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Desorption electrowinning equipment

Desorption electrolysis system is applied to recover solid gold from carbons in the cyaniding process. It is equipped with liquid-level controlling system, temperature controlling system and automatic controlling system.

Scope of Application : High temperature and high pressure desorption electrolysis system

working principle

Desorption electrowinning equipment including: desorption column, electrolytic cell, electric heater, desorption fluid tank, filter, electric control cabinet, rectifier cabinet, circulating pump, activated carbon regeneration furnace, etc.

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When the desorption system is added with anions which are more easily absorbed by activated carbons, Au(CN)2 is replaced by anion and the gold desorption is achieved. After the carbons loaded with gold are desorbed, pregnant solution is process via ionization. At last, solid gold is attained.


Advantages

  1. High-efficiency: when the grade of loaded carbon reaches      3000g/t, the desorption rate can reach more than 96%, the barren carbon      tenor with this equipment comparing with that of normal desorption      electrowinning equipment will reduce to its one/ fourth.

  2. Rapid: the temperature of desorption electrowinning can reach      as high as 150°C(generally 30-55°C higher than in other kind system),      and the working pressure of system can reach as high as 0.5 Mpa (generally      0.2-0.5 Mpa higher than in other kind system), so the desorption      electrowinning is rapid with 12 hours typically(50%-60 % time shorted).

  3. Low consumption: the same temperature for desorption, no need      of heat-exchanging, working speed is rapid, power consumption is 1/2-1/4      of normal system.


Parameters

Desorption electrowinning equipment
Model
Suitable sizeOperating parameter
Mine scale(t/d)Crudes quality(g/t)
GKJD-200<1502--8Temperature:150±2OC
(Na0H)PH:≥13.5
Desorption pressure tank:0.5(Mpa)
Electrolytic tank pressure:0.45(Mpa)
GKJD-300150-3002--8
GKJD-500300-5002--8
GKJD-700
GKJD-1000500-10002--8
GKJD-1500
GKJD-20001000-20002--20
GKJD-2500
GKJD-3000
GKJD-35002000-30002--20
GKJD-4000
GKJD-5000
GKJD-80003000-50002--20
Electrical heater
Model
Temperature(℃)Working mediumElectro-thermal power(KW)Voltage(V)Weight(kg)Note
JDDR640NH4SCN2x338080Resin electrowinning
JDDR18981%NaOH+2%NaOH6x3380
JDDR24981%NaOH+2%NaOH8x3380147
JDDR36981%NaOH+2%NaOH6x6380
JDDR48981%NaOH+2%NaOH8x6380138
Desorption column
ModelVolume(m3)Pressure(Pa)Temperature(℃ )                                     
Working medium
φ300×20000.14Ordinary95~98NaOH2%+NaOH1%
φ450×20000.4Ordinary95~98
φ500×25000.49Ordinary95~98
φ500×30000.55Ordinary95~98
φ500×37200.7Ordinary95~98
φ518×38800.82Ordinary95~98
φ600×3000(2500)0.85(0.71)Ordinary95~98
φ600×43001.2Ordinary95~98
φ700×30001.08Ordinary95~98
φ700×3800(2800)1.585(1.08)Ordinary95~98
φ800×40002Ordinary95~98
φ900×42003Ordinary95~98
Heat exchanger
ModelSpecificationHeat exchange area(㎡)Pressure(Pa)Weight (kg)
JDRJ0413φ400×13006.250.35325
JDRJ0417φ400×170080.35344
JDRJ0418φ400×180090.35490
JDRJ0618φ600×1800160.35868
JDRJ0830φ800×3000380.351495
Electrolytic cell
ModelEffective volume(m3)Cathode plate numberAnode plate numberHomopolar distance
(mm)
Temperature(℃)Voltage(V)Electric current(A)Note
DJC0.20.291010590~950~60~1000Resin Desorption
DJC0.40.47810590~950~60~1000
DJC0.60.6111210590~950~60~1000
DJC0.80.8151610590~950~60~1000
DJC11202110590~950~60~1000
DJC08380.83824258065±51.5~3300~350
 Storage tank of electrolytic solution
ModelSpecificationFiltration volume(m3)Weight (kg)Note
JDYC650φ400×13000.22126rectangle
JDYC900φ900×9000.57229
JDYC1000φ1000×12000.94252
JDYC1200φ1200×12001.36308
JDYC1350φ1350×14002368
JDYC1500φ1500×15002.65558
JDYC2250φ2250×15005.96951
JDYC22280×1188×8882490
Storage tank of Gold charcoal
ModelSpecificationThickness(mm)Weight (kg)
JDCC600φ600×10505104
JDCC900φ900×18055242
JDCC1000φ1000×20055334
JDCC1200φ1200×23905384

Filter
ModelVolume(m3)Temperature(℃)Pressure(Pa)Weight (kg)
JDG6002135≤0.5349

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