Iron ore being the essential raw-material for iron & steel industry, its mining arguably is the cynosure of all mining activities undertaken by any country.
About 87% magnetite ore deposits occur in Southern Sector, especially in Karnataka. Of these, hematite is considered to be superior because of its high grade. Indian deposits of hematite belong to the Precambrian Iron Ore Series and the ore is within banded iron ore formations occurring as massive, laminated, friable and also in powdery form.
Magnetite ore beneficiation process
Iron ore beneficiation processes and other mineral processing operations with magnetite in the ore require accurate mass flow measurements to properly balance the grinding and separation circuits as well as to determine the true throughput impact of circuit changes. Determination of the mass flow requires an accurate measurement of the volumetric flow rate and the specific gravity of the slurry.
Magnetic separation and flotation
Magnetic separation and flotation are the most widely accepted technologies for upgrading fine iron ore particles, but both processes result in iron concentrates with high amounts of very fine and/or interlocked silica particles. Gravity separation is a common process used in iron industry, but the separation efficiency becomes unacceptable with finely disseminated materials (<45 microns).
Batch flotation studies were carried out to select either direct or reverse flotation technique to optimize reagent combination and to establish the number of stages of operations. Denver D-12 sub-aeration flotation machine was used for the batch flotation studies.
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