METSO Barmac B-Series VSI Crushers and About the Barmac VSI

The Barmac B-Series Vertical Shaft Impact (VSI) crusher is the original rock-on-rock VSI crusher – not a pretender.

Helping you be successful
Our aim is to build the Barmac VSI brand by helping our customers achieve the success they desire. Three key things that will help us do this: they are, quite simply, service, excellence and innovation. We aim to service the hell out of our customers, be excellent in everything we do and provide innovative product technology.

Barmac VSI technology and experience in designing, applying and servicing autogenous VSI crushers in an extensive variety of applications has enabled design staff to produce a crusher which meets the market’s need for producing increasing quantities of material to required specifications.

About the Barmac VSI
The Barmac VSI is an ideal third or fourth stage crusher designed to crush the complete range of ores, rocks and minerals. The Barmac rock-on-rock crushing principle has revolutionised material reduction by providing a crusher that produces excellent reduction at a low operating cost.

Barmac VSIs combine high velocity impact crushing with attrition crushing to produce cubical product & quality sand. Barmac VSIs are unique amongst all vertical shaft impactors due to the pure rock-on-rock principle. Impeller shoes or impact anvils are not needed to achieve reduction.

With over 3000 units operating in aggregate and mineral processing installations around the world, the Barmac VSI has an established track record of cost savings, durability and unmatched performance in a variety of applications. The Barmac VSI is the only thoroughly field proven, successful rock-on-rock vertical shaft impactor.

The Barmac VSI gives you:
Superior cubically shaped product
The lowest possible cost per tonne
Improved energy efficiency
Lower wear costs
Improved crushing performance and control
Versatility to operate in many demanding and diverse applications
Cost effective serviceability

The User-friendly VSI
The Barmac VSI is designed with ease of installation in mind. It arrives on site either as a number of bolt together components or partially assembled.

Assembly, installation and commissioning can be achieved by two people in 2-3 days. Foundation requirements are minimal due to the light weight of the machine and the minimal dynamic forces when in operation. Existing support work can be used or a support frame, legs and skid can be supplied.

Optional Extras
Barmac Automatic Crusher Regulation (ACR) System
Barmac Operational Control System (VOCS)
Barmac Roof Lifter
Barmac Automatic Lubrication System

Unique operation

The Barmac VSI rock-on-rock crusher uses a field proven, rock-lined rotor that acts as a high velocity, dry stone pump, hurling a continuous rock stream into a stone lined crushing chamber.

Material fed into the top of the machine is accelerated in the patented rock lined rotor, and is continuously discharged into the crushing chamber at velocities of up to 85 metres (275 feet) per second.

This process replenishes the rock lining while at the same time maintaining a rock-on-rock chain reaction of crushing and grinding.

The Barmac VSI has demonstrated a unique ability to operate in many diverse crushing operations. This has been made possible by the unique free impact crushing and grinding action and the ability to fine tune this process by such simple actions as changing rotor speed and cascade ratio.

Superior crushing

The overall crushing action in a Barmac VSI is more complex than many other crushers because several different crushing mechanisms are involved.

The Barmac VSI makes product of superior cubical shape.

Size reduction is achieved by several fracture mechanisms which occur when particles collide with each other and with the rock beds within the rotor and crushing chamber. These mechanisms are:

Impact or Shatter
Cleavage
Attrition
Abrasion.

The type of fracture mechanism prevailing depends entirely on the nature of the collision (direct or glancing) and the speed at which it occurs. The high energy interparticle and particle-to-rock-bed collisions produce a particle breakage chiefly along planes of weakness, such as mineral boundaries, jointing and micro fractures, freeing the natural grains without over grinding. The resultant product is freer of weak zones, cubically shaped and often has the valuable mineral exposed or liberated.

Several design features such as rotor size, cascade ratio, rotor speed and crushing chamber liner profile, can be adjusted to enable a wide range of control over the final product grading.

This is the unique Barmac VSI crushing process. It combines several fracture mechanisms to reduce and shape rock particles with high energy efficiency, low wear costs and great application versatility.

Barmac B Series VSI product range

The Barmac VSI has been developed into the most effective, user friendly vertical shaft impact crusher available. The basic design criteria is based around a crushing efficiency factor and the model range reflects this criteria.

With capacities from 3 to 1580 tonnes per hour, the Barmac VSI range fits into the broadest applications.

Small units

The smaller units are suitable for laboratory or pilot plant situations. They also fit effectively into industrial mineral processing or specialist aggregate and sand manufacturing applications.

Mid-size units

Mid-size Barmac VSI models of between 50 and 150 tonnes per hour capacity have been accepted in main stream aggregate, sand manufacturing and smaller precious mineral processing plants.

Large units

Larger Barmac VSIs, including the XHD units for 24 hour heavy duty applications, have capacities of up to 2080 tonnes per hour. They provide the aggregate and mineral processing industries with cost effective, high tonnage production.

The Barmac VSI range of crushers provides the comminution industry an economic solution to the production of cubical aggregate, manufactured sand, heap leaching products, fine industrial minerals and pre-milling products.

Barmac VSI services

The skills and knowledge acquired from 25 years of manufacturing, applying and servicing the Barmac VSI allow the best solutions to be given to the customer to help maximise the potential of their operation.

To ensure the best service to Barmac VSI customers, Metso provides a comprehensive product support team of dedicated professionals, based at the factory and in the field. We provide full after market support for the Barmac rock-on-rock VSI.

Options for the Customer

Metso offers a range of options which allow the customer to maximise the use of their Barmac VSI, both now and in the future:

Rotor Lease Programmes
Ongoing Product Development
Laboratory Testing
Maintenance Schools
Technical Service Specialists
Specialist Application Knowledge
Support Literature available in a wide variety of languages

Product support

To ensure the best service to sales persons and customers of the Barmac VSI, Metso’s Mining and Construction Technology provides a comprehensive Barmac VSI product support team.

The skills and knowledge acquired from 25 years of manufacturing, marketing and selling the Barmac VSI allow the best solutions to be given to the customer to maximise the potential of their operation.

Research and Development

To maintain the best product and a distinct market edge, Metso (Matamata) employs a team dedicated to the research and development of the Barmac VSI.

This focus ensures the customer is buying the best VSI on the market and, with continued after market support, ensures the latest innovations can be applied to further improve the machine.

The Barmac VSI R&D team has established a full scale crushing circuit in a customer’s quarry. It is here that trials are conducted on new parts and innovations in Barmac VSI technology.