Technical and economic indicators of the screening process is screening efficiency and productivity. The former is the quality index, which is the number of indicators. Among them there is a certain
Relations, but also with many other factors, these factors determine the outcome of screening. Factors affecting the screening process can be roughly divided into three categories:
First, the physical properties of the material to be sieved
Including material particle composition itself, humidity, clay content and particle shape.
When larger material fines content, the screen is large productivity. When larger when the humidity of materials, general screening efficiency will be reduced. But sieve
The larger pore size, moisture on the smaller, so the larger the wet material containing water, in order to improve the screening process, can generally be used to increase the screen
Hole approach, or wet sieving. Material containing a large quantity of mud (mud when greater than 8%) should be used wet sieving, or pre-washing.
Second, the impact of the screen surface properties and structural parameters
Shaker is the particles and the screen surface for vertical movement, so high efficiency, large production capacity. The relative motion of the particles and the screen surface is parallel to the main
Sports bar screens, flat shaker, drum sieve, its screening efficiency and productivity are low.
For some materials, the productivity and screening efficiency depends on the mesh size sieve. Productivity depends on the width of the screen surface, wide screen production
Rate. Screening efficiency depends on the length of the screen surface, the screen surface long high screening efficiency. Generally an aspect ratio of 2.
Effective screen area (ie, mesh area and the entire screen surface area ratio) the greater the productivity per unit area of the screen surface and higher screening efficiency.
Larger mesh size, the productivity of the unit screen surface, the higher the screening efficiency.
Third, the influence of the production conditions
When a large sieve load, low screening efficiency. Peace rate largely depends on the mesh size sieve and overall screening efficiency; mesh more
Large, the lower screening efficiency requirements, then productivity higher. Feeding uniformity of the screening process very meaningful.
