Effect of Particle Size Distribution of Raw Materials on Properties of Magnesia-Alumina Refractory

Abstract:

Starting from different sizes of magnesia and bauxitewith sodium hexametaphosphate as anchoring agent, specimens obtained by suppression were sintered at 1500°C and 1550°C and heat preservation for 3h in the electric hearth furnace, respectively. The effect of particle size distribution of magnesia and bauxite on the properties of magnesia-alumina refractory materials was investigated. The composition of magnesia-alumina refractory which consists of various particle size distributions was determined, according to Andreasen packing model, with distribution coefficient (q) of 0.15, 0.20, 0.25, 0.30, 0.35, 0.40 and 0.50. The fractographs of the specimen were observed by scanning electron microscopy. The linear rate of change, apparent porosity, bulk density and crushing strength of these specimens were studied. The results showed: a crushing strength of 52.39 MPa, an apparent porosity value of 15.55% and a bulk density value of 2.91 g/cm³ were obtained via a particle size distribution coefficient of 0.30 at 1550°C. Simultaneously, the refractory materials had small linear rate of change.

• Periodical: Key Engineering Materials (Volume 697)
• Pages: 595-598
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.697.595
• Online since: July 2016
• Authors: Zhin An Chai, Cheng Ji Deng, Hong Xi Zhu, Xiao Jun Zhang, Liang Yi Zhou
• Keywords: Apparent Porosity, Bulk Density, Crushing Strength, Magnesium-Aluminum Refractory, Particle Size Distribution Coefficient

References

[1] K.Q. Liu, J. Naihuo Cailiao (Refractory, Chinese version) 40 (2006) 177-181.

[2] P.W. Zhang, X.C. Li, B.Q. Zhu, J. Chin. Refract. 3 (2013) 28-31.

[3] H.X. Li, Refractory application manual, first ed., Metallurgical Industry Press, Beijing, (2007).

[4] Z.D. Wang, K.J. Cao, J.Y. He. Induction Furnace Smelting, first ed., Chemical Industry Press, Beijing, 2007, pp.50-52.

[5] J.J. Li, Y.L. Xie, J. Non-metal. Miner. 4 (1996) 3.

[6] N. Li, H.Z. Gu, H.Z. Zhao, Refractory Materials, first ed., Metallurgical Industry Press, Beijing, 2010, pp.185-197.

[7] A. Cemail, R. Brian, R. Frank, P. D. Warren, J. Eur. Ceram. Soc. 22 (2002) 745–754.

[8] J. Kiennemann, E. Chabas, C. Ulrich, China's Refract. 24 (2015) 63-68.

[9] Y.K. Kalpakli, Arch. Mater. Sci. Eng. 34 (2008) 81-88.

[10] D.R. Dinger, J.E. Funk, Interceram 41 (1992) 95-97.

[11] H.B. Liu, J. Chin. Ceram. Soc. 19 (1991) 164-172.

[12] R.N. Lumley, G.B. Schaffer, Scripta mater. 39 (1998) 1089-1094.

[13] D.R. Dinger, J.E. Funk, Interceram 41 (1992) 332-334.

[14] I.I. Nemets, V.V. Strokova, V. Zubashchenko, Indust. Ceram. 45 (2004) 214-216.