Silicon nitride is an auxiliary material widely used in the steelmaking industry, where it acts as a deoxidizer and impurity absorber. Silicon nitride acts as a deoxidizer and reacts with oxygen to generate nitrogen, which removes oxygen from molten steel and improves the quality of the steel. Moreover, compared with other types of steelmaking deoxidizers, silicon nitride has better deoxidation effect and degassing speed. In addition, as an impurity absorber, silicon nitride can absorb and combine impurities in molten steel, such as sulfur, oxygen, carbon, etc., to separate them from the molten steel, thus improving the purity and strength of the steel.
Although silicon nitride plays a very important role in the steelmaking industry, the prerequisite is the correct application of silicon nitride. So, what is the correct way to use silicon nitride? Silicon nitride manufacturers will explain this issue.
In the steelmaking process, the timing of adding silicon nitride should be grasped. Generally, it is added before the molten steel enters the converter or electric furnace, or during the melting and oxidation process of the molten steel. The amount of silicon nitride added depends on the steel type and smelting requirements. The general amount is 0.1% to 0.3%. Before adding silicon nitride, it must be ground into fine powder and mixed evenly with other fluxes according to a certain proportion. When adding silicon nitride, the adding speed and degree of stirring must be controlled to avoid uneven distribution of silicon nitride in the molten steel.
In the actual steelmaking process, the specific amount and method of adding silicon nitride may be adjusted due to different smelting processes and steel grade requirements. Therefore, in actual operation, reasonable deployment should be carried out according to specific process requirements and steel grade characteristics to achieve the ideal smelting effect.
