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.
