China’s graphite products are divided into flake graphite and micro-spar ink two categories: flake graphite refers to natural crystalline graphite, its shape fish scale, by the crystalline (flake) Graphite ore processing, beneficiation, some purified products; microcrystalline graphite, or amorphous graphite, refers to the dense-shaped aggregates composed of tiny natural graphite crystals, which are processed by the amorphous (earthy) graphite ores, and are produced by beneficiation and purification.
Flake graphite According to fixed carbon content is divided into high-purity graphite, high carbon graphite, medium carbon graphite and low carbon graphite 4 categories, according to product size, fixed carbon content is divided into 212 kinds of brands, high-purity graphite (fixed carbon content is greater than or equal to 99.9%) mainly used in flexible graphite sealing materials, instead of platinum crucible for chemical reagents melting and lubricant base material, etc. high carbon graphite (fixed carbon content 94% ~ 99.9%) is mainly used in refractories, lubricant base material, brush raw materials, carbon products, battery raw materials, Pencil raw materials, fillers and paints, etc. carbon graphite (fixed carbon content 80%~94%) is mainly used in Crucible, refractories, foundry materials, foundry coatings, pencil raw materials, battery materials and dyes.
Low carbon graphite (fixed carbon content is greater than or equal to 50% ~ 80%) is mainly used in foundry coatings. Microcrystalline Graphite is divided into iron requirements and iron-free 2 categories, according to the fixed carbon content of products, the largest size is divided into 60 grades, a variety of brands of graphite products of their appearance requirements must not be visible to the naked eye of wood chips, iron filings, stone particles and other sundries, products are not contaminated with other impurities, its technical requirements see the table below. The content of acid-soluble iron in microcrystalline graphite is not more than 1%, it is mainly used in pencil, battery, electrode, graphite emulsion, proportioning of graphite bearing and raw material of carbon rod of battery, and the iron-free microcrystalline graphite is mainly used in casting materials, refractories, dyes and electrode paste and other raw materials.
