Soapstone bricks use natural high-silica pyrophyllite ore as the main raw material, combined with clay and silica micro-powder, formed by mechanical pressing and fired at high temperature. They have characteristics such as high refractoriness, low thermal conductivity, and high residual linear change rate. They exhibit continuous expansion with increasing temperature, thus reducing joint gaps and maintaining excellent integral performance, effectively suppressing the impact of shell thermal expansion on the lining.