Academic literature on the topic 'Monolithic Refractory'

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Journal articles on the topic "Monolithic Refractory"

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Zamyatin, V. A., and I. V. Egorov. "Heating furnace monolithic refractory lining." Refractories and Industrial Ceramics 49, no. 2 (March 2008): 75–78. http://dx.doi.org/10.1007/s11148-008-9030-6.

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Cutard, Thierry, Nicolas Donval, Aurélien Mazzoni, Claire Michel, and Fabien Nazaret. "Thermomechanical Characterization of Monolithic Refractory Castables." Advances in Science and Technology 70 (October 2010): 37–46. http://dx.doi.org/10.4028/www.scientific.net/ast.70.37.

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This paper deals with the characterization of the thermomechanical behavior of monolithic refractory castables in a wide temperature range, up to 1200°C. Different test types are considered: tensile tests, compression tests, bending tests and tests on more complex shapes and geometries. A particular attention is paid to the detailed characterization and interpretation of the non-linear behaviors of these materials. Monotonic, cyclic and creep tests are considered. In some cases, digital image correlation (DIC) methods can be coupled to mechanical tests to obtain strain fields. Such results are particularly interesting to observe and to understand damage processes. As damage is a major characteristic of the monolithic castable behaviors, links are established between the thermomechanical behavior and damage mechanisms. Two main scales are taken into account for damage characterization: the macroscopic and the microscopic ones. Main mechanisms that are considered deal with microcracking, macrocracking, debonding and cavitation. Two types of materials are considered: non-reinforced and fiber reinforced refractory castables.
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Goski, Dana, and Matthew Lambert. "Engineering resilience with precast monolithic refractory articles." International Journal of Ceramic Engineering & Science 1, no. 4 (September 23, 2019): 169–77. http://dx.doi.org/10.1002/ces2.10024.

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Schmitt, N., Y. Berthaud, J. F. Hernandez, P. Meunier, and J. Poirier. "Damage of monolithic refractory linings in steel ladles during drying." British Ceramic Transactions 103, no. 3 (June 2004): 121–33. http://dx.doi.org/10.1179/096797804225012873.

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Goberis, S., and V. Antonovich. "The Monolithic Refractory Lining for Furnaces Fired by Wood Fuel." Refractories and Industrial Ceramics 44, no. 5 (September 2003): 295–97. http://dx.doi.org/10.1023/b:refr.0000009033.81186.53.

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Wynn, Andy, John Coppack, Tom Steele, and Gary Latter. "Improved Monolithic Materials for Lining Aluminium Holding and Melting Furnaces – Roof, Upper Walls and Flue." Materials Science Forum 693 (July 2011): 80–89. http://dx.doi.org/10.4028/www.scientific.net/msf.693.80.

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Monolithic refractories are now well established as linings for a range of holding and melting applications for the processing of aluminium. The refractory lining in an aluminium furnace has to withstand a wide variety of physical and chemical environments. Each of the different furnace zones presents a different set of operating conditions, in terms of peak temperature, temperature fluctuation, metal contact, flux contact, impact from ingot loading, etc. Therefore, in order for a monolithic material to successfully perform in a particular area of the furnace, it needs to be able to cope with the specific environmental conditions in that region of the furnace. Aluminium producers continue to increase productivity through their Melt-Hold furnaces to maintain competitiveness. The use of more powerful burners to increase heat input to the furnace is therefore becoming increasingly common practice. But faster melting leads to increased metal losses from surface oxidation and to segregation from large heat gradients. These effects are countered by increased use of fluxes and increased stirring. Given the increasingly challenging environment within which the refractory lining has to work, traditional lining solutions can no longer be relied upon to provide the service lives that were previously achieved. Therefore, a new generation of furnace lining materials is required to cope with today’s aluminium furnace. This paper describes one such newly developed monolithic material, designed specifically to improve performance in the superstructure zone of Aluminium furnaces. The non-metal contact, superstructure regions of aluminium furnaces present their own unique set of challenges for the refractory lining. Refractories in these regions – roof, upper walls and flue – have to cope with excessively high levels of alkali vapour and thermal shock. This paper reviews the operating conditions found in the superstructure areas of a typical melting and holding furnace and the implications these have on monolithic lining material design and performance. The improved behaviour of the newly developed monolithic material against the critical performance criteria in these furnace regions is demonstrated in the laboratory, compared to existing industry leading materials, using industry standard test methods.
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Angelescu, Nicolae, Dan Nicolae Ungureanu, and Florin Toma. "Special Refractories Resistant to the Melt Metals and Slags Attack." Scientific Bulletin of Valahia University - Materials and Mechanics 17, no. 16 (May 1, 2019): 28–31. http://dx.doi.org/10.2478/bsmm-2019-0004.

