Iron Ore Separation Process China

07/07/2014 Industrial Equipment

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Iron Ore Separation Process,Preparation Equipment

The separation of iron ore is iron ore beneficiation process, and according to the types of ore properties, can have a variety of different technological process.The magnetite ore dressing process flow, main ones are weakly magnetic iron ore beneficiation process, the mixed ore (magnet – hematite stone), beneficiation process and vanadium titanium magnetite ore dressing process.Single magnet is given priority to with the fine grained disseminated ore and gangue minerals are mainly quartz and hornblende silicate minerals, such as some contain iron silicate more.

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This kind of iron ore beneficiation production, often with weak magnetic separation method.

Weak Magnetic Iron Ore Separation Process

Fine particle flotation methods commonly used to the fine grain of weakly magnetic iron ore, including two is the flotation and reverse flotation process;But when the ore mineral composition is complicated, with other methods is hard to get good mineral, the magnetization roasting – magnetic separation method is more effective;20 ~ 75 mm shaft furnace reduction roasting;20 mm below the powder ore commonly used magnetic separation, gravity separation, flotation and other methods, or combined process separation;2 ~ 20 mm in the coarse grain and grain of weakly magnetic iron ore mainly use gravity separation and magnetic separation;Coarse grain and larger than 20 mm very coarse ore re-election commonly used heavy media separation or jig dressing;In the fine ore with spiral chute and shaking table, centrifugal separation flow membrane re-election method;Coarse, medium grained ores magnetic separation commonly used dry induction roller type magnetic separation machine;Fine ore commonly used wet type induction medium strong magnetic separator.

Iron Ore Beneficiation Case

Silver bay (Silver bay) mill is located in Minnesota superior lake.The plant put into production in 1955, the annual capacity of 31.5 million t.For low grade of ore in processing of magnetic iron flintlock rock, this is a very hard ore, difficult to broken ground.Ore,

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the main content of magnetite iron ore, the second is hematite, hematite and iron hydroxide, major gangue minerals are quartz, in structure is a kind of fine grained disseminated ores, need to make the iron content fully dissociation of ground to less than 0.1 mm.Ore by four broken open, finely with permanent magnet drum dry magnetic separation machine after primary tail, the rough concentrate to open the way into the rod mill for grinding.For wet grinding magnetic separation.Concentrate the hydrocyclone classification, grit to ball mill, the final grinding particle size of 0.044 mm (90%).Return roughing grinding magnetic separator.Cyclone relief after enrichment to the fine screen, screen products for magnetic separation to select, oversize product returns to the ball mill.Magnetic concentrate by reverse flotation available grade of 68.0% Fe, high quality iron concentrate recovery rate was 70%.

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