Uses of Ferrosilicon Powder:

1..Adding a certain amount of silicon to steel can significantly improve its strength, hardness, and elasticity. Therefore, ferrosilicon is also used as an alloying agent in the smelting of structural steel, tool steel, spring steel, and silicon steel for transformers. It is also used as an inoculant and spheroidizing agent in the cast iron industry.

2.Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in the iron and promote the precipitation and spheroidization of graphite. Therefore, in the production of ductile iron, ferrosilicon is an important inoculant (helping to precipitate graphite) and spheroidizing agent.

3.Used as a reducing agent in ferroalloy production. Not only does silicon have a strong chemical affinity with oxygen, but high-silicon ferrosilicon also has a very low carbon content. Therefore, high-silicon ferrosilicon (or silicon alloy) is a commonly used reducing agent in the production of low-carbon ferroalloys in the ferroalloy industry.

4.Not only does silicon have a strong chemical affinity with oxygen, but high-silicon ferrosilicon also has a very low carbon content. Therefore, high-silicon ferrosilicon (or silicon alloy) is a commonly used reducing agent in the production of low-carbon ferroalloys in the ferroalloy industry.

5.Other uses: Finely ground or atomized ferrosilicon powder can be used as a suspended phase in the mineral processing industry.

6.In the welding electrode manufacturing industry, it can be used as a coating for welding electrodes. High-silicon ferrosilicon can be used in the chemical industry to manufacture products such as silicones.

Basic properties of ferrosilicon powder

I. Physicochemical Properties and Specifications of Ferrosilicon Powder The core components of ferrosilicon powder are silicon (Si) and iron (Fe), with small amounts of aluminum (Al), calcium (Ca), and manganese (Mn). According to GB/T 2272-2009 standard, the silicon content of common grades FeSi45 ranges from 43% to 47%, and that of FeSi75 ranges from 72% to 75%. Regarding impurities, manganese is less than 0.7%, carbon less than 0.1%, sulfur less than 0.02%, and phosphorus less than 0.04%.

In terms of physical properties, the melting point of 75% ferrosilicon is approximately 1360℃, the density of ferrosilicon powder is approximately 4.75 g/cm³, the loose specific gravity is approximately 2.5 g/cm³, and the flow velocity (Hall flow meter method) is approximately 50 g/41 seconds. Regarding particle size, common specifications on the market include 40 mesh, 50 mesh, 60 mesh, 80 mesh, 100 mesh, and 150 mesh, and custom sizes are also available upon request.

There are three main processes for preparing ferrosilicon powder: remelting, pulverization, and atomization. Atomization, using vacuum water atomization, produces powder with good sphericity, making it more popular in high-end applications such as welding materials. Pulverization requires strict control of material temperature to prevent oxidation of the ferrosilicon alloy during the pulverization process.

Different applications have significantly different particle size requirements. For example, low-silicon ferrosilicon powder (Si content 14%-16%) used in mineral processing for heavy media commonly has particle sizes including 65D, 150D, and 270D. Finer particle sizes result in a larger specific surface area, which in turn affects reactivity and suspension performance-a pair of characteristics that need to be balanced based on the application. Choosing the wrong particle size can either affect the sorting effect or increase unnecessary costs-a common occurrence among our clients.

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