The professional terms commonly used in the use of anhydrous taphole clay:
①The depth of the taphole: refers to the distance between the outside of the taphole and the taphole clay formed by the taphole clay in the furnace.
②Tidal taphole: Tidal taphole means that the taphole clay is not completely sintered, and the carbon-containing binder is not carbonized. The volatile matter explodes when the molten iron meets high temperature during tapping, causing the molten iron slag to splash, or even eject from the taphole like a rocket ;
③Iron seepage: When the taphole clay is in the tapping hole, a small amount of molten iron flows out when the depth is not reached, blocking the drill pipe is iron seepage.
④ Running a large flow: The outflow of molten iron in the blast furnace is too large in a short time, which causes the iron ditch to be unable to be discharged in time.
⑤Incoming wind: When the molten iron flows out, the liquid level in the furnace drops to the position of the iron hole, causing the gas in the furnace to be discharged from the iron hole to emit yellow smoke, which is what we call "incoming wind".
⑥Sinterability: The taphole clay can achieve different degrees of sintering in the three temperature stages of low temperature, medium temperature and high temperature. The iron hole is blocked in time, and a large enough "mud bag" is formed in the hearth to protect the lining bricks of the cylinder. effect.
⑦Adhesiveness and plasticity: The new taphole clay must have good adhesion and plasticity with the old taphole clay in the hole. When the taphole clay is deformed but not cracked under the action of external force; it can maintain its shape after the external force is removed without any changes, the old and new taphole clay can be integrated to prevent iron seepage and leakage due to the existence of cracks, affecting the blast furnace tapping and safety accidents in front of the furnace, thereby playing the role of maintaining the iron hole.
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