Physicomechanical properties and structure of mullite-corundum unmolded refractories are investigated and tests of a pilot batch of refractory products for various purposes are conducted. The effect of the adding nanosize SiO2 (1 wt.%) on strength, structural (density, porosity) and operational properties of unmolded refractories is studied. Results show that this additive contributes to formation of a structure with high apparent density and compressive strength (2.93 and 2.98 g/cm3, 87.3 and 162.1 MPa, respectively for two types of refractories), reduces open porosity from 20 to 14%, and also increases the life of refractory products (according to operating duration) by 25 – 35% compared with basic refractory life. The use of SiO2 nanoparticle additives reduces refractory product and raw material consumption for their manufacture, and also increases production profitability.
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Translated from Novye Ogneupory, No. 9, pp. 44 – 48, September, 2022.
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Suvorov, D.S., Khaidarov, B.B., Lysov, D.V. et al. Effect of Adding Nanosize SiO2 on Physicomechanical Properties and Durability of a Refractory Component Industrial Batch. Refract Ind Ceram 63, 522–526 (2023). https://doi.org/10.1007/s11148-023-00760-x
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DOI: https://doi.org/10.1007/s11148-023-00760-x