(PDF) 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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(PDF) 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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Improving in situ spinel refractory castables using a
Apr 01 2016 · Spinel compounds are used in the composition of refractory castables via two main methods in the first method the synthetic spinel particles are directly added to the castable and the resulting product is generally known as alumina-spinel castable in the second method the in situ reaction between alumina and magnesia at high temperatures creates spinel phase and the resulting product
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USASynthetic spinel refractory productsGoogle
USA US430746A USA USA US A US A US A US 430746 A US430746 A US 430746A US A US A US A US A US A US A Authority US United States Prior art keywords refractory spinel grain shapes percent Prior art date Legal status (The legal status is an assumption and is not a
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Alumina-coated spinel-silicon carbide refractory
What is claimed is 1. A method of manufacturing a spinel-SiC refractory composition comprising i) adding aqueous alumina sol to spinel aggregates to wet the spinel aggregates ii) adding fine alpha-alumina and boehmite to the wetted spinel aggregates and mix thoroughly to get a spinel aggregate slurry iii) drying and heating the spinel aggregate slurry to produce alumina-coated spinel
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SPINEL ISOPIPE FOR FUSION FORMING ALKALI Justia
Feb 23 2009 · A glass manufacturing system and method are described herein that use a forming apparatus (isopipe) made from or at least coated with a magnesium aluminate spinel material which is a chemically stable and compatible refractory material when used for forming
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Spinel In situ versus PreformedClearing the Myth
The spinel forming spinel containing castable (SP-SF) reaches its d max at 1250 °C whereas the spinel forming castable (SP) shows the lowest d max at 1150 °C. This is in line with the theory. The CaO-MgO-Al 2O 3-SiO 2 phase diagram shows that the tempera-2 2 SP-SF-NC 2
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Corundum-Spinel CastableRS Refractory Castable for Sale
The powder is composed of pure synthetic spinel powder α-alumina micro powder reactive alumina powder pure calcium aluminate cement and dispersant. It belongs to low cement combined castable. The corundum-spinel refractory material combines the
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Improvement in Slag Resistance of No-Cement Refractory
Due to the excellent corrosion resistance to basic slags and good thermo-mechanical properties either in situ forming or pre-formed spinel (MgAl 2 O 4) containing cement bonded refractory castables (low cement castables (LCCs)) have been widely used for steel ladles .Many publications have also highlighted that the in-situ spinel forming LCCs exhibit better slag resistance compared to the
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Castable refractory composition and methods of making
The present invention is a castable refractory composition characterized in that it comprises the following stages (1) filling a mold with dry coarse particulates which can have a size between about 1 and 60 mm to form a formed dry body (2) infiltrating the formed dry body with a slurry consisting of (i) a binder (ii) water and (iii) fine
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Corundum-Spinel CastableRS Refractory Castable for Sale
The powder is composed of pure synthetic spinel powder α-alumina micro powder reactive alumina powder pure calcium aluminate cement and dispersant. It belongs to low cement combined castable. The corundum-spinel refractory material combines the
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(PDF) Ultra-refractory mantle within oceanic plateau
Spinel harzburgites from group 1 have homogenous composition characterized on average by Mg# WR 0 .92 Mg# Ol 0 91 FeO t 7 .3 wt. Al 2 O 3 0 .9 wt. modal orthopyroxene b 25 and LOI ≤ 2 group 2 is made of peridotite xenoliths whose major element and modal compositions are affected by serpentinization processes and have more scatter
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RefractoryWikipedia
A refractory material or refractory is a material that is resistant to decomposition by heat pressure or chemical attack and retains strength and form at high temperatures. Refractories are polycrystalline polyphase inorganic nonmetallic porous and heterogeneous. They are typically composed of oxides or non oxides like carbides nitrides etc. of the following materials silicon
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Spinel-Coated Graphite for Carbon Containing Refractory
The spinel hydrosol has been synthesized by were determined by standard methods (i.e. ASTM C 20-00 and the sol–gel route from cost-effective precursors e.g. hydrated C 133-94) and a comparative study of the two varieties was Al-nitrate and Mg-chloride.24 The (1 1) stoichiometry of performed taking the average of four specimens at each tem
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USASynthetic spinel refractory productsGoogle
USA US430746A USA USA US A US A US A US 430746 A US430746 A US 430746A US A US A US A US A US A US A Authority US United States Prior art keywords refractory spinel grain shapes percent Prior art date Legal status (The legal status is an assumption and is not a
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(PDF) Corrosion of High Alumina Spinel Castables by Steel
Industrial spinel substrates with 35 apparent porosity such as MgO-rich spinel stoichiometric spinel and Al2O3-rich spinel were used to study the influence of chemical composition and porosity
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Composition. MgO x Al 2 O 3 integration of further oxides of metals with a valence of 2 and 3 like FeO MnO ZnO Fe 2 O 3 Cr 2 O 3.. Raw materials. Chromite deposits in ultrabasic magmatic rocks. Production of spinel from alumina and magnesia through melting in an electric arc furnace = fused spinel or in a rotary kiln and shaft furnace = burned spinel.
