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There are a number of different methods when it comes to diamond recovery techniques. DMS plants make use of a method called Dense Media Separation, a reliable diamond recovery method that requires the use of powdered Ferrosilicon (an alloy of iron and silicon) for the medium separation to take place.

DMS Powders is a leading supplier of Ferrosilicon products to DMS plants in South Africa and internationally. DMS Powders produces high quality milled and atomised Ferrosilicon products for use in DMS plants. Contact us today for more information and to get a quote for your desired Ferrosilicon Powders.

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

DMS Powders

Application of Ferrosilicon in DMS plants

The process of Dense Media Separation requires the suspension of Ferrosilicon powders in water, which will form a thick fluid near the density of diamonds, which is 3.52 g/cm3. The material bearing the diamonds are then added to the pulp after which the diamond separation starts. The higher density medium will thus separate from lower density material, in order to separate the diamonds from the diamond-bearing material. This is an effective method used in DMS plants across the world, offering a reliable diamond recovery method.

DMS powders produces and supplies Ferrosilicon products for the purpose of Dense Media Separation of Diamonds. We supply two types of Ferrosilicon, namely:

  • Atomized Ferrosilicon: The process of manufacturing Atomized Ferrosilicon requires melting Ferrosilicon with high grade steel in an induction furnace. The fine particles produced are then separated via screens, and classified according to grade. DMS Powders’ Atomized Ferrosilicon products include Coarse, Fine, Cyclone 60, Cyclone 40 and DMS 70.
  • Milled Ferrosilicon: The method to produce Milled Ferrosilicon requires melting steel in an induction furnace, after which the molten alloy is then tapped onto a sand bed until cooled. The ally is then crushed and milled into the desired particle sizes.

DMS Powders is a leading producer of Ferrosilicon powders used in DMS plants, offering clients reliable and effective products at very competitive prices. Our Milled and Atomized Ferrosilicon products are also conveniently packed to ensure easily handling, safe transportation, durable packaging and resistance to water.



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 Ferrosilicon products for use in DMS plants

If you require Ferrosilicon products for use in a DMS plant, contact DMS Powders today. Our team at DMS Powders will assist you to select the correct Ferrosilicon type and grade to ensure a successful Dense Media Separation process. Trust the leading producers of Ferrosilicon products for your DMS plant.

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