Smarter screening, less downtime

Tackling the screening bottlenecks

Screening performance can have a significant impact on the efficiency of an entire mineral-processing circuit. Macauley says customers are currently dealing with a range of challenges, including blinding, pegging, excessive wear, poor feed distribution, incorrect screen setup, and reduced screening efficiency.

The variability of the material being processed adds another layer of complexity. “Variable ore characteristics, including moisture and clay content and particle shape, can also affect performance,” says Macauley.

When screening equipment is not correctly matched to the application, the consequences can extend well beyond the screen itself. Poor performance can reduce plant throughput, increase recirculating loads, accelerate wear, and ultimately raise operating costs.

For this reason, customers are increasingly looking for screening products that balance service life with performance. “Demand is strongest for screening products that balance service life with metallurgical performance and are, therefore, fit for purpose,” says Macauley.

Maintenance requirements and safety are also becoming increasingly important considerations, particularly in operations where frequent intervention can contribute to downtime and expose personnel to unnecessary risks.

“Customers are also prioritising solutions that simplify maintenance and reduce safety risks, helping to limit injuries and subsequent unplanned plant downtime,” he adds.

Screening as part of the bigger picture

Selecting the correct screen is only one part of achieving consistent performance. Effective screening allows accurate material separation ahead of processing, helping operations to improve throughput while protecting downstream equipment and supporting mineral recovery and product quality.

Macauley emphasises the importance of taking a holistic view of the screening application.

“A holistic approach combining the correct screen deck design and screening media with appropriate operating parameters, feed chute arrangements, accessories, condition monitoring, and proactive maintenance can deliver measurable gains in plant performance,” he says.

This approach places greater emphasis on how the individual components of a screening circuit work together, rather than treating screening media or equipment as an isolated purchase.

Media matters

Screening media selection has a direct bearing on total cost of ownership, particularly in abrasive applications where excessive wear and premature failure can result in frequent changeouts and production loss.

“Screening media selection is critical to balancing throughput, wear life, maintenance requirements and downtime,” says Macauley.

The media therefore needs to be matched to the application, taking into account ore characteristics and operating conditions. Multotec uses application-specific polyurethane or rubber media, with aperture configurations and designs selected according to the material and screening requirements.

“Application-specific polyurethane or rubber media, correctly configured apertures and self-cleaning or anti-blinding designs can improve screening performance, extend service life and help reduce the total cost of ownership,” he explains.

The emphasis on total cost of ownership reflects a broader shift in how customers assess screening equipment. Rather than focusing solely on the initial purchase price, operators are considering the longer-term implications of wear life, maintenance, downtime and overall performance.

Making maintenance safer

Reliability and maintainability remain key requirements for screening equipment, with customers looking for longer wear life, reduced maintenance requirements, and minimal downtime.

Multotec has responded with developments aimed at making routine interventions quicker and safer. Features such as modular deck conversions and pinless fastening systems can simplify media changeouts while reducing maintenance downtime.

“A key development focus is reducing maintenance time and making maintenance activities easier and safer,” says Macauley.

The company has also developed several hammer-less attachment systems that reduce the risk of hand injuries. These are designed to shorten maintenance interventions while reducing the safety hazards associated with conventional attachment methods.

For processing plants, the benefits extend beyond the time saved during a single maintenance activity. Easier and safer access can support more consistent preventative maintenance, helping operators address wear and other issues before they develop into more disruptive failures.

Towards smarter screening

Technology is also beginning to influence how screening equipment is monitored and managed. One of the key trends identified by Macauley is the growing use of artificial intelligence within mineral processing.

“The market is moving towards the use of artificial intelligence to monitor performance, predict failures and optimise the performance of screening media on vibrating - and trommel screens,” he says.

As this technology develops, the ability to use operational data to identify changes in performance and anticipate potential failures could become increasingly important.

At the same time, the fundamental requirement has not changed. Customers continue to demand screening products that provide consistent, efficient and optimised performance across mineral-processing circuits.

For Macauley, the direction of the market is therefore not only towards new technology, but towards screening solutions that combine efficient performance, reliability, safety and maintainability.