SX/EW
PLANT - SOLD
3TPD (Expandable)
MAJOR
COMPONENTS INCLUDED:
SX
Filters & FRP (3)
Metering Pump w/controller Pump, Nonmetallic FRP
Pump, Self Priming
Hastelloy fittings
Solvent Extraction Cells
Tanks, Poly, 3000-6000G (6)
Tanks, Steel, 1000G
Piping & Valves
Panel Instrumentation
MCC & Switchgear
Field Instrumentation
EW
Anodes
Pre-engineered Buildings
Cathode/Anode Appliances
Cathodes (220)
Bridge Crane, 3T Buss Bar
EW Cells (9)
Fork Lift
Heat Exchanger
MCC/Switchgear
Rectifier
Polypropylene Tanks
PLANT
DESCRIPTION:
The SOLVENT EXTRACTION PLANT has an aqueous flow rate of
55gpm. This single train can process 15% excess flow.
There are (2) extraction settlers per train. The Organic
to aqueous ratios to mixers is 1:1. There are (2) pump
mixers per settler. The mixer retention time is 3 minutes
per stage. The settling rate is 1.0 USGPM per square ft.
The mass velocity is 1.0 cm/sec. The settler is 36”
deep. The organic depth is 16 ½” (nom) and the
freeboard allowance is 8 ½” (nom). The extractant
type is Cognis LIX984 or equivalent, the volume is 30%
Cognis with SG of 0.92. The centipoise is 200 @ 60F. The
Phillips diluent is 70% by volume with a SG of 0.82. The
diluent viscosity centipoises is 1.8 @ 60F and the
diluent flashpoint is 155F-165F. The copper concentration
loaded is 10.8 grams per liter and the stripped organic
is 4.5 grams per liter. The phase continuity in
extraction is aqueous in stage 1 and organic in stage 2.
The plant operates 365 days per year with a copper
transfer efficiency of 95%. The advance electrolyte flow
rate is 43.2 gpm. There is 1 stripping train with (2)
strip settlers per train and (2) scrub settlers per
train. The overall organic to aqueous ratio is 1:1 the
same as the ratio to mixers. There are (2) pump mixers
per settler. The total mixer retention time per stage is
3 minutes. The settling rate is is 1.0 USGPM per square
foot and the mass velocity is 1.0 cm/second. The spent
electrolyte 36.3 gpl of Cu++ , 180 gpl of H2SO4 ans 2.0
max gpl of Fe. The strong electrolyte composition is 48.2
gpl of Cu, 161.4 gpl of H2SO4, 2.0 gpl max of Fe, 100 ppm
max of Cl and 60ppm of Co. The copper transfer from
electrolyte is 12.0 net gpl. The copper transfer from
electrolyte is 12 net grams per liter. The phase
continuity is stripping 1: organic, stripping 2 aqueous,
scrub 1 aqueous and scrub 2 aqueous. The design Cu/Fe
transfer ratio is 300:1
The
ELECTRO-WINNING PLANT produces 1000TPA or 3 TPD (24).
There are (220) Stainless-Steel cathodes with copper
hanger bars. There are (9) polymer concrete commercial
cells in 1 row. The solution advance rate is 43.3GPM,
flow-rate per cell is 28GPM, and the total circulation
rate is 250GPM. The current operating density is 17
amps/ft2. with a maximum of 21 amps/ft2. The current
design efficiency is 85%. There are 39 variable-cycle
cathodes per cell. Each cathode is 34”x34” with
4” spacing. There are (175) 316SS cathodes and (45)
254 SMO cathodes. There are 40 anodes per cell. Each
anode is 32-1/2”x46-3/8” with 3/8” nominal
thickness. The anode construction is: Rolled Sheet, Ca
0.06-0.07, Sn 0.3-0.35, Al 0.005-0.010, and Pb remainder.
The commercial cell growth period is 7 days with a pull
schedule of 5 days per week. There is (1) Thyrister type
step-less rectifier with a max voltage of 24V, with
20A/KA maximum. The multiple leaf, welded bus system is
rated at 650 amp/sq inch. The circuit design of the bus
system is floating ground type with shorting-bar cell
by-pass. There are hand-held gauss meters available for
short detection.
Pictures,
flowsheets, and a detailed equipment list is available
upon request via email at labarr@mclabarr.com. Last updated 08/24/2005.
|
