PRECIOUS METAL POWDERS RECOVERY

In processes where precious metals are recovered from fusion residues, milling of the solidified ashes generates a mixture of metallic particles and fine ash. Without proper separation, valuable metal fines may be lost in the dust fraction, and airborne ash can impair working conditions and complicate housekeeping. An integrated recovery system helps concentrate metallic particles while isolating volatile components from the surrounding environment.

The classification step focuses on intercepting and recovering even very small metal particles from the milled product stream. By separating metallic fractions from the bulk ash, it is possible to improve the overall recovery rate and prepare the material for downstream refining steps. At the same time, controlling the dust fraction reduces the dispersion of fine ash, contributing to cleaner and safer workplaces.

Vibrating sieving is particularly suitable for this task, as it combines precise separation with the ability to handle abrasive and dense powders. Key parameters such as mesh size, throughput, and installation point must be defined according to the fineness of the metal particles to be recovered and the characteristics of the milling line. The system must also limit dust escape and facilitate closed handling of the milled product.

MLT Cuccolini can supply dedicated systems that collect the powder flow directly from the mill and feed it to a VPB zero‑gap vibrating sieve. This configuration allows the recovery of very small precious metal particles with high efficiency, even when the overall batch size is limited. The zero‑gap design minimises product retention and facilitates the complete discharge of recovered metal fractions, which is particularly important for high‑value materials.

By integrating the sieve into a controlled enclosure and appropriate extraction or containment devices, the system contributes to keeping volatile ash isolated from the surrounding area. This reduces dust dispersion in the plant, supports compliance with occupational hygiene requirements, and improves general cleanliness around the recovery line. The compact footprint and modular design make it possible to adapt the solution to existing layouts and different milling technologies.

Using MLT Cuccolini VPB zero‑gap vibrating sieves within an integrated recovery system helps maximise the capture of fine precious metal particles while keeping volatile ash under control. This enhances the economic value of the recovery process, protects downstream refining steps, and contributes to cleaner, safer working environments.

The combination of precise separation, closed handling, and flexibility in system design makes these solutions particularly suitable for operators dealing with precious metals in powder form, whether in primary production or in recycling and refining contexts.

Contact MLT Cuccolini to discuss your precious metal powders recovery process and define the most suitable VPB zero‑gap sieving system and layout for your specific installation.