(Reuters) – Iron ore miner African Minerals Ltd said it expected a surge in output this year as it continued to ramp up production at its flagship Tonkolili mine in Sierra Leone.

The company, which said it remained on track to meet its sustainable output target of 20 million tonnes of ore per year during the second quarter, forecast production of 15 million tonnes to 18 million tonnes at Tonkolili in 2013.

The mine produced 5.1 million tonnes last year.