Spiral Concentrator: High-Efficiency and Energy-Saving Gravity Separation Equipm

The spiral sluice is a highly efficient mineral separation device that utilizes the combined effects of gravity, centrifugal force, and water flow force. It is widely used in metallurgy, coal, and building materials industries. It combines the advantages of spiral concentrators, shaking tables, and other equipment, and is particularly suitable for separating iron ore, ilmenite, chromite, tungsten ore, tin ore, gold ore, as well as non-ferrous metals, rare metals, and non-metallic minerals with specific gravity differences. The processing particle size range is typically 0.02 to 0.3 mm.

Its working principle is based on the difference in motion of mineral particles in the spiral inclined water flow. After the slurry is fed from the top of the spiral sluice, it rotates downwards along the sluice under the action of gravity, simultaneously generating inertial centrifugal force. This process creates a secondary circulation on the cross-section of the spiral sluice: the upper layer of water flow has a high velocity and large centrifugal force, throwing the less dense, lighter mineral particles to the outer edge; the lower layer of water flow has a slow velocity and small centrifugal force, while the denser, heavier mineral particles move to the inner edge under the combined action of gravity and the inward thrust of the water flow. After multiple cycles of circulation, light and heavy minerals are precisely separated, and finally, concentrate and tailings are obtained separately at the end of the tank through a separator.

The main body of the equipment is typically constructed from interconnected spiral blades made of fiberglass, featuring a rational structure, light weight, and corrosion resistance. Its core advantages lie in requiring no external power, resulting in low operating costs, simple operation, large throughput, and stable separation performance. Since China developed the modern spiral sluice in 1977, this equipment has become the mainstream choice for the beneficiation of coastal placer deposits and fine-grained minerals, playing a vital role in energy conservation, emission reduction, and green mine construction.