What is Ferrosilicon?

What is Ferrosilicon?

Ferrosilicon is an alloy of iron and silicon, usually containing a silicon content of 15 - 90% (weight percentage), depending on usage and application needs. The process of producing Ferrosilicon involves a reduction of silica or sand with coke in the presence of iron. Millscale or scrap irons is generally used in the production process of Ferrosilicon, and Ferrosilicon is usually produced in an electric arc furnace (especially with high silicon content).

DMS Powders is a leading supplier of Ferrosilicon products in Africa, supplying two types of Ferrosilicon to clients across the world. For more information about Ferrosilicon, talk to the leading Ferrosilicon supplier in Africa.

  • Atomised FeSi

    Coarse, Fine, Cyclone 60, Cyclone 40, DMS 70

  • Milled FeSi

    65D, 100D, 150D, 270D, 270F

What is Ferrosilicon form DMS Powders used for?

Ferrosilicon produced by DMS Powders is widely i=used in diamond processing, where diamonds and other minerals are separated from diamond bearing material through an effective method called Dense Media Separation. Dense Media Separation is a process that uses the laws of gravity to separate materials with different densities (such as diamonds and kimberlites). The Ferrosilicon used is a powder like substance, that is applied in a DMS plant. The powdered Ferrosilicon is mixed with water to form a substance that is close to the density of diamonds. Once the correct density is achieved, the diamond-bearing material is submerged into the mixture. A swirling movement allows the liquid to mix with the material added, and will the gravity separation process will begin. Material with lighter density will rise to the surface, while material with a heavier density will sink to the bottom, or sides of the tank. Although further processing is required for diamond retrieval, this has proven to be an effective method for initial diamond separation processing.


Our packaging has been specifically designed for:

  • Ease of handling
  • Safety
  • Product integrity
  • Durability
  • Water resistance
  • 125kg steel drums on pallets

  • 250kg plastic drums on pallets

  • 1mt & 2mt bags loose or on pallets.

Types of Ferrosilicon by DMS Powders

DMS Powders produce two types of Ferrosilicon of ruse in Dense Media Separation of Diamonds, namely Milled and Atomised Ferrosilicon. Atomized Ferrosilicon possesses a spherical shape, where Milled Ferrosilicon is more angularly shaped, with slight differences in the production process. DMS Powders supplies the following Ferrosilicon products:

  • Milled Ferrosilicon is available in: 65D, 100D, 150D, 270D, 270F products.
  • Atomized Ferrosilicon is available in Coarse, Fine, Cyclone 60, Cyclone 40, DMS 70.  

Get quality Ferrosilicon products and excellent service from DMS Powders

DMS Powders is a reputable supplier of Ferrosilicon products, exporting our Ferrosilicon products to clients across the globe. If you require Ferrosilicon products for your diamond processing / dense media separation process, talk to a representative at DMS Powders today. Our professional and knowledgeable team will assist with all the  technical support regarding your selection of Ferrosilicon, to ensure that you get the best products for your process requirements.