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Abstract The paper is an attempt to present and evaluate of the some monolithic refractory materials, originating from our research activity, with potential to be used as the thermoprotective linings for the nonferrous metals and ferrous alloys manufacturing installations in foundries and steelworks.
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Sugawara, Mitsuo, Seiya Hagihara, and Michihiko Nakagaki. "Nonlinear Finite Element Analysis of Alumina-Magnesia Monolithic Refractory Lining Material." Key Engineering Materials 247 (August 2003): 245–50. http://dx.doi.org/10.4028/www.scientific.net/kem.247.245.

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Osoba, Lawrence Opeyemi, and Ayo Samuel Afolabi. "Suitability of Nigerian Rocks as Refractory Materials for Monolithic Furnace Lining." Particulate Science and Technology 30, no. 3 (May 2012): 209–19. http://dx.doi.org/10.1080/02726351.2011.555936.

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Khajornboon, Jiraprabha, Kouichiro Washijima, and Takeshi Shiono. "Fracture Energy and Fracture Toughness of In Situ Calcium Hexaluminate (CA6)-Alumina Monolithic Refractory." Key Engineering Materials 766 (April 2018): 77–82. http://dx.doi.org/10.4028/www.scientific.net/kem.766.77.

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One of main raw materials for monolithic refractory is calcium aluminate cement which provides CA6 hexagonal plate-like microstructure with self-toughening properties and fracture resistance. In the present study, in-situ CA6 was formed by using sintered alumina mixing with alumina cement in stoichiometric composition to achieve 100 mass% and 50 mass% of CA6 in alumina monolithic refractory with 2 mass% of silica addition. Samples were fired from 1400-1500°C for 5 h and characterized for physical and mechanical properties. The results showed that both samples could not obtain CA6 content as expected and apparent porosity did not exhibit in the same tendency. However, only proper amount of CA6 content could gain proper amount of apparent porosity which is the main effect of mechanical properties. Especially the formation of CA6 lower than 50 mass% with the presence of low melting phase caused low apparent porosity and led to high fracture toughness and effective fracture energy.
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Dissertations / Theses on the topic "Monolithic Refractory"

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Morel, Bayram Murat. "Investigation Of The Effects Of Temperature On Physical And Mechanical Properties Of Monolithic Refractory Made With Pozzolanic Materials." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606700/index.pdf.

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In recent years, scientific studies are carried out to find new refractory material. Having good mechanical properties under very high temperatures, refractories are widely used in industries like iron, steel, glass, cement and pottery. Researches are focused on monolithic refractory making because of their superior properties comparing to conventional firebrick refractories. Providing a mono-block body, having no joints makes the monolithic refractories more durable at elevated temperatures. Easier production and installation are two main points that people are choosing monolithic refractories, thus an economy is made. In this study, for monolithic refractory production, high alumina cement was used as binding material. It is known that the increase in alumina (Al2O3) content increases the high temperature resistance, so that crushed firebrick, having 85% Al2O3 was used as aggregate. Pozzolanic materials, which are silica fume, fly ash, ground granulated firebrick and ground granulated blast furnace slag, were added to improve physical and mechanical properties of mortar. With the addition of steel fibres, change in compressive strength and flexural strength was observed.Superplasticizer was used to understand its behaviour under high temperatures. Portland cement containing mortars were also prepared to make comparison with high alumina cement containing specimens. Specimens were prepared in 5x5x5 cm and 4x4x16 cm prisms. They were cured for one day at curing room, then heated to 105°
C and then heated to 1100°
C. Weight, size and ultrasound velocity change, compressive strength and flexural strength tests were done to determine physical and mechanical properties of the monolithic refractories, before and after heating. Heated and non-heated specimens were pulverized for microstructural investigation with X-Ray diffraction (XRD) method. Using high alumina cement with 50 &ndash
60 % granulated blast furnace slag or granulated firebrick, by the weight of cement, and crushed firebrick as aggregate, a satisfactory monolithic refractory material was made. It was observed that, mechanical properties were decreased at the Portland cement used mortars after several times of heating and cooling cycles. Also, it was determined that the microstructure of the high alumina cement containing mortars did not deteriorate much at 1100°
C, as long as there was no change observed from the results.
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Ilbury, M. W. "Stress evaluation of a monolithic refractory concrete rotary calciner lining for Tioxide Southern Africa." Thesis, 1993. http://hdl.handle.net/10321/2856.

