The Effect of Temperature on the Fundamental Characteristics of Self-Compacting No-Cement Refractory Castable

Abstract:

In this research, the impact of firing temperature and MgO addition on mechanical and physical properties of self–compacting no-cement castables were investigated. For this propose up to 3.3 wt % of MgO was added to the corundum castable compositions and the specimens were fired at 600 °C, 800 °C, 1000°C, 1200°C and 1500°C. The mixtures were made so that the consistency of each one was the same. There were only minimal differences in the mixtures water content. The mineral composition of the input raw materials for manufacturing of the refractory castables was determined. The physical and mechanical properties of castable compositions such as self-flow values, bulk density, apparent porosity, cold crushing strength and flexural strength were examined. Also, the X-ray diffraction (XRD) and scanning electron microscopy (SEM/EDX) techniques were used for detection the ceramic phase formation. The corrosion resistance was determined by means of the crucible test according to ČSN P CEN/TS 15418 (726022) Method of test for dense refractory products – Guidelines for testing the corrosion resistance of refractories caused by liquids. The study follows up on research, the results of which were published last year [1], but the study is focused to self-compacting refractory castable.

• Periodical: Key Engineering Materials (Volume 760)
• Pages: 132-138
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.760.132
• Online since: January 2018
• Authors: Lenka Nevřivová
• Keywords: Corundum Refractory Castables, Refractory Castable Corrosion, Self-Compacting Refractory Castable

References

[1] L. Nevrivova, MgO Influence on the Fundamental Characteristics of Corundum Refractory Castables, Key Engineering Materials, Vol. 722, pp.81-86, (2017).

DOI: 10.4028/www.scientific.net/kem.722.81

[2] M. Bugajski, R. Schwaiger, Self-flowing castables — A new type of unshaped refractory products, Veitsch-Radex Rundsch., Austria 1 (1996) 44–52.

[3] W. Kriechbaum, V. Gnauck, G. Routschka, The influence of SiO2 and spinel on the hot properties of high alumina low cement castables, XXXVIIInt. Refractory-Colloquium on Refractories, Aachen, Germany, Verlag Stahleisen: Du¨sseldorf, Germany, (1994).

[4] J.S. Masaryki, R.A. Steinke, R.B. Videtto, Development and use of low cement self-flowing castables, Proceedings of Unified International Technical Conference on Refractories, UNITECR '93, Association Latinoamericana de Fabricantes de Refractories: Sao Paulo, Brazil, (1993).

[5] W.E. Lee, R.E. Moore, Evolution of in situ refractories in the 20th century. Journal American Ceramic Society, 81 (1998) 1385-1410.

DOI: 10.1111/j.1151-2916.1998.tb02497.x

[6] A.P. da Luz, M.A.L. Braulio, V.C. Padolfelli, Refractory Castable Engineering, Baden-Baden Germany (2015), 3-10.

[7] A. Nishikawa, Technology of monolithic refractories. Japan (1984) 101-114.

[8] A.P. da Luz, M.A.L. Braulio, V.C. Padolfelli, Refractory Castable Engineering, Baden-Baden Germany (2015), 3-10.

[9] J. Baldo, A.C. Morelli, The effect of the matrix mass fraction and the defloculant type on the development of a self flowing low cement refractory concrete, UNITECR '95, Technical Association of Refractories Japan: Kyoto, Japan, 1995, p.90–92.

[10] B. Myhre, Strength development of bauxite based ultralow-cement castables, Am. Ceram. Bull. 73 (1994) 5.

[11] K. Watanabe, M. Ischikawa, M. Wakamutsu, Rheology of castable refractories, Taikabutsu Overseas 9 (1) (1989) 41–53.

[12] C. Parr, E. Spreafico, T.A. Bier, A. Mathieu, Calcium Aluminates Cements (CAC) for Monolithic Refractories, Technical paper References F 97, LAFARGE Aluminates, 75782 Paris, Cedex 16, (1997).