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Spinel-Coated Graphite for Carbon Containing Refractory
The spinel hydrosol has been synthesized by were determined by standard methods (i.e. ASTM C 20-00 and the sol–gel route from cost-effective precursors e.g. hydrated C 133-94) and a comparative study of the two varieties was Al-nitrate and Mg-chloride.24 The (1 1) stoichiometry of performed taking the average of four specimens at each tem
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Refractory Castable EngineeringSBPMat
3.3. Binder additives and their setting mechanisms 11 3.4. Installation techniques highlighting the shotcrete method 12 3.5. Curing and drying behavior and their optimization 13 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
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A STUDY ON SPINEL FORMATION AND SINTERING
properties of the refractory body 8 . The in situ spinel formed in the alumina ramming mix at service temperature has a defective structure with a tendency of tional solid solutions while in contact with molten steelmaking slag 9 . When Fe2 and Mn2 cations migrate into A-site of spinel they form (Mg Mn Fe)O(Al Fe) 2 O 3
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Charge for manufacture of aluminium-ferrous spinel and
This entails the formation of spinel is less refractory composition and ultimately will adversely affect the high temperature performance of refractories such as the onset temperature softening tensile strength in bending. Pricesonline refractory articles and method for their manufacture // . Composition and method for forming
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Sintering behaviour of spinel–alumina composites
wet chemical method (table 1) and particle size distribu-tion by particle size analyser (table 2). Different batch compositions containing spinel and calcined alumina were prepared by mixing in an agate mortar. In each case the batch size was 60 g and the mixing time was 30 min. The details of batch compositions are given in table 3.
Get PriceSPINEL FORMING REFRACTORY COMPOSITIONS THEIR METHOD
1. 1-16. (canceled) 17. A particulate composition for use in an alumina-magnesia spinel forming dry vibratable mix the composition comprising based on the total weight of the particulate composition from 95 to 99.9 wt of a mixture of particulate Al 2 O 3 and particulate MgO and from 0.1 to 5 wt binding agent wherein at least a portion of the particles of said mixture of particulate Al
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(PDF) Ultra-refractory mantle within oceanic plateau
Spinel harzburgites from group 1 have homogenous composition characterized on average by Mg# WR 0 .92 Mg# Ol 0 91 FeO t 7 .3 wt. Al 2 O 3 0 .9 wt. modal orthopyroxene b 25 and LOI ≤ 2 group 2 is made of peridotite xenoliths whose major element and modal compositions are affected by serpentinization processes and have more scatter
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Spinel-Containing Refractories Request PDF
IN SITU spinel (MgAl 2 O 4 )-forming refractory castables are commonly used in steel ladles mainly due to their high chemical resistance. stoichiometric composition whereas the spinel forming
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Printed refractory weight of the basic composition
Information about ramming refractory masses containing composition of fused magnesia aluminasilica spinel FR. 3-0 5 mm of magnesium sulphate and iron powder FR. 0.5 to 0 mm in the claimed value is not found. Based on this we believe that the proposed solution is new and involves an inventive step. Example. For the manufacture of the samples used
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Spinel refractory material
The mass for production a spinel refractory material consists of (in mass ) an under-earth3-5 a sintering additive in the form of a mix of boric acid and sodium tripolyphosphate taken in the ratio from 1 9 up to 9 14.5-6.5 a temporary binder2-3 and a melted aluminum-magnesia spinelthe rest.
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Spinel-Containing Refractories Request PDF
IN SITU spinel (MgAl 2 O 4 )-forming refractory castables are commonly used in steel ladles mainly due to their high chemical resistance. stoichiometric composition whereas the spinel forming
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Corundum-Spinel CastableRS Refractory Castable for Sale
The powder is composed of pure synthetic spinel powder α-alumina micro powder reactive alumina powder pure calcium aluminate cement and dispersant. It belongs to low cement combined castable. The corundum-spinel refractory material combines the
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