HAEMATITE RECOVERY FROM A TAILINGS STREAM

摘要

Laboratory and pilot scale testing were carried out in 1999 on a tailing sample from a North Americaniron ore plant using gravity, magnetic and flotation techniques. The ore contained 16 per cent ironmainly in the fine (–38 μm) size fraction. Two methods of evaluating the separation efficiency wereused; Selectivity Index and Z factor analysis. Tabling and magnetic separation produced poor results,with flotation testing showing some promise, generating concentrates assaying more than 40 percent Fe. High grade concentrates containing more than 67 per cent Fe were generated using theKelsey Centrifugal Jig, and it was recommended that this technique be pursued at a larger scale toverify the results obtained.