XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 773
Table 7. Summary of design parameters used in economic analysis for IX-EO circuit incorporation
Parameter Unit Case Study 1: Mexico Case Study 2: Abitibi
Process EO integrated in SART IX +EO
Water balance Negative /closed Positive /open
EO Discharge For process reuse To receiving environment
Ion Exchange
Flow m3/hr – 500
IX load duration BV/cycle – 42
Column configuration – Lead/lag
#of IX Trains – 3
Total #IX Columns – 9
IX Column size 10' diameter × 8' height
SCN, Feed mg/L – 425
SCN, Effluent mg/L – 50
Electro-Oxidation
Flow m3/hr 250 115
SCN, Feed mg/L 11,000 1,365
Reduction in SCN across circuit %
tonne/day
12%
8.0
80%
3.0
NaCN production tonne/day 5.4 1.54
Current Efficiency %80% 60%
Current Density A/m2 283 600
Anode surface area required m2 4,000 1,500
Cell Type parallel plate emew
Installed Rectifier Power KVA 3,200 1,200
Electricity cost USD/kWh $0.10 $0.05
Cyanide Cost USD/MT 2,480
Plant Availability %90%
Maintenance Costs USD/year 3% of equipment costs
Installation factors
Vendor /packaged /skidded equipment 1.5
Loose equipment 4.0
Figure 11. EO Results showing thiocyanate oxidation, and cyanide production
Table 7. Summary of design parameters used in economic analysis for IX-EO circuit incorporation
Parameter Unit Case Study 1: Mexico Case Study 2: Abitibi
Process EO integrated in SART IX +EO
Water balance Negative /closed Positive /open
EO Discharge For process reuse To receiving environment
Ion Exchange
Flow m3/hr – 500
IX load duration BV/cycle – 42
Column configuration – Lead/lag
#of IX Trains – 3
Total #IX Columns – 9
IX Column size 10' diameter × 8' height
SCN, Feed mg/L – 425
SCN, Effluent mg/L – 50
Electro-Oxidation
Flow m3/hr 250 115
SCN, Feed mg/L 11,000 1,365
Reduction in SCN across circuit %
tonne/day
12%
8.0
80%
3.0
NaCN production tonne/day 5.4 1.54
Current Efficiency %80% 60%
Current Density A/m2 283 600
Anode surface area required m2 4,000 1,500
Cell Type parallel plate emew
Installed Rectifier Power KVA 3,200 1,200
Electricity cost USD/kWh $0.10 $0.05
Cyanide Cost USD/MT 2,480
Plant Availability %90%
Maintenance Costs USD/year 3% of equipment costs
Installation factors
Vendor /packaged /skidded equipment 1.5
Loose equipment 4.0
Figure 11. EO Results showing thiocyanate oxidation, and cyanide production