Types of natural graphite
The technological properties and uses of graphite mainly depend on its degree of crystallization. Natural Graphite can be divided into crystalline (flake graphite) and cryptocrystalline (earth-like Graphite), two industrial types according to crystal morphology. Crystalline Graphite: In crystalline (flake) graphite ore, the diameter of the graphite crystal is more significant than 1μm in the form of flake; The ore grade is low, but the selectivity is good. The minerals associated with Graphite are often mica, feldspar, quartz, tremolite, diopside, garnet, and a small amount of pyrite and calcite, and some are also associated with rutile and vanadium, and other valuable components; The ore has a flake, granitic scale or granular, crystalline structure, flake, gneiss or massive structure. Crystalline (flake) Graphite is divided into high-purity, high, medium, and low-carbon Graphite according to the fixed carbon content. High purity graphite (selected carbon content is greater than or equal to 99.9%) is mainly used for flexible graphite sealing materials, nuclear Graphite, Instead of platinum crucible for chemical reagents melting and lubricant base material such as high carbon graphite (fixed carbon content 94.0% ~ 99.9%) mainly used in refractory materials, lubricant base material, brush raw materials, carbon products, battery raw materials, pencil raw materials, filling materials and coatings. Low-carbon Graphite (fixed carbon content 50.0% ~ 80.0%) is mainly used for casting coatings. Carbon graphite (selected carbon content 80% ~ 94%) is primarily used in the crucible, refractory materials, casting materials, casting paint, pencil raw materials, battery raw materials, and dyes; Cryptocrystalline Graphite: cryptocrystalline Graphite, also known as earth-like Graphite or amorphous Graphite, cryptocrystalline graphite ore, the diameter of the graphite crystal is less than 1μm, a collection of microcrystals, in the electron microscope to see the crystal shape; High ore grade, but poor selectivity; The minerals associated with Graphite are quartz, calcite, etc. The ore has a fine scale-cryptocrystalline structure, a massive or earth-like structure. Cryptocrystalline graphite ores are mainly distributed in contact with metamorphic deposits. If you are looking for high quality, high purity and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to email contact mis-asia.