ROASTED COFFEE GRAINS DEDUSTING

During conveying from the roaster to storage and packaging, roasted coffee beans are subject to impacts and friction that inevitably produce fragments, chaff residues and fine dust. If not removed, these unwanted fractions can impair the appearance of whole‑bean products, affect dosing accuracy and contribute to build‑up in downstream equipment and filters. A dedicated dedusting stage on vibrating sieves allows producers to extract these fines while handling beans gently to preserve their integrity and aroma.

Vibrating sieving is particularly suitable for this task because it combines controlled motion with adjustable mesh sizes and deck configurations. By installing the dedusting unit at the correct point in the line — typically downstream of the roaster and before storage or packaging, often in connection with vacuum conveying systems — process engineers can stabilise throughput and avoid overloading filters or cyclones with unnecessary dust. At the same time, the open screening surface ensures that the full bean flow passes across the mesh, maximising dedusting effectiveness.

For roasted coffee grains, MLT Cuccolini proposes VPB/M vibrating sieves in sizes adapted to the required throughput and available headroom. Their vertical‑motor drive generates a calibrated three‑dimensional motion that moves the beans gently across the screening surface, while allowing dust and small fragments to fall through the mesh. Because the entire product stream is treated on the screen before reaching the oversize outlet, the sizing of VPB/M units takes into account the need for relatively generous screening areas compared to conventional classification duties.

Where higher dedusting volume is required, the T‑Line VTU tumbler screening machines can be applied to roasted coffee grains. The tumbling motion offers particularly gentle handling of the beans, combining effective dedusting with the possibility to separate different size classes if needed. This technology is well suited for installations immediately downstream of roasting or conditioning stages, where preservation of bean integrity and minimal generation of additional fines are priorities.

In both VPB/M and T‑Line VTU configurations, hygienic stainless-steel execution, easy access to the mesh area and smooth internal geometries support regular cleaning and inspection. This helps maintain stable operating conditions in environments where coffee dust and volatile compounds must be carefully managed, while facilitating layout integration with existing vacuum conveying and storage systems.

Choosing MLT Cuccolini solutions for roasted coffee grains dedusting allows producers to deliver cleaner, more visually uniform whole‑bean products while reducing dust loads in downstream filters and equipment. The result is improved packaging presentation, more reliable dosing and a reduction in unplanned stops caused by accumulation of fines in the line.

By combining gentle yet effective vibrating or tumbling motion with flexible installation options, MLT Cuccolini supports coffee roasters and plant designers in defining the most suitable sieve type, size and mesh configuration for each roasted coffee line, from small specialty plants to large industrial facilities.

Are you looking to improve dedusting of roasted coffee beans between roasting and packaging in your plant? Contact our team to review your process and identify the MLT Cuccolini vibrating sieve or tumbler solution best suited to your throughput, layout and product quality targets.