Geita gold mine

Geita Gold Mine - Reliable power generation in a remote off-grid location

Tanzania

Wärtsilä 40 MW power plant with a 10-year O&M agreement

When Geita Gold Mine required a highly reliable power generation solution to support its growing operations, Wärtsilä provided a turnkey engineering, procurement and construction (EPC) solution and will take care of ongoing operation and maintenance (O&M). This integrated service ensures an uninterrupted off-grid power supply, eliminating revenue losses from power shortages.

Geita Gold Mine, situated in the Lake Victoria gold fields of north-western Tanzania, is a flagship mine of AngloGold Ashanti, the world’s third-largest gold mining company based on production. To support its growing operations as it transitioned from an open-pit setup to underground mining and avoid revenue losses from production interruption, the mine needed a reliable power source that would remain available around the clock.

When it came to building the new plant, establishing an O&M service package we could count on was integral to the solution’s overall success. Wärtsilä’s ability to provide reliable, cost-efficient power generation therefore makes them an important partner for us. An outage of just a couple of minutes can lead to an hour of lost production – so far, we haven’t suffered a single shutdown. Knowing that Wärtsilä is taking good care of our power needs means we have one less thing to worry about.
Oliver Milambo, Commodity Manager, AngloGold Ashanti
THE CHALLENGE
Reliable power generation in an off-grid location
Minimise production losses caused by power shortages
Minimise cost of inputs
WÄRTSILÄ'S SOLUTION
On-schedule EPC plant delivery along with lifecycle solutions
O&M agreement including immediate repairs in the case of breakdown
4 x Wärtsilä 32TS engine generating sets
BENEFIT
Reliable power source and uninterrupted electrical supply
Cost-effective power plant operations and minimised downtime of the mine, meaning no lost revenue caused by power outages
Fuel efficiency improvement of around 4%, leading to approximately $2 million USD of fuel savings in 2019

Main data

Customer
AngloGold Ashanti
Solution
Wärtsilä 40 MW power plant with a 10-year O&M agreement
Operating mode
Baseload
Gensets
4 x Wärtsilä 32TS
Total output
 40 MW
Fuel
Light fuel oil (LFO)
Delivery
February 2018


For AngloGold Ashanti reliability, a solid track record in the industry and a low unit cost of production were the key criteria for selecting a partner. Having had a positive experience with Wärtsilä’s support services for the power plant at its Siguiri mine in Guinea, the company approached Wärtsilä to install an EPC solution featuring a 40 MW flexible power plant with four 32TS engine generating sets that offer excellent load taking capabilities in isolated power systems. Once the plant became operational, a 10-year agreement for O&M services was put in place to ensure optimal operation for its entire lifecycle. This integration of technology and lifecycle services ensures reliable, always-on power that allows the mine to focus on its core activity.
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