Tiger Resources started heap leach operations for its Stage 2 solvent-extraction and electro-winning (SX/EW) processing plant at Tiger’s 60% owned Kipoi copper project in the Democratic Republic of Congo (DRC).

Heap leach commissioning, they noted, commenced with the irrigation of stacked ores with sulphuric acid on December 19, with pregnant solution established two days later.

The event represents the start of commissioning for the SX/EW and, with more than 90% of recoveries forecast by Q2 2014, according to Tiger, the heap leach will continue to build copper in solution for feed to the solvent extraction section of the plant.