Vertical Impact Crusher (For Refractory Materials)

Vertical Impact Crusher Performance Characteristics

1.The finished product is three-dimensional, particle type, grade with rationalization.

2. Low consumption of wearing parts, low metal content, more than 40% lower than the use of traditional equipment costs.

3. Maintenance is quick, convenient and durable.

4. Optimized design, create an ideal dust accumulation environment, reduce dust.

Vertical Impact Crusher Parameters

The Vertical Impact Crusher (VSI Crusher) is a crushing machine that utilizes a high-speed rotor to accelerate and project feed material against either a wear-resistant anvil (rock-on-steel) or other feed material (rock-on-rock). This high-energy impact fractures the material, resulting in a highly cubical product and excellent reduction ratios. Here's a breakdown of the working principle:

1. Feeding the Material:

Feed material (typically crushed rock, gravel, or other abrasive materials) is fed into the crusher through a central feed tube or inlet located at the top of the machine.

2. Rotor Acceleration:

The feed material drops onto a rapidly spinning rotor. The rotor is a critical component of the VSI crusher and is designed with strategically placed wear-resistant shoes or hammers (also called tips, paddles, or launchers).

As the rotor spins at high speeds (typically ranging from 600 to 2000 RPM, depending on the model and application), centrifugal force throws the feed material outward.

The shoes/hammers on the rotor accelerate the material to very high velocities – often exceeding 60-80 meters per second (200-260 feet per second).

3. Crushing Methods (Rock-on-Steel vs. Rock-on-Rock):

Rock-on-Steel (Anvil Ring): In this configuration, the high-velocity feed material is ejected from the rotor and impacts against a stationary, wear-resistant anvil ring lining the crusher chamber. The impact shatters the material. This method is often used for higher capacity crushing and where product shape is less critical. It's typically more abrasive and results in higher wear on the anvil ring.

Rock-on-Rock (Autogenous Crushing): Here, the crusher is designed without an anvil ring. Instead, some of the feed material is diverted into a retaining bed around the perimeter of the crushing chamber. The high-velocity material ejected from the rotor collides with this stationary bed of feed material. The collision causes the particles to fracture against each other. This method produces a superior cubical product and minimizes wear on internal components, as the material is crushing itself. It's often preferred when product shape is a high priority.

4. Crushing and Fracturing:

Regardless of the crushing method, the high-energy impact causes the material to fracture along natural cleavage planes. This results in a cubical product with minimal elongated or flaky particles.

Multiple impacts can occur as the material bounces around within the crushing chamber.

5. Discharge and Screening:

The crushed material falls to the bottom of the crusher chamber.

It is discharged through an opening at the bottom of the machine.

After discharge, the material is typically conveyed to a screening system to separate it into different size fractions. Oversized material may be recycled back into the crusher for further reduction.