How to select Anionic Polyacrylamide for mining slurry?
2026-04-14 10:21:32
Selecting the right Anionic Polyacrylamide(APAM)for mining slurry depends on mineral type,particle size,pH,slurry concentration,and dewatering equipment.Below is the industrial selection standard for mining applications.
1.Based on mineral type
Inorganic minerals(iron ore,copper,gold,zinc,bauxite,coal,sand&gravel)
Use high molecular weight(12–25 million)+high degree of hydrolysis(25–35%)APAM.
Clay-rich or fine silt slurry
Choose ultra-high molecular weight with moderate to high anionicity for stronger bridging.
2.Based on slurry pH
Neutral to alkaline(pH 7–11)
Standard 25–30%hydrolysis APAM performs best.
Weakly acidic slurry
Select low hydrolysis(15–20%)APAM for better stability.
3.Based on solid concentration&particle size
High concentration/coarse particles
Medium–high molecular weight,fast settling type.
Low concentration/ultra-fine particles(slime ore)
Ultra-high molecular weight,high charge density to capture fine particles.
4.Based on dewatering equipment
Thickeners/settling tanks
High molecular weight APAM for fast,large flocs and clear overflow.
Filter presses,belt filters,centrifuges
High molecular weight+tough floc structure to avoid breaking during dewatering.
Tailings dry stacking
Ultra-high molecular weight,high hydrolysis grade for low moisture content.
5.General selection principle
Always do a beaker settling test with on-site slurry to compare:
Floc formation speed
Settling rate
Clarity of overflow
Moisture content after dewatering
References
GB/T 7714
Zhang H,Liu T,Wang Y.Selection and application of anionic polyacrylamide in mining slurry dewatering.Mineral Processing and Metallurgy,2021,40(3):41–45.
MLA
Zhang,H.,Liu,T.,&Wang,Y."Selection and Application of Anionic Polyacrylamide in Mining Slurry Dewatering."Mineral Processing and Metallurgy,vol.40,no.3,2021,pp.41–45.
APA
Zhang,H.,Liu,T.,&Wang,Y.(2021).Selection and application of anionic polyacrylamide in mining slurry dewatering.Mineral Processing and Metallurgy,40(3),41–45.
