Influence of Dispersant on Grinding Effect of Sand Mill

In the era of rapid development of new energy and new materials, ultrafine grinding technology has become a key technology for the large-scale production of new materials. As the main equipment of ultrafine grinding, the grinding effect of sand mill is affected by many factors, among which the role of dispersant cannot be ignored.

Types and effects of dispersants

A dispersant is a chemical additive that reduces friction between particles and prevents them from agglomerating. In the ultrafine grinding process of the sand mill, the main function of the dispersant is to improve the grinding efficiency, prevent the agglomeration of particles, and keep the slurry evenly dispersed.

According to the different chemical composition and mechanism of action, dispersants can be divided into inorganic dispersants and organic dispersants. Inorganic dispersants, such as silicates and phosphates, prevent the agglomeration of particles mainly through electrostatic repulsion and steric hindrance effect. Organic dispersants such as fatty acid salts, polymers, etc., have good stability and can better adapt to complex grinding environment.

Influence of dispersant on ultrafine grinding effect of sand mill

1. Influence of type and concentration of dispersant on grinding effect

Different kinds of dispersants have a significant effect on the grinding effect of the sand mill. Inorganic dispersants mainly rely on electrostatic repulsion and steric hindrance effect, and can play a good dispersion effect at low concentration. The organic dispersant needs to reach a certain concentration in order to give full play to its characteristics and stability advantages. When selecting the dispersant, it is necessary to carry out experimental optimization according to the specific grinding material and process requirements.

2. Influence of molecular weight and structure of dispersant on grinding effect

The molecular weight and structure of the dispersant also have an important influence on the ultrafine grinding effect of the sand mill. Dispersant with small molecular weight and simple structure can penetrate into the surface of particles more easily, reduce the surface energy and improve the grinding efficiency. However, dispersants with larger molecular weight and complex structure have better steric hindrance effect and can better prevent particles from agglomerating. Therefore, it is necessary to choose the appropriate molecular weight and structure of the dispersant according to the nature of the grinding material and the grinding requirements.

3. The effect of the action mechanism of dispersant and grinding material on the grinding effect

The action mechanism of dispersant and grinding material is also an important factor affecting the ultrafine grinding effect of sand mill. For some grinding materials with strong polarity or adsorption, it is necessary to choose a dispersant with similar polarity or strong adsorption capacity to obtain a better grinding effect. For some more hydrophobic grinding materials, it is necessary to choose a dispersant with better characteristics to maintain a uniform dispersion of the slurry. Therefore, a thorough understanding of the action mechanism of dispersant and grinding material is helpful to optimize the ultrafine grinding effect of the sand mill.

In the future, with the continuous development of ultrafine grinding technology, the role of dispersants will be more prominent. The selection of suitable dispersion function can improve the grinding efficiency and the comprehensive performance of the material. Therefore, it is of great significance to further study the new high-efficiency dispersant and its action mechanism for improving the ultrafine grinding effect of the sand mill.