On the morning of June 30th, in Xi’an, Shaanxi Province, near the Zhongguanting Village on Fengchan Road, a land was dumped and the villagers brought metal detectors to search for copper coins. Three or forty people in the area surrounded the side of a square mound with a mound of “treasury treasuresâ€, some of which were dug by tools and some by hand. 
The on-site villagers said: “This area does not know who was dumping a pile of residue soil. It was more than 8:00 this morning. I heard that some people found a lot of coins in the soil.†As the news spreads, the nearby villagers are carrying Guys' rushed treasure hunt. 
The villagers dug out the coins that were cast with “Kaiyuan Tongbaoâ€. Some of them were clearly written and some were rusty. 
After Xi'an cultural relics inspection team arrived at the scene to understand the situation, they said that these “Kaiyuan Tongbao†should be authentic, but not local cultural relics.
The gold exploration network reminds you that according to the law, all cultural relics left in underground, inland water and territorial waters in China are owned by the state, and people wishing to get the cultural relics will be handed over to local public security or cultural relics departments.
Graphite powder soft, dark gray; greasy feeling, can contaminate the paper. Hardness of 1 to 2, along the vertical direction with the increase in the hardness of the hardness can be increased to 3 to 5. Specific gravity of 1.9 to 2.3. In the isolated oxygen conditions, the melting point of more than 3000 ℃, is one of the most resistant minerals. At room temperature, the chemical properties of graphite powder is relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; materials with high temperature conductive properties, do refractory materials, conductive materials, wear-resistant lubricating materials.
Graphite powder is widely used, according to its different use, we can be divided into the following categories of graphite powder
1. Scale graphite powder
Flake Graphite powder is the most widely used, but also processed into other graphite powder of the original material, scaly graphite powder specifications from 32 to -12000 mesh range, scaly graphite powder toughness is good, with good thermal conductivity and corrosion resistance, can be used as refractory Materials, wear-resistant lubricating materials, conductive materials, casting, Fansha, die and high temperature metallurgical materials
2. colloidal graphite powder
Colloidal graphite is formed by the average dispersion of graphite particles below 2u meters in an organic solvent. Colloidal graphite is a viscous suspension of black filaments. Colloidal graphite powder with high quality natural flake graphite performance, in high temperature conditions with special oxidation resistance, self-lubricating and plasticity, at the same time with good conductivity, thermal conductivity and adhesion, mainly used in sealing, metallurgical stripping and other industries
3. Ultrafine graphite powder
Ultrafine graphite powder specifications are generally between 8000 mesh -10000 mesh, mainly used in powder metallurgy release agent, the production of graphite crucible, the battery anode and make conductive materials additives
4, nano-graphite powder
Nano-graphite powder main specifications for the D30 50 100 400 nm, nano-graphite powder process is more complex, low production rate, so relatively high prices, mainly used in anti-corrosion coatings, lubricants additives, grease additives, precision graphite seal And other industries, in addition, nano-graphite powder in scientific research institutions also has a high application value
5, High Purity Graphite powder
Graphite Powder,Nano-Graphite Powder,Graphite Carbon,Carbon Brush For Graphite Powder
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