The crushing wall and the rolling mortar wall are the main components that work together in the cone crusher and crush the materials. When the cone crusher is in operation, the crushing wall will make a trajectory movement, sometimes approaching and sometimes far away from the rolling mortar wall. The material is crushed by multiple extrusions and impacts from the crushing wall (moving cone) and the rolling mortar wall (fixed cone). , at this time part of the material will be discharged from the open side discharge port. In the cone crushing station, the crushing wall and the rolling mortar wall are the main components that directly contact the material. After being used for a period of time, wear will inevitably occur.
Under normal circumstances, the crushing wall and rolling mortar wall of the cone crusher can theoretically be used for 6 months, but it is understood that some users need to replace them after 2-3 months of use. This is due to the different wear and tear conditions during its service life under the influence of many different factors. During use, when the thickness of the crushing wall and rolling mortar wall of the cone crusher wears to two-thirds, or cracks occur, and the ore discharge port increases to the point that it cannot be adjusted, they need to be replaced.
Factors affecting the service life of the crushing wall and rolling mortar wall
Generally speaking, the factors that affect the crushing effect and service life of the crushing wall and rolling mortar wall are: material stone powder content and material humidity, material hardness and particle size, feeding method, the quality of the crushing wall and rolling mortar wall itself, etc.
Rolling mortar wall
①Stone powder content of crushed materials and humidity of crushed materials
When working in a cone crushing station, if the stone powder content and humidity of the material are relatively high, it will easily adhere to the crushing wall and rolling mortar wall during crushing. Over time, it will not only reduce production efficiency, but also cause damage to the crushing wall and rolling mortar wall. Corrosion occurs on the mortar wall, reducing its service life. For materials with relatively high stone powder content, they should be sieved before crushing, so as to avoid excessive fine powder during crushing; for materials with high humidity, certain measures should be taken to reduce the moisture before crushing. content, such as natural drying or mechanical drying.
②Hardness and particle size of crushed materials
According to the different hardness of the crushed materials in the cone crushing station, the degree of wear of the crushing wall and the rolling mortar wall is also different. The higher the hardness of the material, the more difficult it is to crush, the greater the impact load the crushing wall and the rolling mortar wall will bear during production, and the service life will be shortened accordingly; when the hardness of the material is the same, the larger the particle size of the material entering the crushing cavity, the smaller the lining. The more serious the plate wear, the service life will be relatively shortened.
③Feeding method
The feeding method of the cone crushing station also has a certain impact on the service life of the crushing wall and the rolling mortar wall. If the feeding device of the cone crushing station is improperly installed, or too much material is put into the crushing cavity, it will lead to uneven feeding, material blockage in the crushing cavity and other failures, which will cause excessive stress on one side of the crushing wall and the mortar wall. , increasing the cutting wear of the ore, causing serious damage to the liner and reducing its service life.
④The quality of the crushing wall and the rolling mortar wall itself
The above are the external factors that affect the crushing wall and the rolling mortar wall, and the quality of the crushing wall and the rolling mortar wall itself is the most important factor. A good-quality wear-resistant accessory has high requirements on the surface of the casting. Castings are not allowed to have cracks and casting defects such as slag inclusions, sand inclusions, cold insulation, pores, shrinkage cavities, shrinkage porosity, and lack of meat that affect performance. Currently, the crushing walls and rolling mortar walls of cone crushing stations on the market are generally made of high manganese steel. With the continuous development of science and technology, the performance of wear-resistant materials is also constantly improving. Generally speaking, it is necessary to choose a material that can quickly harden the surface under the action of impact load, forming a hard and wear-resistant surface, while still maintaining the original toughness of the inner metal, so as to improve the crushing wall and rolling mortar. wall life
