Grinder screen
Photo courtesy Vermeer

5 ways to extend the life of a grinder screen

Tips from Vermeer on how to avoid issues with operating grinder screens.

November 4, 2022

Issues of screen life and contamination are ever-present in the life of grinder owners. However, there are several things that operators can do to maximize the life of their screens and reduce contamination in grinders.   

1) Use a bigger screen  

When it comes to maximizing screen life, it matters more about size than shape. It’s common for smaller-sized screens to wear out faster. The bigger the screen, the less sizing is required for the material to pass through it, which usually reduces the wear on the screen.  

2) Complete two passes instead of one  

One way to extend the life of screens and reduce contaminants at the same time is to do two passes through of grinder instead of one. Small screens’ primary grind can tear up screens if contaminants are present. So, doing a larger screen pass first will allow that contaminant to get through, without needing to be sized small enough to fit through a small screen opening.  

3) Remove contaminants on-site  

An operator is the front-line defense for removing contaminants before they make it into the grinder. It’s important to implement a discipline of removing contaminants onsite. Overall, contaminants cause the most problems when it comes to screen life.  

4) Use damage defense  

On Vermeer grinders, operators have a built-in way to help reduce contaminates: Damage Defense. The Damage Defense system will alert the grinder control and operator while automatically initiating the shutdown process if the mill comes in contact with certain metal contaminants.   

5) Educate the public  

One last area that can make a difference in reducing contamination is to help educate the general public. What can actually go in their recycling and what should go in their trash instead? Knowing what they can and can’t dump may help reduce overall contamination.