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.
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.
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.
Selecting and applying a Barmac VSI crusher correctly requires understanding the economic and application-specific factors. The desired production volumes define the optimal size of the crusher. Rock-on-rock or anvil crushing, on the other hand, results in slightly different end products than normal tertiary and quaternary compression type crushing.
Barmac VSI crushers produce cubical aggregate that performs well in concrete, asphalt and base mixtures. It can also be considered for fine crushing, particularly for abrasive materials, as it is not mechanically restricted in the same way as compression crushers are at fine settings.
If applied correctly, rock-on-rock crushing offers the lowest wear cost per tonne of any impact crushing method. In most cases, Barmac VSI crushers are applied in the last crushing phase of any crushing circuit. It is at this stage of the process where the crushing of the final products is performed, be it the production of superior shaped aggregates, manufactured sand, mill feeds, or liberation or separation of a particular mineral from its host rock.
Different quarries often utilize VSI crushers since they can produce high quality cubical shaped aggregates that meet all major construction specifications. Barmac crushers are particularly successful in producing road-base, top dressing chip, concrete and asphalt aggregates. In these applications, Barmac VSI crushers can be operated either in open or closed circuit, depending on the types of aggregates and the specifications required.
Accurate shaping capabilities and acceptance of fines make Barmac crushers excellent for manufactured sand production. Rock-on-rock crushing ensure low operating costs, and whenever more reduction is needed, or the feed is coarse, the crusher can be equipped with metallic anvils. Barmac crushers speed is adjustable, so they can also produce very fine end products if required.
With features such as controlled product grading, preferential crushing, low production costs and ability to produce finely graded products, Barmac VSI crushers can optimize the performance of most industrial mineral processing installations.
For example, the diamond mines have noticed that utilizing Barmac crushers simplifies the liberation of diamonds from gangue minerals. In addition, fine crushing cement clinker with Barmac crushers is gaining popularity since VSI crushers have proven their ability as cost-effective pre-grinders.
In mining metallic minerals, Barmac VSI crushers with high capacity and ability to produce finely graded products such as mill feed, sinter feed or material for heap leach operations, are ideal machines that can replace high-cost, inefficient crushing and milling equipment.
Barmac VSI crushers can outperform many other equipment in recycling applications. These recycled materials can be waste aggregates or demolition waste, slags, or even glass and other waste products that can be processed and sold.
Barmac crushers are also available as mobile and portable versions, which opens up a new range of business opportunities for contractors, quarry operators, recycling and mining applications. In addition to easier mobility, portable and mobile VSI crushers have advantages such as flexible process adjustability, less material transport required, less manpower needs, and compliance with strict environmental standards.
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.
Manufacturing / serial number: 2018.09.28-A | Latest inspection: 2018 | General grade (1 min - 5 max): 1 2 3 4 5 | Gross weight: 18,000 kg | Crusher operation: Tertiary | Crusher type: Impact crusher | Emiss...
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For mineral processing project, after blasting, crushing and screening system is always the first stage to reduce the big raw ore lumps to proper small particle size for following mill grinding system. Normally to reduce the big ore lumps to small particles, two to three stages crushing is required.
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Barmac VSI Crushers Barmac B-Series VSI. The Barmac B-Series VSI is unique due to its crushing process. Whereas most other types of crusher use metallic parts to crush rock, the Barmac VSI uses the rock fed into the machine to crush itself. This autogenous crushing process produces the best-shaped aggregate on the market today.
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