company news about Metallic silicon powder production

Metallic silicon powder is produced by reducing high-purity silica (SiO2) with carbon in an electric arc furnace. The process typically involves the following steps:

1. Raw materials: High-purity silica and carbon are used as the primary raw materials for the production of metallic silicon powder. The silica is typically obtained from quartzite, sand, or other natural sources and is purified to remove impurities such as iron and aluminum. The carbon can be derived from a variety of sources, including petroleum coke, charcoal, and coal.

2. Furnace operation: The raw materials are fed into an electric arc furnace, which is a large, refractory-lined container that is capable of withstanding high temperatures. The furnace is heated to temperatures of up to 2,000°C using electrodes that create an electric arc.

3. Reduction reaction: As the furnace heats up, the carbon reacts with the silica to form silicon carbide (SiC) and carbon monoxide (CO). The SiC then reacts with additional silica to form metallic silicon and carbon dioxide (CO2):

SiO2 + 2C → SiC + CO SiC + SiO2 → 2Si + CO2

4. Powder production: The metallic silicon that is produced in the furnace is then collected and processed into a powder form using various techniques such as milling, grinding, and sieving.

5. Quality control: The final product is typically tested to ensure that it meets the required specifications for purity, particle size, and other properties.

Overall, the production of metallic silicon powder is a complex process that requires careful control of temperature, raw materials, and other factors to ensure that the final product is of high quality and meets the desired specifications.