high‐alumina boron‐containing refractory castables
Sintering Effect of Al and a Boron Source in High-Alumina
· Petrochemical refractory end-users face difficulties in finding commercial products with optimized thermo-mechanical properties for the low operational temperatures (<900°C) in fluid catalytic cracking units. Blending colloidal binders with sintering additives in castable compositions is an interesting alternative that may overcome the limited densification of conventional cement-bonded
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
High alumina castables a comparison among various sol-gel
· A comparison among various sol-gel bonding systems has been done for high alumina castable refractory. Four different sol systems namely alumina boehmite mullite and spinel have been synthesized and used individually as sole binder in high alumina castable system with particle size distribution coefficient of 0.23 as per Dinger and Funk model.
THE EFFECT OF ADDITIVES ON THE PROPERTIES OF HIGH
· The effect of additives on the properties of high alumina low-cement self-flowing castables CeramicsSilikáty 53 (1) 42-47 (2009) 45 The refractory castable with optimized amount of PA (0.06 wt. ) acquires self-flowing properties by addition of 5 weight percent of
Steelplant Refractories Containing Alphabond Hydratable
· good flow for silica-free high alumina matrix materials especially those containing reactive aluminas such as A1000SGD and A3000FL. Mixing Generally dense castables using Alphabond may require additional time to wet out after the water addition is made (1-2 minutes dry mixing followed by 4-5 minutes wet mixing).
Papersrefractories-worldforum
· New Additive Packages for Self-flowing High-alumina and MgO Based Refractory Castables. Hong Peng Bjørn Myhre. Volume 5 Issue 2 Pages 99104. Keywords self-flowing new dispersants high-alumina and basic refractory castables microsilica gel-bonding. Abstract References Full Article New Binder for Refractory Castables
(PDF) High-Alumina Multifunctional Refractory Castables
High-Alumina Multifunctional Refractory Castables. American Ceramic Society Bulletin. Jorge Gallo. Figure 6 456Torque applied to castables (q = 0.26) containing different water contents when subjected to a shearing cycle in the rheometer. The figure also indicates ( blue region) the level of torque normally obtained with commercial
Review of Matrix Aluminas for Refractory Formulations
· were the first high-alumina matrix products that were used in refractory formulations in both shaped and unshaped products. At that time the flow properties of castables were enhanced by the use of silica fume. This was followed later by the development of fully ground reactive aluminas
Advanced boron-containing refractory castables bonded with
· For instance the addition of a boron-based additive to CAC containing castables usually does not result in a transient liquid phase sintering process because although the precipitation of aluminum borates most likely can take place in the °C range a high amount of liquid is still available in the refractory microstructures above 1000 °C .
Cited by 2
Self-reinforced high-alumina refractory castables
· Taking this into account novel alumina sources (AloxX spheres and submicron alumina comprised by transition Al 2 O 3 particles with reactive surfaces and a spherical shape Fig. 1) have been recently developed for refractory compositions as they may be able to speed up the castables sintering and densification processes and allow the design of advanced products for various sorts of
STUDY AND PREPARATION OF HIGH ALUMINA
· 1. Conventional castables Castables containing Cao>2.5 on calcined basis Dense castables- These type of castables are produced by calcinated fireclay high-alumina refractory aggregates andalusite bauxite white-fused alumina and high-alumina cements. It is having higher density and is known for its strength and low maintenance.
Review of Matrix Aluminas for Refractory Formulations
· were the first high-alumina matrix products that were used in refractory formulations in both shaped and unshaped products. At that time the flow properties of castables were enhanced by the use of silica fume. This was followed later by the development of fully ground reactive aluminas
Dense CastablesAlumina Dense Castable Alumina Castable
We are involved in offering high quality Whytheat A 50 Alumina Dense Castable. It is a high purity high alumina castable of exceptional quality with an alumina content of over 90 and with very low silica and iron contents. It can resist attack from process gas atmospheres containing carbon monoxide and hydrogen. Product Type.
High-Alumina Chemically Bonded Refractory Castables
· High-Alumina Chemically Bonded Refractory Castables Containing Liquid or Powdered Binders. D. T. Gomes 1 A. P. Luz 2 S. J. S. Lopes 2 V. C. Pandolfelli 2. 1 Petrobras Research and Development Center Rio de Janeiro RJ /Brazil 2 Federal University of São Carlos Materials Engineering Department São Carlos SP /Brazil
High-alumina refractory castables bonded with novel
· Therefore this work addresses the investigation of high-alumina (with in situ mullite formation) refractory castables bonded with colloidal silica or SioxX®-Zero and containing 0 or 1 wt of boron carbide in order to induce transient liquid sintering.
