Ore beneficiation

摘要

A method of enriching the iron content of low grade iron ore bearing materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low grade iron ore bearing materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron bearing materials into a high grade ore stock.

主权项

1. A method of processing low grade iron ore feedstock to produce an iron ore concentrate having a relatively high iron content comprising:
(a) providing a slurry comprising a particulate feedstock comprising magnetic iron ore material, paramagnetic iron ore material and non-iron-bearing gangue material; (b) ultrasonically treating the slurry of (a); (c) magnetically separating the slurry of (b) into a magnetic iron ore fraction and a primary tail fraction containing a paramagnetic iron ore fraction and non-iron-bearing gangue material; (d) ultrasonically treating the separated primary tail fraction; and (e) magnetically separating a paramagnetic iron ore fraction from said primary tail fraction.