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corrosion of high alumina castables by cao al2o3 sio2 mgo

Current Location : Home > corrosion of high alumina castables by cao al2o3 sio2 mgo

  • Dissolution behavior of a novel Al2O3-SiC-SiO2-C composite

    Jun 15 2017 · The decomposition product SiO 2 and Al 2 O 3 reacted with CaO and MgO then generated new phases such as Ca 2 Al 2 SiO 7 Ca 2 MgSi 2 O 7 and MgAl 2 O 4. These new phases broke away from the refractories as the slag was constantly flushed leading to the destruction and corrosion of the refractories.

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  • Corrosion resistance of corundum spinel castable to

    Show full abstract at 1500˚C the viscosity of CaO (55.8 )-Al2O3 (20 )-SiO2 (11.2 )-MgO (10 )-Li2O (3 ) slag is lower than 0.3 Pa∙s having good flow properties at 1600˚C under the

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  • Corrosion in high alumina refractory serviced in a bench

    Jan 15 2021 · Corrosion in high alumina refractory serviced in a bench-scale entrained flow gasifier. in the case of the microporous alumina reacting with various CaO–Al2O3–SiO2 slags Effect of Cr 2 O 3 addition on corrosion mechanism of refractory castables for waste melting furnaces and concurrent formation of hexavalent chromium.

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  • A Review on Recent Advances on Magnesia-Doloma

    The MgO-CaO system is remarkable for the high liquidus and solidus temperatures over the complete range 100 MgO- 100 CaO as the eutectic for the CaO–MgO binary system occurs at 2370 ºC 3 21 . MgO–CaO bricks are high-value refractories composed of lime (CaO) and periclase (MgO). MgO –CaO refractories have some

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  • Discussion on the Problems of Aluminum Magnesium Castables

    Nov 28 2020 · Third the study on the corrosion mechanism of pure Aluminum Magnesium Castables for the ladle shows that the working lining of the cast body reacts with the slag to form a protective layer. Most of the iron oxide and manganese oxide in the slag are embedded in the lattice structure to form spinel. The expansion caused by the reaction of iron

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  • Corrosion mechanism and kinetic behaviour of refractory

    Corrosion mechanism and kinetic behaviour of refractory materials in contact with CaO-Al 2O 3-MgO-SiO 2 slags S. JANSSON V. BRABIE and L. BOHLIN The Swedish School of Mining and Metallurgy Filipstad Sweden The rate of dissolution of solid MgO-C and doloma into liquid in CaO-Al 2O 3-SiO 2-MgO slag at

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  • Corrosion Mechanisms in Refractory Castables by Liquid

    The chemical composition of the slag consists mainly of CaO SiO 2 alumina and Fe 2 O 3. Using a heating microscope it was determined that the slag starts to melt around 1350 ºC. The chemical composition of the castables consist mainly of alumina (86 90 and 92 respectively) with a variation in material A which contains 5.8 MgO.

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  • Degradation of MgO refractory in CaO-SiO2-MgO-FeOx and CaO

    The high temperature dip technique has been used to investigate the corrosion of MgO refractory in SiO2-CaO-FeOx-MgO slag and Al 2O3-SiO2-CaO-FeOx-MgO slag at 1530 °C.

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  • Corrosion mechanism and kinetic behaviour of refractory

    Corrosion mechanism and kinetic behaviour of refractory materials in contact with CaO-Al 2O 3-MgO-SiO 2 slags S. JANSSON V. BRABIE and L. BOHLIN The Swedish School of Mining and Metallurgy Filipstad Sweden The rate of dissolution of solid MgO-C and doloma into liquid in CaO-Al 2O 3-SiO 2-MgO slag at

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  • The corrosion of refractory castables Request PDF

    Experiments on the corrosion of alumina based refractory castables containing 1 2 5 and 10 mass- of cement and 10 mass- of spinel were conducted in an induction furnace at 1550 1650 and 1750

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  • CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and

    article osti_ title = CaO-MgO-Al2O3-SiO2 (CMAS) corrosion of Gd2Zr2O7 and Sm2Zr2O7 author = Wang Honglong and Bakal Ahmet and Zhang Xingxing and Tarwater Emily and Sheng Zhizhi and Fergus Jeffrey W. abstractNote = Ceramic thermal barrier coatings are applied to superalloys used in gas turbine engineering to increase the operating temperature and the energy

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  • Study of Reactive Impregnation and Phase Transformations

    Corrosion of refractories results from reactive transport namely transport of agents and chemical reactions of these agents with impregnated medium. On one hand the transport involves either diffusion or impregnation depending on the state of the corrosive agents and the microstructure of the host media. On the other hand chemical reactions may be very numerous and complex.

