In modern industrial production, grinding aids, as a special chemical additive, play an irreplaceable role in improving grinding efficiency, reducing energy consumption, and improving product quality. Today, Henan Zhengzhou Mining Machinery Co., Ltd. will discuss in depth the different types of grinding aids and their role in the grinding process.
Types of Grinding Aids
01 Classification by chemical composition
Organic grinding aids: Common ones include alcohols, amines, alcoholamines, fatty acids, resins, etc. For example, triethanolamine, ethylene glycol, propylene glycol, etc., their molecules generally contain polar groups such as hydroxyl and amino groups, which can be adsorbed on the surface of material particles.
Inorganic grinding aids: including metal salts, halides, sulfates, etc. Such as calcium chloride, sodium sulfate, ferric chloride, etc. Inorganic grinding aids mainly play a role by changing the physical and chemical properties of the material surface.
Composite grinding aids: organic and inorganic grinding aids are mixed in a certain proportion, combining the advantages of both, and can play a more effective role in different grinding environments and materials.
02 Classification by purpose of use
Improving grinding efficiency type: The main function is to reduce the grinding energy consumption of materials and increase the output of the mill. For example, alcoholamine grinding aids such as triethanolamine can significantly improve the grinding efficiency of materials such as cement.
Improving product quality type: It helps to improve the particle grading, specific surface area, and other properties of the product, making the product quality better. For example, some high molecular polymer grinding aids can make cement particle distribution more reasonable and improve the early strength of cement.
Multifunctional type: It has multiple functions, such as improving grinding efficiency and improving product quality, which is an important direction of the current development of grinding aids.
The role of grinding aids
Reducing surface energy: During the grinding process, new surfaces will be generated, and the surface energy will increase. Grinding aid molecules are adsorbed on the surface of material particles, reducing the surface energy of the particles, preventing the particles from reaggregating, and making the grinding process easier. For example, in cement grinding, triethanolamine can be adsorbed on the surface of cement particles, reducing its surface energy and improving grinding efficiency.
Dispersion effect: Grinding aids can make material particles evenly dispersed between grinding media, avoid agglomeration and accumulation of particles, increase the contact probability between grinding media and materials, and make the grinding effect better. For example, in slag grinding, adding suitable grinding aids can disperse slag particles well and improve grinding efficiency.
Lubrication effect: Grinding aids form a lubricating film between grinding media and material particles, reducing the friction and grinding energy consumption between them, and also helping to improve the impact and grinding effect of grinding media. For example, fatty acid grinding aids can play a good lubricating role in the grinding of ceramic raw materials.
Crystal transformation effect: In the grinding process of certain materials, grinding aids can promote the crystal transformation of materials, making them easier to grind. For example, in limestone grinding, certain grinding aids can cause changes in the crystal structure of the limestone, reduce its hardness, and improve grinding efficiency.
Summary
In conclusion, grinding aids play a vital role in many fields with their unique chemical properties and diverse functions. Whether it is to improve production efficiency or product quality, grinding aids provide strong support. With the advancement of technology, we expect that grinding aids will show greater potential in more fields in the future.