Both in construction and in many others.Industries for grinding various materials and obtain the necessary fractions using special crushers. They are different models that are designed for a particular type of work. Depending on the type of crushing mechanism, there are conical, rod, hammer, jaw, roller and rotary devices.
What is a rotary crusher
Impact crusher is a shock machineactions intended for crushing materials of non-abrasive and medium strength rocks. Industry produces models for large, medium and fine grinding, structurally differing in the size of the rotors and the number of reflective plates. All of them provide high quality crushing.
The most popular type is rotary crusherSMD (stationary crushing machine), which consists of a frame, a rotor, a housing, reflective plates, hits and a mechanism for regulating the gap between the slab and the blows. Its feature is a special recirculation device, which allows you to eventually get a fraction of the material of the necessary shapes and sizes.
It differs from other species in thatthe devices with which crushing takes place are rigidly fixed on the rotor. Used for primary and secondary crushing of iron ore, basalt, dolomite, coal, marble and other materials. Impact crusher has high economic and technological characteristics, which ensures their popularity.
There are also mobile (on wheels)Impact crushers, which are designed to work in difficult conditions. When used, there is no need to transport the material, as they work directly in the processing area. The mobile crusher has high productivity and has excellent performance when crushing heavy rocks. It is used in the chemical and metallurgical industries, in various industries in the manufacture of building materials.
Classification
Depending on the unit's device, rotary crushers are classified into:
- non-reversible single-rotor crushers with or without grate;
- reversible single rotor;
- two-rotor with a lattice or without it.
Principle of operation
Easy-to-use impact crusher, principlewhose work is simple, performs crushing as follows. Bili, mounted on the rotor, rotate in a circle at high speed, destroying the material in the crushing chamber. It hits the walls and breaks up into smaller pieces. The grinding level can be adjusted by the speed of the rotor or the necessary clearance established between the reflective plate and the beaters.
Primary crushing of material is made withobservance of certain conditions. The moisture content of the rock should not be higher than 9–10%, and the content of quartz sand in it should be 10%. Impact crusher can be used at various stages of crushing even before complete grinding of the material.
Advantages and disadvantages
Impact crusher has a comfortable, smallexternal parameters. It has high performance and stability. Maintenance of these machines is not difficult, since their design is simple and reliable. For long service life and efficiency of the crusher, all working units and spare parts are made from high quality materials.
Due to the performance characteristicsunits can be used simultaneously to perform several stages of work. This allows you to increase productivity and save time. The process of crushing the material occurs uniformly, which ensures the same fraction size of each crushed piece.
In addition to the advantages, crushers of this type havelimitations. One of the main disadvantages is the inability to crush abrasive and hard materials. When grinding such rocks, beels and slabs quickly deteriorate, and the process of replacing them is complicated and expensive.
Applications
Used impact crusher in the mountain,electrical, metallurgical, chemical industries, construction. Especially popular is the crushing machine of this type in road construction for the production of rubble, the disposal of construction debris at facilities. Impact crushers are in demand due to simple design, high performance, ease of operation and energy efficiency.
