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densification characteristics of chromia alumina castables

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  • All articlesJournal of Ceramic Science

    The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài Densification characteristics of chromia/alumina castables by particle size distribution

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  • Báo cáo hóa học " Densification characteristics of

    Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài Densification characteristics of chromia/alumina castables by particle size distribution The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials.

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  • Improvement of Durability of Purging Plugs Using MgO

    The slag resistance of the prepared alumina–magnesia castables was significantly better than that of the alumina–chrome castables. Microstructure and energy spectrum analysis showed that the formation of a solidified reaction layer mainly consisting of spinel and CaAl 12 O 19 was the major cause of the observed difference in slag resistance. Thermal Shock Resistance of 60 to 80 Alumina Brick 909 D.S. Whittemore and S.R. Pavlica Harbison-Walker Refractories Company USA Properties and Phase Relationships of Alumina-Chromia Refractory Systems 919 B.J. Hauer D.P. Heitzenrater and PL. Yoder BMIFrance USA Effect of Mullite in the Decomposition and Densification of Aluminum

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  • Alert Refractories (January 2017)metallon

    Densification of Al 2 O 3-Al 4 SiC 4 Material at High Temperature. -MgO castables the spinel formation reaction takes place in unfired Al 2 O 3 reason waste-melting furnaces are generally lined with alumina- chromia bricks with good corrosion resistance The general applied objective of this project is to develop hydratable alumina-bonded castables of properties comparable to the high-temperature fired basic bricks. This work is focused on improving the sintering of the ceramic binding systems at relatively low temperatures ( 1300°C) through incorporation of ultrafine powders. Ultrafine magnesium aluminate spinel powders were synthesized

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  • Effect of Binders on the Properties of Chromia/Alumina

    Refractory castable specimens were prepared using industrial white fused alumina as aggregates chromium oxide green and ultrafine alumina powder as matrix materials solid aluminum dihydrogen phosphate (Al(H2PO4)3) or liquid AlPO4 as binder materials. Effect of different binder additions on the propertiSubscript textes of high chromium oxide IGCC refractory castables such as bulk density Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài Densification characteristics of chromia/alumina castables by particle size distribution

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  • Effect of graphite on the sintering and densification of

    Densification behavior of such castables in the presence of ultrafine alumina was assessed through the measurement of parameters like flow value viscosity bulk density apparent porosity and microstructure evaluation by an SEM study. The quality of these refractories applied on IGCC should be a key factor that affects the entire cost of electric power production. In this study low cost chromia-alumina castables were chosen as candidate refractories for IGCC. To enhance the workability of chromia-alumina castables ultrafine alumina powder was added to improve the workability.

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  • Castable Scientific

    The quality of these refractories applied on IGCC should be a key factor that affects the entire cost of electric power production. In this study low cost chromia-alumina castables were chosen as candidate refractories for IGCC. To enhance the workability of chromia-alumina castables ultrafine alumina powder was added to improve the workability. Jan 01 2013 · Alumina–chrome refractories are used in various forms such as castables and shaped refractory in blast furnaces electric arc furnace fiber glass furnaces gasifiers carbon black reactors various corrosion resistance refractory incinerators and high level nuclear waste vitrification because of their superior mechanical properties low solubility chemical stability slag/corrosion resistance and

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  • Densification characteristics of chromia/alumina castables

    Densification behavior of such castables in the presence of ultrafine alumina was assessed through the measurement of parameters like flow value viscosity bulk density apparent porosity and microstructure evaluation by an SEM study. The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials.

    Get Price
  • Proceedings of Unified International Technical Conference

    Thermal Shock Resistance of 60 to 80 Alumina Brick 909 D.S. Whittemore and S.R. Pavlica Harbison-Walker Refractories Company USA Properties and Phase Relationships of Alumina-Chromia Refractory Systems 919 B.J. Hauer D.P. Heitzenrater and PL. Yoder BMIFrance USA Effect of Mullite in the Decomposition and Densification of Aluminum Densification characteristics of chromia/alumina castables by particle size distribution Jingming Zhao1 Taesuk Kim1 Gichul Kim1 Kyuhong Hwang1 and Dongsik Bae2 Abstract The quality of the refractories applied on integrated gasification combined cycle should be a key factor that affects both the reliability and the economics of gasifier

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  • The role of TiO 2 in the densification of low cement Al 2O

    Fused alumina (70 ) and dead burnt magnesia (30 ) of different grain sizes were used to synthesize Al2O3–MgO spinel castable. Calcium aluminate (75 Al2O3) cement was used as binder of the castable. Jun 18 2020 · Chrome bricks for sale in the first non-ferrous metallurgy furnace gas slag furnace with excellent resistance to steel slag outside the furnace non-ferrous smelting slag coal gasification slag and all kinds of glass liquid erosion ability. In recent 10 years this kind of refractory began to get application in glass furnace the place such as feeding mouth because it can significantly

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  • (PDF) High-Alumina Multifunctional Refractory Castables

    High-Alumina Multifunctional Refractory Castables. between particles leading to the mixing stage known as the castable turning point (5 6) .Castables displaying superior SSA are expected to require higher water contents to reach the turning point which explains the tendency observed in this study for compositions with varying q values.The Alumina-magnesia refractory castables have been widely used in the wall and bottom impact pad of steel ladles. The properties of alumina-magnesia refractory castables with SnO 2 additive in 05 wt range were investigated. The phase composition microstructure physical and mechanical properties of these refractories were studied.

