The gap between domestic crushing and grinding technology and foreign countries is mainly manifested in the following aspects:

1. Insufficient basic research, for different working conditions, it is impossible to provide a reasonable matching structure and working parameters to adapt to it.
2. The experimental methods are very backward, the basic data is insufficient, and the research on equipment and process parameters is lacking, which cannot provide data for the design.
3. The degree of large-scale is very low. Although large-scale and super-large crushing and grinding equipment can be designed and manufactured, the strength is very weak and there is no group advantage.
4. The reliability and maintainability of the equipment are poor, and the comprehensive technical indicators are low.
5. The degree of automation and mechatronic-hydraulic integration is low.
6. There is a big gap in the performance of wear-resistant materials. For example, the wear of the mill cylinder liner in my country is 0.25kg/t, while that in the United States is 0.05kg/t. The wear of steel balls for mills in my country is 1.5-2.0kg/t, And the United States is 0.85kg/t.

To sum up, the development of the industry should focus on or strengthen the following aspects:

1. Construction of the basic platform Establish a national engineering center, carry out basic theoretical research, establish a basic database, provide basic experimental conditions, and provide software and hardware support for the research and development of crushing and grinding equipment.
2. Improvement of design calculation system Improve the calculation system of equipment performance parameters and working parameters; establish the quantitative relationship between structural parameters and mechanical parameters of equipment; quantify the internal relationship between structural layer parameters and working parameters; clarify the kinematics and dynamics characteristics of the system.
3. To improve the overall level of existing equipment, efforts can be made in the following aspects: (1), reliability and technology of equipment; (2), humanized aspects of equipment operation and maintenance; (3), equipment On-line monitoring and monitoring system; (4) Life extension of vulnerable parts of equipment; (5) Safety and environmental protection of equipment.
4. Strengthen the ability to introduce technology and re-create after digestion and absorption At the same time, it should also extend to both ends, that is, advanced technology promotes the research and development of new equipment.
5. Exploration of new crushing methods such as ion crushing, heating crushing, pretreatment crushing and flexible crushing, etc.