RARE EARTHS CLASSIFICATION

Rare earths such as neodymium and other critical elements are often processed as fine powders, either from primary production routes or from recycling of end-of-life components. These powders can be highly reactive, dense, and sometimes prone to oxidation, making both classification and containment key aspects of plant design. Effective granulometric control is essential to meet the specifications required by downstream processes, such as magnet production or advanced materials manufacturing.

The classification process focuses on separating the raw powder into well-defined fractions, removing oversize particles, foreign bodies, and undesired fines, while obtaining on-spec product with the required particle size curve. This operation directly influences flowability, packing density, and compaction behaviour, as well as the homogeneity of mixtures when rare earth powders are combined with other components. At the same time, proper classification helps protect downstream equipment and stabilise process conditions.

Vibrating sieving is particularly suitable for rare earth powders when combined with appropriate containment and inertisation measures. Key parameters include mesh size, throughput, and installation point, but also the need to manage oxygen exposure, dust emissions, and operator safety. Multi-deck configurations can be used to obtain several fractions from one feed stream, supporting different product grades or reuse paths within the same production environment.

For this segment, MLT Cuccolini supplies integrated systems based on circular X-Line vibrating sieves, similar to those used for inerted metal powder handling. These systems can include bin loading, controlled feeding devices, multi-stage classification, and final discharge into dedicated collection bins, all under inert gas. The objective is to provide precise granulometric separation while maintaining full control over the powder atmosphere and minimising fugitive emissions.

In applications such as neodymium powder recovery, the integrated system manages the entire route from incoming powder to on-spec fractions ready for reuse or further processing. Proprietary control software coordinates vibration parameters, product flow, and inert gas management, ensuring stable operation and traceability across different batches and grades. Quick-connect interfaces for bins facilitate safe, closed transfer of powders between process steps.

The modular design of these systems allows adaptation to different capacities, plant layouts, and product specifications, whether the installation is dedicated to primary production or to recycling lines. Stainless steel construction, attention to cleanability, and compatibility with ATEX or similar requirements support long-term reliability and compliance with relevant safety and environmental standards.

Using MLT Cuccolini integrated X-Line systems for rare earths classification enables precise and reproducible control of particle size distribution under safe and contained conditions. This contributes to higher and more consistent product quality, better protection of downstream equipment, and reduced waste in both primary and recycled rare earth streams.

The combination of fine cut capability, inerted system design, and flexible automation makes these solutions particularly suitable for energy and advanced materials applications, where rare earth powders play a critical role and process robustness is essential.

Contact MLT Cuccolini to discuss your rare earths classification needs and define the most suitable integrated vibrating sieving system for your specific energy or advanced materials application.