lustros commences production of pregnant leaching solution at its copper sulfate plant in chile san diego-- business wire -- lustros, inc. otcqb:lsts announced today that its subsidiary
test work, including column tests of gold ores to simulate heap-leach gold processing, has been completed on each deposit to support heap leach production with leach results utilizing ¼ inch and .
a number of byproducts are recovered from american copper mining. in 2013, american copper mining produced 28,500 metric tons of molybdenum, worth about $700–$800 million, which was 47% of total us production. in 2014, copper mining produced about 15 metric tons of gold, worth $600 million, which represented 7% of us gold production.
heap leach treatment of nickel laterites is primarily applicable to clay-poor oxide-rich ore types where clay contents are low enough to allow percolation of acid through the heap. generally, this route of production is much cheaper - up to half the cost of production - due to the lack of need to heat and pressurise the ore and acid.
such oxide ores are usually leached by sulfuric acid, usually in a heap leaching or dump leaching process to liberate the copper minerals into a solution of sulfuric acid laden with copper sulfate in solution.
thiosulfate leaching has been proven to be effective on ores with high soluble copper values or ores which experience preg-robbing: the absorption by carbonaceous components which preferentially absorbs gold and gold-cyanide complexes. leaching through bulk leach extractable gold, or bleg, is also a process that is used to test an area for gold concentrations where gold may not be immediately visible.