Given that the application of ultrafine grinding technology and equipment involves chemical, metallurgical, building materials, electronics, and light industry industries The wide range of fields such as medicine and agriculture, as well as the diversity of types of crushed materials Especially with the development of contemporary high-tech, there are increasingly high requirements for the deep processing and preparation of materials, such as particle size refinement, uniform particle size distribution or specific particle shape, high quality purification, surface treatment functionalization, etc. All of these factors have led to significant development in ultrafine grinding technology and equipment Although there are various types of ultrafine grinding equipment, their development mainly revolves around the following points:

① In principle, improving the effective crushing energy is mostly achieved by utilizing the combined effects of impact, cutting, friction, and other forces for ultrafine crushing
② Structurally, a combination of ultrafine grinding and grading is adopted, and the use of an airflow grading device can not only improve the particle size, but also achieve uniform or specific particle size distribution
③ The use of high wear-resistant materials as lining materials can not only reduce the pollution caused by lining wear on the composition or color translation of crushed products And it also improves the service life of the equipment
④ The implementation of the integration of ultrafine grinding and near particle surface modification
⑥ Grinding for special needs, such as low overflow grinding
The types and application scope of crushing machinery can be roughly summarized as shown in Figure 4-45 This section will focus on briefly describing the working principles, characteristics, and applications of the following types of ultrafine grinding equipment For reference and selection
High speed mechanical impact micro crusher - vertical and horizontal
Airflow crusher - divided into flat type, circulating tube type, target type, jet type, fluidized bed type
Spray type
Roll mill - high bed roll mill, vertical roll mill (Lai Xie mill, MPS mill)
Medium motion grinder - container driven (ball mill, vibration mill, planetary mill)
Medium stirring mill