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  • THE EFFECT OF NANO-TITANIA ADDITION ON THE

    The effect of nano-titania addition on the properties of high-alumina low-cement self-flowing refractory castables CeramicsSilikáty 55 (4) (2011) 321 Castable preparation In order to make the nano powder distribute evenly throughout the mixture nano-titania powder was mixed with the reactive alumina inside the mini type ball crusher in a definite proportion for two hours.

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  • Proceeding 232 THE VALUE OF ADDITIVES IN REFRACTORY

    The matrix of low cement castables contains fine and ultra-fine particles such as calcium aluminate cement reactive alumi-nas and other fines of synthetic or natural origin. It is essential that all the matrix components are distributed homogeneously during mixing

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  • Effect of Alumina Sol in No-Cement Refractory Castables

    (2001). Effect of Alumina Sol in No-Cement Refractory Castables. Transactions of the Indian Ceramic Society Vol. 60 No. 2 pp. 63-67.

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  • Effect of Micro-Sized Alumina Powder on the Hydration

    Micro-sized alumina powder is widely used in low cement high-alumina refractory castables. The hydration of calcium aluminate cement can be affected by adding micro-sized alumina powder. This work addresses the hydration of a commercial cement at 25°C with 50 wt micro-sized alumina powder added. The hydration heat was measured by isothermal micro-calorimetry.

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  • Cement Free Alumina Refectory CastablesRongsheng Refractory

    Cement Free Alumina Refectory Castables Feature 1. Cement free castables has the characteristics of high density high strength low porosity low wear thermal shock and corrosion. Refectory castables cement free alumina have good use effect and significant social and economic benefits.

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  • Effect of Alumina Sol in No-Cement Refractory Castables

    (2001). Effect of Alumina Sol in No-Cement Refractory Castables. Transactions of the Indian Ceramic Society Vol. 60 No. 2 pp. 63-67.

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  • INFLUENCE OF NANO SILICA ON PROPERTIES AND

    Ultra Low and No Cement Castables (ULCC NCC) have been used increasingly in high temperature industries due to low content of CaO and consequently high temperature properties 1 . Low melting-point eutectic phases are often formed in alumina refractory castables by reaction of CaO SiO2 and Al2O3. Since these phases demolish refractoriness and

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  • Cement Free Alumina Refectory CastablesRongsheng Refractory

    Cement Free Alumina Refectory Castables Feature 1. Cement free castables has the characteristics of high density high strength low porosity low wear thermal shock and corrosion. Refectory castables cement free alumina have good use effect and significant social and economic benefits.

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  • 1 STUDIES ON FLOW BEHAVIOUR OF LOW CEMENT

    temperature is high and the castable is under thermo-mechanical stress it is suggested to select reactive alumina having negligible amount of alkalies while designing silica-free low cement casta-ble for some special applications. To get dense matrix either in low cement or ultra-low cement castables addition of casting water is very important.

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  • Effects on Cold Modulus of Rupture and Cold Crushing

    Cement addition water addition and wet curing period are selected as the effects on cold modulus of rupture and cold crushing strength of one LCRC. According to the molding morphologies of the castables when the water addition is 8 wt. the castable is suitable to be cast by vibration fashion and the high strength of the castable can be kept because the hardening time is not very long.

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  • Zero-cement high-alumina castables Semantic Scholar

    Self-flow zero-cement high-alumina castables with low water content were obtained using either alumina or alumina/microsilica mixtures as fine powders. The effect of deflocculants on the self-flow characteristics of ultra low-cement castables in Al2O3–SiC–C system. S. Otroj

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  • Low Cement High Alumina CastableRS High Alumina

    From the name the Low Cement High Alumina Castable has some remarkable characteristics such as high aluminum content and low refractory cement content. Therefore this refractory castable has high strength resistance to erosion wear resistance and excellent performance. Low Cement High Alumina Castable Get a Free Quote

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  • Drying Stages during the Heating of High‐Alumina Ultra

    Dec 20 2004 · The purpose of this work was to investigate the drying kinetics of high‐alumina ultra‐low‐cement refractory castables under continuous heating conditions. Three main drying stages were identified during the castable heat‐up and were related to the phase change of free water and to the decomposition of hydrated products present in the body.

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  • Effect of different additives on the properties of alumina

    1 . Castables should be used in the electronic arc furnace roof which cover various requirements such as cyclic thermal treatment high temperature and corrosion by slag and smoke respectively. The alumina-spinel castables show good properties such as high modulus of rupture low porosity high density good resistance to thermal sock high

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  • Relationship Between the Ratio of High Alumina Castables

    Nov 12 2020 · High-alumina castable is a kind of low-cement castable with a cement content of less than 8 . It is a refractory castable made by mixing high alumina bauxite clinker as aggregate refractory clay as powder adding aluminate cement and sodium tripolyphosphate according to the formula ratio.

