High-Molecular-Weight Anionic Polyacrylamide Emulsion for Mining Tailings Thickening
Product Introduction
Tailings contain a broad particle-size distribution, and ultrafine clay or altered minerals can settle slowly even when coarse solids drop rapidly. Recycled process water, hardness, salinity, and residual flotation reagents can shift performance.
A successful thickener polymer must deliver rapid aggregate growth, clear overflow, and a controllable underflow without creating fragile floc that breaks in the feedwell.
High-molecular-weight anionic polyacrylamide emulsion accelerates mineral tailings settling and supports process-water recovery. Blufloc EA 6520 and EWA 7520 are screened by ore mineralogy, clay content, water chemistry, and thickener duty.
Application Challenges
- Slow settling of ultrafines and clay
- High overflow turbidity limiting water reuse
- Variable ore blend and mineralogy
- Floc damage in the feedwell or rake zone
How the PAM Emulsion Works
Very-high-molecular-weight APAM chains adsorb across mineral particles and form large aggregates. Anionic charge influences chain extension and interaction with mineral surfaces and dissolved ions. Feedwell energy must distribute polymer without destroying growing floc.
Important: The suggested grades below are starting candidates, not a fixed prescription. Final selection and dosage require representative laboratory and plant trials.
Recommended Blufloc Grades
|
Grade |
Base |
Molecular Weight |
Charge |
Suggested Screening Role |
|
EA 6520 |
Oil-based |
Very High |
High anionic |
Primary candidate for demanding tailings thickening |
|
EWA 7520 |
Water-based |
Very High |
Medium anionic |
Water-based comparator for moderate charge and automatic dosing |
The product pages classify the cationic EC and EWC series as high molecular weight and the anionic EA and EWA grades as very high molecular weight. Exact commercial specification limits, active content, viscosity, shelf life, and preparation instructions should be confirmed on the current grade-specific TDS and order specification.
Product Advantages
- Very-high molecular weight for ultrafine bridging
- Potential for faster settling and clearer overflow
- Liquid dosing for continuous thickener operation
- Oil- and water-based options
- Mine-water and ore-specific laboratory screening
Application Process
- Use fresh, representative tailings at operating solids and temperature.
- Record ore blend, particle size, water chemistry, and flotation reagents.
- Screen polymer dose and dilution with repeatable feedwell-like mixing.
- Measure settling rate, supernatant clarity, mud-line compaction, and floc strength.
- Pilot under realistic throughput before changing the full-scale thickener program.
Product Selection Guidance
EA 6520 is the core high-anionic screen for difficult mineral fines. EWA 7520 can perform well where medium anionic charge and water-based handling suit the mineral system. Mineralogy, not product label alone, decides the optimum.
Compare candidates on active polymer mass and total operating cost. Neat-emulsion price per kilogram can be misleading if products differ in activity, preparation efficiency, dose, equipment throughput, cake or underflow quality, and downstream disposal cost.
Operating Indicators to Record
- Initial settling rate
- Overflow turbidity
- Underflow density
- Floc strength
- Polymer grams per ton solids
Troubleshooting Note
Troubleshooting Note: If settlement is fast but overflow remains cloudy, the polymer may be forming mixed floc sizes or fine solids may bypass the feedwell. Check dilution, feedwell distribution, and dose before simply increasing molecular-weight demand.
Packaging, Storage, and Safe Handling
Standard supply options shown on the Blufloc PAM emulsion product pages are 25 kg containers, 200 kg plastic drums, and 1000 kg IBCs. Keep the package sealed in a cool, dry, ventilated area and protect it from direct sunlight, freezing, and excessive heat. Follow the grade-specific TDS and SDS for shelf life, handling limits, and transport classification. Polymer spills can make floors extremely slippery and should be contained and cleaned promptly.
Why Choose Bluwat Chemicals
- More than 25 years of water-treatment chemical manufacturing experience, supported by three modern production plants.
- The company website reports more than 800,000 tons delivered and exports to over 100 countries and regions.
- Factory-direct coordination for grade selection, batch documentation, packaging, and export logistics.
- Laboratory screening support using customer water or sludge samples, with recommendations based on the actual treatment objective.
- TDS, SDS, COA, and applicable certification documents can be supplied for the selected grade and destination market.
For mineral tailings thickening and water recovery, Bluwat can screen adjacent PAM emulsion grades, review preparation and dosing conditions, and help define a plant-trial plan using agreed performance indicators.
Quality Control and Technical Support
- Confirm the required grade specification and order documentation before production and shipment.
- Use representative customer samples to shortlist products under realistic pH, temperature, solids, water chemistry, and shear.
- Supply a clear make-down, dilution, dosing, and scale-up recommendation for the selected grade.
- Review plant-trial data and adjust charge level, dose, addition point, or mixing conditions when necessary.
Frequently Asked Questions
How is mining polymer dose expressed?
It is commonly compared as polymer mass per ton of dry solids, with the exact optimum determined by test.
Does one APAM grade work for every ore?
No. Mineralogy, clay, water chemistry, and reagents can change adsorption and settling.
Why use an emulsion instead of powder?
Emulsion can support rapid continuous make-down, but performance, logistics, and total cost should be compared for the site.
Can APAM improve water recovery?
Better settling and overflow clarity can support recovery, subject to thickener capacity and water-quality requirements.