Cajamarquilla Zinc Refinery Plant: FRP Equipment for Mercury and Sulfur Dioxide Removal process

In January 2015, Votorantim Metais started the construction of a mercury removal plant, as well as a new sulfuric acid plant for removal of sulfur dioxide from the flue gases, for their Cajamarquilla Zinc Refinery operation.

Outotec, a leader in the process solutions for mining industry, was awarded with the engineering, supply, installation and commissioning of both systems, the sulfur dioxide gas removal system and the Peracidox for the removal of Mercury.

By February 2015, Outotec awarded LEPSA with the engineering, manufacture and installation of all FRP and thermoplastic equipment included in the project. As a side note, later in 2018, LEPSA also supplied via Outotec, all FRP equipment for the concentrate roasting plant for Votorantim Metais, which are currently operating.

All equipment were overly complex, among which were,

  • Reactor Cooling Tower, Ø 19.8 ft x 59.9 ft high.
  • 02 Dual laminate FRP/PVDF & PP VENTURI, Ø 8.2 ft x 29.6 ft high.
  • 02 FRP Scrubber, Ø 14.5 ft x 42.8 ft high
  • 02 FRP stacks, made with Novolac Vinyl ester resin, Ø 8.6 ft x 196.10 ft high (manufactured and delivered in 4-off sections at 49.3 ft long each).
  • FRP tanks for Peracidox Dosing y Weak Acid Buffer.
  • FRP flue gas ducting at Ø 4.7 ft to 6.3 ft.
  • Dual laminate piping FRP/PP ranged 1” to 24” diameter, with fire retardant external surface.

Later in the Project, LEPSA was nominated by GyM and COSAPI to perform all FRP and Thermoplastic jointing.

All Works was performed in alignment to the project’s technical specifications and quality controls, which include third-party mechanical properties verification tests (performed by the PUCP’s Materials Lab), thermoplastics welding test as per DVS-1, pressure (positive and vacuum) test; being all part of the commissioning plan.

LEPSA completed the project successfully in terms of quality, safety, and environmental management.

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