Ubiquitous microorganisms inhabiting iron ore deposits are useful in iron ore beneficiation . Because the presence of phosphorous in the iron ore promotes bacterial growth , iron oxide particles having higher phosphorous contents were seen to be colonized by different bacterial cells.
These techniques are used in various combinations for the beneficiation of iron ores. For beneficiation of a particular iron ore the emphasis is usually to develop a cost effective flow sheet incorporating necessary crushing, grinding, screening and beneficiating techniques which are necessary for the upgrading of the iron ore. A typical flow sheet for iron ore beneficiation plant is shown in Fig 1.
The following diagram demonstrates some typical flowsheet designs for Iron Ore beneficiation of hard rock and friable ores. Innovative Plant Design Having developed an effective and optimised flowsheet, you need a plant that safely and effectively applies this flowsheet to the ore body to extract high grade iron ore whilst delivering high availability, with low capital and low operational expenditure.
Beneficiation of Iron Ore and the treatment of magnetic iron taconites, stage grinding and wet magnetic separation is standard practice. This also applies to iron ores of the non magnetic type which after a reducing roast are amenable to magnetic separation. All such plants are large tonnage operations treating up to 50,000 tons per day and ultimately requiring grinding as fine as minus 500 mesh for liberation of the iron minerals from the siliceous gangue.