Silica Sol Bonded High Alumina Castable: Effect of Reduced Sol
1 National Institute of Technology, Rourkela Odisha – 769008/India
2 OCL Refractory Ltd., Rajgangpur, Odisha – 770017/India
Volume 7, Issue 2, Pages 83 - 87
Effect of reduction in sol content in no cement high alumina castable using water as partial replacement was studied. Different castable compositions, with different particles size distributions, were prepared and processed as per conventional castable making method. Pure silica sol and fixed amount of sol and rest water, as required for mixing and flowability, were added as bond material in the castables. Comparison in characteristics amongst the castables was done after heat treatment at different temperatures.
alumina castable, silica sol, water, processing, characterization
 Masaryk J.S.: Development and use of low cement self flow castables. Proc. UNITECR, São Paulo, Brazil (1993) 527–538  Banerjee S.: Recent developments in monolithic refractories. Amer. Ceram. Soc. Bull. 77 (1998)  59–63  Banerjee S.: Monolithic refractories – a comprehensive handbook. New York 1998  Banerjee S.: Versatility of gel-bond castable/ pumpable refractories. Refract. Appl. News 6 (2001)  1–3  Iler, R.K.: The chemistry of silica: Solubility, polymerization, colloid and surface properties, and biochemistry. New York (1979)  Das, S.K.; et al.: No cement high alumina self flow castable. Amer. Ceram. Soc. Bull. 82 (2003)  55–59  Mukhopadhyay, T.K.; et al.: Effect of synthetic mullite aggregate prepared by hydroxyl-hydro gel method on sol bonded clay based mullite castable. Amer. Ceram. Soc. Bull. 84 (2005)  9101–9106  Sarkar R.; Mukherjee, S.; Ghosh, A.: Gel bonded Al2O3-SiC-C based blast furnace trough castable. Amer. Ceram. Soc. Bull. 85 (2006)  9101–9105 (www.ceramicbulletin.org)  Xiong, J.Q.; et al.: The characteristics of silicasol combining refractories. Adv. Mater. Res. 396–398 (2011) 288–291  Nouri-Khezrabad, M.; et al.: Nano-bonded refractory castables. Ceram. Int. 39 (2013)  3479–3497  Ismael, M.R.; et al.: Colloidal silica as a nanostructured binder for refractory castables. Refractories Appl. News 9 (2006)  16–20  Lidén, E.; Karlsson, S.; Tokarz, B.: Silica sols as refractory fiber binders. J. Europ. Ceram. Soc. 21 (2001)  795–808  Silva, A.P.; Segadaes, A.M.: Particle size distribution design in a self-flow alumina refractory castable without cement. Adv. in Sci. and Technol. 45 (2006) 2260–65  Singh, A.K.; Sarkar, R.: Effect of binders and distribution coefficient on the properties of high alumina castables. J. Australian Ceramics Soc. 50 (2014)  93–98  Sarkar, R.; Satpathy, A.; High alumina self flow castable with different binders. refractories WORLDFORUM 4 (2012)  98–102  Ghosh, S.; et al.: Microstructures of refractory castables prepared with sol-gel additives. Ceram. Int. 29 (2003)  671–677  Anjos, R.D.; et al.: Rheometric techniques applied to refractory ceramic suspensions. Refractories Appl. News 11 (2006  8–13  Dos Anjos, R.D.; et al.: Workability and setting parameters evaluation of colloidal silica bonded refractory suspensions. Ceramics Int. 34 (2008)  165–171  http://www.bocedwards.com/pdf/handling filtration slurry SST Nov04.pdf  http://www.leco.org/customersupport/mettips/ met tip22.pdf  http://www.colloidalsilica.com/files/Brosjyre- BindzilCC.pdf  Dinger D.R.; Funk, J.E.: Particle packing III – Discrete versus continuous particle sizes. Interceram 41 (1992)  332−334  Myhre, B.; Hundere, A.S.: The use of particle size distribution in development of refractory castables. Proc. XXV ALAFAR Congress, San Carlos De Bariloche, Argentina, Dec. 1−4 (1996)  Sarkar, R.; Parija, A.: Effect of alumina fines on high alumina self-flow low cement castables. refractories WORLDFORUM 6 (2014)  73−77  Fang, H.S.; Cha, C.H.; Yong, S.Y.: Development of self-flow castable. Proc. UNITECR Kyoto (Japan) 1 (1995) 264–271
Göller Verlag GmbH