Development Direction of BF Taphole Clay

The binder for taphole clay underwent four stages: water-based taphole clay , tar taphole clay , high-performance tar taphole clay and resin taphole clay . At the same time, with the increase of blast furnace size and volume, the properties of taphole clay have changed from silicon to high aluminum. At the same time, according to the requirement of environment, the traditional coal tar composition is improved to improve the working environment before furnace; To extend the time of the iron, the researchers add SiC in stemming, Si3N4 and vanadium containing special carbon soil, fused aluminum oxide raw materials, make the performance of taphole clay  has improved greatly, the conditional stability of iron, taphole not expanding, hot metal and slag flow stability, but because of high strength, need special drilling machine can open hole of iron.