Silicon Metal 551 Grade for Secondary Aluminum

 Metallic silicon (also known as industrial silicon or crystalline silicon) is a basic industrial raw material produced by smelting quartz and carbon-based reducing agents in a high-temperature electric furnace. Its main component, silicon, typically accounts for over 98% of the content. It appears grayish-black in color and has a metallic luster. As the "cornerstone" of modern industry, it is widely applied: approximately 60% is used to prepare alloy materials such as aluminum-silicon alloys to enhance performance; 30% is used to produce organic silicon materials such as silicone rubber and silicone oil; and a small but crucial portion is used for manufacturing semiconductor chips and optical fibers. Depending on the content of impurities such as iron, aluminum, and calcium, metallic silicon is divided into different grades such as 553, 441, and 421 to meet various industrial needs.