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apr 02, 2020 this is based on the differences in magnetic properties of the ore components. If either ore or the gangue is attracted by a magnet then ore can be separated from the impurities with the help of magnetic separation method.. for example: the magnetic impurities such as iron and manganese tungstates present in tin stone the worlds resources are dominated by low-grade ore, though current world production of iron ore is largely by supply from deposits of high-grade ore composed of either rocks of massive hematite or pisolitic goethite. world iron ore production in 2013 was 2.95 billion tonne, with the major producers being china, australia, and brazil.In 2019, kiruna produced 14.t of iron ore products. the production in 2018 and 2017 was and 14.t, respectively. the mine produced 50, of ore feed material a day in june 2020. mining at the site was briefly halted in 2019 after an earthquake of magnitude 4.1, the countrys biggest-ever, occurred in may that year.method of transportation is an iron ore slurry pipeline. 4.1.2 iron ore beneficiation iron ore occurs naturally in a variety of forms, from sand-like iron fines to solid rock masses. crude ore, or ore mined in the natural state, seldom occurs in a pure state and requires some form of beneficiation.