Discussion
State whether the following is true or false.
Only strongly magnetic minerals such as magnetite can be removed magnetically.
Answer: B
Correct answer: False
Magnetic separation covers a wide range of susceptibilities. Strongly magnetic minerals such as magnetite are removed by a simple drum magnet; weakly paramagnetic ones such as hematite, ilmenite, biotite and iron-stained anatase need a high intensity or high gradient machine. Whether a mineral can be separated depends on the equipment as much as on the mineral, which is precisely the point of the previous item.
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