Modern Quarrying Q4 2022

The difference between using one type of screen media versus the optimal blend of screen media can add up to thousands of dollars in downtime and expense in a year.

All images courtesy of Haver & Boecker Niagara Steve Fair is the Tyler engineered media manager at Haver & Boecker Niagara. He works with customers to identify screening challenges, improve their screening applications and increase screening efficiency.

KEY TAKEAWAYS

Consider the three phases material goes through as it passes over the vibrating screen deck, from layered to basic to sharp. Producers can customise the screen deck by choosing screen media suitable for each phase by accounting for open area and wear life to maximise productivity. In the layered phase, as material of all sizes hits the screen deck, the media should handle a deep bed depth, high impact and a mix of coarse and fine particles. Heavy-duty options incorporating polyurethane, rubber or metal plate excel in withstanding high top sizes and abrasion. Material should stratify in the middle of the deck during the basic phase, and near-size and oversize particles should be at the top of the material being screened. For this stage, choose a type of media that combines maximum open area and wear life. Some manufacturers offer hybrid screen media options that

The difference between using one type of screen media versus the optimal blend of screen media can add to downtime and expenses in a year.

A vibrating screen operator should examine wearability to determine whether media in the three phases is reaching maximum potential.

A manufacturer should provide ongoing support.

Some manufacturers offer hybrid screen media options that pair polyurethane’s durability with open area similar to woven wire.

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MODERN QUARRYING QUARTER 4 | 2022