Tag Archives: finite element analysis

Haver & Boecker Niagara tackles high moisture levels with new elliptical screen

Haver & Boecker Niagara has engineered a new, elliptical motion Niagara XL-Class vibrating screen for a Brazilian iron ore producer that, it says, is ideal for applications challenged with high moisture content.

The new technology can handle capacities up to 3,500 t/h while minimising water usage, with the XL-Class running in an elliptical motion of up to 6 g in this high moisture iron ore screening application to ensure stratification in all phases of screening. The new vibrating screen also features an elliptical exciter drive that offers a bearing life up to 75,000 hours.

“We are dedicated to using innovative technological solutions to enhance our customers’ daily processes,” Denilson Moreno, Haver & Boecker Niagara Sales Manager, said. “Our new XL-Class design is a prime example of that. The vibrating screen’s unique elliptical movement maintains unrivalled screening performance when processing high moisture materials.”

Iron ore, for example, can contain up to 15% moisture, and often behaves like a pasty, clay-like material, prone to blinding on a screen deck. The elliptical movement motion and increased acceleration of the XL-Class ensures the material is stratifying without blinding or contamination, according to Haver & Boecker.

The elliptical motion XL-Class vibrating screen is available in a wide-range of sizes, in either a single module or tandem design.

Haver & Boecker Niagara manufacturers its own brand of Niagara Exciter technology, which functions as the drive system for all elliptical XL-Class vibrating screens. The bridge-mounted exciters are available in five different sizes and offer the largest static moment range on the market, according to the company.

Each elliptical XL-Class machine is custom designed to the operation’s specific application using Finite Element Analysis (FEA), which measures high stress areas and natural frequencies of a vibrating screen. The analysis helps engineers optimise machine performance by giving them the information they need to determine where to reinforce critical areas and reduce the weight of any oversized components, the company explained.

“With more than 15 years of FEA and experimental measurement experience – and nearly 400 high-capacity vibrating screens supplied to the global market – Haver & Boecker Niagara is able to engineer state-of-the-art high-capacity vibrating screens that offer easy operation, low maintenance and unmatched reliability,” it said.

Operations can pair the elliptical XL-Class with the with the company’s signature Ty-Deck Ultra modular screen media to maximise the screening efficiency of high moisture material and address its challenges, according to the company. Ty-Deck Ultra’s accelerated screening action cleans material without the use of water, therefore reducing the need for tailing dams.

With a 50% longer wear life than the original Ty-Deck, the screen media panels are an ideal choice for screening high moisture materials, such as iron ore, Haver & Boecker said.