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Books on the topic "Monolithic Refractory"

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Monolithic Refractories: A Comprehensive Handbook. Wiley-American Ceramic Society, 1998.

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1940-, Fisher Robert E., ACI Committee 547, Refractory Concrete., American Ceramic Society, American Ceramic Society Meeting, and International Symposium on New Developments in Monolithic Refractories (1984 : Pittsburgh, Pa.), eds. New developments in monolithic refractories. Columbus, Ohio: American Ceramic Society, 1985.

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Book chapters on the topic "Monolithic Refractory"

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Zirczay, G. N. "Monolithic Refractory Problems in a Gasifier." In Ceramic Engineering and Science Proceedings, 293–300. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470320310.ch27.

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Otake, Ryo, Hitoshi Sawada, Koji Nakanishi, and Ko Kobayashi. "Development of a Monolithic Refractory using Spent Refractories." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 597–601. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch103.

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Decker, J. "Phosphate Bonded Monolithic Refractory Materials with Improved Mechanical and Chemical Resistance for Applications in the Aluminum Industry." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 1273–78. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch215.

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Malkmus, Patrick, Pierre Meunier, and Jérôme Soudier. "Time, Energy and Cost Saving During Monolithic Refractory Lining Installation by Combining Quick Dry Technology and Gunning Technics." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 1007–12. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch171.

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Carden, Zena, Andrew J. Brewster, David Bell, and Ian Whyman. "Evaluation of Thermal Conductivity of Refractory Monolithics by Various Methods and the Issues this Raises." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 319–26. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch56.

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Sarkar, Ritwik. "Unshaped (Monolithic) Refractories." In Refractory Technology, 241–74. CRC Press, 2016. http://dx.doi.org/10.1201/9781315368054-13.

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Conference papers on the topic "Monolithic Refractory"

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Ling, Qin, and Li Zhi. "Optimization for Grain Gradation of Monolithic Refractory Based on Ant Colony Algorithm." In 2010 International Conference on Electrical and Control Engineering (ICECE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icece.2010.356.

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Stephan, Patrick M. "Development and Testing of a High Thermal Conductivity Refractory Tile System in a Waste-to-Energy Combustion Unit." In 15th Annual North American Waste-to-Energy Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/nawtec15-008.

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Refractory systems are used for tube wall protection in waste-to-energy (WTE) boilers. Through the years, continuous adjustments have been made to the refractory materials and product designs. Design modifications have incrementally improved tile systems from bolt-on to hidden-clip to back-cast systems. Different refractory types, such as gunning cements and other monolithics, have also been used with varying degrees of success. A new refractory system is currently evolving, borrowed from other advanced high temperature applications and adapted to fit WTE boiler designs. This new system is a radical change in design from conventional refractory systems.
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Aguirre, M. E., G. Hayes, M. Frecker, J. Adair, and N. Antolino. "Fabrication and Design of a Nanoparticulate Enabled Micro Forceps." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49917.

