How to Minimize Fines in Aquatic Feed Screening: SYJH Rotary Screener for Shrimp & Fish Pellet Lines

1. The Special Challenge of Aquatic Feed Screening

Shrimp feed and sinking fish feed require smooth surfaces and dense structure. However, after cooling and conveying, if pellets enter a vibrating screener for grading, the violent vertical throwing motion causes two major problems:

• Pellet breakage: Large amounts of fines are generated. These fines disperse quickly in water, wasting feed and polluting the pond.

• Inaccurate grading: Broken particles mix with whole pellets, reducing product uniformity.

For shrimp feed, every 1% increase in fines content directly raises feed waste and water exchange costs for farmers.

2. How the SYJH Rotary Screener Works

Unlike vibrating screeners, the SYJH uses low-speed horizontal rotation. Material rolls gently in a spiral motion on the screen surface instead of being thrown vertically. This motion applies minimal mechanical impact to pellets, making it ideal for aquatic feed — a material that is both fragile and expensive.

3. Core Technical Advantages

• Low-breakage screening: Horizontal rotation greatly reduces collision forces between pellets and between pellets and the screen. Fines content can be controlled below 1%.

• Wide capacity range: 3–22 t/h, suitable for both small shrimp feed lines and large fish feed lines.

• Fully enclosed dust-proof design: Aquatic feed dust absorbs moisture easily. The enclosed structure prevents both dust and moisture.

• Quick screen change: Split quick-open cover allows screen replacement in under 10 minutes, minimizing downtime.

4. Customer Benefits

Take a 5 t/h shrimp feed line as an example. If fines content drops from 4% to 1% during screening, an additional 3.6 tons of qualified shrimp feed can be produced per day. Over 300 operating days per year, the reduction in rework and waste is substantial. At the same time, improved water stability reduces farmer complaints and enhances brand reputation.

5. Recommended Configuration

The SYJH Rotary Screener can be installed after the cooler and before the packing machine, forming a complete aquatic feed finishing section together with your pellet mill and cooler.