leach pile

leach pile

[′lēch ‚pīl]
(mining engineering)
Mineralized materials stacked so as to permit wanted minerals to be effectively and selectively dissolved by leaching.
References in periodicals archive ?
Management had previously noted that heap leach operations typically start slowly and progress as more ore is loaded onto the leach pile.
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.
This decline in production quarter over quarter represents the natural slowdown in recovery that occurs in the residual leach phase of a heap leach operation, exacerbated by the temporary closure of sections of the heap leach pile as re-contouring of the pile continued.
At Round Mountain and several other heap leach operations in Nevada, leaching is conducted for several years on the same leach pile, resulting in improved recoveries and more favorable economic metrics.
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.
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.
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.
During Q3 2005, Kennecott initiated re-contouring the portion of the heap leach pile that was not re-contoured in the previous two quarters.
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.
Additional reserves are believed present in the former heap leach pile which contains approximately 50,000- 60,000 tons of 0.
Reclamation activities were completed by the fall of 1995 and consisted of washing contaminants from the leach pile, recontouring the leach piles, waste dumps, ponds and roads, covering them with previously stockpiled top soil, and reseeding with plant species native to the area.
Pintail believes their technology may be used to treat the gold ore in the heap leach piles and recover significant percentages of the remaining gold.