Precautions For Ferrosilicon Smelting Process

Ferrosilicon is a deoxidizer in the steelmaking industry. In steelmaking, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation. In the cast iron industry, it is used as an inoculant and spheroidizing agent. In the production of ductile iron, ferrosilicon is an important inoculant and spheroidizing agent. It is used in ferroalloy production. As reducing agent. Smelting ferrosilicon is a complex technology, and there are many things to pay attention to when tapping iron, including tapping time, tapping temperature, etc., which need to be strictly controlled. Once there is a problem in one link, it will directly affect the ferrosilicon during smelting ferrosilicon. Quality, what should you pay attention to when smelting ferrosilicon?
Ferrosilicon manufacturers introduce that in the process of ferrosilicon steelmaking, the iron tapping time is about 10-20 minutes. If the tapping time is too long, it will not only lower the furnace bottom temperature, but also reduce the smelting time. For this reason, the tapping time should be fully utilized and shortened as much as possible. In the early stage of tapping, the two-phase electrodes of the taphole remain stationary, and when tapping, the two-phase electrodes are slowly lowered to promote the molten iron to flow out as quickly as possible. After the taphole is opened, as the molten iron continues to flow outward, the distance between the electrode and the surface of the molten iron in the furnace increases, and the resistance increases. This is conducive to the lowering of the electrode, thereby creating favorable conditions for expanding the crucible and upgrading the furnace temperature. The electrode generates an arc to emit electrons, which has a jet pressure. The lower the electrode goes, the greater the pressure, thereby prompting the molten iron to flow out quickly and shortening the tapping time. As the iron is tapped, the crucible will be slowly emptied, and the electrode must be lowered slowly to prevent material collapse. If the operation is improper and the material collapses during the tapping process, the tapping time will be delayed. As the molten iron gradually flows out, the material surface will drop, and the top of the crucible will gradually press downward. At this time, the electrode will also drop, and the molten iron will flow out quickly, which will help shorten the tapping time.