The Deep Processing Technology Of Several Graphite

　　natural graphite and its processing

　　Chinese rich resources, regardless of flake graphite or graphite, God have special favor china.

　　Scales and microcrystalline, metallogenic mechanism, physical and chemical properties are different, corresponding to different applications. For example, making flexible graphite can only use the flake graphite, and the anode for lithium ion battery is graphite.

　　Not processing worthless.

　　At present China graphite resources processing, also only general separation, crushing, purification, grading, deep processing of the proportion is not high. The deep processing of a class is both at home and abroad has developed from natural graphite products, such as flexible graphite, Shi Moru and so on, in the international market share and resources disproportionately; one is the (foreign) fine powder of different purity of unknown uses customer demand processing, which belongs to the preliminary processing, foreign and further processing to obtain high efficiency, then sold quite a few, such as alkaline battery cathode material.

　　Must have the goal of deep processing of it, namely the use of (user), the use of only technical indicators and deep processing technology (technology).

　　Object (use) roughly two categories, one category is the natural graphite as main material products, such as the new development of flexible graphite following and developing lithium ion battery cathode material. Another kind is the graphite additive new material development, mainly for polymer materials.

　　The directions of deep processing technology, is roughly:

　　Purity, usually require high purity graphite, such as battery.

　　Particle size, is often to fine powder, but flexible graphite to large scale. Shape, a single particle shape, low specific surface area (such as lithium ion battery cathode) hope nearly globose, requirements of high specific surface area (such as certain additives) don't want ball.

　　Surface condition, some requirements of graphite processing has certain surface state, such as battery material. Others are only on the surface the users, such as polymer additives, corresponding will have requirements for shape etc.. The graphite as the main raw materials and processing technology, new materials development etc..

　　Here are a few specific purpose discuss deep processing problems.

　　The new development of flexible graphite

　　○ high-grade flexible graphite sealing materials: nuclear (low sulfur, sulfur free, high purity), corrosion, injection of filler (eight five research results). Mainly in the manufacturing technology of expandable graphite was developing some new technology.

　　○ polymer, fiber reinforced flexible graphite sealing materials, new materials, foreground is very good, the domestic has not been reported in mass production. Significantly lower than cost price, flexible graphite. Mainly in the composite and forming technology.

　　Flexible graphite bipolar plates in fuel cell, UCAR ten years of flexible graphite with an annual output of ten fold increase in the amount of more than sealing according to, flexible graphite. Is mainly to solve the strength, conductivity, impervious technology and molding technology.

　　○ flexible graphite heat exchanger, instead of artificial graphite heat exchanger. The main forming technology.

　　In the expanded graphite adsorption material, environmental protection, medicine. Mainly for the molding technology.

　　The new development of processing technology, flexible graphite graphite raw material: improve the large rate; reduce the granularity of new manufacturing technology of expandable graphite.

　　Graphite powder with the battery

　　In alkaline battery cathode materials: domestic battery production is only about 20000000000, most of a battery, alkaline battery ratio of foreign to reach a new level of domestic 40-60%, Mongolia 20%. The graphite instead of carbon black, greatly improve the electrochemical properties, increasing the capacity of a battery, thousands of tons of domestic demand, the tens of thousands of tons of. Improve the purity, powder technology, impurity control technology. Anode materials for lithium ion batteries: domestic production of 10 million, the world only one billion or so, the rapid development of. Cathode material demand at present ~5000 tons, within a few years will be doubled. Using natural graphite instead of MCMB artificial graphite, performance, cost is greatly reduced. Purification technology, micro technology, micro plastic technology, correct processing technology.

　　◇ polymer additive graphite powder

　　Polypropylene structure, heat exchanger, adding graphite quantum number 20-40%, spreading, with an annual output of hundreds of thousands of tons of polypropylene.

　　Conductive plastic, development of new materials, anti-static, anti electromagnetic interference.

　　Graphite powder technology, shaping and surface treatment technology.

　　◇ military use of graphite materials, mainly stealth material, the purity of graphite material and size related technology.