The quality of the furnace construction seriously affects the service life of the electric furnace. Therefore, in order to ensure the quality of the furnace repair, all personnel involved in the furnace construction must be strictly implemented in accordance with the operating system.

1. Preparation before building the furnace: Before building the furnace, it must be ensured that the entire furnace is clean and free of iron impurities; the yoke is in a fastened state
2. All furnace building personnel are not allowed to carry anything except furnace building tools, and are not allowed to smoke.
3. It is strictly forbidden to drop any sundries into the furnace during the furnace building process.
4. First choose a suitable crucible, and the outer surface is polished, carefully derusted, and air holes are punched out.
5. Lay the asbestos cloth carefully, and keep the asbestos cloth flat so as not to affect the thickness of the furnace lining. And correctly connect the alarm line and alarm network to ensure the safe operation of the electric furnace.
6. Lay the furnace bottom carefully, the thickness of the furnace bottom should be 260mm-290mm. Furnace building materials are poured into the bottom of the furnace twice. For the first time, six bags (150 kg) are alternately tamped with a three-pronged fork (about 15 minutes), and then 12 bags (300 kg) are also alternately tamped. Then use the furnace builder to vibrate for more than 20 minutes, measure the height of the bottom of the furnace and level it, then carefully put it into the crucible, try to make the distance between the furnace walls around the crucible equal. (around 13.5mm).
7. Three bags (75KG) are evenly poured into the outside of the crucible each time for building the furnace, and tamped alternately for 5-10 minutes each time. Until it is filled and parallel to the crucible barrel. Note that at least three layers at the bottom should be fully tamped, because the furnace builder at the bottom cannot vibrate at all. During the vibration process, every three to five centimeters is a knotting surface, and each knotting surface vibrates for more than 5 minutes. Until the vibration reaches about 30 cm from the crucible.
8. The furnace lining should be finished at one time, and resolutely prevent it from starting again the next day, so as to prevent dust from entering the isolation furnace lining material.