Advanced Anorthite Lightweight Castables for Carbon-Containing Atmosphere Application

Inna U. Kostyrko, Valeriy V. Martynenko, Vladimir V. Primachenko, Natalya M. Kaznacheeva

JSC – The Ukrainian Research Institute of Refractories named after A.S. Berezhnoy, 61024 Kharkiv/Ukraine

Revision 27.04.2018, 02.05.2018

Volume 10, Issue 3, Pages 77 - 83

Abstract

Heat insulating refractories have been widely adopted owing to the low thermal conductivity that permit reducing heat losses through the lining of furnaces, to reduce a consumption of energy carriers in thermal units. Use of heat insulating castables allows executing lining in places where its performance by shaped refractories is impossible. Two types of heat insulating castables based on anorthite microporous aggregate with an apparent density of 0,8 g/cm and 1,3 g/cm are developed, the possibility of their use in carbon­containing atmospheres at temperatures up to 1200 °C is established. Phase formation in the castable matrixes is studied, as well as the formation of secondary anorthite in the matrix is established that promotes resistance of the castable to carbon­containing atmosphere infuence.

Keywords

heat insulating castables, anorthite, microporous aggregate, carbon­containing atmosphere

References

[1] Routschka, G.; Wuthnow, H.: Refractory materials: Design, properties, testing. 3rd ed., Essen 2008, 376–378 [2] Dergaputskaya, L. A.; Gaodu; A. N., Litvin, L. G.: Anorthite lightweight refractories for service in the carbon containing atmosphere. Ogneupory (Refractories) 7 (1980) 40–42 [3] Primachenko, V. V.; et al.: Anorthite lightweight material with microporous structure. Proc. of UNITECR ’01, Cancún, Mexico, 2001, 1193–1195 [4] Primachenko, V. V.; et al.: The research of an infuence of a number of technological factors on anorthite synthesis in lightweight refractories. Proc. of UNITECR ’03, Osaka, Japan, 19–22 October 2003, 190–193 [5] Primachenko, V. V.; et al.: The study of the temperature dependence of the thermal conductivity of lightweight heat insulating refractories with a microporous structure. Proc. of the 4th Int. Symposium on Refractories, Dalian, China, 24–28 March 2003, 358–361 [6] Primachenko, V. V.; et al.: High­Performance heat insulating castable with microporous anorthite aggregate. Proc. of UNITECR ’07, Dresden, Germany; 19–21 September 2007, 125–129 [7] Primachenko, V. V.; et al.: The research into the properties of thermal insulating microporous anorthite after thermal treatment in carbon-containing medium. Proc. of UNITECR ’09, Salvador, Brazil; 13–16 September 2009

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