What is crystalline graphite?
Crystalline graphite is also called flake graphite. In crystalline graphite ores, the graphite crystals are larger than 1μm in diameter and are flake shaped; the ore grade is low, but the selectivity is good; the minerals associated with graphite are often mica, feldspar, quartz, tremolite, tremolite, garnet and a small amount of pyrite, calcite, etc. Some are also associated with rutile and vanadium and other useful components; the ore is flake shaped, granular flake or granular varicose structure, flake, lamellar or massive structure.
What are the types of crystalline graphite?
Crystalline (flake) graphite is divided into high-purity graphite, high-carbon graphite, medium-carbon graphite and low-carbon graphite according to the fixed carbon content.
High-purity graphite
High-purity graphite (fixed carbon content greater than or equal to 99.9%) is mainly used for flexible graphite sealing materials, nuclear graphite, instead of platinum crucibles for chemical reagent melting and lubricant base materials;
High carbon graphite
High carbon graphite (fixed carbon content of 94.0% to 99.9%) is mainly used in refractory materials, lubricant base materials, brush materials, electric carbon products, battery materials, pencil materials, fillers and coatings, etc.;
Medium carbon graphite
Medium carbon graphite (fixed carbon content of 80% to 94%) is mainly used in crucibles, refractory materials, casting materials, casting coatings, pencil raw materials, battery raw materials and dyes, etc.;
Low carbon graphite
Low carbon graphite (fixed carbon content of 50.0% to 80.0%) is mainly used for casting coatings.
What are the causes of crystalline graphite?
One of the causes of flake graphite ore is regional metamorphism, that is, the sedimentary rock originally containing a large amount of organic matter undergoes moderate to deep regional metamorphism, so that carbonaceous gasification overflows, and it is cooled and recrystallized under suitable geological conditions to form high-quality flake graphite. Crystal; another origin is contact metasomatism, also known as skarn deposits, mostly born in the contact of plutonic igneous rocks and limestones, where most of the carboniferous rocks have been skarnized.
High quality crystalline graphite manufacturer
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