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A novel fabrication process and design optimization method for a micro forceps is presented. This work is part of a larger research effort to design and fabricate nanoparticulate enabled surgical instruments. The micro forceps is a monolithic compliant mechanism that due to its two-dimensional design can be manufactured using the new fabrication process. The process begins with fabrication of an array of molds on refractory substrates using a modified UV lithography technique. In parallel, engineered ceramic nanocolloidal slurries are prepared for gel-casting into the molds. Mold infiltration takes place via a squeegee technique adapted from screen printing with excess slurry removed using an ethanol wipe. Finally, the photoresist molds are removed with a reactive ion etch (RIE) step, and ceramic parts sintered to full density. Employing this manufacturing technique for the compliant micro forceps design is advantageous because a large number of parts can be produced with a large aspect ratio (≥40:1), sharp edges (∼ 1 μm), and a resolution of 2 μm. Two optimization problems are formulated to determine the effect of dimensional parameters and material strength on the performance of the compliant micro forceps. First, performance is sensitive to small changes in the geometry, indicating that dimensions and shrinkage rates must be carefully controlled during processing. Second, performance can also be improved by using very large aspect ratios and/or improvements in material strength. A sample part manufactured using the new process is presented.
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Gururaja, Suhasini, and Abhilash Nagaraja. "Effect of Microporosity on Damage Initiation in Ceramic Matrix Composites." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91908.

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Abstract Ceramic matrix composites (CMC) are a subclass of composite materials consisting of reinforced ceramics. They retain the advantages of ceramics such as lower density and better refractory properties but exhibit better damage tolerance compared to monolithic ceramics. This combination of properties make CMCs an ideal candidate for use in high temperature sections of gas turbines. However, modeling the damage mechanisms in CMCs is complex due to the heterogeneous microstructure and the presence of processing induced defects such as matrix porosity. The effect of matrix pore location and orientation on damage initiation in CMCs is of interest in the present work. CMCs fabricated by various fabrication processes exhibit matrix pores at different length scales. Microporosities exist within fiber bundles in CMCs have a significant effect on microscale damage initiation and forms the focus of the current study. In a previous work by the authors, a two step numerical homogenization approach has been developed to model statistical distribution of matrix pores and to obtain the effective mechanical properties of CMCs in the presence of matrix porosity. A variation of that approach has been adopted to model matrix pores and investigate the severity of pores with respect to their location and orientation. CMC microstructure at the microscale has been modeled as a repeating unit cell (RUC) consisting of fiber, interphase and matrix. Ellipsoidal pores are modeled in the matrix with pore distance from the interphase-matrix interface and pore orientation with respect to the loading direction as parameters. Periodic boundary conditions (PBCs) are specified on the RUC by means of constraint equations. The effect of the pore on the local stress fields and its contribution to matrix damage is studied.
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Stein, Thekla, Olaf Krause, and Michael Hoft. "Microwave investigation of the drying behavior of CA-cement bonded refractory monolithics." In 2021 13th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances (ISEMA). IEEE, 2021. http://dx.doi.org/10.1109/isema49699.2021.9508273.

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Mulch, Stephan. "Boiler Wall Protection With Rear Ventilated Refractory Tiles." In 2013 21st Annual North American Waste-to-Energy Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nawtec21-2703.

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The prevention of corrosion on boiler tube-walls has been a most difficult and cost intensive problem in WTE plants. This is specifically the case where the incineration boilers are operating with increased saturated steam temperatures and their corresponding pressures. In addition, variations in the garbage mixtures, with differing values of chemical content and varying waste composition give importance to the prevention of boiler tube corrosion. Several refractory lining systems and types have been installed over the previous 80 years and can be compared. In the early stages it began with simple concrete installations and only later was it developed to use heat resistant ceramic products, now essentially silicon carbide. 20 years ago cement or chemically bonded SiC monolithics (gunning, trowelling or casting materials) were usually installed to protect boiler walls, but today fabricated and fired SiC tiles, with their enhanced properties, are mainly used. A distinction is made between hanging and bolted tiles, as well as between oxide bonded and nitride bonded SiC material and between mortared, backfilled and rear ventilated tiles. All these systems were carefully examined and assessed. It proved possible to develop a revolutionary heat conduction and corrosion protection system utilising air. An air gap between the refractory SiC tiles and the boiler wall proved to be both simple and successful. By means of detailed and systematic documentation and monitoring, including J + G’ s “Air” tiling system, it has, for a few years, been possible to offer and recommend long lasting refractory linings with the aim of protecting boiler walls against corrosion, reducing operating costs and using the energy of the waste in an optimum manner.
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