The role of impact crusher in sand and gravel aggregate production lineDate: 2019-06-27 Views:
The impact crusher is a device that uses impact energy to break stones. Because it is a vertical shaft design, it is also called vertical shaft impact breaking and vertical sand making machine.
Vertical shaft impact breaking technology comes from abroad, specifically Metso Barmac sand crushing technology. Through the introduction of technology in the 1980s and 1990s, it has settled in China and continues to develop. However, the vigorous development and breakthrough development of the vertical axis impact is still after 2000, because with the acceleration of urbanization in China, natural gravel and sand can no longer meet the construction needs, the mechanism of gravel and sand gradually rises, and the gravel equipment also welcomes Come to a development period, in which there is a vertical axis impact.
The role of impact crusher in sand and gravel aggregate production line
There are two working principles of the impact crusher, one is the whole center feeding, and the other is the waterfall center feeding combination.
Full-center feeding: After the stone or fine pebbles that meet the feed specification (generally below 40mm) enter the impact break, the initial acceleration is given to the centrifugal movement by the feeding cone, and the material moves to the edge of the impeller and is thrown by the throwing head. The material being thrown has a high speed, which in turn hits the perimeter guard and is bounced off by the perimeter shield, countering the next wave of material thrown. Of course, after a long period of production, a padding layer will be formed on the peripheral panel, and the effect between the materials will increase.
Waterfall flow feed: After the stone or fine pebbles that meet the feed specification (usually below 40mm) enter the impact break, part of the material enters from the center of the impeller, and the other part enters from the periphery of the impeller. The material entering the center will be accelerated by the feeding cone and run to the periphery of the impeller to be accelerated by the throwing head. The accelerated material will impact the material curtain. After some materials have kinetic energy, they will hit the peripheral protective plate and rebound.
Two different working principles have achieved two major functions of the impact crusher in the sand and gravel aggregate production line: fine crushing sand and aggregate shaping.
The whole center feeds the material before the hammer head contacts, which is easier to smash, but the throughput is limited, so it is suitable for the production of machine sand; the waterfall flow feeds, the material has more contact between the materials, and the fine crushing ability is appropriately reduced, but the throughput is Large, suitable for stone shaping.