Intermediate treatment · Model FSJZ / FSJQ
Impact Detacher
Breaks up flakes so the sifter can actually do its job.
- 60+ years manufacturing
- 10–500 t/d capacity range
- 100+ patents
- Turnkey commissioning
What it does
Smooth-roll reduction produces flat flakes that blind the sifter and lock flour inside. An impact detacher throws the stock against pins at ~2,900 rpm, breaking the flakes apart without grinding the bran any finer. The result is a measurable lift in sifting efficiency and flour yield.
Technical parameters
Nominal values at standard conditions. Confirm final specification on the order drawing.
| Parameter | FSJZ43 (standard) | FSJQ51 (intensive) | |||||
|---|---|---|---|---|---|---|---|
| Capacity (t/h) | 1.5 | 2.5 | 4 | 1 | 1.7 | 2.8 | 4 |
| Rotor speed (rpm) | 2,830 | 2,890 | 2,900 | 2,910 | 2,910 | 2,910 | 2,910 |
| Rotor diameter (mm) | 430 | 430 | 430 | 510 | 510 | 510 | 510 |
| Cylindrical pins | 80 | 80 | 80 | 192 | 192 | 192 | 192 |
| Square pins | — | — | — | 64 | 64 | 64 | 64 |
| Motor power | 3 kW | 4 kW | 5.5 kW | 5.5 kW | 7.5 kW | 11 kW | 15 kW |
| Dimensions (mm) | 576 × 650 × 642 | 576 × 650 × 642 |
Selection guidance
The FSJQ intensive model is used where the stock is heavily flaked or where a second function is required — impact disinfestation. Standard FSJZ is sufficient for normal reduction streams.
Maintenance
Pins wear on the leading face; rotate the rotor plate 180° at mid-life, then replace. Check rotor balance after any pin change — imbalance destroys bearings within weeks.
Selection cross-check
Bran recovery vs stock detachment
These two are often confused because both sit at the end of the milling section. They do different jobs and are not alternatives.
This machine
Impact Detacher
FSJZ / FSJQ
Choose it when
Between reduction passages where stock leaves the roll mill as flakes and agglomerates. Detaching before sifting lets the sifter do its job instead of screening lumps.
Watch out for
Excess speed or worn pins damage starch, raising starch damage and hurting biscuit and cake flours. It is a conditioning machine, not a grinder.
Alternative
Bran Finisher
FPDW / FBZD
Choose it when
Whenever bran is sold as a by-product. Recovers adhering flour from bran, typically 1–3% of intake — which is 1–3 points of extraction that would otherwise leave the plant as low-value bran.
Watch out for
Over-aggressive finishing puts fine bran into the flour and raises ash. Screen condition is critical and needs weekly inspection.
Open Bran Finisher →Decision rule
They are complementary, not alternatives: detachers go between rolls and sifters, bran finishers go after the last break. Fit both in any plant above 40 t/d.
Answers
Frequently asked questions
Straight answers to the questions engineers and mill owners actually ask us during plant sizing. If your case is not covered, send the wheat specification and your target tonnage.
Ask an engineer →- Where in the flow sheet does an impact detacher go?
- Immediately after the smooth-roll reduction mills, before the sifter. One unit can serve a group of mills via a common collecting conveyor.
- Can impact detaching kill insects?
- Yes — the centrifugal impact is used as a physical disinfestation step in some markets, though regulatory acceptance varies. It is a useful additional barrier, not a replacement for hygiene control.
Next step
Send your tonnage. Get a flow sheet in 12 working hours.
Send us: daily capacity target, wheat type and quality, available building dimensions, and local power supply. We reply within 12 working hours with a preliminary flow sheet, equipment list and budget range — no obligation.