The Pinos Altos project is an oxide gold deposit located near the town of Cahuisori in the state of Chihuahua, Mexico. A new bulk sampling plant was required as part of their ongoing exploration program. Halyard in collaboration with Multotec provided a turnkey project that included a design, supply and on-site commissioning solution.
The timeline was very tight and there was a requirement that this mobile plant fit on a road legal trailer. Additionally, this structure also had to withstand high winds of up to 150km/h and operate in a location with high seismic activity.
The schedule critical path ran through the equipment procurement lead times and the fabrication.
Structural stability was also a concern as the potential high winds and seismic loads necessitated a very large base for the plant which was impractical for a mobile plant.
Fixed Price: Design, Supply, Fabricate, Trial Erect and Commissioning at shop prior to shipping.
In order to meet the tight timeline a fast track approach was needed. This means that activities are undertaken in parallel instead of sequentially. The risk with this approach is that all the information is not available for the necessary decisions. Consequently, careful planning and experience are required to mitigate this.
Lead times were a problem for the crushers, so refurbished units were sourced and the vendor instructed to provide warranties to mitigate risk. This cost more but it saved the timeline.
The use of a large base frame was eliminated by the clever combination of using the conveyor structure to support the tower. Conventionally these are designed as separate structures for simplicity. The combination meant that the compound structure was stable enough to avoid the need for a large impractical base below the tower.
Due to the clever design and planning the project team (Multotec/Halyard) delivered this project on time and on budget.
A significant part of this projects’ success was due to the client being a part of the team and clearly communicating impacts of decisions and changes to progress during each phase of the project.