A Wyoming, USA-based company finds ways to chop, cut and rebuild aging rope shovels for additional years of service
By Russell A. Carter, Managing Editor
Like death or taxes, decisions on whether to repair or replace crucial production equipment are inevitable in almost any mining operation. The questions that must be answered before that decision can be made range from the macro level (Will current market prices and future prospects justify a purchase?) to the micro (If we tear this machine apart and find hidden problems, where does that leave us?)
Depending on an operation’s location, workforce experience and capabilities, capital equipment and maintenance budgets, and a host of other factors, the risk/reward pendulum may swing clearly toward one alternative or the other. Generally, it’s not that easy. Sometimes the answer lies buried in the metal: If the equipment is so old that spare parts, documentation—or technicians/engineers familiar with the equipment—are no longer available, is it worthwhile to ‘reinvent the wheel’ and attempt a rebuild? Read the rest of this entry »
Mine ramps up mineral production and expands equipment needs
By Rick Zettler
There may not be gold in them thar Southwestern hills, but there is plenty of copper, molybdenum and silver. There are enough mineral reserves in northwestern Arizona for Vancouver, British Columbia-based Mercator Minerals Ltd. to invest hundreds of millions of dollars in its Golden Valley, Arizona Mineral Park mine.
In the early 1960s, the Duval Corporation began production in the predominantly copper mine nestled in between the Black and Hulalapai Mountains. It remained a 12,000 ton-per-day (t/d) mill and concentrate operation until being converted to an SX/EW (solvent extraction/electrowinning) mine in the mid-1990s, where production was eventually capped at 6,000 gallons per minute (gal/min). Read the rest of this entry »