Based on the large-scale application of mineral sizers in the field of coal washing and processing and the development situation of coal deep processing to fine, By mineral sizers different installation structure, tooth shape structure and arrangement of crushing teeth corresponding to different crushing strength, manufacturing difficulty, manufacturing cost, service life, maintenance convenience, processing capacity, bite capacity, feed particle size, discharge particle size, blocking rate, superparticle rate and over-crushing rate and other performance indicators, It shows that scientific and reasonable selection of crushing tooth installation structure, tooth shape structure and layout, the design of strong pertinence, high crushing and screening accuracy, multi-directional and multi-angle to meet various user requirements, maximize the utilization rate of coal, Advanced mineral sizers will greatly improve the reliability of equipment operation, reduce equipment manufacturing costs, operating costs, extend the service life of equipment, and improve economic benefits.
Crushing is an important link in mineral processing industry. mineral sizers have been widely used in mines for their advantages of simple manufacture, easy maintenance, low energy consumption, low cost, high crushing capacity and durability. mineral sizers range from a few tons to thousands of tons per hour, depending on the service requirements of the site. It is usually divided according to the size of the discharge particle size after crushing, which can be basically divided into three categories: coarse crushing crusher, medium crushing crusher and fine crushing crusher.
Mineral sizers with discharge particle size of more than 100mm are called coarse crusher. By focusing on the influence of the tooth installation structure, tooth shape structure and layout on the performance of the whole mineral sizers in the coarse crusher, we strive to develop a targeted, energy-saving and energy-saving mineral sizers through detailed optimization design, which can create win-win situation for users and manufacturers. The most direct influencing factors of various performance indexes of coarse crushing crusher mainly include the installation structure of crushing teeth, the shape structure of crushing teeth and the arrangement of crushing teeth.
The principle of the crusher tooth arrangement is that any space size formed by the two toothed rollers in motion should be given a corresponding control cycle. The crushing tooth arrangement includes radial circumferential direction) and axial arrangement.
3.1 Radial circumference direction) layout and other surfaces are studied. The radial circumference direction) layout of crushing teeth directly determines the particle size of the product. It is found that the crushing size is mainly determined by the number of radial crushing teeth and the front space of the teeth controlled by the elevation Angle, the space between the adjacent teeth and the top arc length of the two teeth. The space size of the tooth front is basically equal to 1.5 times of the discharge particle size requirements; The space size between adjacent teeth is roughly 1.2~1.6 times of the broken particle size. The top arc length of the two teeth is 2.2~2.5 times of the broken particle size. This empirical relationship changes with the change of toughness, hardness and crushing performance of the specific crushing material.
If the crushing material has strong toughness and high hardness, the crushing space is relatively reduced; On the contrary, the crushing space increases accordingly. 3.2 Axial arrangement mineral sizers The realization of various performance indicators is not only affected by the various Spaces formed by the radial arrangement of the crushing teeth, but also by the axial arrangement of the crushing teeth. There are two factors affecting the axial arrangement of crushing teeth: the axial distance between two adjacent rows of teeth and the arrangement of crushing teeth on the shaft. We found that the axial distance between two adjacent rows of teeth is roughly 2/3 to 3/4 times of the broken particle size, and the axial distance of the material with strong toughness and high hardness is taken as a small value. The material with weak toughness and low hardness should be taken as large value.
Our company has studied the installation structure, shape structure and arrangement of crusher teeth in mineral sizers, and compared the completion ratio of various performance indicators under different crushing material composition, operating conditions and particle size distribution requirements. The 2PLF series mineral sizers was designed by conducting targeted research on various aspects of the equipment, such as structural selection, overall design, manufacturing, performance, easy maintenance and spare parts supply and replacement, which can achieve customized, cost saving and energy consumption reduction, and achieve a win-win situation for both manufacturers and users. It has been successfully applied in coal preparation plants of major mining bureaus, and has won unanimous praise from users.