What Are the Different Uses of Hematite?

Hematite has a chemical composition of Fe ₂ O ₃ and is a hexagonal oxide mineral. It is homogeneous and polymorphic with equiaxed maghemite (-Fe2O3). Single crystals are often rhombohedral and plate-like. The aggregates have various forms, including flakes, scaly (apparent crystalline), granular, oolitic, kidney-shaped, earthy, and dense blocks. The color is reddish brown, steel gray to iron black, and the stripes are cherry red. Metal to semi-metallic gloss. The Morse hardness is 5.5 to 6.5, and the specific gravity is 4.9 to 5.3.

Large hematite deposits are found and mined on every continent. The Soviet Union replaced the United States as the largest producer in 1961. After the United States, France, Canada, China,

Hematite often contains Ti, Al, Mn, Fe2, Ca, Mg, and a small amount of Ga, Co, which are replaced by the same material. Often

Hematite

China's hematite ore reserves are abundant, and it is one of the main sources of iron ore. For this type of iron ore, the sorting methods currently used in hydrogen production are:

(1) Single strong magnetic separation. Some hematite ore concentrators use a single strong magnetic field magnetic separation method for a 15ram grain size fine ore.

(2) Magnetic separation by firing. That is, the ore is magnetized and roasted, so that the hematite or pseudo-hemite is transformed into magnetite, and then sorted by a weak magnetic separator. In order to further improve the quality of iron concentrates, fine sieving and grinding are often used in production Re-selection (can increase the concentrate grade to more than 65%), regrind reverse flotation (which can improve the concentrate grade to 66%) and other processes to further process the iron concentrate obtained from magnetic separation.

One of the important iron ore minerals. Ti, Ga, Co and other elements can be comprehensively used when it reaches a certain amount. Iron oxide can be used as a mineral pigment.

Medicinal hematite name vermiculite, alias alias vermiculite, vermiculite, iron Zhu, nail head vermiculite, red stone, red vermiculite. Efficacy: Pinggan Qianyang, Zhongzhen Jiangni, cooling blood to stop bleeding.

The Longyan Iron Mine in Xuanhua, Hebei, China, and the Ningxiang Iron Mine in Hunan, both are hematite deposits formed by sedimentation. Hematite is often produced together with magnetite in sedimentary metamorphic and contact metamorphic iron ore.

Hematite is one of the most economically important minerals. There are only a few places where hematite has perfect metallic flash rhombohedral crystals. But more often, the crystals are often flat, and even thin plate-like, and some samples are plate-like clusters to form a rose, called iron roses. All these well-crystallized hematite variants are black, but the streaks, that is, the color of the mineral powder, are all red. The so-called kidney-shaped iron ore is this kind of red. The kidney-shaped iron ore is some radial aggregates with a kidney-like surface. Red is the color of most soil-like hematite without crystalline form. Vermiculite is this red earthy hematite, which was once used as a pigment.

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