The processing plant at the mine is currently treating the stockpile of ore and the first concentrate shipments have started arriving at the port warehouse.

The company is expecting to produce 1,000t to 1,500t of nickel and copper in 2012 according to its recently updated production plan.

Lundin Mining president and CEO Paul Conibear said the company has re-started concentrate production slightly ahead of the schedule.

"The operation provides nickel and additional copper production for the Company, and is expected to generate good positive cash flows at current metal prices," Conibear added.

The company will confirm its cost plan, once the full design rates of the plant are achieved.

Canada-based Lundin is also planning to produce 5,000t to 7,000t of nickel and copper in the year 2013 and 6,000t to 7,000 in 2014.