Mill Flotation Improvements Value Engineering Study

Founded in 1993, Kinross Gold Corporation is a gold mining company with a diverse portfolio of projects throughout the United States, Brazil, Chile, Ghana, Mauritania, and Russia. Headquartered in Toronto, Canada, Kinross
employs approximately 9,000 people worldwide.

The Round Mountain Mine is an open pit mine located in central Nevada, one of the most prolific mining districts in the world. The location of the proposed Mill Flotation Expansion Project is adjacent to the existing Round Mountain Mill facility approximately 55 miles north of Tonopah, in Hye County, Nevada. The mine and mill are operated by Round Mountain Gold Corporation (RMGC).

RMGC wanted to study the potential for gold recovery in their milling facility through expansion of their flotation circuit. They had initially worked with Samuel Engineering who developed a feasibility study proposing the Mill Flotation Expansion Project. Morrison-Maierle’s Value Engineering Study Scope of Work evaluates the proposed project to ensure
that the project scope has been optimized.

The Value Engineering Study focused on the following key project elements:

• Minimize the proposed pre-engineered metal building (PEMB) footprint
  to house the flotation expansion equipment and remove unnecessary access platforms
• Evaluate the bridge crane proposed in the Feasibility Study compared to roof hatches to accommodate access to the external crane
• Use the revised RMGC single-line diagram to optimize the FS electrical requirements and utilize low voltage gear where possible
• Evaluate alternative flotation process equipment arrangements to use three rougher cells instead of the four cells proposed in the Feasibility Study
• Remove the back-up blower from the design, but leave floor space, piping, and electrical designs intact to allow for a future expansion
• Produce a concrete and structural design to reduce contingency required
• Produce a capital cost estimate for the optimized project

The Value Engineering Study was drafted and transmitted to RMGC for review. Changes implemented during the study saved Round Mountain $5,733,530 compared to the initial design.