Method of selecting crushing hammer

As the first-line crushing equipment in the industrial field, crusher is very important to the whole production line. Its demand is increasing, and there are more and more crusher manufacturers. How should we choose?

Factors to be considered when selecting crusher

In the selection of crusher, the type, hardness, particle size of incoming and outgoing materials, output and construction site shall be fully considered.

1. hardness of materials

Different kinds of materials have different hardness. Generally, the greater the hardness, the higher the crushing difficulty coefficient. For crushing hard or medium hard stones, jaw crusher should be selected as the primary crushing equipment. When crushing medium hard or soft stones, cone crusher, impact crusher or hammer crusher can be directly selected.

2. material specification

If the material size is large, the jaw crusher can be selected as the primary crusher; When the size of the stone is small and it needs to be composed of certain graded stone, the combined crushing and screening equipment shall be selected, such as the combined crushing equipment composed of jaw crusher, cone or impact crusher and hammer crusher.

3. humidity of materials

The moisture content of the material will also affect the selection of the crusher. When the moisture content is too large, the fine-grained material will agglomerate or stick to the coarse-grained material due to the increase of humidity, thus increasing the viscosity of the material, reducing the ore discharge speed and reducing the productivity. When it is serious, it will even cause the blockage of the ore discharge outlet and affect the normal production.

4. developed degree of ore cleavage

The developed degree of ore cleavage directly affects the productivity of the crusher. As the ore is easy to break along the cleavage surface during crushing, the productivity of the crusher for crushing the ore with developed cleavage is much higher than that of the ore with dense crushing structure.

5. particle size of incoming and outgoing materials

The size of incoming and outgoing materials is used to judge the model and crushing level of the required crushing equipment.

If the content of coarse particles (larger than the size of ore discharge port) in the crushed materials is high or the ratio of very large ore feeding to the width of ore feeding port is large, the crushing ratio (the ratio of the particle size of the materials before crushing to the particle size of the materials after crushing) that the crusher needs to achieve is large, so the productivity is reduced.

If the content of crushed material fines (close to or less than the size of ore discharge port) is large, or the ratio of very large ore feeding to the width of ore feeding port is small, the crushing ratio to be achieved is small, so its productivity is correspondingly improved.

If the feed particle size is large and the discharge particle size is small, secondary crushing or multi-stage crushing is often required. If the particle size of the broken material is small, multi-stage crushing is generally not required.

6. output requirements

The output requirement is an important indicator to determine the crushing equipment. The higher the output requirement, the larger the required crushing equipment specification, and the corresponding input and output will increase.

7. construction site

The specific situation of the construction site is a more direct factor affecting the selection of crusher equipment, such as the size of the construction site, the specific location of the crushing equipment, etc.