Recovery of Metals

Recovery of Metals via Dense Media Separation

Although there are various methods for the recovery of metals from other material, one very effective method is commonly used across the world, namely Dense Media Separation. Dense Media Separation, also referred to as Heavy Medium Separation, is a process that involve a mixture of Ferrosilicon and water. Ferrosilicon is a fine metal powder comprising of Iron (Fe) and Silicon (Si), which is used to form a mixture of a very specific density, to facilitate metal recovery.

The Dense Media Separation process takes place in either a static  (drum) or a dynamic (cyclone) separating unit. Once the suspension reaches the desired density, the metal bearing material is added, to initiate the separation process. The heavier particles will sink to the bottom of the tank, while lighter particles will rise to the top (which is why this process is also known as the sink-float separation process).

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

Ferrosilicon powder from DMS Powders for metal recovery

In order for efficient separation to take place, it is essential to select the right grade of Ferrosilicon (to ensure the best chemical and physical properties), and to use products of high quality. The important characteristic (which are interrelated) to consider when selecting the right grade of Ferrosilicon, include:

  • Density: The concentration of ferrosilicon solids in the medium. 
  • Viscosity: A measure of the medium’s resistance to flow. 
  • Stability: The tendency of the medium solids to settle out. 

DMS Powders is a leading producer of Ferrosilicon in Southern Africa, distributing quality Ferrosilicon products to clients across the world. DMS Powders manufactures the following Ferrosilicon products for diamond and metal recovery processes:

  • Atomised FeSi – Coarse, Fine, Cyclone 60, Cyclone 40 & DMS 70
  • Milled FeSi – 65D, 100D, 150D, 270D and 270F

For more information about Ferrosilicon products from DMS Powders, read more on our website, or speak to a professional consultant  today. Order your Ferrosilicon products from the leading Ferrosilicon manufacturer to ensure that you get quality products at cost-effective prices.


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 the leading producer of Ferrosilicon for metal recovery processes today

If you need to purchase quality Ferrosilicon powder for your metal recovery processes, get the Ferrosilicon your need from DMS Powders. DMS Powders is a reputable name in the Ferrosilicon supply industry, and assist clients across the globe to get the best quality Ferrosilicon for their diamond and metal recovery processes.

Our Ferrosilicon products are packaged to ensure safe transportation, protection from wetness and dampness and easy handling. Contact DMS Powders today to get the Ferrosilicon products you need for your metal recovery process.

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+27 (0)16 360 5200