Hello, thankyou for the question:

1. You are now 97% efficient, with 2-3% impurities

2. Normal screening efficiency rates are 95% efficiency which is considered efficient screening.

3. 5% moisture is considered DRY actually by VSMA rules or screening terminology (actually up to 6% is considered DRY)

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Main problems, TOUGH SCREENING due to very clean now, some moisture content which of course contributes to blinding, non free flowing

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I would do a test on a small two bearing circle throw unit making a plus minus 16 mesh cut. T304 stainless steel wirecloth, square mesh first, very fine wire diameter to TEST removing the overs.

SPEED, and stroke MUST be absolutely right here.

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TONNAGE is not big, but TINY percent of overs is the HARD PART. Must try to get the bed depth of material to NO deeper than 3 times the 16 mesh opening to achieve any efficiency.

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Could try a test with a special non plugging WIRECLOTH like a FLEXMAT tradename wirecloth by MAJOR wire.

IF this does not work, you could test on a NON BLINDING screening device with a moving polyurethane deck which vibrates at very high G FORCE and resists PLUGGING or BLINDING.

Cheers. ■

This is caused by the very fine particles, being exposed to mechanical spark or ignition.

This is quite common in the GRAIN handling industry. They use special equipment for fine screening and very strong rules for type of mechanical devices and complete resistance to explosion.

Not truly my comfort level, maybe someone from the GRAIN handling industry or similar could add some expert advise here. ■

Try BM&M in Canada. Their screeners are very common in the American wood industry. ■