CHEMICAL GRADE PLANT 1 (CGP1) FEED SYSTEM PROJECT
The Greenbushes Lithium Operations are located directly south and immediately adjacent to the town of Greenbushes in Western Australia. It has two processing plants, one producing technical-grade (TG) lithium concentrates and one producing chemical-grade (CG) lithium concentrate. Ore containing Li2O is fed into the processing plants which upgrade the lithium mineral, using gravity, heavy media, flotation and magnetic processes, into a range of lithium concentrates for bulk or bagged shipment. The Greenbushes pegmatites belong to the Lithium-Caesium-Tantalum family. Lithium ore (spodumene) at Greenbushes is mined from the fresh, unweathered zones in the pegmatite that are exposed in the open pits.
The Chemical Grade Plant 1 (CGP1) Feed System Project encompasses the engineering design, construction and commissioning of a new CG stockpile reclaim and plant feed system to the existing chemical grade (CG) plant. The works included the procurement, installation and interface of a slewing radial stacker fed from a new contract crushing facility established on-site.
Scope of Work
The engineering, procurement, construction, commissioning and handover of the new CGP1 plant feed system, operating at nameplate 290 tph, including:
- Superior radial telescopic stacker;
- 80m3 surge bin structure complete with 6.6m tall concrete wing walls;
- 1200mm wide surge bin reclaim conveyor(1605-FD200);
- Transfer station with integrated belt take-up system;
- 1200mm wide Plant feed conveyor (1605-CV200).
In addition to managing all construction disciplines on-site from the concrete civil, structural, mechanical and electrical works, plant shutdown and brownfield tie-in works were also completed to an existing substation and transfer tower to connect the new plant feed system into the existing CG plant.
Highlights and Achievements
The CGP1 Feed System Project was awarded in November 2017 with engineering and procurement starting immediately. The conveyors were designed and manufactured in Perth then delivered to site pre-assembled, fully dressed, and ready for final installation upon arrival.
Work was completed amongst an operating plant, in a brownfields environment with detail planning required for plant shutdowns and final tie-ins. All work was completed on schedule and under budget without a single safety incident recorded on the project. It was an extremely fast-track project with site construction and civil works commencing on 8 January 2018, with final project commissioning and handover occurring on 13 April 2018.