⎪ Innovative engineering ⎪
Improve stratification Combining advanced eccentric screening technology with the best screen media for the application is a recipe for success. Specifically, polyurethane screen media can be a valuable asset for any operation seeking to prevent blinding and pegging, improve material strati- fication, and increase wear life. Polyurethane media offers the best combi- nation of open area and wear life for both wet and dry applications. In particular, open-cast polyurethane screen media can deliver 1.5 to 2 times the wear life of injection-moulded products. Poured, open-cast polyurethane permanently hardens when cured to maintain its chemical properties and improve wear life. Alternatively, injection-moulded screen media can soften as temperatures rise, reduc- ing wear life. Polyurethane screen media also features tapered openings to reduce the risk of blinding and pegging. The solution to improving material strati- fication is to select the optimal screen media mix to ensure all screening phases operate correctly. A screen media company that of- fers a variety of screen media types can help evaluate how material progresses through the three screening phases – layered, basic and sharp – and provide recommendations on the best screen media for an application. Producers can customise the screen deck by selecting screen media that maximises productivity for each phase, blending the best combination of open area and wear life. Prevent equipment damage A vibrating screen needs regular checkups to run optimally. Vibration analysis and diagnos- tic systems designed by OEMs for vibrating screens are reliable tools for maintaining the efficiency and longevity of screening machines. To ensure optimal productivity, operations can partner with an OEM that spe- cialises not only in manufacturing equipment but also in providing additional diagnostic tools, product-specific knowledge, and years of engineering experience. Utilising vibration analysis software, for example, enables mining and aggregates operations to monitor a vibrating screen’s performance in real time, detecting issues before they lead to diminished performance, decreased efficiency, and increased operating costs. The most robust systems incorporate eight wireless sensors that magnetically fasten to key areas of a vibrating screen, measuring orbit, acceleration, deviations, and other key data points related to the machine's condition. The sensors send real-time data wirelessly for analysis, ideally by an OEM- certified service technician who can provide a detailed summary and recommendations. Some manufacturers use vibration analysis to offer impact testing (a bump test), which
By continuously monitoring the vibrating screen's acceleration, specific systems can forecast the equipment’s dynamic condition at intervals of 48 hours, 5 days, and 4 weeks. With consistent use, condition monitoring software will accurately identify and predict critical issues, advise on when to schedule maintenance, and focus on the right areas during planned downtime. By using diagnostic programs for regular analysis and engaging in predictive and pre- ventative maintenance, operations will see minimised downtime through faster problem- solving, lower repair costs, and greater peace of mind. Increase profits through advanced technology The development of the double eccentric screen and other screening technologies provides operations with innovative, cost- effective ways to increase profitability and efficiency. By integrating the right equipment, screen media, and vibration analysis systems, producers can achieve higher uptime, im- proved quality, increased productivity and greater profits. https://haverniagara.com/
helps ensure proper machine calibration and promotes efficient operation. Impact testing involves striking the machine at key points with a dead-blow hammer while it is off. Vibration analysis sensors are installed at key locations on the vibrating screen, and a technician measures the machine's natural frequency. Based on the results, engineers can adjust machine parameters to avoid resonance, which can reduce productivity, damage vibrating screens, and pose safety risks. It is important to note that the natural frequency can shift over time as components are re- paired or replaced, so impact testing should be conducted regularly. By incorporating impact testing into an operation’s regular maintenance routine, producers can ensure optimum screening performance and equip- ment reliability. Another advanced diagnostic tool is con- dition monitoring, which uses modern algo- rithms and artificial intelligence to monitor the health of vibrating screens. The system utilises permanent sensors that monitor the equipment 24/7 to capture real-time informa- tion and provide alerts via e-mail immediately upon the first sign of a potential problem.
By analysing application requirements, producers can strategically select a blend of screen media that maximises their vibrating screen's performance across all screening phases, from layered to basic to sharp
Eccentric technology virtually eliminates vibration in the extended structure, which protects the integrity of the screening machines.
January-February 2025 • MechChem Africa ¦ 39
Made with FlippingBook flipbook maker