Graphite powder soft, black gray, under the condition of isolation of oxygen, its melting point is above 3000℃, is one of the high temperature resistant minerals. At room temperature, the chemical properties of graphite powder are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvent; React with oxygen at different high temperatures to produce carbon dioxide or carbon monoxide; In halogens only fluorine can react directly with elemental carbon; At high temperatures, it can react with many metals to form metal carbide, which can be smelted at high temperatures. Use of graphite powder
1, as refractory material:
Graphite and its products have the properties of high temperature resistance and high strength. It is mainly used to make graphite crucible in the metallurgical industry. Graphite is commonly used as the protective agent of steel ingot in steelmaking and the lining of metallurgical furnace.
2, as conductive material:
In the electrical industry used for the manufacture of electrodes, brushes, carbon rods, carbon tubes, graphite gaskets, telephone parts, TV picture tube coating.
3, as wear-resistant lubrication material:
Graphite is often used as a lubricant in the machinery industry. Lubricating oil often can not be used under high speed, high temperature and high pressure conditions, and graphite wear-resistant materials can work at 2000℃ without lubricating oil. Many corrosive media conveying equipment, widely used graphite materials made of piston cups, seals and bearings, they do not need to add lubricating oil when running. Graphite milk is also a good lubricant for many metal processing (wire drawing, tube drawing).
4, for casting, foundry, molding and high-temperature metallurgical materials:
Due to the small coefficient of thermal expansion of graphite, and the resistance to rapid cooling and rapid heat change, can be used as a glass casting mold, the use of graphite after the black metal casting size is accurate, smooth surface of high yield, can be used without processing or slightly processed, thus saving a lot of metal.
5, as polishing agent and rust prevention agent:
Graphite is also light industry glass and paper polishing agent and rust inhibitor, is the manufacture of pencils, ink, black paint, ink and artificial diamonds, diamonds indispensable raw material.
Colloidal graphite powder in graphite powder is mainly used for fountain pen, powder metallurgy, lubricating oil, grease, dry battery, conductive coating, lubricating coating, scientific research of the Commission of Science, Technology and Industry for National Defense, scientific research institutions, civil nuclear power, aerospace, strategic power interference, smokescreen shielding, etc. It has become an important raw material of new composite materials in the field of high technology and plays an important role in the national economy.
