The processing technology of ultrafine graphite has used two different methods: chemical method and mechanical method. The so-called chemical method is to use a strong oxidant to interact with graphite to produce graphite acid, which is then converted into graphite fine powder. The oxidants used include sulfuric acid, potassium permanganate, nitric acid, etc. Chemical methods are generally less used due to their high production costs, small scale, and complex processes. The most commonly used method is mechanical. The mechanical crushing method has low production cost, simple process, and is easy to achieve large-scale production. It has huge advantages in the processing technology of ultra-fine graphite. As a manufacturer of ultrafine graphite processing equipment, Guilin Hongcheng will introduce to you today the processing technology of ultrafine graphite and ultrafine graphite processing equipment.
Regarding the production methods of ultrafine graphite powder, it can be divided into physical crushing method and chemical synthesis method both at home and abroad. The chemical reaction separation method is to use a strong oxidant to react with graphite to break the chemical bonds between its molecules to form graphite acid, and then further process the acid to form graphite fine powder. Currently, strong oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid are commonly used as strong oxidants. Although graphite powder can be produced by chemical methods, it is difficult to carry out large-scale production due to its high production cost and complex process, so only a small amount is prepared in the laboratory. The physical separation method is a method of separating graphite layers under strong lateral physical force due to the layered structure of graphite. There are generally the following methods:
1. Crushing method: divided into dry and wet crushing methods and wet crushing method
2. Gas evaporation method, activated hydrogen molten metal reaction method, sputtering method, vacuum deposition method, addition evaporation method, mixed plasma method.
The most commonly used in industry is the physical crushing method that is low-cost and can carry out large-scale industrial production. It mainly adopts dry and wet methods. Ultrafine particles less than 1 μm generally adopt a wet crushing process; particles less than 10um adopt a dry crushing process. Ultrafine vertical mill is currently the most energy-efficient graphite ultrafine processing equipment and is widely used in ultrafine processing of non-metallic powders. Its main features are large output, narrow particle size distribution, and low product contamination. The disadvantage is that it is difficult to crush graphite powder to the sub-micron level, and the general crushing level stays at 3~7μm.
As a manufacturer of ultrafine graphite processing mill, Guilin Hongcheng's ultrafine vertical mill, ring roller mill and other graphite ultrafine processing equipment have been successfully used in the processing technology of ultrafine graphite. If you have relevant needs, please leave us a message for details.