Polyamine Coagulant for Coal Washing Wastewater and Fine Slurry Separation
Product Overview
Coal washing circuits often contain very fine clay and coal particles that remain suspended and recycle through the plant. Polyamine can neutralize surface charge before an anionic or cationic PAM builds settleable flocs. This two-stage approach can support clearer overflow and more stable process-water reuse.
Applicable to clarifiers, thickeners and selected flotation or DAF systems handling fine coal slurry. It should be tested with site water because clay mineralogy, reagent carryover and solids concentration strongly affect demand.
Application Advantages
- Rapid destabilization of persistent fine particles.
- Supports larger and stronger flocs when followed by a compatible PAM.
- May improve overflow clarity and reduce fine-solids recirculation.
- Liquid feed responds quickly to changing solids load.
Typical Product Information
| Item | Typical information |
| Product family | BLU AM series liquid cationic polyamine |
| Appearance | Clear to light-colored liquid; confirm selected grade |
| Ionic character | Cationic |
| Typical solids range | 30-50%, depending on grade |
| Solubility | Water soluble |
| Function | Primary coagulant, coagulant aid and charge neutralizer |
| Packaging | Common options: 25 L drum, 200 L drum or 1000 L IBC |
Note: Values above describe the BLU AM product family. The final specification, viscosity, pH, shelf life and packaging must follow the selected grade's current TDS, SDS, COA and quotation.
Recommended Treatment Approach
Collect representative slurry across the operating shift. Disperse polyamine under rapid mixing, then reduce shear before adding the selected PAM. Replicate actual thickener dilution and observe settling rate, supernatant clarity, floc structure and underflow behavior.
Dosage Optimization
Avoid selecting only on fastest initial settling. A very high dose can create fragile floc, cloudy overflow or poor underflow handling. Evaluate reagent cost together with water recovery and downstream dewatering.
Handling and Storage
Use corrosion-compatible metering equipment and prevent contamination between chemical tanks. If dilution is required, add product to clean water with moderate agitation and verify solution stability before continuous use. Keep containers sealed and follow the grade-specific SDS and TDS for personal protection, storage temperature and spill response.
Frequently Asked Questions
Why use polyamine before PAM?
Polyamine reduces electrostatic stability of fine particles. PAM then bridges destabilized particles into larger flocs suitable for separation.
Which PAM type should follow?
The optimum ionic type and molecular weight depend on coal, clay and water chemistry. Anionic PAM is common, but laboratory screening is required.
Can polyamine improve water reuse?
Clearer overflow can reduce fine-solid recirculation, but reuse quality also depends on dissolved salts, surfactants and other process contaminants.
Information for Product Selection
For a useful sample recommendation, provide the industry and wastewater source, pH, temperature, turbidity or TSS, color or COD where relevant, current chemicals and doses, treatment flow, separator type, sludge issue and required outlet quality. Bluwat can then shortlist suitable BLU AM grades for comparative testing.