Experience indicates that chrome ores are concentrated to best advantage by gravity methods. Since recoveries are generally very poor in the fine sies, the gravity flowsheet must be designed to remove the chrome as soon as liberated by crushing and grinding. For example, if the chrome is not entirely freed until the ore is minus 16 mesh, it is obvious that the plus 16 mesh particles should be removed after stage crushing and grinding to prevent further reduction of the chrome and consequent loss in the fine sies.Get A Quote
The crushing section for this 250 ton per day chrome mill consists of a coarse ore grily, a coarse ore bin with pan feeder to a 1821788243 reduction crusher and a crusher discharge conveyor to a crushed ore bin. On this particular ore, we find that there is no chrome liberated in sies larger than 8221.
Accordingly the crusher discharge opening is 8221 and the minus 8221 material is removed for concentration before further reduction.
The 368243x 88242 Adjustable Stroke Ore Feeder is used to accurately control feed of crushed ore to the grinding section. Before it is fed to the 48217x 88242 Peripheral Discharge Rod Mill, the minus 8221 chrome ore is removed from the grinding circuit by means of a 48217x 128242 Dillon Vibrating Screen. This minus 8221 product is then ready for concentration in the Mineral Jigs.
The Vibrating Screen oversie is ground in the Steel Head Rod Mill. A rod mill with the peripheral discharge feature is preferred for this application because the 82168221rapid-pass design produces a minimum of the undesirable fines. The discharge from the rod mill returns to the Dillon Vibrating Screen by means of a Belt Bucket Elevator, so that a closed circuit grinding arrangement is obtained.
The minus 8221 undersie from the Vibrating Screen is divided to feed two identical, parallel jigging circuits, each consisting of l68243x 248243 Duplex Mineral Jig used for roughing and a I68243x 248243 Duplex Mineral Jig used as a scavenger. Automatic Density Discharge Control Valves on the hutches of the scavenger Mineral Jig provide a controlled, continuous, high-density feed to a l68243x 248243 Duplex Mineral Jig used for final cleaning.
A final, cleaned concentrate is produced by the two cleaner Mineral Jigs and also a middling product which is re-circulated back to the scavenger jigs. This procedure is preferable to the immediate regrinding of the middlings as it avoids the further reduction of relatively pure chrome particles which are bound to be present.
The tailing from the scavenger Mineral Jig is directed to a 308243x 138242 Simplex Cross-Flow Classifier which discards a waste product as a final tailing at minus 65 mesh and the sand product is returned to the rod mill for further grinding. A SRL Sand Pump is used to pump the Mineral Jig Tailings to the Cross-Flow Classifier.
This flowsheet is very effective due to the ability to remove the high grade chrome with very littlegrinding on each pass through the mill. In this way, grinding takes place with a large number of small reductions followed byimmediate removal of the liberated chrome into a high grade concentrate.
In the concentration of certain chrome ores, high grade chrome particles are sometimes liberated at sies larger than 8221, For the concentration of these large sie chrome particles, the Improved Har Type Jig is indicated.
In order to produce directly marketable chrome ore for export and domestic industries, most of the chromite ore beneficiation plants in Sukinda region treat selected rich ores with rejection of huge quantities of low and sub-grade ore 10-38 Cr203.
Chromite is an oxide mineral composed of chromium, iron, and oxygen FeCr2O4. It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or weathering.
Chromite can be challenging to identify. Several properties must be considered to differentiate it from other metallic ores. Hand specimen identification of chromite requires a consideration of color, specific gravity, luster, and a characteristic brown streak. The most important clue to identifying chromite is its association with ultrabasic igneous rocks and metamorphic rocks such as serpentinite.
Chromite is sometimes slightly magnetic. This can cause it to be confused with magnetite. Chromite and ilmenite have very similar properties. Careful observations of hardness, streak, and specific gravity are required to distinguish these minerals in hand specimens.
Magnesium frequently substitutes for iron in chromite. A solid solution series exists between the mineral chromite FeCr2O4 and the isomorphous mineral magnesiochromite MgCr2O4. Intermediate specimens can be rich in iron Fe,MgCr2O4 or magnesium Mg,FeCr2O4. For convenience in communication, these minerals are often referred to collectively as chromite.
Chromite ore beneficiation machines are allocated according to the specific natures of the chrome ore.... Jan 23, 2014 Hematite Iron ore beneficiation process flow chart The hematites mineral processing plant diagram process flow chromite chrome ore 5 Decget price.
Jan 03, 2012nbsp018332About 40 of the Indian chromite ore reserves are suitable for metallurgical purpose due to higher CrFe ratio. The present investigation emphasied on the liberation and beneficiation characteristics of Indian chromite oreto improve the Cr Fe ratio. The off grade chromite sample ofSukinda region, India analysed 40.8 of Cr 2 O 3 gt with CrFe ratio of 1.7 and 5.8 of.
Beneficiation of hematite chromite oreeneficiation process of iron ore hematite dry separation home gt process flow and production line gt beneficiation of hematite iron ore beneficiation of hematite iron ore also known as red hematite ore of its stone formula is fe2o3 which is a weakly magnetic iron minerals magnetite floatability than good.
Small amounts of chromite are found in many types of rock. However, chromite deposits that are large enough for mining are generally found in 1 stratiform deposits large masses of igneous rock such as norite or peridotite that slowly crystallied from subsurface magma 2 podiform deposits serpentines and other metamorphic rocks derived from the alteration of norite and peridotite and, 3 beach sands derived from the weathering of chromite-bearing rocks.
Beneficiation Of Hematite Chromite Ore Minig Beneficiation Of Hematite Chromite Ore. Beneficiation of Low Grade Chromite Ores from Sukinda 20 2- 0- 2 Chromite ore beneficiation plants in Sukinda region treat selected rich ores A-38 Cr203 with a view to producing concentrate of about 50 Cr203 as directly marketable grade for export and domestic.
Hematite separation process. process introduction. the early hematite beneficiation is mainly gravity separation with machines of jigger, centrifugal separator, spiral chute, spiral washer, shaking table can be involved and later floatation separation has been used in the hematite iron ore upgrading with floatation separator and magnetic.
beneficiation of low grade manganese ore 8. Significant research effort has been focused on recovery of chromite values from the plant tailings which need to be focused on mineral conservation, utilisation and environment protection point of view 9. The tailing generated from the Turkish chromite beneficiation plants.
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