Silicon metal lumps are large lumps cast from smelted silicon and then crushed into 10-100mm pieces. This size is the most commonly used specification in steel mills, aluminum alloy plants, and organosilicon plants.

Steelmaking and aluminum alloy smelting: Large blocks are easy to feed, produce no smoke, and won't be sucked away by dust collectors.

Organosilicon production: Buying large blocks and crushing them yourself is cheaper than buying powder directly.

Cost considerations: Large blocks require fewer processing steps and are cheaper than granules or powder of the same grade.

We supply large Silicon metal blocks of all grades, including Silicon 97, Silicon 553, Silicon 441, and Silicon 3303. Choose according to your needs.

Silicon metal

chemical composition

Grade	Si Content	Iron	Aluminum	Calcium	Suitable for
97	≥97%	1.5%	0.5%	0.3%	Economy grade: Deoxidized carbon steel, refractory materials
553	≥98.5%	0.5%	0.5%	0.3%	Entry-level: Ordinary aluminum alloy, ordinary steel
441	≥99.0%	0.4%	0.4%	0.1%	Main-class grade: Organosilicon, high-quality aluminum alloy
3303	≥99.3%	0.3%	0.3%	0.03%	High-purity grade: High-end organosilicon, electrical steel, aerospace aluminum

Characteristics of silicon metal Lumps

High melting point and good heat resistance:

Silicon Metal Lumps have a high melting point and can withstand high temperature environments. This characteristic makes them widely used in many high-temperature industrial processes. Whether in the high-temperature smelting process of the metallurgical industry or in the manufacture of refractory materials that need to withstand high temperatures, their good heat resistance can ensure the stability and performance reliability of the material.

High resistivity:

Silicon Metal Lumps have a high resistivity, and this electrical characteristic makes them have important application value in the electronics industry and other fields. In the manufacture of some electronic components with specific requirements for electrical properties, the high resistivity of metal silicon blocks can meet the needs of circuit design and provide guarantees for the stable operation of electronic products.

Semiconductor properties:

Silicon Metal Lumps have semiconductor properties similar to germanium, lead, and tin, which makes them a key raw material in the semiconductor industry. Semiconductor silicon is a high-purity metal silicon used to make semiconductor devices. It is sold in polycrystalline and single crystal forms. It plays a fundamental role in core electronic fields such as integrated circuits and electronic chips, and is an important pillar of the contemporary information industry.

Chemical stability:

At room temperature, Silicon Metal Lumps are insoluble in acid and only easily soluble in alkali, showing good chemical stability. This property enables silicon metal blocks to maintain the stability of their structure and performance in different chemical environments, making them suitable for a variety of chemical industrial production processes and application scenarios that require resistance to chemical corrosion.

Silicon Metal

Products Description

Industrial silicon can be divided into different grades according to the silicon content and the content of main impurities in it. According to national standards, industrial silicon can be divided into 8 grades, among which Si553, Si441, Si421, Si411, etc. are more common in the market. Si5530 can be written as 553# in daily life. The last four digits of the grade represent the maximum content requirements of the main impurity elements iron, aluminum, and calcium in the product respectively. For example, the "4" in Si4210 represents that the iron content in industrial silicon is less than 0.4%, "2" represents that the aluminum content is less than 0.2%, and "10" represents that the calcium content is less than 0.10%.

The price of 553# is lower than that of 441# and 421#, the latter of which is closer to that of 3303#, and the price of 2202# is higher than that of 3303#. It can be seen that the lower the impurity content of industrial silicon, the higher the price, and the price difference of industrial silicon of different qualities is large. In addition, substandard silicon outside the scope of national standards has appeared on the market, such as 97 silicon and recycled silicon. The silicon content of 97 silicon is about 98%, and its use is similar to Si5530; recycled silicon is about 99%, which can replace Si4410, Si3303 and other specifications. The two only account for 9.35% of the total output of industrial silicon in my country.

Let high-quality metallic silicon become a powerful engine for your industrial upgrade

When you are looking for a stable and reliable silicon metal partner, we invite you with absolute quality confidence and customization strength: from photovoltaic new energy to high-end alloy smelting, from semiconductor basic materials to precision casting, our metallic silicon always injects core competitiveness into your products with high-purity silicon content and impurity control below industry standards (Fe≤0.2%, Al≤0.05%)!

What's more exciting is that all parameters and sizes can be customized on demand! Whether you need Si99.5 photovoltaic-grade silicon material or Si99.99 semiconductor-grade raw material; whether you require 200 mesh, 325 mesh powder, or 10-100mm block specifications to meet smelting needs, our technical team will control with millimeter-level precision and full-process quality control management to create a unique silicon material solution for you!

This is not a standardized batch supply, but a quality commitment tailored to your industrial needs! Choosing us means choosing:

✅ High-purity silica raw materials + low-energy consumption smelting process with dual quality assurance;
✅ Flexible response of the entire chain from parameter design to particle size processing;
✅ 24-hour technical docking + after-sales tracking for a worry-free cooperation experience!

product-346-528 Industrial silicon