Spiral Concentrators

The proven technology sorts different materials according to their density using the centrifugal flow. The lighter particles are thus flushed outward and the heavier particles inward. Our spirals are simple to install, are distinguished by their long service life and, as a static system with no moving parts, energy and maintenance costs are reduced to a minimum.

Multotec-designed spiral concentrators are used across the world in coal, gold, iron ore, mineral sands, platinum and chrome processing plants and other minerals.

We manufacture a wide range of spiral sizes and configurations that can be optimised to your application.

The benefits of the Multotec Spiral Concentrator:

  • Beneficiate material between 38 and 2000 um, depending on ore type
  • Available in single, double and triple starts
  • Spirals range between small diameter (+/- 560 mm) and large diameter (+/- 950 mm)
  • 3 to 12 turn spirals as required by your application
  • High separation efficiency reduces the number of stages on a plant, reducing overall footprint
  • Sliding or auxiliary splitters can be used to achieve targeted grades and recoveries
  • Auto Reject Channel® offers excellent removal of unsuitable particles
  • Trough surfaces are sprayed with polyurethane to required thickness to improve the service life of the spirals

Spiral Separators for heavy minerals

Our gravity separators for heavy mineral applications, including iron ore, chrome, mineral sands and other high density minerals, separate particles in the size range 2 to 0.04 mm.

We have a range of spirals, from 3 to 12 turns, with high-, medium- and low-gradient profiles. Our high capacity spirals (the HX series) provide a per-start tonnage rating of 4 to 7.5 tons per hour, depending on the mineral type, and is especially suited for the treatment of low-grade ore, where large tonnages are processed.

Mineral spiral separator components include the spiral trough; sliding or auxiliary splitters; launders; distributor and piping; feed box; product box and stainless steel product splitters; and the discharge chute at the bottom of the modular housing frame. Our spiral separators have a diameter of +/- 950 mm.

Gravity Separators for coal

Our single- and double-stage spiral separators are optimised for coal particles in the size range of 1 to 0.1 mm, providing enhanced coal washing for slurries. Their compact, modular design provides flexibility when building or upgrading your plant.

Double start spirals reduce the requirements of height and floor space in a plant, and reduce capital and operating costs. The MX7 spiral separator is ideal for difficult-to-wash coals, improving the overall efficiency of tougher separation applications.

These gravity concentrators are precisely designed and built from high-quality materials that provide a long service life, lower costs of operation and low maintenance.

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