Overview

Jerritt Canyon Gold retained Linkan Engineering to design a 1,000 gpm treatment system for tailings reclaim water and stored water volumes that have been concentrated by evaporation and re-use through the mill. The system is comprised of chemical oxidation and pretreatment, a coagulation / flocculation inclined plate settler (IPS), a microfiltration skid, three reverse osmosis skids, and a polishing stage of ion exchange vessels.


A comprehensive series of on-site pilot tests were performed to determine the chemical and polymer requirements, treatment steps, and equipment configuration necessary to treat exceptionally difficult water laden with concentrated dissolved metals from the ore stream. An innovative chemical addition process had to be developed to break down and remove the complexed mercury and thallium in solution.

Included in the design is a master PLC with full local SCADA control, electrical switchgear, chemical storage tank farm with secondary containment, truck unloading driveway, a 14,400 sf process building with office space and a laboratory, necessary access roadways, and influent / effluent pipelines and pump stations. The SCADA system is configured to monitor and communicate with the remote raw water pumping station, a stand-alone underground dewatering system, the Jerritt Canyon Smith Dewatering WTP, and the remote in-line booster station for the Smith plant effluent.

Linkan Construction is building the WTP under a Design-Build contract. Additional services provided include Client assistance with direct procurement of major and minor equipment, and post-design services including liaison with State of Nevada NDEP and BMRR.

Project Highlights
  • 1,000 gpm
  • Removal of As, Sb, Cd, Cl, CN, Mg, Mn, Hg, Tl, SO4, Se, TDS
  • Influent, effluent, concentrate and sludge pipelines
Project Value

$11.1 M capital cost

Project Duration

2016 – 2017

Linkan’s Role
  • Process Development
  • Bench Testing
  • Pilot Testing
  • Detailed Design
  • Design-Build Contractor
Reference:

Mr. George Tinkorang
Jerritt Canton Gold LLC
775.738.5600 ext. 142

Project Features

  • Feed flow rate of 1,000 gpm
  • Variable process controls and equipment to allow a flow range from 350 gpm to 1,000 gpm
  • Chemical addition for oxidation, adsorption and coagulation, precipitation in an IPS followed by UF
  • Seawater RO to remove TDS and trace amounts of fugitive dissolved metals