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High-purity product: Si2202 is classified as a high-purity industrial silicon due to its stringent limits on key impurities such as iron, aluminum, and calcium. High-end applications: Owing to its high purity and relatively higher price, it is primarily used in fields that demand higher raw material purity, such as the production of electronic-grade polysilicon and certain segments of the silicone production process.

Medium-high purity product: Si3303 is classified as a medium-to-high-purity industrial silicon, with a purity level lower than that of Si2202 mentioned earlier, but higher than the more common Si5530. Main application areas: This grade of industrial silicon has a wide range of uses, with the primary application areas including: Aluminum alloys: Particularly used in the production of primary casting aluminum alloys (such as grade A356.2), serving as an important raw material for preparing aluminum alloys. Polysilicon and silicones: Also used in the production of polysilicon, silicones, and other related products.

Purity positioning: Si4105 has a nominal silicon content of ≥99.45%, classifying it as a high-purity industrial silicon. Compared with the grades mentioned in previous rounds, its purity is higher than that of Si3303 (≥99.37%) and Si5530. Main application areas: According to manufacturer introductions, its primary uses include: Polysilicon and monocrystalline silicon: Used as a basic raw material for the photovoltaic and semiconductor industries. Silicones: Used in the production of silicone oils, silicone rubbers, and other products. Aluminum alloys: Also applied in the manufacturing of aluminum alloys.

Special customized product: Si4202 is classified as a "chemical-grade" industrial silicon. It is not a standard grade specified in the national standard, but rather a special grade produced through negotiation between manufacturers and customers based on specific requirements (primarily concerning limitations on certain trace elements). Main application areas: This type of customized product is primarily used in the production of silicones, where strict impurity control is required, in order to meet the individualized needs of different companies' production processes and end products. If you need a more technical or formal tone (e.g., for a datasheet, report, or business translation), I can adjust it accordingly. Let me know if you'd also like the previous sections on Si4202 (the grade breakdown and core parameters) translated as well.

Si 4205 Purity positioning: Its nominal silicon content is ≥99.35%, which places it in the category of higher-purity specifications, exceeding that of more common grades such as Si5530 available in the market. Downstream applications: This type of grade is primarily used in fields that have relatively high requirements for impurity content, such as the production of polysilicon, monocrystalline silicon, and silicones. It can also be used in the manufacturing of aluminum alloys.

Main application areas: This grade of industrial silicon is primarily used in the production of polysilicon, monocrystalline silicon, and silicones, and can also be used in the manufacturing of aluminum alloys. Product positioning: It is a grade with a purity higher than that of more common grades such as Si5530, and is capable of meeting the stringent requirements of downstream industries for specific impurity content.