Graphite powder is obtained by crushing graphite crysta […]
Graphite powder is obtained by crushing graphite crystals. In actual use, sometimes ultra-fine graphite powder and ultra-fine graphite powder with smaller particle size are needed, and ultra-fine crushing of ordinary particle size graphite powder is necessary. What are the specific ultrafine grinding methods of graphite powder?
1. Dry crushing method is divided into jet crushing and mechanical crushing. The graphite powder is crushed by shear force, impact force and friction force in the high-speed crusher, and graphite fine powder less than 10 microns can be obtained, while the jet crusher The finer-grained graphite powder can be obtained by air flow crushing. The particle size of graphite powder reaches 2 to 3 microns, and the particle size of graphite powder is uniform, the impurities of graphite powder are few, and the purity of graphite powder is high.
2. Wet-type ultra-fine crushing equipment is often used in industry. Vibration mill is a new type of high-efficiency ultra-fine grinding equipment. It has lower power consumption and higher production efficiency. During the ultra-fine grinding process, Wet ultrafine crushing equipment needs to add an appropriate amount of dispersant, which can crush graphite into flakes, which is conducive to the adhesion and lubricity of the coating film, and is suitable for the production of colloidal graphite or lubricating coatings.
In some respects, the smaller the particle size of graphite powder, the better the performance of graphite powder and the wider the use of graphite powder. The ultra-fine crushing of graphite powder has opened up the research and development path of ultra-fine graphite powder and graphite micro-powder, making the application of finer graphite powder in more industrial fields.
Flake graphite is widely used in the field of mold release. The characteristics of flake graphite itself can better play the role and effect of the release agent, and play a huge role in the field of release. So why does flake graphite have a good adaptability as a release agent?
1. The characteristics of flake graphite make it widely used in the field of demoulding.
Flake graphite has special oxidation resistance, self-lubricity and plasticity under high temperature conditions, and also has good electrical conductivity, thermal conductivity and adhesion. In alkaline media, graphite particles are negatively charged, making them evenly suspended and dispersed in the media, with good high temperature adhesion and lubricity, suitable for forging, machinery manufacturing and demolding industries.
Flake graphite has a very fine particle size, a wide range of uses, and many specifications, including 1000 mesh, 2000 mesh, 5000 mesh, 8000 mesh, 10000 mesh, 15000 mesh, etc., with good lubrication, electrical conductivity and anti-corrosion functions, using graphite lubricant It can improve the service life of the mold and reduce the cost of forgings by 30%. It has been widely used in the automobile manufacturing industry, tractor manufacturing industry, engine industry and gear die forging industry, and has achieved good technical and economic effects.
2.The demand for mold release agents makes them particularly dependent on flake graphite.
For the production of flake graphite for mold release agents, two factors need to be considered: on the one hand is the stability of the dispersion system; on the other hand is the requirement of the graphite lubrication performance of the forging process to increase the life of the mold and reduce the deformation force and energy Consumption, easy to demold, improve product quality and increase labor productivity.