Explain the uses of graphite powder in detail

Graphite powder has a soft texture and black-gray color. Under the condition of isolating oxygen, its melting point is above 3000 ℃. It is one of the minerals resistant to high temperatures. At room temperature, the properties of graphite powder are stable and insoluble in water, dilute acid and dilute alkali; When oxygen is sufficient, it reacts with oxygen to generate carbon dioxide, and when oxygen is insufficient, it reacts with oxygen to generate carbon monoxide; Fluorine can react directly with carbon; At high temperature, many metal oxides can be reduced by its reducibility, and metals can be smelted, such as ironmaking.

Graphite, diamond, diamond, and carbon 60 are all elemental elements of carbon, which are an allotrope

There are many kinds of graphite powder, the main types are as follows:

1. Flake graphite powder is a crystalline mineral of carbonaceous elements. Its shape is like a fish scale, and the crystalline framework is a hexagonal layered structure. The distance between each net layer is 340pm, and the distance between carbon atoms in the same network layer is 142pm. It belongs to the hexagonal system with complete layered cleavage. It has good properties of high-temperature resistance, conductivity, heat conduction, lubrication, plasticity, and acid and alkali resistance.

2. The graphite powder with nanomesh size is obtained by graphite powder. Particle size index: D100 < 1000nm, D50 < 400nm, carbon content greater than 99.99%. Nano graphite powder is an ideal solid lubricating material. It forms chemically bonded tough and almost wearable nano graphite on the metal surface. A large amount of nano graphite is suspended in the lubricating oil to reduce resistance and friction and seal self-lubrication. It is widely used in the chemical industry, steel lubrication, aerospace, lubricating oil, and other fields.

3. Earthy graphite powder, also known as microcrystalline graphite, has excellent quality, high fixed carbon content, few harmful impurities, extremely low sulfur and iron content, stable chemical properties, and is not affected by strong acid and alkali. It enjoys a high reputation in the graphite market at home and abroad and is known as “golden sand”.

4. In addition to the above types of high purity graphite powder and graphite powder, they are also divided into high purity graphite powder and graphite powder.

Graphite powder is closely related to our life. Its main uses are as follows:

1. Refractory materials: graphite and its products have the properties of high-temperature resistance and high strength. It is mainly used to manufacture graphite crucibles in the metallurgical industry. Graphite is commonly used as the protective agent of steel ingots and the lining of metallurgical furnaces in steelmaking.

2. Conductive materials: used in the electrical industry to manufacture electrodes, brushes, carbon rods, carbon tubes, graphite gaskets, telephone parts, coating of TV picture tubes, etc.

3. Lubricating material: graphite is often used as a lubricant in the machinery industry. The lubricating oil can not be used under the conditions of high speed, high temperature, and high pressure, while graphite lubricating material can work without lubricating oil at the temperature of 2000 ℃.

4. High-temperature metallurgical materials: graphite has reducibility. At high temperatures, it can be used to reduce many metal oxides and smelt metals, such as iron making.

5. Polishing agent and antirust agent: graphite is also the polishing agent and antirust agent for glass and papermaking in the light industry. It is an indispensable raw material for manufacturing pencils, ink, black paint, ink, artificial diamonds, and diamonds.