A common form of extracting gold from rock used in Australia and North America is
A)power flushing
B)cyanide heap leaching
C)sulfuric acid leaching
D)hydraulic scouring
E)yellow-cake extraction

Question

Quizplus · Accepted Answer

Cyanide heap leaching involves spraying a weak cyanide solution over an open pile of low-grade ore. The solution percolates through the ore, dissolving the gold, which is then collected through an adsorption process. This method is commonly used as it is relatively inexpensive and can extract gold from low-grade deposits.

A Common Form of Extracting Gold from Rock Used in Australia