Asarco | Hayden + Ray Mines, AZ

Energy Efficiency Survey

Asarco’s Hayden and Ray facilities (each at 35 MW) are actively involved in developing ways to produce energy-intensive copper at a reduced rate. The Hayden facility operates using a concentrator and copper smelter, an oxygen flash furnace, anode casting, oxygen plant, acid plant, and support facilities. The Ray facility operates using an open-pit mine that includes a concentrator, solvent extraction electro-wining operation, and associated support facilities.

In order to achieve a significant amount of reduction in the energy budget, Lincus was brought on board to analyze the sites’ energy-consumption and identify cost savings opportunities that could be achieved at both the ASARCO Hayden and Ray Mine facilities.

Lincus started by conducting a preliminary energy-consumption survey of both sites to uncover the best ways for Asarco to reduce utility bills. The energyconservation measures included:

The Energy Conservation Measures selected for implementation by Lincus' analysis show an annual energy cost savings of more than $4.0 million at both facilities, an 11% reduction in overall energy costs. The implementation cost for all of the recommended measures was estimated at approximately $16.8 million. The result of this study also indicated a payback of 4.0 and 4.2 years respectively.