Selection of jaw crusher, roller crusher and hammer crusher
At present, there are various kinds of coal crushing machinery with different strengths and functions. This article makes a simple analysis on the working principle, application scope, advantages and disadvantages of the common jaw type, roller type, hammer type for reference.
1.Jaw crusher
Jaw crusher is mainly used for coarse crushing and medium crushing of hard and medium hard materials. When working, the main eccentric shaft brings the moving jaw plate to make periodic reciprocating motion relative to the fixed jaw plate, sometimes approaching, sometimes leaving. When the moving jaw is close to the fixed position? The material is broken between the two jaw plates When leaving, the crushed materials will be discharged automatically due to gravity. Because of its simple structure, reliable work, easy maintenance and low production cost, it is widely used in coarse crushing and intermediate crushing operations in coal, building materials and other industries.
However, due to the severe friction between the material and the jaw plate, the jaw plate wears quickly.
2. Roll crusher
Roller crusher is an old type equipment. When working, the materials on the two rolls are pulled into the gap between the two rolls by two relatively rotating rolls under the action of friction and broken. The distance between the two rolls determines the product particle size, and its structure is simple Easy maintenance, easy adjustment, less product crushing Therefore, it is widely used in the industrial furnace front molding machine at present. Its disadvantages are low crushing ratio and productivity, large equipment area, and uneven roller wear.
3. Hammer crusher
Hammer crusher uses a fast rotating hammer to crush materials. It is widely used for intermediate crushing and fine crushing of brittle and medium hardness materials. Because of its high crushing ratio (10? 50) Low energy consumption per unit output, convenient management, compact body, movable body and high production capacity Therefore, it is also widely used in the coal industry: small models with a productivity of 2 tons/hour or 3 tons/hour It is applicable to individual users of stand-alone supporting production.
Its disadvantage is that the working parts are easy to wear, the maintenance amount is large, and the feed moisture requirements are strict. When the moisture is too large, the grate bars are blocked, reducing the production efficiency.