Heap leaching converts the desired minerals into a chemical compound, which, at the bottom of the leach pile
, drains into perforated pipe and is carried by gravity to the final extraction process, usually via a pregnant solution pond.
2]) allowing them to 'walk' on either the drainage layer or the leach pile
without compacting it.
The decrease in production from Q2 2005 to Q2 2006 is primarily due to the expected decrease in gold ounces remaining on the heap leach pile
as residual leaching at Denton-Rawhide continues.
Production was further affected by the temporary closure of sections of the heap leach pile
as the mine operators began re-contouring the pile, which is expected, when finalized, to result in a short-term improvement in production.
designs must take into account a lack of surface area that can create long hauls if dumps are shallow.
7 million at April 30, 2004, as gold was recovered from the heap leach pile
over the course of the year and the accounting inventory of gold in process in the heap leach pile
was drawn down to nil.
The negative aspect of recycling pregnant solution is an increase in gold inventory in the leach pile
because the entrapped solution is of a higher grade.
Heap leach inventories were reduced to nil during Q2 2005 as gold was recovered from the Denton-Rawhide heap leach pile
over the course of the first six months of fiscal 2005; therefore balance sheet 'inventories' at the end of Q3 2005 are comprised of gold in process inventories only and total $0.
9 million at April 30, 2004, as gold was recovered from the Denton-Rawhide heap leach pile
over the course of the first six months of fiscal 2005.
2]) that allow them to walk on either the drainage layer or the leach pile
, without compacting it.
Additional reserves are believed present in the former heap leach pile
which contains approximately 50,000- 60,000 tons of 0.
Barren solution from the Pampa Larga processing plant, near the Carachugo leach pad, is pumped to the Maqui Maqui leach pile