Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/1522439
6 Reliable Plant Annual Edition | www . reliableplant.com e overall purpose is to keep the mill running as close as possible to maximum working capacity while at the same time avoiding the risk of mill overload, underload, and freewheeling. Providing high-res- olution toe position data with exceptional accuracy, the solution effectively allows operators to determine the ideal feed rate for optimal grinding conditions. Optimizing the toe position also positively impacts particle size distribution, an essential parameter for the efficiency of the separation stage. Further benefits include the monitoring of the following: • Inlet/outlet toe position – outlet blocked; difference inlet/outlet • Wear-and-tear on the liner and lifters • Density • Big rock occurrence • Easy and robust installation (two vibration sensors and one tachom- eter – no hardware attached to the shell) • Early detection of fault modes e toe-position monitoring solution measures the position of the charge toe with exceptional accuracy, using vibration measurements with patented HD condition-monitoring technology. e toe position usually differs at the inlet and discharge ends of the mill. is solution is unique in that it measures vibration at both ends rather than at a single position. e installation is straightforward and robust, without any equip- ment attached to the mill's rotating shell. A single vibration sensor on each side of the mill's main bearings measures the lifter signature, while a tachometer provides a reference signal. Charge-toe position data is displayed in a dashboard, updating the information approxi- mately every fifteen seconds. e update interval varies depending on the mill's rotational speed. As an added benefit, the dashboard also indicates the charge-toe area density. Unique, Data-Driven Optimization of the Screening Process For mining operators, productivity, safety, and environmental impact are ongoing challenges. At the heart of a mineral processing operation, the vibrating screen is a critical piece of equipment, the performance of which can influence all these factors. For optimal screening performance, uniform movement of the screen corners is crucial. e motion of the corners in relation to each other highly impacts throughput and production rates. The vibrating screen-performance monitoring solution is a process-optimization tool for visualizing screen motion. It provides insight into the dynamics of the screening process and enables oper- ators to optimize its efficiency. T he sc ree n-pe r for m ance monitor ing solution d etect s unfavorable screening conditions that can sometimes cause various problems, including: • Plugging and blinding • Mechanical stress • Excessive energy consumption • Process capacity losses COVER STORY " Equipment and processes per forming at a sub-optimal level can cause production inefficiencies, quality problems, and higher-than-necessary energy consumption, to name but a few adverse effects. The opportunity to gain actionable insights beyond the mechanical condition of critical machinery based on vibration data brings significant potential for certain data-driven process improvements. " Top view of a tumbling mill with sensor positions. The dashboard displays a polar plot showing the toe position in phase (degrees) and amplitude.