During the melting process, due to the sticky conditions of the furnace, shallow insertion of clicks, and calibration of the crucible, the surface of the material is poorly breathable and flammable. For this reason, breathable holes must be inserted, that is, round steel is inserted into the airtight part of the fabric. Do not open it. This method is often used in ferrosilicon smelting to increase air permeability.
Parts in which ventilated lugs should be pierced:
1. The lower part of the vertebral body or a large surface area of the material has poor air permeability.
2. Bite around the fire site.
Piercing the ventilated eyes can achieve the following goals:
1. Make the large amount of carbon monoxide produced after the reaction come out quickly, which not only increases the preheating surface of the furnace material, but also improves the air permeability of the material surface, expands the crucible, and accelerates the chemical reaction in the furnace.
2. Reduce the ignition phenomenon and reduce heat loss.
