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What is silicon metal?

Release Time: 2024-05-31
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Silicon Metal (Si Metal), also referred to as industrial or crystalline silicon, is a high-purity form of silicon. Despite being a non-metal, it exhibits a metallic sheen. Silicon metal is characterized by its high melting point, excellent heat resistance, high electrical resistivity, and exceptional oxidation resistance. It is primarily utilized as an additive in non-ferrous alloys and serves as a fundamental raw material for numerous high-tech industries.

Silicon Metal

Application Areas of  Silicon Metal

  • Industrial silicon metal powder plays a significant role in the metallurgical casting industry, serving as a non-ferrous alloy additive and a silicon steel alloying agent to enhance the hardenability of steel. It also functions as a reducing agent for certain metals, such as in the creation of new ceramic alloys.
  • In the refractory and powder metallurgy industries, silicon metal is frequently utilized in steelmaking furnaces, kilns, and kiln furniture, where it improves products’ high-temperature resistance, wear resistance, and oxidation resistance.
  • Purified industrial silicon can produce single crystal silicon, essential for high-tech fields like integrated circuits and electronic components.
  • High-purity silicon metal is versatile across various industrial fields. It is used to manufacture silicon compounds, photovoltaic solar cells, and silicon wafers for electronic semiconductors.
  • High-quality silicon metal enhances aluminum properties, including casting ability, hardness, and strength. Adding silicon metal to aluminum alloys results in strong yet lightweight materials.
  • In the automotive industry, silicon metal is increasingly replacing heavier cast iron parts, reducing vehicle weight. Common automotive applications include engine blocks, tires, and wheel hubs, which utilize cast aluminum and silicon materials.

The global demand for silicon metal products is increasing. As a critical raw material at the pinnacle of the silicon-based new material industry, silicon metal is essential for the growth of industries such as aluminum alloys, organic silicon, and photovoltaics. The rapid advancement of global manufacturing has led to a steady increase in demand for silicon metal in downstream markets. This rising demand has fueled the continuous expansion of the silicon metal industry, resulting in increased production capacity and output.

CG Metal is a company dedicated to the research, development, production, and sales of silicon metal, silicon metal powder (also known as industrial silicon powder), and various silicon metal deep-processed products. As a seasoned producer of silicon metal, our key products include silicon metal grades such as 1101, 2202, 2502, 3303, 411, 441, and 551, as well as industrial silicon powder available in particle sizes of 100, 200, and 325 mesh.

Product grades Chemical composition Chemical composition Chemical composition Chemical composition
Impurities(%) Impurities(%) Impurities(%)
Si content(%) Fe Al Ca
1101 99.79 0.1 0.1 0.01
2202 99.58 0.2 0.2 0.02
2502 99.48 0.25 0.25 0.02
3303 99.37 0.3 0.3 0.03
411 99.4 0.4 0.1 0.1
421 99.3 0.4 0.2 0.1
441 99.1 0.4 0.4 0.1
551 98.9 0.5 0.5 0.1
553 98.7 0.5 0.5 0.3

Silicon Metal Production Process

Silicon metal is primarily manufactured through the carbothermic process. In this method, silicon dioxide and reducing agents like charcoal and petroleum coke are placed in a high-temperature electric furnace for smelting. Under intense heat, the silicon dioxide reacts with the reducing agents, resulting in the formation of silicon metal.

  • Material: Silica
  • Reducing Agents: Charcoal, petroleum coke, wood chips, low ash coal, etc.
  • Melting Equipment: High-temperature electric furnace

The silicon metal produced through this process typically has a purity of about 97% to 98%, containing various impurities. This grade of silicon metal is commonly used in the metallurgical industry. However, with advanced refining techniques, CG Metal can produce ultra-high-purity silicon metal products with a purity range of 99.7% to 99.8%, catering to the demands of high-tech industries.

Why Choose YY Metal as Your Silicon Metal Producer?

  1. Extensive Industry Experience YY Metal brings extensive experience to the silicon metal industry. With independent import and export rights, our silicon metal products are shipped to Japan, South Korea, India, the Middle East, and various other regions. Our industrial silicon products have earned ISO9001:2015 quality system certification and SGS international certification, ensuring a standardized management and quality control system that consistently produces high-quality silicon metal.
  2. Competitive Pricing Advantage Located in China, a leading silicon production country, YY Metal benefits from significant resource integration advantages. The region’s abundant power resources and low raw material costs allow us to offer more competitive pricing for our silicon metal products.
  3. Comprehensive Product Range and Customization YY Metal offers a wide range of industrial silicon products in various grades, including different categories and particle sizes of silicon metal powder. We also provide customization options for silicon metal blocks, particles, and powder to meet specific customer requirements.