Vertical Shaft Impactors

Salient Features

• ALMEIDA VSI Machines are easily portable & can be installed quickly with minimum support structures.
• Rock on Rock technology minimises wear & tear of parts, resulting into minimum operating & wear cost.
• Aggregates with excellent cubical shape.
• Low investment
• Benificiation of material. (elimination of soft stone)
• Consistency in Gradation.
• High Product Yield
• High Fracture Percentage.
• High Throughput Capacity
• Easy to maintain.
• Worn out parts can be easily replaced hence lesser downtime

ALMEIDA the leaders in Jaw Crushers Technology are proud to introduce the Vertical Shaft Impactors.

It is a next generation tertiary machine designed & manufactured with quality workmanship. Hence a robust & tertiary machine for concrete aggregates, sand manufacturing, asphalt mixing & materials for road base

It works on the principle of centrifugal force. Material to be crushed is fed into centre of the rotor, through a vertical tube. The rotor rotates at high speed of 50-70 m/sec (25-30 RPS). Due centrifugal force the feed material starts attaining speed & gets distributed over the distribution rock box. As the material reaches the rotor vanes, towards the periphery, attains the same speed as the speed of rotor's periphery. At the instant of leaving the rotor, material attains a velocity which is the resultant of peripheral velocity & redial velocity due to cenrtrifugal force. The direction of resultant velocity is almost 45° to radial direction.

The high velocity feed particles attain tremendous kinetic energy, so after impact against the breaking surface, stresses are developed within the particles & they disintegrate into number of pieces

ALMEIDA manufacture ROCK-ON-ROCK TYPE VSI: Rotor is designed in such a manner that stone layer gets formed on the vane & breaking surface is also formed by material built up. This reduces wear & tear of both, vanes & breaker walls. The advantage of this type of VSI is that, spare consumption is reduced but the cushioned surfaces reduce considerably the amount of crushing.