Ferrosilicon Specifications and Grades

Ferrosilicon Specifications and Grades – DMS Powders

DMS Powders is a leading manufacturer of Ferrosilicon products based in South Africa, distributing and exporting our Ferrosilicon powders to clients across the globe. If you are in need of a specific grade of Ferrosilicon that possesses certain specifications, talk to a consultant at DMS Powders for assistance.

As a leading producer of Ferrosilicon products, you can expect the best quality products and a professional service when making use of DMS Powders as your Ferrosilicon supplier. Contact us today for more information about our Ferrosilicon specifications and the best grade for your application needs.

Atomised FeSi: Coarse, Fine, Cyclone 60, Cyclone 40, DMS 70
Milled FeSi: 65D, 100D, 150D, 270D, 270F

About Ferrosilicon – specification and grades

Ferrosilicon is a ferroalloy of iron and silicon, containing 15% to 90% silicon (in terms of weight). DMS Powders produces Ferrosilicon with a silicon content of 14% – 16%, specifically for use in Dense Media Separation processes. Ferrosilicon also contains a high proportion of iron silicides, with a melting point of about 1200 °C to 1250 °C, and a boiling point of 2355 °C. Ferrosilicon also contains calcium and aluminium (about 1% to 2%).

The application of Ferrosilicon powders from DMS Powders is mainly in diamond and mineral separation plants, where diamonds are separated from diamond-bearing material via a process called dense / heavy medium separation. This is an efficient method to retrieve diamonds and minerals, as it provides effective mineral separation at a cost-effective price. Other uses include the deoxidising of steel, the production of cast iron and steel and many more.

There are different grades of Ferrosilicon for different application needs. The grade of Ferrosilicon is determined by three properties or behavioural characteristics (which are interrelated), namely Density, Viscosity and Stability. The operating is the deciding factor when it comes to selecting the right medium grade for a specific application. The ideal medium grade would offer a high stability and low viscosity, which is required for effective media separation.


Our packaging has been specifically designed for:

Ease of handling
Product integrity
Water resistance

125kg steel drums on pallets

250kg plastic drums on pallets

1mt & 2mt bags loose or on pallets

Contact DMS Powders for quality Ferrosilicon products

Trust DMS Powders to supply you with the best grade and quality of Ferrosilicon products in Africa for you specific application needs. Talk to a consultant today for more information about our range of Ferrosilicon grades and specifications, and packaging options available. Ferrosilicon products manufactured by DMS Powders include Atomised and Milled Ferrosilicon powders in various grades and specifications:

Atomised Ferrosilicon – Coarse, Fine, Cyclone 60, Cyclone 40, DMS 70.

Milled Ferrosilicon – 65D, 100D, 150D, 270D, 270F.

Our products are conveniently packed for safe transportation and easy handling. Contact us today to get the best Ferrosilicon products for your Heavy Medium Separation process, with the specifications required.

Do you have a question?
Feel free to contact us


+27 (0)16 360 5200