Wet vs Dry Re-Granulation of Porcelain Tile Powder

Re-granulation turns fine, broken or recycled porcelain tile powder back into a pressable feed. The choice between wet and dry re-granulation affects flow, die filling, moisture spread, dust and green tile defects.

Quick choice

Wet re-granulation

Wet re-granulation adds controlled water or binder solution while mixing fines, broken granules or recycled powder. The wet mass forms new agglomerates, then the plant dries and screens them back to the press-feed range.

Use this route when fines content is high, dust is a problem, or the powder has lost granule strength. The risk is moisture variation. If drying is uneven, the press sees density variation, lamination or size drift.

Dry re-granulation

Dry re-granulation uses mechanical mixing, compaction, crushing or screening without adding a major water load. It suits powder that already has usable moisture but needs better size distribution or fewer loose fines.

Use this route for small corrections and closed-loop reuse where the powder is close to specification. It will not fix badly degraded powder, over-dry powder or powder with weak binder distribution.

Comparison table

Press-floor checks

• Measure moisture before and after re-granulation.
• Check sieve distribution, especially fines below the plant limit.
• Track apparent density and flow time before feeding the press.
• Inspect green tiles for lamination, edge cracks and density bands.
• Run fired-size and water-absorption checks before approving production use.

Bottom line

Use wet re-granulation when powder needs real rebuilding. Use dry re-granulation when the powder is close to usable and only needs a controlled size correction. In both cases, approve the route by press behaviour, not by sieve data alone.