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CASTABLES alkarawanRefractories
These refractory Castables are hydraulic setting and can be cast or moulded to any shape and can also be suitably modified for gunning of furnace linings. MAXHEAT Castables are a group of high purity dense Castables all of which contain high purity high alumina cement as the refractory binder. A series of MAXHEAT group of Castables are
Alumina Magnesia Refractory CastablesRS Kiln Refractory
The Bonding Method for Alumina Magnesia Refractory Castables. Binder is an important part of alumina magnesia castables. The bonding methods used for alumina-magnesia castables are generally calcium aluminate cement bonding silica micro powder bonding hydrated alumina bonding sol bonding magnesium silicon wafer bonding etc.
Alumina Bricks Refractory Alumina Bricks
Fireclay refractory primarily consists of hydrated aluminum silicates with minor proportions of other materials. Fireclay brick content ranges from 18 to 44 alumina and 50-80 silica. Super duty bricks alumina content of 40-44 provides good strength and stability of volume. Super duty fireclay brick can have several modifications including
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
Low Cement High Alumina Castables Effect of
· Low Cement High Alumina Castables Effect of Distribution Coefficients 13 P a g e The most significant advancement in monolithics technology was the development of castables based on Calcium Aluminate Cements. Refractory castables (which are used by casting method)
Sintering Effect of Al and a Boron Source in High-Alumina
· Petrochemical refractory end-users face difficulties in finding commercial products with optimized thermo-mechanical properties for the low operational temperatures (<900°C) in fluid catalytic cracking units. Blending colloidal binders with sintering additives in castable compositions is an interesting alternative that may overcome the limited densification of conventional cement-bonded
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.
Low Cement High Alumina Castables Effect of
· Low Cement High Alumina Castables Effect of Distribution Coefficients 13 P a g e The most significant advancement in monolithics technology was the development of castables based on Calcium Aluminate Cements. Refractory castables (which are used by casting method)
Non-slumping sprayable refractory castables containing
Ultrafine alumina when used to reduce the water required for casting refractory castables is a substantial commercial impediment because of its high cost. In addition ultrafine alumina can have a detrimental effect on the rheology of refractory castables in particular those that are bonded with calcium aluminate cement. Refractory castables
High-alumina refractory castables bonded with novel
· Therefore this work addresses the investigation of high-alumina (with in situ mullite formation) refractory castables bonded with colloidal silica or SioxX®-Zero and containing 0 or 1 wt of boron carbide in order to induce transient liquid sintering.
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.
Andalusite‐Based High‐Alumina CastablesRebouillat
· A better understanding of the mullitization mechanisms provides new information on use of this mineral in refractory castables. By using specific particle-size distributions for andalusite-based high-alumina castables the primary mullite formation can be effectively enhanced by a secondary mullite reaction within castables matrices.
STUDY AND PREPARATION OF HIGH ALUMINA
· 1. Conventional castables Castables containing Cao>2.5 on calcined basis Dense castables- These type of castables are produced by calcinated fireclay high-alumina refractory aggregates andalusite bauxite white-fused alumina and high-alumina cements. It is having higher density and is known for its strength and low maintenance.
High Alumina low Cement CastableRongsheng Refractory
· High alumina low cement refractory castables and ultra-low cement castables are used at a higher temperature than ordinary refractory castables of the same material. Clay and high-aluminum low-cement castables can be used in various heat treatment furnaces such as heating furnaces and soaking furnaces and linings of rotary kiln.
High-Alumina Chemically Bonded Refractory Castables
· High-Alumina Chemically Bonded Refractory Castables Containing Liquid or Powdered Binders. D. T. Gomes 1 A. P. Luz 2 S. J. S. Lopes 2 V. C. Pandolfelli 2. 1 Petrobras Research and Development Center Rio de Janeiro RJ /Brazil 2 Federal University of São Carlos Materials Engineering Department São Carlos SP /Brazil
Advanced Boron‐Containing Al2O3–MgO Refractory Castables
· Alumina-magnesia refractory castables present suitable performance during application in steel ladles due to the in situ spinel (MgAl2O4) formation. For
Advanced Boron‐Containing Al2O3–MgO Refractory Castables
· Alumina-magnesia refractory castables present suitable performance during application in steel ladles due to the in situ spinel (MgAl2O4) formation. For
Cited by 14High-alumina refractory castables bonded with novel
· Therefore this work addresses the investigation of high-alumina (with in situ mullite formation) refractory castables bonded with colloidal silica or SioxX®-Zero and containing 0 or 1 wt of boron carbide in order to induce transient liquid sintering.
High Alumina low Cement CastableRongsheng Refractory
· High alumina low cement refractory castables and ultra-low cement castables are used at a higher temperature than ordinary refractory castables of the same material. Clay and high-aluminum low-cement castables can be used in various heat treatment furnaces such as heating furnaces and soaking furnaces and linings of rotary kiln.
