For the Symons cone crusher, every user knows the importance of the wear parts of mantle and bowl liner, they are the key components of the Symons cone crusher. The material is directly crushed in the crushing cavity composed of the two, so the wear and tear of the mantle and bowl liner is serious. In theory, their service life is generally in 5-6 months, but according to some feedback of users, the Symons cone crusher wear parts life cycle can hardly reach this level, some may need replacement as short as two weeks. Take the following cases for example
Case 1. Multi-cylinder hydraulic cone crusher in Sichuan province
Rock type: River pebbles
Feed size: ≤130mm
Discharge size: ≤50mm
Crushing Ratio: 3
Capacity: 100m³/h
Mantle and blow liner life cycle: 1.5 months, 10 working hours per day, 25 days per month
Case 2. Symons cone crusher in Zhejiang province
Rock type: River pebbles
Feed size: ≤150mm
Discharge size: ≤30mm
Crushing Ratio: 5
Capacity: 60m³/h
Mantle and blow liner life cycle: 3 months, 12 working hours per day, 25 days per month
3. Spring cone crusher in Shanxi province
Rock type: River pebbles
Feed size: ≤120mm
Discharge size: ≤30mm
Crushing Ratio: 4
Capacity: 80m³/h
Mantle and blow liner life cycle: three weeks, 18 working hours per day, 26 days per month
Above three examples are all based on raw materials of river pebbles, despite the difference in production, the cone crusher wear parts service life cycle differs by several times, why have so big differences? What factors are related to the life cycle of the mantle and bowl liner wear parts?
In general, the factors that affect the crushing effect and service life of mantle and bowl liner as follows, stone powder content and stone humidity, hardness and particle size of stone, feeding method, quality of mantle and bowl liner itself, etc.
1. Stone powder content and humidity
When the Symons cone crusher is working, if the stone powder content and humidity of the material is high, the material will easily stick to the mantle and bowl liner, as time goes on, it will not only reduce the production efficiency, but also corrode the mantle and bowl liner, this will shorten the service life.
For materials with high stone powder content, they should be screened by circular vibrating screen before crushing, thus fine powder can be avoided when crushing; for materials with high humidity, certain measures should be taken to reduce the moisture content before crushing, such as natural drying or mechanical drying.
Although the materials in the above 3 cases are all river pebbles, the differences in stone powder content and stone humidity will also lead to differences service life of the cone crusher wear parts.
2. Stone hardness and particle size
According to the different hardness of the material crushed by the Symons cone crusher, the degree of wear on the mantle and bowl liner is also different. The higher the hardness of the material, the more difficult it is to crush, the greater the impact load on the mantle and bowl liner in production, and the service life will be shortened accordingly.
When the stone hardness is the same, the larger the size of the stone entering the crushing chamber, the more severe the liner wear will be, and the service life will also be shortened.
In addition, uneven feed size will also affect the wear position of the liner plate, resulting in uneven liner wear, for example.
If the feed size is coarse, the crushing of the stone mainly occurs in the upper part of the crushing chamber, and the upper liner plate wears severely and its life is shortened.
If the feed size is small, the crushing of the stone mainly occurs in the lower part of the crusher, the lower part liner wears seriously, it reduces crushing capability increases the unit crushing cost.
Both operations will cause low crushing capability of the Symons cone crusher and irregular wear of liner plates, resulting in shortened life of liner plates and increased production cost.
3. Feeding method
The feeding method of the Symons cone crusher has a certain influence on the service life of the wear parts. If the feeding device is not installed properly, or too much material is put into the crushing cavity, it will lead to uneven feeding and material blockage in the crushing cavity, which will cause excessive force on one side of the mantle and bowl liner. This will cause serious damage to the liners and reduce the service life.
4. Quality of mantle and bowl liner
Most of the above-mentioned factors come from external influences, the quality of the mantle and bowl liner itself is the most important. A good quality of wear-resistant accessories, in addition to the material, has very high requirements in the casting surface. It is not allowed to have casting defects like cracks, sand holes, etc., which will affect the operation performance in a stone crusher plant.
At present, the mantle and bowl liner of cone crusher in 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. Overall, it is important to choose materials that can rapidly harden the surface under the action of impact load, forming a surface that is both hard and wear-resistant, while still maintaining the original toughness of its inner metal, so as to improve the service life of the cone crusher wear parts.
The Symons cone crusher wear parts are in direct contact with the stones, the mantle and bowl liner wearing is inevitable, what we can do is to extend its service life as much as possible and reduce the cost of replacement. Now the mantle and bowl liner materials used by Deya Machinery is Mn18Cr2 and Mn22Cr2, it greatly improves the service life, reduces the maintenance cost.
