Lead Metal Production at Paroo Station Mine Using …
161
Power and Steam Generation
A power station will be constructed on-site to produce power and steam for the
existing concentrator and hydrometallurgical facility. The maximum power draw is
13.7 MW and steam production will be 5.8 tph. The power station will be fed from the
existing gas pipeline and receival station, located adjacent the existing diesel power
plant. The existing diesel power station will be also be refurbished for emergency
events.
The new station will consist of generating units, connected to heat recovery steam
generating units (HRSG). The station will operate in an N + 1 configuration depending on the load profile. The power station will be provided under a Build, Own,
Operate (BOO) basis.
Estimated Capital Cost
The estimate capital cost (CAPEX) for the project (Concentrator and Hydrometallurgy Plants) is shown in Table 6.
The CAPEX complies with the requirements of AACE Class 3 criteria obtained
with the following methodology and assumptions:
• Budget quotations for the majority of the equipment;
• Engineering MTO’s for earthworks, concrete, steel, platework, piping and electrical and instrumentation for the facility;
• Market rates for fabrication;
• SNC-L labour cost estimate based on current market conditions and rates, and
compared to contractor budget quotation.
SNC-L analyzed the CAPEX in a contingency-workshop for uncertainty of quantities, costs, and the variability introduced during execution. The Monte Carlo simulations were run using the @Risk software. The contingency included is based on
a P 80 probability, and the estimate accuracy is +15/−13%.
Table 6 Project CAPEX
estimate summary
Description
Capital cost (USD)
Direct costs
114,560,102
Indirect costs
33,390,911
Subtotal base costs
147,951,013
Contingency
14,931,924
Subtotal Inc contingency
162,882,937
Owner’s costs
20,833,000
Total (USD)
183,715, 937
161
Power and Steam Generation
A power station will be constructed on-site to produce power and steam for the
existing concentrator and hydrometallurgical facility. The maximum power draw is
13.7 MW and steam production will be 5.8 tph. The power station will be fed from the
existing gas pipeline and receival station, located adjacent the existing diesel power
plant. The existing diesel power station will be also be refurbished for emergency
events.
The new station will consist of generating units, connected to heat recovery steam
generating units (HRSG). The station will operate in an N + 1 configuration depending on the load profile. The power station will be provided under a Build, Own,
Operate (BOO) basis.
Estimated Capital Cost
The estimate capital cost (CAPEX) for the project (Concentrator and Hydrometallurgy Plants) is shown in Table 6.
The CAPEX complies with the requirements of AACE Class 3 criteria obtained
with the following methodology and assumptions:
• Budget quotations for the majority of the equipment;
• Engineering MTO’s for earthworks, concrete, steel, platework, piping and electrical and instrumentation for the facility;
• Market rates for fabrication;
• SNC-L labour cost estimate based on current market conditions and rates, and
compared to contractor budget quotation.
SNC-L analyzed the CAPEX in a contingency-workshop for uncertainty of quantities, costs, and the variability introduced during execution. The Monte Carlo simulations were run using the @Risk software. The contingency included is based on
a P 80 probability, and the estimate accuracy is +15/−13%.
Table 6 Project CAPEX
estimate summary
Description
Capital cost (USD)
Direct costs
114,560,102
Indirect costs
33,390,911
Subtotal base costs
147,951,013
Contingency
14,931,924
Subtotal Inc contingency
162,882,937
Owner’s costs
20,833,000
Total (USD)
183,715, 937