2014/4/23 0:06:55
Vertical impact crusher also was named as “sand maker”, it is high-efficiency rock crushing equipment with domestic and international leading level.
The apparent density of the sand generally above 2.5, water absorption of 3.5% or less, preferably 3% or less. Because absorption indicates the proportion of aggregate particles within the pores, is an indicator of good or bad quality aggregates. Particularly the strength of aggregate has a great influence on the strength of concrete, especially of high-strength concrete. And generally high-strength concrete choose well-graded sand zone II.
Through removal of soil treatment, rock particles size of less than 4.75mm made by a mechanical crushing and screening, but does not contain soft rock, weathered rock particles. The material of 0.15-4.75mm in the concrete known as fine aggregate, also known as sand.
Because vertical impact crusher’s materials just falls within this area, therefore, vertical impact crusher as the first device for sand is doing my part.
Vertical impact crusher working mechanism
Vertical impact crusher is to use its kinetic energy generated by high-speed centrifugation, the material thrown out, get the energy materials and back plate, or a collision between the material and the material, causing a chain reaction of energy exchange:
From the design point of view, the rotor speed is generally 45 ~ 95m / s, but due to processing reasons, subscription causes, among other factors, in fact, 50 ~ 85m / s range, but for the sand making, this linear velocity is perfectly adequate.
The collision between high energy-large quality materials and smaller materials, or collide with the back plate forming a dramatic impact, thus crushed along its natural crackle; lower energy medium-grained materials and front shocks generated materials and other materials meet to form shock splitting and abrasion; the lowest energy-smaller materials are at a high-speed movement, produce a “sand spray” phenomenon, make it raging surging around the crushing chamber, thereby collide with each other, friction and grinding, until it lose enough speed to fall out of the cloud of particles and thus leave the crushing chamber.