MATERIALS HANDLING
SIZE UP THE IMPACT
A versatile Impact Sizer that helps operators control top particle size in coal and bauxite mining
Wirtgen’s Impact Sizer in action M
ining operators in the field need flexibility and precision when controlling top particle size and
particle size distribution, there are various methods and tools for doing this, not least an impact sizer. Wirtgen, experts in material size
management, launched their Vario Impact Sizer last year. The product enables operators to control the material size more effectively and to always keep it within the specifications, thereby reducing the likelihood of off-spec material. The system offers various setups and is field-proven in coal and bauxite mining applications.
GENERAL SYSTEM OVERVIEW Core to the Vario Impact Sizer is a split baffle plate mounted directly to the cutting drum housing. This plate is equipped with two primary adjustment mechanisms, providing the ability to control the size of the material that passes through the
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system with great precision. The first adjustment mechanism is the variable gap between the plate and the cutting drum. This gap can be adjusted in five steps to purposely generate additional crushing and thus modify the size of the particle sizer. A smaller gap leads to finer material, a larger gap
Scraper setting fully open no cover plates
leads to coarser material. This setting can be easily adjusted through pin installations, with each setting change taking approximately 10 minutes. Second, the holes in the scraper can be opened or closed with covers, based on the specific requirements of the operation in four different
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