EXPERIMENTAL DETERMINATION OF THE COMPOSITION OF REFRACTORY CONCRETE BASED ON LIQUID GLASS BASED ON MS-500 HYDRAULIC PRESS TESTS

Abstract

The purpose of this study is to extend the service life of fluidized bed furnaces by utilizing secondary refractory materials and to evaluate the physico-mechanical properties of heat-resistant concrete through experimental and computational analysis. The work examines the efficiency of replacing traditional chamotte brick lining with a monolithic concrete structure. Liquid glass with sodium fluorosilicate was used as the primary binder, providing high strength and chemical resistance under temperatures up to 900 °C and exposure to aggressive environments (SO₃). Experimental results showed that concrete samples withstood up to 12–14 thermal cycles without destruction, confirming their thermal and mechanical stability. The obtained findings demonstrate that the heat-resistant concrete fully meets the technological requirements for fluidized bed furnaces. The use of secondary chamotte materials optimized the concrete composition, improved its thermal resistance and compressive strength, thereby enhancing furnace reliability, reducing maintenance downtime, and increasing overall production efficiency.