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Classification of Graphite Resources

wallpapers Tech 2021-06-16
Classification of Graphite Resources
Graphite deposits are mainly medium and small, and the deposit types are roughly divided into the following five types: ①Lamellar graphite deposits in crystalline schist; ②Graphite deposits in metamorphic coal seams; ③Graphite deposits in nepheline syenite; ④Silicon Graphite deposits in karite; ⑤ Vein graphite deposits in crystalline schist.
There are three types of natural graphite resources, which are block graphite, flake graphite, and earthy graphite (cryptocrystalline graphite).
(1) Dense crystalline graphite
Dense crystalline graphite is also called massive graphite. Such graphite crystals are clearly visible to the naked eye. The particle diameter is greater than 0.1 mm, the specific surface area is concentrated in the range of 0.1-1m/g, and the crystal arrangement is disorderly and presents a dense block structure. This kind of graphite is characterized by high grade, generally, the carbon content is 60-65%, sometimes 80-98%, but its plasticity and smoothness are not as good as flake graphite.
Lump graphite is the rarest and most valuable graphite mine, mainly found in Sri Lanka.
(2) Flake graphite
Flake graphite is a combination of many single layers of graphite. It exists as a single flake in metamorphic rocks. It has a small reserve and high value. The crystals are scaly. They are metamorphic under high-intensity pressure. The difference between scales and fine scales. The characteristic of this type of graphite ore is that the grade is not high, generally between 2 to 3%, or 10 to 25%. It is one of the best floatable ore in nature, and high-grade graphite concentrate can be obtained through multiple grinding and multiple selections. The floatability, lubricity, and plasticity of this type of graphite are superior to other types of graphite, so it has the greatest industrial value.
Flake graphite is mainly distributed in Australia, Brazil, Canada, China, Germany, and Madagascar. [4] In recent years, a large number of flake graphite resources have also been discovered in Africa, Tanzania, and Mozambique. Some scholars have studied flake graphite ore in Ancuaba, Mozambique, and Chilalo, Tanzania. The results show that the mineral composition of graphite ore in Ancuaba and Chilalo is similar, and they are all high-quality large flake graphite resources.

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