™ PAM
Polymer Flocculants
Qualfloc™
Bestac
International, Inc.
P.O.
Box 585
Wayne, NJ 07470 USA
Tel: 973 6336878
Fax: 973 6330828
www.qualfloc.com
Email: service@qualfloc.com
[Bestac International, Inc.]
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Copper Processing
The ore is crushed and ground to liberate the copper-bearing mineral
from the waste material or gangue. The reduced product is then subjected to
secondary crushing and following this stage is further crushed by milling which
typically involves a series of rod or ball mills. The final material particle
size will normally be less than 100 microns.
During the final milling stage reagents called collectors are
added to the slurry, which preferentially absorb onto the copper sulfide. These
collectors render the sulfide particles hydrophobic. These copper minerals are
then concentrated by flotation when air bubbles are introduced into the slurry.
Frothers are normally added to the slurry to stabilize the copper particle
laden bubbles at the top of the slurry therefore creating froth. The slurry or
tailings from the flotation cells reports to a thickener where flocculant is
added to promote rapid sedimentation and generation of a clear overflow, which
returns to the process water circuit. The thickened tailings are normally
further dewatered by filtration where a flocculant is added as a filtration
aid.
The copper laden froth (copper concentrate) is removed from the
overflow by mechanical means and is then thickened and dewatered where
flocculants are used to improve the sedimentation and filtration rates. The
resultant concentrate or cake contains approximately 25 to 35% copper, which is
then recovered by pyrometallurgical processing.
Typical applications for flocculants are:
·
Sedimentation of the copper concentrate/ flotation tailings.
Recommended products: Qualfloc A0714, A1418, A2022, A2424, A2526 and A3226.
·
Filtration aid of the thickened tailings/thickened copper
concentrate.
Recommended products: Qualfloc A1414, A2020, A2414, A3016, A3214 and A4014.