Refractory concrete lining for a hot-blast valve

Abstract

This paper gives a brief description of the composition, technology and main properties of a high-alumina concrete that has been used for making the lining of the disk and rings of a hot-blast valve. The tenon and honeycomb types of concrete reinforcement have been tested in the linings of experimental valves. The results of the tests of the experimental valves in the blast-furnace shop of the Azovstal' Integrated Works have demonstrated that the lining with the tenon-type reinforcement is in fairly good condition. Due to the use of the concrete lining, the heat losses through a valve have been decreased by a factor of 1.5 – 2, the hot-blast temperature increased by 10 – 12°C, and the average service life of valves, by a factor of two.