drying behavior of hydratable alumina bonded refractoryevaluation of alternative refractory materials for the
Title and Author Table Presentation List (Tentative) Title
Refractory Management Program for Smelting Furnaces Mitchell Henstock Afshin Sadri Winnie Ying Design of Hydratable Alumina-bonded Castables with Optimized Drying Behavior A. P. Luz B. P. Bezerra M. H. Moreira V. C. Pandolfelli The Application of Ti-Max Phase in Low Carbon Refractories and Elucidating Its Related Role Aug 16 2018 · A novel magnesia–alumina-based binder for in situ spinel-bonded refractory castables was prepared by mixing MgO and Al 2 O 3 reactive micro-powders with MgO/Al 2 O 3 molar ratios of 1 0 2 1 and 1 2. Dry raw materials were weighted and pre-homogenized together.
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An experimental investigation of hydration mechanism of
Aug 16 2018 · A novel magnesia–alumina-based binder for in situ spinel-bonded refractory castables was prepared by mixing MgO and Al 2 O 3 reactive micro-powders with MgO/Al 2 O 3 molar ratios of 1 0 2 1 and 1 2. Dry raw materials were weighted and pre-homogenized together. Refractory Management Program for Smelting Furnaces Mitchell Henstock Afshin Sadri Winnie Ying Design of Hydratable Alumina-bonded Castables with Optimized Drying Behavior A. P. Luz B. P. Bezerra M. H. Moreira V. C. Pandolfelli The Application of Ti-Max Phase in Low Carbon Refractories and Elucidating Its Related Role
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Full article Reasons for crack propagation and strength
Apr 25 2019 · Cardoso FA Innocentini MDM Miranda MFS et al. Drying behavior of hydratable alumina-bonded refractory castables. J Eur Ceram Soc. 200424 797802. Web of Science ® Google Scholar Ye G Troczynski T. Hydration of hydratable alumina Installation
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Abstract One of the most important elements of furnaces boilers and other heating units is the structure (lining) usually made of silica–alumina basic or special refractories. The basic refractories are materials that are increasingly in demand and whose manufacturing involves necessarily the use of MgO and CaO. In this article the description and characterization of magnesite (MgCO3 Rheological behaviors of calcium aluminate cement-hydratable alumina bonded corundum-spinel castable suspensions with different dispersants Effect of particle size of calcium aluminate cements on strength of castables at 110℃ and 800℃ Tailoring the expansion of alumina-magnesia cement-bonded castables by batio3 addition
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Full article Reasons for crack propagation and strength
Apr 25 2019 · Cardoso FA Innocentini MDM Miranda MFS et al. Drying behavior of hydratable alumina-bonded refractory castables. J Eur Ceram Soc. 200424 797802. Web of Science ® Google Scholar Ye G Troczynski T. Hydration of hydratable alumina About. â Solid State Phenomenaâ (formerly Part B of â Diffusion and Defect Dataâ ) is a peer-reviewed journal which covers a set of research fundamentals of the structures and their influence on the properties of solids of experimental techniques and practical applications of materials solid-state devices and structures in the context of the latest achievements in the area of
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Overview of Refractory Materials Refractory Aluminium
High Alumina Refractories Alumina refractory which consists of aluminum oxide and traces of other materials is the most mature of the engineering ceramics. Alumina is one of the most chemically stable oxides known which offers excellent hardness strength and spalling resistance. Aqueous suspensions of calcined alumina or silica (dense matrixes) several inorganic porogenic agents (hydrotalcite Al(OH) 3 9 10 Mg(OH) 2 and CaCO 3 ) and hydratable alumina were produced and directly cast using hydraulic binders (hydratable alumina mainly). In these systems the total porosity levels attained after curing and drying
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Dispersants and their Effects on Hydratable Alumina
Alternative hydraulic binders such as hydratable alumina (HA) have been used in refractory castables. However the drying step of these materials is usually slower when compared to the calcium aluminate cement containing compositions. The drying step of dense refractory castables containing hydraulic binders is a critical process which usually requires using slow heating rates due to the high explosion trend of such materials during their first thermal treatment. Thus this work investigated the performance of alternative additives to induce faster and safer drying of self-flowing high-alumina refractory castables bonded
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Solid State Phenomena Journal Impact IF
About. â Solid State Phenomenaâ (formerly Part B of â Diffusion and Defect Dataâ ) is a peer-reviewed journal which covers a set of research fundamentals of the structures and their influence on the properties of solids of experimental techniques and practical applications of materials solid-state devices and structures in the context of the latest achievements in the area of able alumina-bonded refractory casta-bles (HAB) is the result of the gel-like phases present in Ca-free bonded spec-imens. The consequence on the drying behavior is the shift of the free water re-lease to higher temperatures (compared to CAC bodies) and consequently the increase of the steam pressure and the likelihood of explosive spalling under
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Colloidal silica as a nanostructured binder for refractory
In the preparation of a CS-bonded alumina structure for instance alumina particles are directly mixed with an anionic colloidal silica suspension and proper dispersing agent (further addition of able alumina-bonded refractory casta-bles (HAB) is the result of the gel-like phases present in Ca-free bonded spec-imens. The consequence on the drying behavior is the shift of the free water re-lease to higher temperatures (compared to CAC bodies) and consequently the increase of the steam pressure and the likelihood of explosive spalling under
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CONGRESS UNITECR 2017
