Magnetite is the ore of the oxide mineral magnetite, mostly granular aggregates, streaks of black, semi-metallic luster, opaque, non-dissolving, hardness 5.5-6.5. density 5.16-5.18g/cm3, with strong magnetic properties. Brittle, odourless, tasteless, produced in a relatively reduced environment. Magnetite is widely distributed, there are a variety of causes, contact metamorphism of the formation of iron ore can be China Daye iron ore as an example. Magnetite is also enriched in riverbeds or coastal sands because of its high specific gravity and resistance to weathering.

Magnetite can be classified into four main groups according to its mineral composition: magnetite, hematite, limonite and rhodochrosite, based on various iron-bearing minerals. Because of their chemical composition, crystalline structure and the geological conditions of generation are different, so all kinds of iron ore has different external form and physical properties.

1, magnetite main iron mineral magnetite, the theoretical iron content of 72.4%, with strong magnetism, the crystal is often octahedral, a few rhombic dodecahedron.

2, hematite is anhydrous iron oxide ore, the theoretical iron content of 70%, from the buried and mining volume, it is the main ore of industrial production.

3, limonite is anhydrous oxidised iron ore, the most widely distributed in nature, but not many deposits with a large amount of buried, generally limonite iron content of 37% to 55%.

4, rhodochrosite is a carbonate iron ore, the theoretical iron content of 48.2%, in nature, there is industrial mining value of rhodochrosite than the other three ores are less.

The use of magnetite

1、Industry, magnetite is the main raw material for iron refining, which is its most important role and most widely used.

2, in the electronic industry, high purity magnetite powder is an important material for the modern electronic industry.

Magnetite ore beneficiation production line equipment generally consists of jaw crusher, ball mill, classifier, magnetic separator, flotation machine, thickener and dryer and other major equipment, with the feeder, elevator, conveyor can be composed of a complete beneficiation process. The specific process is that the material is first crushed initially, and then sent to the ball mill, which crushes and grinds the ore. The next process is classification. After classification, the ore mixture is washed and graded. Then the magnetic separation is carried out, after the preliminary separation of the magnetic separator, the mineral particles are sent to the flotation machine, where different drugs are added according to different mineral properties, so that the desired minerals are separated from other substances. After the minerals are separated out, they have to go through the preliminary concentration of the concentrator, and then dried by the dryer to get the dry minerals.

Related equipment

Jaw Crusher

Ball Mill

Clasifier