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  • Sintering and Performance of High Alumina Refractory with

    Abstract. Sintering behavior and performance of high alumina refractory based on the ternary subsystem MgAl 2 O 4-CaAl 4 O 7-CaAl 12 O 19 were investigated using ZrO 2 as an additive up to 8 wt. by solid state reaction sintering. It was found that the added ZrO 2 could dissolve in the CA 6 grains in the form of a solid solution which enhanced the isotropic growth of CA 6 grains and then Chromite refractories are composed of sintered magnesia and chromia. They have constant volume at high temperatures high refractoriness and high resistance to slags. Alumina refractories are composed of ≥ 50 alumina (Al 2 O 3). Based on method of manufacture

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  • The role of TiO 2 in the densification of low cement Al 2O

    Fused alumina (70 ) and dead burnt magnesia (30 ) of different grain sizes were used to synthesize Al2O3–MgO spinel castable. Calcium aluminate (75 Al2O3) cement was used as binder of the castable. Alumina is one of the important materials in structural ceramic application because of its excellent mechanical properties good chemical stability and high temperature characteristics (Ghate et al. 1975 Wang Hsu 1996). Its intrinsic brittleness and relatively poor reliability however made the toughening of alumina ceramics an important

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  • for Slagging Gasifier Applications

    • 60-80 chromia were little affected at 1500°C but more distinction observed at 1600°C. • Fusion-cast 80 chromia-MgO showed best corrosion resistance. Sintered 80 chromia-MgO and 75 chromia-alumina had low corrosion and less costly. Alumina is one of the important materials in structural ceramic application because of its excellent mechanical properties good chemical stability and high temperature characteristics (Ghate et al. 1975 Wang Hsu 1996). Its intrinsic brittleness and relatively poor reliability however made the toughening of alumina ceramics an important and

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  • Alert Refractories (January 2017)metallon

    Densification of Al 2 O 3-Al 4 SiC 4 Material at High Temperature. -MgO castables the spinel formation reaction takes place in unfired Al 2 O 3 reason waste-melting furnaces are generally lined with alumina- chromia bricks with good corrosion resistance The densification behaviour of graphite-free and graphite-containing castable matrices has been characterized too by their thermal and thermomechanical characteristics up to 1500 °C. The role of coated graphite on improved performance of the refractory ceramics was explored by thermogravimetry X-ray diffraction microstructure and thermal

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  • Effect of graphite on the sintering and densification of

    Densification behavior of such castables in the presence of ultrafine alumina was assessed through the measurement of parameters like flow value viscosity bulk density apparent porosity and microstructure evaluation by an SEM study. Chromite refractories are composed of sintered magnesia and chromia. They have constant volume at high temperatures high refractoriness and high resistance to slags. Alumina refractories are composed of ≥ 50 alumina (Al 2 O 3). Based on method of manufacture

    Get Price
  • Latest Development in Refractory Monolithics

    In cement bonded spinel forming castables (alumina-magnesia) the fume additions lower the temperature to onset of melting from around 1800°C to below 1400°C. Therefore cement free castables are an interesting alternative. When calcium aluminate cement is replaced by the calcia free Alphabond binder the temperature of onset of melting is Table 1 provides the characteristics of the materials. Three alumina-magnesia castables containing different amounts of MgO were used as test materials. The outer castable is alumina-silica material which shows good spalling resistance and small PLC. Table 1. Characteristics of specimens and outer castable Test materials Outer

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  • Chromia Scientific

    The quality of these refractories applied on IGCC should be a key factor that affects the entire cost of electric power production. In this study low cost chromia-alumina castables were chosen as candidate refractories for IGCC. To enhance the workability of chromia-alumina castables ultrafine alumina powder was added to improve the workability. Otroj S Marzban R Nemati ZA Sajadi N Nilforoushan MR. BEHAVIOUR OF ALUMINA-SPINEL SELF-FLOWING CASTABLES WITH NANO-ALUMINA PARTICLES ADDITION. Ceramics–Silikáty. 200953(2) 98-101. 68. Badiee SH Otroj S. EFFECT OF NANO-TITANIA ADDITION ON THE PROPERTIES OF HIGH-ALUMINA LOW-CEMENT SELF-FLOWING REFRACTORY CASTABLES.

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