications for example in the steel in-dustry because of its suitable high-temperature proper-ties such as high strength at elevated temperatures and high resistance to basic slags 1 2. Besides the stoichiomet-riccomposition(71.8wt Al 2O 3 28.2wt MgO) mag-nesia-rich and alumina-rich magnesium aluminate spinel materials exist
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New periclase-magnesium aluminate spinel refractories from
May 22 2013 · The chemistry and distribution of phases formed in a set of six laboratory-prepared magnesia-magnesium aluminate spinel ceramics and in three of their precursor spinel-based compositions sintered at 1600°C and 1760°C respectively are examined and compared. The evaluation of the results is the basis for the industry design of magnesia spinel refractories for new advanced
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(PDF) Effect of spinel content on the properties of
The major application areas of spinel possible erosion and corrosion for the bricks in many refractories5 are transition and burning zones of cement applications. Gonsalves and others studied9 various rotary kilns as magnesia–spinel refractories side walls magnesia–spinel bricks for cement rotary kiln applica-
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USAAlumina-spinel type monolithic refractories
Alumina-spinel monolithic refractory having excellent spalling resistance corrosion resistance and slag penetration resistance. The alumina-spinel refractory contains an alumina-spinel clinker having a MgO Al 2 O 3 molar ratio ranging from 0.14 1.86 to 0.6 1.4 which can be simultaneously used with a spinel clinker having a close to theoretical composition with the balance consisting of an
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GP-RCP 004 R09 1217 SDS 340 NEU -Almatis
Magnesium Aluminate Spinels Product Information Manufactured from high purity raw materials Magnesium Aluminate Spinel has excellent refractory properties and is recognized as a superior refractory aggregate. The development of spinel has followed two distinct paths as prescribed by these two separate industry needs
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USAAlumina-spinel type monolithic refractories
Alumina-spinel monolithic refractory having excellent spalling resistance corrosion resistance and slag penetration resistance. The alumina-spinel refractory contains an alumina-spinel clinker having a MgO Al 2 O 3 molar ratio ranging from 0.14 1.86 to 0.6 1.4 which can be simultaneously used with a spinel clinker having a close to theoretical composition with the balance consisting of an
Get Price(PDF) Industrial applications of refractories containing
Magnesium aluminate spinel is used as refractory materials in cement rotary kiln steel teeming ladles 5 18 19 checker work of glass tank furnace regenerators 4 14 . Due to improved corrosion
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Preparation of magnesium aluminate spinel by auto
Mag-Al spinel is a highly refractory material because of its high melting point. Superior strength at ambient and elevated temperatures better corrosion erosion abrasion resistance and thermal spalling resistance are few of its remarkable properties which makes it an excellent refractory material.
Get Price
Alumina-rich refractory concretes with added spinel
The presence of magnesium spinel in the composition of alumina-rich refractory concretes has clearly improved slag attack behaviour reduced wear rates1–4 and as a consequence provided a longer lifespan for steel plant ladles than other traditional refractory products. Now magnesia (dead burned magnesite) is used as an additive as a means of
Get Price
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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Influence of magnesium aluminate spinel powder content on
Dec 15 2017 · The effect of the amount of magnesium aluminate spinel powder (MASP) in lightweight periclase-spinel refractories on the cement clinker corrosion and adherence properties was investigated by the static crucible test and sandwich test.
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Post-Mortem Investigation of a Steel Ladle Repair Mix
Magnesium Aluminate Aggregates Chr. Wöeyer M. Szepizdyn R.-M. Mineau J. Gao Y. Zhou (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.
Get Price
