Common points of crushing in ore crushers

Crushing and screening production consists of coarse, medium, fine and ultra-fine crushing process is usually called crushing and screening process, or crushing process for short. Various mines have a wide range of crushing process processes, but they usually have these common points:

1. the crushing process is segmented accordingly

2. close coordination between crushing and screening;

3. The overall segmentation is based on the crushing section as the basic unit, which is divided into coarse crushing section, medium crushing section, fine crushing section and ultra-fine crushing section.

According to the different particle sizes and requirements to be achieved in each crushing section, different crushing and screening equipment is usually selected according to the corresponding situation. The ultra-fine crushing section is mainly set up to obtain a finer material product. The difference between the different crushing processes lies in the number of crushing stages, the configuration and role of the equipment and screening systems. The second and third stages are the most common crushing processes.

There are two main types of two-stage crushing processes: open circuit and closed circuit. They are very practical for small underground processing plants with an inlet material size of 200-400 mm and a product material size of 12-30 mm. In some cases the crushing workload of the first stage is relatively small, when the two-stage closed circuit crushing process can be used directly without pre-screening before crushing. The use of two-stage open circuit crushing is mainly common in certain re-election plants or in small-scale processing plants where the crushed material needs to be fed directly to the mill.

The three-stage process is also divided into open circuit and closed circuit. The closed circuit process is more adaptable when the raw ore does not contain high mud content and is therefore widely used as a preparation process for grinding in mining plants of various industries and sizes. The three-stage open circuit crushing process is relatively simple in terms of plant equipment configuration and can save some of the corresponding infrastructure costs. However, due to the coarseness of the finished material, it is often used to process muddy ores with low moisture content due to site constraints, or when the feed size requirements for grinding are less stringent.

In the crushing of certain minerals, the raw ore contains a large amount of muddy water, which makes it difficult to meet such conditions if the normal crushing process is used. In such cases, a crushing process that includes a washing process is often used. Before and after the coarse crushing of the material, the material should be washed and treated with fine mud. The design of the crushing process can be tailored to suit the production process.