Wood Chip Sorter for Multiple Size Screening: UK Case Study

A UK customer needed to sort wood chips containing roots and small debris into different size fractions. The material had a relatively low bulk density of 200–250 kg/m³, while the screening requirements involved multiple particle sizes rather than a single oversized-material separation.

Based on the customer’s material characteristics and screening requirements, Sanyuantang configured an FYBS-4060 Wood Chip Screener Oscillating Screen with four screen layers using 70, 55, 35 and 12 mm apertures. The project was installed in 2 days and commissioned in 1 day.

Project Summary

Customer’s Screening Challenges

The customer’s raw material was more complex than a clean wood-chip feed. In addition to wood chips, the feed contained roots and small pieces of debris, with noticeable differences in particle size and shape.

The customer therefore needed a screening solution that could:

• Handle irregular wood chips and mixed feed materials
• Separate different wood chip sizes
• Accommodate a bulk density of 200–250 kg/m³ 
• Provide multiple screening sizes within one machine

This was different from a simple application where the objective is only to remove oversized wood chips.

Sanyuantang’s Wood Chip Sorting Solution

To meet the customer’s requirements, Sanyuantang configured the FYBS-4060 as a four-layer wood chip sorting system.

The screen apertures were:

70 mm → 55 mm → 35 mm → 12 mm

The material passes through successive screening decks, allowing different size fractions to be separated during the screening process.

The basic process is:

Mixed Wood Chips + Roots + Debris → FYBS-4060 Wood Chip Sorter → 70 mm → 55 mm → 35 mm → 12 mm → Multiple Size Fractions

The actual proportion of each fraction depends on the incoming material’s particle-size distribution, moisture content, shape and feed conditions.

For more product information, please visit our product page: Wood Chip Screener Oscillating Screen

Why FYBS-4060 Was Recommended

1. Four-layer configuration

The customer required multiple size classifications rather than one simple screening point. The FYBS-4060 could be configured with four screening decks, making it suitable for the required 70 / 55 / 35 / 12 mm separation.

2. Suitable for irregular wood chips

Wood chips are irregular materials. Their length, width, thickness and orientation can vary significantly. The oscillating screening motion provides continuous movement across the screening surface, supporting the separation of irregular bulk materials.

3. Adapted to complex feed material

The customer’s material contained not only wood chips but also roots and small debris. The screening configuration was therefore selected according to the actual feed characteristics instead of treating the material as a uniform wood-chip stream.

4. Based on actual material density

The wood chips had a bulk density of approximately 200–250 kg/m³. Sanyuantang engineers considered bulk density together with particle size, material composition and required screening fractions when configuring the equipment.

Sanyuantang Engineers’ Recommendations

For a wood chip sorting project, Sanyuantang recommends providing more information than simply the material name.

Before selecting a wood chip sorter, customers should confirm:

1. Required particle sizes: Define the minimum and maximum sizes and how many final size fractions are required.

2. Material composition: Identify whether the feed contains roots, bark, oversized wood pieces, stones or other debris.

3. Bulk density: Bulk density affects the material volume handled by the screening system and should be considered during equipment selection.

4. Moisture and particle shape: Wet or irregular wood chips can behave differently on the screen. Moisture content and particle geometry should therefore be considered when selecting screen apertures.

5. Number of screening decks : One screening deck may be sufficient for simple oversized-material separation. Multiple decks are more appropriate when several particle-size fractions are required.

Conclusion

This UK project required more than simple wood chip screening. The customer needed to process a mixed feed containing wood chips, roots and small debris and separate it into multiple particle-size fractions.

Sanyuantang selected the FYBS-4060 and configured four screen layers with 70, 55, 35 and 12 mm apertures according to the customer’s requirements and the material’s 200–250 kg/m³ bulk density.

If your wood chip sorting project involves mixed materials, multiple size requirements or unusual feed characteristics, send us your material size, bulk density, moisture content and required screening ranges. Sanyuantang engineers can recommend a suitable screening configuration for your application.

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