PDADMAC Liquid Coagulant for Coal Washery Wastewater Recycling
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Product Overview
PDADMAC, also known as PolyDADMAC or Poly(dimethyl diallyl ammonium chloride), is a water-soluble cationic polymer with strong charge neutralization ability. It is widely used as a coagulant and flocculation aid in industrial wastewater treatment, mining wastewater treatment, sludge dewatering, and solid-liquid separation processes.
Coal washery wastewater typically contains fine coal particles, clay minerals, inorganic solids, and suspended impurities. These particles usually carry negative surface charges, making natural settling difficult. PDADMAC works by neutralizing these charges and promoting the formation of larger and stronger flocs.
Bluwat PDADMAC liquid coagulant helps coal processing plants improve wastewater clarification, reduce suspended solids concentration, and increase the reuse rate of recycled process water.
Application in Coal Washery Wastewater Recycling
Coal washing plants consume large amounts of water during coal separation and cleaning processes. Recycling this water is essential for reducing fresh water consumption and improving environmental compliance.
PDADMAC is commonly applied in coal washery wastewater systems for:
By improving floc formation and sedimentation, PDADMAC helps produce clearer recycled water that can be returned to the coal washing process.
Key Benefits
High Charge Density for Rapid Coagulation
PDADMAC provides strong cationic charge, allowing rapid neutralization of negatively charged coal particles, clay, and suspended solids.
Improved Water Recycling Efficiency
The product helps reduce turbidity and suspended solids in coal washery wastewater, supporting higher recycling rates and lower fresh water consumption.
Faster Solid-Liquid Separation
PDADMAC promotes the formation of compact flocs, improving settling performance in clarification tanks and thickeners.
Reduced Sludge Volume
The optimized use of PDADMAC can improve sludge dewatering performance and help reduce water content in separated solids.
Flexible Molecular Weight Selection
Different viscosity and molecular weight grades are available to match different coal slurry characteristics and treatment equipment.
Compatible with Other Coagulants
PDADMAC can be used alone or combined with inorganic coagulants such as Polyaluminium Chloride (PAC) for enhanced wastewater treatment performance.
Working Principle in Coal Washery Treatment
Coal washery wastewater treatment normally depends on effective destabilization and aggregation of fine particles.
PDADMAC treatment mechanism:
- 1 Negative charges on coal particles are neutralized by PDADMAC.
- 2 Fine particles become destabilized and begin to aggregate.
- 3 Larger flocs are formed through polymer bridging.
- 4 Flocs settle faster in clarification equipment.
- 5 Cleaner water can be recycled back to coal washing operations. </
Recommended Treatment Process
Product Specifications
| Product Name | BLU DA Series PDADMAC Liquid Coagulant |
| Chemical Name | Poly(dimethyl diallylammonium chloride) |
| Short Name | PDADMAC / PolyDADMAC |
| CAS Number | 26062-79-3 |
| Appearance | Colorless to light yellow liquid |
| Solid Content | 20–50% |
| pH Value | 3.0–7.0 |
| Specific Gravity at 25°C | 1.01–1.10 |
| Charge Type | Cationic |
| Molecular Weight | Low to very high molecular weight grades available |
| Package | 25L plastic drum 200L plastic drum 1000L IBC drum |
Available Grades
DA 20 Series
DA 40 Series
DA 45 Series
DA 50 Series
Application Method
For coal washery wastewater recycling, PDADMAC dosage should be optimized according to:
When used alone, PDADMAC should be diluted before application. The recommended dilution concentration is generally 0.5–5% based on solid content.
The optimum dosage should be determined by jar testing. Proper mixing conditions are important to achieve uniform chemical dispersion and prevent floc breakage.
Why Choose Bluwat PDADMAC?
Bluwat Chemicals specializes in manufacturing cationic polymers, coagulants, and flocculants for industrial wastewater treatment.
Advantages of Bluwat PDADMAC:
FAQ
PDADMAC is used to coagulate and flocculate fine coal particles and suspended solids, improving clarification, sedimentation, and recycled water quality.
Yes. PDADMAC helps remove suspended solids and reduce turbidity, allowing treated water to be reused in coal washing processes.
PDADMAC mainly provides charge neutralization and coagulation, while PAM mainly improves floc growth through polymer bridging. They can also be used together depending on wastewater characteristics.
In some applications, PDADMAC can reduce or replace alum and ferric salts. Actual performance depends on wastewater conditions and treatment targets.
Selection depends on coal slurry properties, solids concentration, equipment type, and required clarification performance. Laboratory jar testing is recommended.