P21.3
Dry Mixing/Blending Process
Procedure 34 of 40 · Chapter 21 · §21.2.1
1 table 0 notes
Table 1
| Parameter | Ribbon Blender | V-Cone Mixer | QC Method | Acceptance Criterion |
|---|---|---|---|---|
| Batch size range | 50–5,000 kg | 10–1,000 kg | Weighing | ±1% of target |
| Loading factor | 0.4–0.7 | 0.5–0.7 | Visual fill level | Within marked lines |
| Mixer speed | 30–60 RPM | 10–25 RPM | Tachometer | ±5% of setpoint |
| Mixing time | 15–30 min | 10–20 min | Timer | Recorded in batch record |
| Homogeneity CV | — | — | Tracer assay (surfactant or brightener) | ≤5% (ribbon); ≤3% (paddle) |
| Bulk density (after mixing) | — | — | Gravimetric (1 L cylinder) | Target ±5% |
| Moisture content | — | — | Karl Fischer or gravimetric | ≤5% w/w |
| Residual after discharge | — | — | Weighing | <0.5% of batch |