How others have improved profitability and reduced risks?
Barmac® crushers are generally used in the last phase of the crushing circuit. Due to their ability to produce precisely shaped end products, these crushers are most popular among aggregates producers, construction industry and recycling applications. In some mining operations, they are utilized in preparing the material feed for grinding.
High-quality end products
Superior cubical shape.
Increased uptime
Shorter maintenance breaks and longer wear life.
Easy to install and maintain
Minimal foundation requirements, maintenance lifting tools, and inspection door for rotor access.
Safety
Special tools for rotor service and crusher top half lifting.
Original Barmac® crushers
Barmac® vertical shaft impact (VSI) crushers were the first vertical shaft impactors in the world. The original Barmac® was developed in New Zealand over 40 years ago after which the VSI crushers have spread to thousands of crushing sites around the globe.
Barmac® crushers have evolved immensely over the years, but their trademark is still the same – accurately shaped end products.
In addition to the stationary crushers presented on this page, some VSI crusher models are also available as mobile or portable versions.
High-quality end products
The secret behind Barmac® crushers’ efficiency is the unique crushing process. While most other crushers reduce rocks by pushing them by force against metal, Barmac® crushers also utilize the rock to crush itself.
This so called autogenous crushing action results in lower cost per ton than any other impact crushing method. Furthermore, rock-on-rock crushing has proven to produce end products that have precise and homogenous shape.
Barmac® crushers are especially useful for producers who are after cubical end products used for example in concrete, asphalt, groundwork materials, manufactured sand, heap leaching, pre-grinding, industrial minerals, and recycling applications.
Increased uptime
Barmac® crushers accept fines in the feed and allow user to finetune crusher’s performance by changing the rotor speed or cascade ratio.
The primary path for feed material is through the rotor where it can be accelerated up to 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.
The cascade feature enables the operator to optimize the capacity and power consumption and to manipulate the product grading and shape to meet the specification requirements.
Easy to install and maintain
Barmac® crushers are designed to prolong the lifetime of wear parts and increase the operational availability by reducing the time needed for parts changes.
Service time is drastically reduced with quick access to the rotor parts via an inspection door. The roof lifter and rotor service arm eliminate the need for an external crane in regular maintenance which simplify servicing the internal workings and speed up rotor changes.
Simple and reliable automatic lubrication handles the daily greasing of the main shaft, and Metso IC™ crusher automation ensures safe operation and condition monitoring from distance.
Anvil solution
Barmac® VSI crushers can be equipped with metallic anvils on request.
In anvil solution the rock-on-rock cavity ring is replaced with an anvil ring.
The anvil solution improves Barmac® crushers’ reduction ratio and enables finer end products, but wear costs are slightly increased since the anvils must be replaced from time to time.
Barmac® B Series™ crushers technical specifications
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Barmac® B Series™ crusher models
Selecting and applying Barmac® B Series™ VSI crushers
Impact crusher parts and services
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Chamber Optimization Program
Get the maximum potential out of your size reduction process to achieve improved crushing performance and lower cost per ton. By using our unique simulation software, our Chamber Optimization experts can design an optimized crushing chamber that matches the exact conditions under which you operate.
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