2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 5: Starkey Intl. Symp. / Mineral Processing
| Editors: | Kongoli F, Kumar P, Senchenko A, Klein B, Silva A.C., Sun C, Mingan W |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 270 pages |
| ISBN: | 978-1-987820-44-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Investigations for a beneficiation route for Sishen mine’s iron ore Jig slimes
Gracious Mmathuto Molebiemang1;1VAAL UNIVERSITY OF TECHNOLOGY, Gauteng, South Africa (zuid Afrika);
Type of Paper: Regular
Id Paper: 317
Topic: 5
Abstract:
The beneficiation of the jig slimes waste from the South African Sishen mine was investigated with three techniques to upgrade it to concentrates suitable for iron making. The slimes were first characterized by chemical, particle size and iron deportment analyses. Three beneficiation routes were then explored: reverse flotation of the as-received slimes, pre-concentration by magnetic separation prior to reverse flotation and reverse flotation over the narrower size distribution. The as-received slimes were found to contain 44.0, 20.4 and 8.7% iron, silica and alumina respectively, with iron being more in the finer -25 µm fraction. The reverse flotation of the as-received slimes gave a concentrate assaying 51.2% iron and 17% silica, while the magnetic pre-concentration gave a concentrate with 64% iron and 5% silica, which after reverse flotation gave 66% iron and 2.7% silica. Flotation over narrower size for the -25 µm fraction from the pre-concentrated fraction finally gave a concentrate with 68 % iron and 1.6% silica. Magnetic pre-concentration followed by reverse flotation over narrow size distribution using 75 g/t of lilafloat D817M (collector) and 1000 g/t of corn starch (depressant) will produce pellet grade concentrate from this iron ore slimes resource.
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