Rheological behaviors of calcium aluminate cement-hydratable alumina bonded corundum-spinel castable suspensions with different dispersants Effect of particle size of calcium aluminate cements on strength of castables at 110℃ and 800℃ Tailoring the expansion of alumina-magnesia cement-bonded castables by batio3 addition The invention relates to free-flowing refractory castable material and castings produced therefrom. Refractory nonbasic and basic refractory castable materials have been known for a long time. The traditional refractory castable materials have thixotropic properties and must be lined sing vibration technology. In the past free-flowing refractory castable materials were solely based on alumina
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An epeimenal ineigaion of hdaion mechanim of he bina
A novel magnesia–alumina-based binder for in situ spinel-bonded refractory castables was prepared by mixing MgO and Al 2O 3 reactive micro-powders with MgO/Al 2O 3 molar ratios of 1 0 2 1 and 1 2. Dry raw materials were weighted and pre-homogenized together. The water–solid material ratio (abbreviated w/s) was used as a basis for sample Suspensions exhibiting a viscosity routes currently available for the preparation of macroporous decrease from 10–30 Pa u0001 s at a shear rate of 5 su00021 down to 1–6 ceramics (i.e. pore size 450 nm) with particular emphasis on Pa u0001 s at a shear rate of 100 su00021 have been shown to be suitable the processing–microstructure
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An epeimenal ineigaion of hdaion mechanim of he bina
A novel magnesia–alumina-based binder for in situ spinel-bonded refractory castables was prepared by mixing MgO and Al 2O 3 reactive micro-powders with MgO/Al 2O 3 molar ratios of 1 0 2 1 and 1 2. Dry raw materials were weighted and pre-homogenized together. The water–solid material ratio (abbreviated w/s) was used as a basis for sample The drying step of dense refractory castables containing hydraulic binders is a critical process which usually requires using slow heating rates due to the high explosion trend of such materials during their first thermal treatment. Thus this work investigated the performance of alternative additives to induce faster and safer drying of self-flowing high-alumina refractory castables bonded
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(PDF) Processing Routes to Macroporous Ceramics A Review
Suspensions exhibiting a viscosity routes currently available for the preparation of macroporous decrease from 10–30 Pa u0001 s at a shear rate of 5 su00021 down to 1–6 ceramics (i.e. pore size 450 nm) with particular emphasis on Pa u0001 s at a shear rate of 100 su00021 have been shown to be suitable the processing–microstructure Introduction Hydraulic binders Calcium aluminate cements (CACs) Hydratable alumina (HA) Experimental techniques used to assess the binder hydration behavior and setting Effect of castable s matrix and additives on binder hydration Evolution of CAC and HA-bonded castables properties during the curing stage Chemical binders (phosphates) Bonding
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Nanotechnology in Refractory Castables — An Overview
The use of colloidal silica as an alternative binder has improved this condition and is being practiced commercially but restrictions on high temperature applications have encouraged the use of other colloidal systems namely alumina mullite spinel sols etc. Nanoparticles are also present in the castable system from binders like hydratable Apr 25 2019 · Cardoso FA Innocentini MDM Miranda MFS et al. Drying behavior of hydratable alumina-bonded refractory castables. J Eur Ceram Soc. 200424 797802. Web of Science ® Google Scholar Ye G Troczynski T. Hydration of hydratable alumina
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Nanotechnology in Refractory Castables — An Overview
The use of colloidal silica as an alternative binder has improved this condition and is being practiced commercially but restrictions on high temperature applications have encouraged the use of other colloidal systems namely alumina mullite spinel sols etc. Nanoparticles are also present in the castable system from binders like hydratable The castables consisted of dead‐burned magnesia with additions of calcined and/or tabular aluminas or microsilica to the matrix. The addition of alumina in combination with magnesia increased the hydration rate during the drying of the castable due to a lower permeability of the casted piece.
Get PriceDrying behavior of hydratable alumina-bonded refractory
May 01 2004 · The drying behavior of a hydratable alumina-bonded (HAB) refractory castable was evaluated by thermogravimetric tests and compared with an ultra-low cement composition (CAC). The key properties of monolithic refractory dry-out performance such as fluid permeability and mechanical strength were also determined. Drying behavior of hydratable alumina-bonded refractory castables FA Cardoso MDM Innocentini MFS Miranda FAO Valenzuela Journal of the European Ceramic Society 24 (5) 2004
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Title and Author Table Presentation List (Tentative) Title
Refractory Management Program for Smelting Furnaces Mitchell Henstock Afshin Sadri Winnie Ying Design of Hydratable Alumina-bonded Castables with Optimized Drying Behavior A. P. Luz B. P. Bezerra M. H. Moreira V. C. Pandolfelli The Application of Ti-Max Phase in Low Carbon Refractories and Elucidating Its Related Role Iron melting KELLUNDITE 700 refractories are an alumina based mullite forming dry-lining alternative to quartzbased silica linings for grey and ductile iron. With the health and safety issues associated with the installation and removal of silica-based refractories KELLUNDITE 700 materials provide a cost-effective alternative lining solution.
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Al O -CaO macroporous ceramics containing hydrocalumite
the second is related to pseudoboehmite decomposition an usual phase for hydratable alumina-based refractories 30 . Figure 4 All compositions in Figure 4 present similar initial E values. Nevertheless after thermal treatment it can be seen that the REF one showed the highest one at the end of Moreover the combination of CAC and hydratable alumina gave rise to an improved refractory (M–2CAC–2HA–S) showing a transient liquid formation at an increased temperature high thermal shock resistance (no E decay after 8 thermal cycles ΔT=800°C) and high mechanical strength at
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