JXSC Mineral

Chrome Ore Process

The mainly process of chrome ore processing is gravity separation. Sometimes low intensity magnetic separation or high-intensity magnetic separation will be used to deal with the chrome concentrate for a second processing to improve the grade of the chrome. Also some ores treated by flotation, but the gravity separation is still the main processing way for chrome ores.


About Chrome Ore

Chrome is the most important ore of chromium from which it derives its name. Chromium is an important metal and has a wide range of industrial uses.

Chrome minerals are mainly found in mafic-ultramafic igneous intrusions and are also sometimes found in metamorphic rocks. The Chrome minerals occur in layered formations that can be hundreds of kilometers long and a few meters thick. Chrome is also common in iron meteorites and forms in association with silicates and troilite minerals.

Gravity separation is the main process for chrome processing, sometimes to improve the grade of the chrome, the chrome concentrate will be separated by lo- intensity magnetic separation or high-intensity magnetic separation for second processing. Several ores can use the flotation or flocculation flotation process.

Mineral Processing

Chrome Ore Processing

For chrome processing, there are gravity separation, flotation, magnetic separation, and other methods. We can accord the mineral’s analysis report and test report to decide finally the proper solution.

Chrome gravity separation
The gravity separation and magnetic separation process are the main chrome extraction beneficiation methods, chrome ore gravity mining equipment have a jig separator, shaking table, spiral classifier, centrifugal concentrator, and spiral chute. Sometimes, use a weak magnetic separator or high-intensity magnetic separator to further improve the grade of chromium concentrate and the ratio of chromium iron. Besides, some chrome mines use flotation and flocculation flotation methods.

Chrome magnetic separation
How determine the chrome ore concentrating method and select the right chrome mining equipment is closely related to the physical and chemical properties of chromium ore. Because chromite is weakly magnetic, with the development of high-intensity magnetic separation technology, the technology of purifying chromium ore with high-intensity magnetic separation has been very mature. Moreover, the magnetic separation process has no pollution to the environment, the chrome ore magnetic separation technology has been popularized and applied in the major mineral processing plants.

Usually the chrome ore through gravity separation, and after the screening, the slurry is sent to a flotation cell or magnetic separator. The concentrates are dewatered after flotation.

Rock Chrome Process Plant
Rock chrome beneficiation flowchart

The raw ore should be crushed by a jaw crusher initially. When it gets a reasonable fineness, it is transported into a vibrating screen through a conveyor and feeder.

The screened ores get the next procedure: milling process in the ball mill, then next jigging separation. The milled ore gets into a chrome jig separator for gravity separation.

Chrome ore is processed by crushing–screening–washing–selection or heavy medium separation for block granularity enrichment. Flowsheet of medium separation–jigging–milling–spiral beneficiation–intensity magnetic separation has been adopted widely, and flow sheet of shaking table–ore washing–dry normal magnetic separation–intensity magnetic separation–floatation separation is used to separate sea chrome sand.

Alluvial Chrome Process Plant
Alluvial chrome process flowchart

Alluvial chrome process flow
Feeding -> washing -> sieving -> primary gravity separation -> 2nd stage gravity concentration -> magnetic separation for upgrading.

Chrome ore Feeding: This can be a vibration feeding machine, feeding hopper, belt feeder, wheel loader, or excavator feed directly. Usually will add a grizzly bar on the vibration feeder or hopper to remove big waste stones firstly. It depends on the processing capacity to choose suitable chrome ore mining equipment.

Chrome ore Washing: The chrome ore washing machine is for washing clean the clay and mud in raw material, most popular used are chrome ore washing trommel scrubber and chrome ore washing trommel screen. Chrome ore trommel scrubber washer is for washing chrome ore raw material that with much sticky clay, chromite ore washing trommel screen is for wash chromite ore raw material that without much sticky clay. It depends on raw material conditions to choose suitable chrome ore washing equipment.

Chrome ore Sieving: After washing, then sieve out some bigger waste stones, the under-screen slurry will go to the next separation machine. This sieving process can use a trommel screen or vibration screen or chrome ore high-frequency vibration screen which is widely used in chrome ore mining equipment.

Chrome ore Primary Gravity Separation: It is for primary chrome ore concentration process, jig separator or spiral chute separator are the best choices of chrome ore gravity mining equipment. The concentrated ore discharged from them will send to 2nd stage concentration machine.

2nd Stage Concentration Process: The concentrated ore from the chrome ore jig machine or spiral chute separator will go to the chrome ore shaking table concentration machine for final concentration, which can get high-grade chrome ore concentrate. Shaking table is a good concentration effect mining equipment for chrome ore processing plant.

Chromite Ore Refining: If need a much higher chrome ore grade, can use a high-intensity magnetic separator to upgrade it. The chrome ore magnetic separator is also important chrome ore mining equipment for final upgrading.

Equipment Lists

Other Solutions