Development of a beneficiation route to upgrade Sishen iron ore jig slimes for iron making

Show simple item record Molebiemang, G.M. 2019-09-04T22:37:56Z 2019-09-04T22:37:56Z 2017-11
dc.identifier.citation n/a en_US
dc.description A dissertation submitted in fulfilment of the requirements for the Magister Technologiae: Engineering: Metallurgical en_US
dc.description.abstract Kumba Iron Ore’s Sishen mine is located in South Africa’s Northern Cape Province and produces about 40 million tons (Mt) of iron ore per annum. The ore body consists mainly of laminated and massive type hematite ore of which 30 Mt is being beneficiated by Dense Medium Separation (DMS), while the remaining 10 Mt is processed by the jig plant that was added as an expansion to the DMS processing route. The jigs at the jig plant are employed to treat coarse, medium and fine Run of Mine Ore (ROM). Due to the presence of finer particles on the screened ROM, hydrocyclones are employed on the secondary screen that feed the finer jig to produce fines on the overflow that is fed to the thickeners for dewatering by sedimentation, and the formation of clear liquid that can be recycled to the Jig plant. However, it was suspected that a substantial amount of the iron gets lost to the hydrocylone overflow with slimes. These slimes consist of very fine particles (about 90%-45μm) which make treatment with gravity concentration methods difficult. Sishen mine attempts to beneficiate the slimes using Pulsating High Gradient Magnetic Separators (PHGMS). However, PHGMS produce a concentrate consisting of 64.0% iron and 5.0% silica which render the slimes not suitable for pelletizing. Normally the slimes are considered as waste and are rejected to the slimes ponds. Rejecting slimes is not only a loss of resources, but it also poses severe long-term environmental problems. Recovery of iron minerals from the tailings produced in a large iron ore operation is of importance as it will result in environmental and economic benefits which indicate the importance of utilising those accumulated fines. en_US
dc.description.sponsorship n/a en_US
dc.language.iso en en_US
dc.publisher n/a en_US
dc.relation.ispartofseries n/a;
dc.subject Kumba Iron en_US
dc.subject.lcsh Iron mine en_US
dc.title Development of a beneficiation route to upgrade Sishen iron ore jig slimes for iron making en_US
dc.title.alternative n/a en_US
dc.type Thesis en_US

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