Abstract:

This paper studies the blast heater refractory erosion caused by HCl in blast furnace gas. It is found that in clay bricks, HCl gas can promote the transformation from silicate glass phase and recessive aluminum silicate into mullite and cristobalite and in silica bricks, HCl gas also can promote the transformation from cristobalite into tridymite,however obviously decreases the degree of crystallinity of the particles and leads to cracks because of the irregular expansion of the particles.