Wear-Resistant Structural Design Two Phase Decanter Centrifuge for Metal Finishing and Electronics Sludge
Description
Metal Finishing & Electronics Sludge Decanter is designed for continuous solid-liquid separation of metal hydroxide sludge, inorganic fine sludge, and heavy-metal-containing wastewater sludge.
For most metal finishing and electronics sludge applications, the recommended configuration is a two-phase decanter centrifuge because the main target is to separate solid sludge from wastewater after neutralization, precipitation, and flocculation.
Best-Fit Applications
- Acid pickling sludge dewatering
- Phosphating sludge treatment
- PCB copper-containing sludge dewatering
- Semiconductor CMP wastewater slurry treatment
- PV silicon wafer cutting slurry separation
- Lithium battery material sludge separation
- Rare earth precipitation sludge treatment
- Metal hydroxide sludge dewatering
Typical materials include metal hydroxides, inorganic fine particles, ultra-fine abrasive particles, silicon powder slurry, suspended solids, precipitated sludge, copper-containing sludge, CMP slurry, and industrial wastewater.
Why Two-Phase is Recommended
- The feed mainly contains solid sludge + liquid wastewater.
- It is suitable for sludge formed after neutralization, precipitation, and flocculation.
- It helps reduce sludge volume and lower disposal cost.
When Another Configuration May Be Considered
- If the feed contains oil, grease, or organic solvents.
- If the sludge contains extremely abrasive particles.
- If the process requires very high liquid clarity after centrifugation, downstream filtration may be needed.
How the Decanter Centrifuge Works in This Application
- Metal-containing sludge enters the rotating bowl through the feed pipe.
- Under centrifugal force, heavier metal hydroxides and inorganic particles move outward.
- The screw conveyor continuously pushes the separated solids toward the discharge end.
- The clarified liquid phase is discharged through the liquid outlet.
- The discharged sludge cake is collected for further treatment, stabilization, or disposal.
Technical Parameter
| Model |
Diameter (mm) |
Length (mm) |
Length-to-diameter rate |
G force |
Max solid discharge (m³/h) |
Weight (kg) |
Dimension (L×W×H) (mm) |
| PDC-10 |
250 |
1000 |
4 |
4080 |
0.4 |
1000 |
2410×800×1080 |
| PDC-12 |
4200 |
1350 |
4 |
3500 |
0.6 |
1200 |
2610×800×1080 |
| PDC-12 |
4200 |
1350 |
4.5 |
3180 |
1.2 |
1800 |
3495×840×1180 |
| PDC-18 |
4000 |
1600 |
4.5 |
3180 |
1.2 |
3200 |
3497×1020×1385 |
| PDC-18 |
450 |
2150 |
4 |
2500 |
2 |
3800 |
4447×1080×1385 |
| PDC-20 |
400 |
2250 |
4.5 |
2500 |
3.5 |
4000 |
4580×1140×1470 |
| PDC-21 |
530 |
2280 |
4.3 |
2500 |
5 |
5000 |
4924×1170×1540 |
| PDC-26 |
655 |
2800 |
4.3 |
2270 |
8 |
7000 |
4300×1900×1350 |
Typical Feed Conditions and Design Considerations
| Item |
Typical Range / What to Confirm |
| Feed material |
Pickling sludge, phosphating sludge, PCB sludge, battery material sludge, rare earth precipitation sludge |
| Solids content |
Usually 2–15% |
| Oil content |
Usually low; confirm if oil or solvent exists |
| Particle characteristics |
Fine, inorganic, precipitated, sometimes abrasive |
| Viscosity |
Low to medium |
| Temperature |
Usually 20–70°C |
| Corrosion risk |
Medium to high; confirm pH, chloride, acid/alkali residue |
| Capacity requirement |
Confirm by m³/h or tons/day |
| Target result |
Sludge dewatering, lower moisture, lower SS, lower disposal volume |
Main Advantages in Electronics Sludge
- Continuous automatic operation
- Suitable for metal hydroxide and inorganic sludge
- Reduced sludge volume
- Lower sludge disposal cost
- Stable separation after flocculation
- Optional anti-corrosion material design
- Optional wear-resistant protection for abrasive sludge
- Compact footprint compared with some traditional dewatering systems
Expected Results
With proper neutralization, precipitation, flocculation, and stable feeding, this decanter centrifuge can typically achieve:
- 75–95% solid capture rate
- 60–90% suspended solids reduction
- 20–40% cake solids content
- 60–80% final cake moisture
- 25–55% sludge volume reduction
- 20–45% lower sludge handling / disposal load
- 16–24 hours/day continuous operation
Actual results depend on sludge composition, particle size, floc strength, pH, chemical dosing, and corrosion or abrasion level.
FAQ
Is this machine suitable for PCB sludge?
Yes. It can be used for PCB copper-containing sludge after proper chemical precipitation and flocculation.
Is polymer dosing required?
Usually yes. Polymer dosing helps improve floc formation, solid capture, and cake dryness.
What material is recommended?
Depending on corrosion risk, options may include SUS304, SUS316L, duplex stainless steel, or special anti-corrosion material design.
Can it handle abrasive inorganic sludge?
Yes, but wear protection should be selected according to the actual abrasive content and particle hardness.
What information is needed for model selection?
Please provide feed material, capacity, solids content, pH, chloride level, temperature, particle characteristics, target cake moisture, and corrosion or abrasion requirements.
Send Us Your Project Data
To recommend a suitable model, please share:
- Feed material name
- Capacity requirement
- Solids content
- pH value
- Temperature
- Heavy metal type
- Corrosion condition
- Abrasion condition
- Target cake moisture
- Polymer dosing condition
- Operating hours
- Site voltage or control preference
Our engineering team can suggest a suitable two-phase decanter centrifuge configuration for your metal finishing or electronics sludge dewatering project.
Contact Peony for Partnership
If you have local customer channels or project resources in metal finishing wastewater, PCB sludge, semiconductor CMP slurry, PV silicon wafer cutting slurry, lithium battery material sludge, rare earth precipitation sludge, or heavy metal wastewater treatment, peony welcomes cooperation.
Send us your target market, customer type, project background, and cooperation proposal. Our team will evaluate the opportunity and provide technical and commercial support for suitable projects.
