The company also said that ore from its Cigar Lake mine, in Canada's Saskatchewan, would not be milled until early 2015, instead by the end of the year.
The Toronto-based firm has shown president and CEO Jamie Sokalsky the door two years into the job, and less than three months after a breakdown in merger talks with its largest rival.
The world’s second-largest mining company’s produced 139.5 million metric tons of iron ore in the six months through June, while its shipments rose 20% to 142.4 million tons.