Pouring process requirements:

Steel material selection and use and material composition test

Molten steel temperature

Temperature and time of shell culture

Pouring temperature

Charging: the furnace charge must be clean and free of rust, oil stains, sundries, etc. during charging, the furnace charge shall not exceed the height of the induction ring. The long furnace charge shall be vertically loaded into the furnace and strive to be "loose at the top and tight at the bottom".

The alloy addition sequence of adjusting composition should be reasonable, and attention should be paid to temperature adjustment Some refractory elements with high density should be added first, while alloy elements with high affinity to oxygen must be added under the condition of good deoxidation, and the temperature should not be too high to reduce burning loss. Each time alloy elements are added, the heating time must be determined according to the amount added.

Deoxidation shall be strictly carried out. In the whole smelting process, the mold head with slag discharged for 5-7 times and water-cooled must be roasted before returning to the furnace, and the alloy can be melted

Preheating shall be carried out before adding, the amount of adding shall be strict, and the operation and maintenance shall be carried out in strict accordance with the equipment operation and maintenance requirements. During the smelting process, pay attention to the inspection of the furnace to prevent penetration into the furnace.