High Charge PolyDADMAC for Phosphate Rock Slime Dewatering
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Product Overview
PolyDADMAC, also known as PDADMAC or Poly(dimethyl diallyl ammonium chloride), is a high charge density cationic polymer widely used in mining wastewater treatment, mineral processing, sludge dewatering, and industrial clarification.
In phosphate rock beneficiation, slime wastewater often contains ultrafine phosphate particles, clay minerals, silica, carbonate impurities, and suspended solids. These fine particles are difficult to settle naturally because of their small particle size and stable surface charge. Poor slime separation can lead to high turbidity, slow thickening, poor dewatering performance, and lower process water recovery.
Bluwat High Charge PolyDADMAC helps neutralize negatively charged slime particles and promotes the formation of larger, stronger flocs. This improves solid-liquid separation in phosphate slime thickening, clarification, settling ponds, and dewatering systems.
Application in Phosphate Rock Slime Dewatering
Phosphate beneficiation plants need efficient slime management to improve water recycling, reduce tailings pond load, and support stable mineral processing operation.
High Charge PolyDADMAC can be used in:
Key Benefits
High Charge Density for Fine Slime Treatment
PolyDADMAC provides strong cationic charge to neutralize negatively charged phosphate slime particles, clay, and suspended mineral solids. This improves particle destabilization and coagulation efficiency.
Faster Slime Settling
The product promotes the formation of larger and denser flocs, helping fine slime particles settle faster in thickeners, clarifiers, or settling ponds.
Better Dewatering Performance
PolyDADMAC improves floc structure and supports better water release during phosphate slime dewatering, reducing the load on mechanical dewatering equipment.
Improved Process Water Recovery
By reducing suspended solids and turbidity, PolyDADMAC helps produce clearer overflow water that can be recycled back into phosphate beneficiation processes.
Flexible Grade Selection
Bluwat offers 20%, 40%, 45%, and 50% liquid PolyDADMAC grades with different molecular weight and viscosity options to match different phosphate slime conditions.
Compatible with Other Flocculants
PolyDADMAC can be used alone or together with PAC, PAM, or other treatment chemicals when stronger settling, clarification, or dewatering performance is required.
Easy Liquid Dosing
Liquid PolyDADMAC is easy to dilute, pump, and dose continuously, making it suitable for phosphate processing plants and tailings water treatment systems.
Working Principle
High Charge PolyDADMAC improves phosphate rock slime dewatering mainly through charge neutralization and floc formation.
Treatment mechanism:
- Fine phosphate slime particles and clay minerals carry negative surface charges.
- PolyDADMAC provides positive charge to neutralize these particles.
- Destabilized particles aggregate into larger flocs.
- Larger flocs settle faster and release water more easily.
- Clarified water can be recovered for reuse.
- Concentrated slime can be sent for dewatering or tailings handling.
Recommended Treatment Process
Product Specifications
| Product Name | BLU DA Series High Charge PolyDADMAC Liquid |
| Chemical Name | Poly(dimethyl diallylammonium chloride) |
| Short Name | PolyDADMAC / PDADMAC |
| CAS Number | 26062-79-3 |
| Appearance | Colorless to light yellow liquid |
| Solid Content | 20–50% |
| pH Value | 3.0–7.0 |
| Specific Gravity (25°C) | 1.01–1.10 |
| Charge Type | Cationic |
| Molecular Weight | Low, medium, high, and very high grades available |
| Brookfield Viscosity | Below 200 cps to above 15000 cps |
| Package | 25L / 200L / 1000L IBC drum |
Available PolyDADMAC Liquid Grades
DA 20% Series
DA 201: Low MW, <200 cps
DA 202: Medium MW, 200–700 cps
DA 203: Medium MW, 700–1000 cps
DA 204: High MW, 1000–2000 cps
DA 205: Very High MW, 2000–3000 cps
DA 40% Series
DA 401-403: Low to Med MW, <3000 cps
DA 404-405: High MW, 3000–8000 cps
DA 406-408: Very High MW, up to >15000 cps
DA 50% Series
DA 501-502: Low-Med MW, 1000–3000 cps
DA 503-504: High MW, 3000–8000 cps
DA 505-507: Very High MW, up to >15000 cps
Application Method & Selection
For phosphate rock slime dewatering, PolyDADMAC should be selected according to slime concentration, particle size distribution, mineral composition, pH condition, and treatment equipment.
When used alone, PolyDADMAC is normally diluted to 0.5–5% concentration based on solid content before dosing. The optimum dosage should be confirmed by jar testing and plant trial.