La description
Spiral chute is applicable to
material separation of size 0.3 - 0.*2 mm, such as of Iron ore,
Ilmenite, Chromite, Pyrite, Zircon and Rutile, Monazite, Tungsten
ore, Tin, Tantalum ore, Niobium mine and other non-ferrous metals,
precious metals and non-metallic minerals, which with proportion
differences.
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Working Principle of Spiral
chute:
In order to have a good separation,
there should be a difference in Specific Gravity’s of at least 1.0.
One main benefit of spiral concentrators is they have no moving
parts. The feed range, in percent solids, to a spiral ranges from
*0% solids up to *0% solids. Depending upon the material
characteristics, a maximum efficiency will usually be reached
somewhere in this range. All that is required are some slurry
pumps, the slurry to be separated and the banks of spirals with a
feed distributor.
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Slurry is pumped to the top of the
spiral (typically *3’ to *5’ from the floor), and it enters a feed
distributor that evenly distributes the feed to each spiral
concentrator. The design and shape of the spiral make it work, when
combined with gravitational acceleration. As the slurry travels the
spiraling path down the spiral, mineral grains settle and start
sorting according to size, density and to a lesser extend shape.
Low density particles are carried with the bulk of the water
towards the outside of the spiral (perimeter), while particles with
the greatest density migrate towards the inside of the
spiral.