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  • Corrosion mechanism and kinetic behaviour of refractory

    Corrosion mechanism and kinetic behaviour of refractory materials in contact with CaO-Al 2O 3-MgO-SiO 2 slags S. JANSSON V. BRABIE and L. BOHLIN The Swedish School of Mining and Metallurgy Filipstad Sweden The rate of dissolution of solid MgO-C and doloma into liquid in CaO-Al 2O 3-SiO 2-MgO slag at

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  • Influence of Temperature on CaO-MgO-Al2O3-SiO2 (CMAS

    Higher operating temperature improves the energy efficiency in gas turbine engines and thermal barrier coatings are applied to protect the blades from high temperature and dust corrosion. Dust composed by CaO-MgO-Al2O3-SiO2 (CMAS) can melt and react with pyrochlore zirconates thermal barrier materials and degrade the performance or cause

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  • Alumina Magnesia Refractory CastablesRS Kiln Refractory

    At the same time due to the excessive content of CaO at high temperatures it will react with SiO2 Al2O3 and MgO in the matrix to form a low melting phase which will reduce the high-temperature performance of the castable.

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  • JPAAlumina cement alumina cement

    Furthermore it is an alumina cement characterized by containing CaO · 2Al2O3 and / or 12CaO · 7Al2O3 CaO · Al2O3 and amorphous and the CaO / Al2O3 molar ratio is 0.8 to 1.4 The content of one or more selected from the group of SiO2 Fe2O3 TiO2 and MgO is 15 by mass or less and the alumina cement contains the alumina cement and alumina.

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  • Corrosion Mechanism Analysis of Al2O3-SiC-C Castable

    The present study aims to analyze the corrosion mechanism of Al2O3-SiC-C castables for blast furnace main trough. The anti-oxidation and corrosion properties of the castable caused by slag were studied with residual lining investigation and microstructure analysis. A rapid recognition of grain distribution ingredients and mineral phases was achieved by using cathodoluminescence (CL) in

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  • Investigations on the properties of Al2O3–MgO refractory

    Aug 15 2018 · In this paper the properties including strengths oxidation resistance as well as corrosion resistance of Al 2 O 3 –MgO refractory castables bonded with Secar71 carbon back/S

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  • Study of Al2O3 MgO Refractory Castables Corrosion by

    Study of Al2O3-MgO Refractory Castables Corrosion by Secondary Metallurgy Steel Ladle Slags Slag and Molten Steel Attack Resistance of High Alumina Refractory Castables with Spinel Periclase and Dolomite Additions. Rodriguez Recrystallization behaviour of CaO-MgO-SiO2 system ceramic fibers. Wang Xitang / Zhang Baoguo 2007.

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  • Types Of RefractoriesDifferent 10 Types of Refractories

    Price of high alumina refractory brick is per ton. Magnesite Refractory Magnesite is a group of carbonate mineral. Its formula is MgCO 3 with MgO 45-50 and CO 2 50-55 . They are unreactive to carbon dioxide. They have a high melting temperature and they are on-toxic in nature. They resist alkali slag attacks. Raw Materials

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  • Alumina Magnesia Refractory CastablesRS Kiln Refractory

    At the same time due to the excessive content of CaO at high temperatures it will react with SiO2 Al2O3 and MgO in the matrix to form a low melting phase which will reduce the high-temperature performance of the castable.

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  • Investigations on the properties of Al2O3–MgO refractory

    MgO refractory castables bonded by in situ carbon containing calcium aluminate cement CaO 66.90 69.28 Al 2O 3 32.37 29.77 SiO2 0.39 0.14 MgO 0.07 0.18 Fe 2O 3 0.08 0.10 SO Investigations on the properties of Al2O3–MgO refractory castables bonded by in situ carbon containing calcium aluminate cement

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  • Heterogeneous Dissolution of Refractory Oxides in Molten

    Jun Seok Park Da Hye Kim Joo Hyun Park Thermodynamic Stability of Spinel Phase at the Interface Between Alumina Refractory and CaO–CaF2–SiO2–Al2O3–MgO–MnO Slags Journal of the American Ceramic Society 10.1111/jace.13570 98 6 () (2015).

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  • (PDF) Thermomechanical Behavior of High-Alumina Refractory

    in the porosity of the paste.11 12 Moreover microcracks develop in Compositions in the high-alumina region of the alumina– the interfacial zone between aggregates and paste at early ages of magnesia– calcia (Al2O3–MgO–CaO) ternary phase equilibrium concrete even without loading.13–15 In bending tests the concrete diagram present

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  • (PDF) Spinel-Coated Graphite for Carbon Containing

    After an able on castables prepared with this alumina-coated graphite.13 easy-to-use mixing procedure drying (1101C) and subsequent A lot of researchers also modified the graphite quality by the calcination (5501C) coated graphites were sieved to below 75 coatings of Al2O3

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  • Investigations on the properties of Al2O3–MgO refractory

    Aug 15 2018 · In this paper the properties including strengths oxidation resistance as well as corrosion resistance of Al 2 O 3 –MgO refractory castables bonded with Secar71 carbon back/S

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  • Types Of RefractoriesDifferent 10 Types of Refractories

    Price of high alumina refractory brick is per ton. Magnesite Refractory Magnesite is a group of carbonate mineral. Its formula is MgCO 3 with MgO 45-50 and CO 2 50-55 . They are unreactive to carbon dioxide. They have a high melting temperature and they are on-toxic in nature. They resist alkali slag attacks. Raw Materials

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