The crushing process makes Barmac® VSI unique. Whereas most other types of crushers use metallic parts to crush rock, Barmac VSI uses the rock fed into the machine to crush itself. This autogenous crushing action offers the lowest possible cost per ton of any impact crushing method. The high velocity impact crushing achieved in a Barmac VSI improves the soundness and shape of the material and produces the highest quality end products on the market today. It is widely known that the more cubical your product, the better its performance in concrete, asphalt and base mixtures.
Barmac VSI is usually applied in the last phase of the crushing circuit. The quarrying and construction industry has always been Barmac VSI’s main application area with thousands of units operating around the world, followed by many demanding manufactured sand, heap leaching, pre-grinding, industrial minerals and recycling applications. This is possible because of the unique free-impact crushing and grinding action combined with the ability to accept fines in the feed and to fine-tune the crusher’s performance by simply changing the rotor speed or cascade ratio.
The primary path for the feed material is through the stone lined rotor where material can be accelerated up to rotor tip speeds of 80 m/s (262 ft/s) before being discharged into the crushing chamber. Additionally, material may be cascaded into the crushing chamber, bypassing the rotor.
|Maximum feed size||37 mm (1 ½”)||45 mm (1 ¾”)||50 mm (2”)|
|Speed||1 500 – 2 500 rpm||1 100 – 2 100 rpm||1 000 – 1 800 rpm|
|Power||75 – 160 kW
(100 – 200 hp)
|160 – 320 kW
(200 – 400 hp) **)
|320 – 600 kW
(400 – 800 hp)
|Operational crusher weight||6 400 kg
(14 100 lbs)
|12 400 kg
(27 300 lbs)
|14 400 kg
(31 700 lbs)
|Maximum capacity with cascade||217 Mtph