Australia's iron-ore producers have staggered in the face of weaker prices, rising costs and anxiety over China's slowdown, but the recent sharp drop in the Australian dollar is helping them recover some swagger.

The longest slide for the country's currency since the financial crisis is boosting the bottom lines of large miners, such as BHP Billiton and Rio Tinto, as well as of smaller players, including Atlas Iron Ltd. and Mount Gibson Iron Ltd.. Many are expected to report earnings next month.