Removal of Silica and Alumina as Impurities from LowGrade ...
Figure 2. Recovery of iron and its grade increased with increase in magnetic intensity. Evidently, iron recovery improved from 76% to 93% with an increase in magnetic field density from 3000 mT to 10,000 mT. Silica content in the concentrate was reduced to mass% at 10,000 mT as compared to mass% at 3000 mT.