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  • Low Cement High Alumina Castables Effect of Distribution

    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)

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  • Zero-cement high-alumina castables Semantic Scholar

    Self-flow zero-cement high-alumina castables with low water content were obtained using either alumina or alumina/microsilica mixtures as fine powders. The effect of deflocculants on the self-flow characteristics of ultra low-cement castables in Al2O3–SiC–C system. S. Otroj

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  • The Effect of Nano-Alumina Particles Generated in Situ in

    Based on this premise this work shows the positive effects on the mechani-cal and thermomechanical properties promoted by the development in situ of alumina nanoparticles in the matrices of high alumina (≥85 wt Al 2 O 3) refrac-tory castables of the Ultra Low (3.0 wt CAC) and No Cement

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  • Rheology of High Performance Alumina and Spinel Castables

    The matrix of modern low cement (LC) and ul-tra-low cement (ULC) castables can be con-sidered as a suspension with relatively high solids content. For high alumina and spinel castables the ma-trix is composed of 4 Silica fume or reactive alumina The question is not whether to use either silica fume or reactive alumina The final

    Get Price
  • Effect of different additives on the properties of alumina

    1 . Castables should be used in the electronic arc furnace roof which cover various requirements such as cyclic thermal treatment high temperature and corrosion by slag and smoke respectively. The alumina-spinel castables show good properties such as high modulus of rupture low porosity high density good resistance to thermal sock high

    Get Price
  • APPLICATION OF CALCIUM LUMINATE CEMENT (CAC TO

    changing fume silica type in a typical high purity Alumina low cement castable which has a 5 addition of a 70 Alumina cement together with 10 of a fine reactive Alumina and 5 fume silica. Table 1 The effect of fume silica type upon castable lacing properties. LCC 1 LCC 2 LCC 3 Fume silica type SiO2 97.5 85.5 91.2 Carbon <0.5 4.1 2.0

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  • Effect of alumina fines on vibratable high alumina low

    High-alumina low-cement castables with Dinger and Funk particle size distribution coefficients of 0.27 and 0.29 were studied using two different alumina fines namely WTA fine and reactive alumina.

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  • Effect of zircon additions on low and ultra-low cement

    Effect of zircon additions on low and ultra-low cement alumina and bauxite castables M.F. Zawrah National Research Center Ceramics Department 12622 Dokki Cairo Egypt Received 6 June 2005 received in revised form 12 October 2005 accepted 4 December 2005 Available online 11

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  • Densification characteristics of chromia/alumina castables

    Jan 05 2012 · The chromia/alumina castable has an excellent resistance to slag corrosion. To provide the optimum particle packing the grain composition of fine alumina powders and alumina cement in matrix parts in the castable would be an essential requirement to obtain a castable associating high flow ability with low water content.

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  • Comparison of Silica-sol and Low Cement Bonded Tabular

    reactive aluminas when compared to calcined alumina. The opposite applies for cement bonded castables. 1 Introduction With the development of matrix aluminas the water demand for low cement castables (LCC) could be considerably decreased. Due to the low water content the castables decreased in porosity and gained in strength.

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  • 1 STUDIES ON FLOW BEHAVIOUR OF LOW CEMENT

    temperature is high and the castable is under thermo-mechanical stress it is suggested to select reactive alumina having negligible amount of alkalies while designing silica-free low cement casta-ble for some special applications. To get dense matrix either in low cement or ultra-low cement castables addition of casting water is very important.

    Get Price
  • Rheology of High Performance Alumina and Spinel Castables

    The matrix of modern low cement (LC) and ul-tra-low cement (ULC) castables can be con-sidered as a suspension with relatively high solids content. For high alumina and spinel castables the ma-trix is composed of 4 Silica fume or reactive alumina The question is not whether to use either silica fume or reactive alumina The final

    Get Price
  • Ultra Low Cement and No Cement Castable Refractories

    Aug 14 2002 · These dense strong refractory castables based on the use of low calcium aluminate cement content have replaced many conventional castables plastics ramming and gunning mixes and are used in many applications that require high refractoriness

    Get Price
  • Ultra Low Cement and No Cement Castable Refractories

    Aug 14 2002 · These dense strong refractory castables based on the use of low calcium aluminate cement content have replaced many conventional castables plastics ramming and gunning mixes and are used in many applications that require high refractoriness

    Get Price
  • THE EFFECT OF NANO-TITANIA ADDITION ON THE

    The effect of nano-titania addition on the properties of high-alumina low-cement self-flowing refractory castables CeramicsSilikáty 55 (4) (2011) 321 Castable preparation In order to make the nano powder distribute evenly throughout the mixture nano-titania powder was mixed with the reactive alumina inside the mini type ball crusher in a definite proportion for two hours.

    Get Price

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