Silicon carbide (SiC) and ferro silicon (FeSi) are two commonly used materials in steelmaking. Both materials contain silicon and carbon, which are important elements in the steelmaking process. 

Deoxidation is an important step in the steelmaking process. It involves removing oxygen from the molten steel to prevent the formation of defects such as porosity and inclusions. SiC and FeSi are both used as deoxidizers in steelmaking, but they have different effects and results.

SiC is a powerful deoxidizer that can remove large amounts of oxygen from the molten steel. It reacts with oxygen to form carbon monoxide and silicon dioxide, which are then removed from the steel. SiC has a high melting point and is not easily dissolved in molten steel, which means it can remain in the slag and continue to remove oxygen as the steel cools. This makes it an effective deoxidizer for high-quality steels that require low oxygen levels.

FeSi is also a commonly used deoxidizer in steelmaking. It reacts with oxygen to form silicon dioxide and iron oxide, which are then removed from the steel. FeSi dissolves more easily in molten steel. This can result in a faster deoxidation rate, but it also means that FeSi is less effective at removing large amounts of oxygen.

The choice between SiC and FeSi as a deoxidizer depends on the specific requirements of the steel being produced. SiC can produce higher-quality steels with lower oxygen levels. However, it is also more difficult to handle due to its abrasive nature. FeSi is easier to handle, but it is less effective at removing large amounts of oxygen.

In terms of the result of deoxidation, SiC and FeSi can both produce high-quality steels with low oxygen levels. However, SiC has some additional benefits that make it useful in certain applications. For example, SiC can increase the wear resistance and hardness of steel when added in small amounts. It can also be used as a refractory material in the lining of furnaces and ladles, where it can withstand high temperatures and corrosive environments.

In conclusion, SiC and FeSi are both effective deoxidizers in steelmaking, but they have different effects and results. SiC is more effective at removing large amounts of oxygen and can produce higher-quality steels with lower oxygen levels. However, it can be more difficult to handle. FeSi is easier to handle, but it is less effective at removing large amounts of oxygen. The choice between SiC and FeSi depends on the specific requirements of the steel being produced and the desired properties of the final product.