Semi-silica refractory brick introduction

Semi-silica refractory brick is refractory bricks produced with pyrophyllite as the main raw material, and their refractoriness is greater than 1700°C. It has good thermal shock resistance, can withstand the impact of steel slag and metal, and has strong creep resistance.

Semi-silica refractory brick introduction

Semi-siliceous bricks made of waxstone. Micro-expansion will occur. Due to the mineral composition of pyrophyllite, the lattice size in the crystal structure of pyrophyllite changes little when heated, so it shrinks little during roasting and sometimes expands slightly. During the high-temperature use of semi-siliceous bricks, pyrophyllite reacts with acidic slag, forming a layer of glaze-like substance with high viscosity on the surface of semi-siliceous bricks, which prevents acidic slag from penetrating the brick and resists acidic slag. The erosion ability is also quite good.

Application range of semi-silica bricks

The use range and dosage of semi-siliceous bricks are not as large as silica bricks and are extremely limited. Although it can be used in ladle bottom linings, hot metal ladle linings, and flues, the amount of semi-siliceous bricks is minimal due to the improvement in steel quality requirements.