how to design beneficiation production line iron ore

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how to design beneficiation production line iron ore

magnetic beneficiation line uses the magnetic separator or dryer. Generally, water is usually used to clean minerals during the beneficiation process, but there is a kind of iron ore mining that does not require water. Corre...

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The magnetic separation line consists of feeder, jaw crusher, screen, ball mill, classifier, magnetic separator, concentrator, and dryer. They combine with hoist and conveyor to make up the complete beneficiation production line. This beneficiation production line has the advantages of high efficiency, energy saving, large capacity, and economy. Customers usually process the ore in the beneficiation plant. The following three basic processes are generally included. 1.Preparation.Before the beneficiation, we should crush, screen, grind, and classify the raw ore. The purpose of this process is to separate the useful minerals from the gangue mineral monomers and to dissociate the various useful minerals from each other. Besides, this process creates suitable conditions for the next separation process. However, some beneficiation plants dont wash or select waste ores because of ore properties and the need for sorting. 2.Separation.Fote company uses the methods of gravity, separation, a...

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1.Compact structure. Fote company offers the necessary equipment of the beneficiation process to customers. The advantages of close cooperation between the equipment, high speed material circulation can help customers save plenty of time. 2.A high degree of automation. The mineral processing is highly automated, controlled by a computer, and equipped with a security alarm system. 3.Low failure rate. Each equipment is made of wear resistant materials, and the low failure rate can greatly reduce the production and maintenance costs of the whole production line. 4.Energy saving and environmental. The beneficiation production line is equipped with perfect dust removal equipment. The reasonable layout is beneficial to convey the raw materials. And the sprinkler system can reduce dust during the production. Moreover, noise pollution is small.

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If you have any project about the mining, FTM Machinery can provide you the equipment you want. Besides, we have the complete after sales service system, so you dont be worry about the installment or technical support problems. Welcome to FTM company for a visit or you can consult online for more details. Zhengzhou Fote company allow you to carry your material for a test on the machine before ordering. In addition, you can also come to pour company for a visit.

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Beneficiation of Iron Ore Mineral Processing amp; Metallurgy

Crushing is done in the conventional manner in 2 or 3 stage systems to approximately all minus ¾ inch which is considered good feed for subsequent wet rod and ball mill grinding. The primary rod mill discharge at about minus 10 mesh is treated over wet magnetic cobbers where, on average magnetic taconite ore, about 1/3 of the total tonnage is rejected as a non magnetic tailing requiring no further treatment. The magnetic product removed by the cobbers may go direct to the ball mill or alternately may be pumped through a cyclone classifier. Cyclone underflows usually all plus 100 or 150 mesh, goes to the ball mill for further grinding. The mill discharge passes through a wet magnetic separator for further upgrading and also rejection of additional non magnetic tailing. The ball mill and magnetic cleaner and cyclone all in closed circuit produce an iron enriched magnetic product 85 to 90% minus 325 mesh which is usually the case on finely disseminated taconites.

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The finely ground enriched product from the initial stages of grinding and magnetic separation passes to a hydroclassifier to eliminate the large volume of water in the overflow. Some finely divided silica slime is also eliminated in this circuit. The hydroclassifier underflow is generally subjected to at least 3 stages of magnetic separation for further upgrading and production of additional final non magnetic tailing. Magnetic concentrate at this point will usually contain 63 to 64% iron with 8 to 10% silica. Further silica removal at this point by magnetic separation becomes rather inefficient due to low magnetic separator capacity and their inability to reject middling particles. Magnetic separation on average ores with 25 to 30% iron results in about 1/3 of the total tonnage ending up in final concentrate.

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The ironconcentrate as it comes off the magnetic finishers is well flocculated due to magnetic action and usually contains 50 55% solids. This is ideal dilution for conditioning ahead of flotation. For best results it is necessary to pass the pulp through a demagnetizing coil to disperse the magnetic floes and thus render the pulp more amenable to flotation. Feed to flotation for silica removal is diluted with fresh clean water to 35 to 40% solids. Being able to effectively float the silica and iron silicates at this relatively high solid content makes flotation particularly attractive. For this separation Sub A Flotation Machines of the open or free flow type for rougher flotation are particularly desirable. Intense aeration of the deflocculated and dispersed pulp is necessary for removal of the finely divided silica and iron silicates in the froth product. A 6 cell No. 24 Free Flow Flotation Machine will effectively treat 35 to 40 LTPH of iron concentrates down to the desired li...

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A cationic reagent is usually all that is necessary to effectively activate and float the silica from the iron. Since no prior reagents have come in contact with the thoroughly washed and relatively slime free magnetic iron concentrates, the cationic reagent is fast acting and in some cases no prior conditioning ahead of the flotation cells is necessary. A frother such as Methyl Isobutyl Carbinol or Heptinol is usually necessary to give a good froth condition in the flotation circuit. In some cases a dispersant such as Corn Products gum is also helpful in depressing the iron. Typical requirements may be as follows: Armac 12..0.10 0.15 lbs/ton Gum 9072..1.0 lbs/ton Heptinol0.025 lbs/ton One operation is presently using Aerosurf MG 98 Amine at the rate of .06 lbs/ton and 0.05 lbs/ton of MIBC . Total reagent cost in this case is approximately 5½ cents per ton of flotation product.

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The high grade iron product, low in silica, discharging from the flotation circuit is remagnetized, thickened and filtered in the conventional manner with a disc filter down to 8 to 10% moisture prior to treatment in the pelletizing plant. Both the thickener and filter must be heavy duty units. Generally, in the large tonnage concentrators the thickener underflow at 70 to 72% solids is stored in large Turbine Type Agitators. Tanks up to 50 ft. in diameter x 40 ft. deep with 12 ft. diameter propellers are used to keep the pulp uniform. Such large units require on the order of 100 to 125 HP for thorough mixing the high solids ahead of filtration.

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In addition to effective removal of silica with low water requirements flotation is a low cost separation, power wise and also reagent wise. Maintenance is low since the finely divided magnetic taconite concentrate has proven to be rather non abrasive. Even after a years operation very little wear is noticed on propellers and impellers. A further advantage offered by flotation is the possibility of initially grinding coarser and producing a middling in the flotation section for retreatment. In place of initially grinding 85 to 90% minus 325, the grind if coarsened to 80 85% minus 325 mesh will result in greater initial tonnage treated per mill section. Considerable advantage is to be gained by this approach. Free Flow Sub A Flotation is a solution to the effective removal of silica from magnetic taconite concentrates. Present plants are using this method to advantage and future installations will resort more and more to production of low silica iron concentrate for conversion i...

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