Frequently Asked Questions

Anionic PAM is for mineral-rich wastewater — mining, sand washing, coal washing — where particles carry negative charges. Cationic PAM is for organic sludge — municipal WWTP, food processing, papermaking. Nonionic PAM is for highly acidic conditions. Not sure? Request a free sample and we will help you select through jar testing.

PAC (Polyaluminum Chloride) is a coagulant — it neutralizes electrical charges on suspended particles so they come together. PAM (Polyacrylamide) is a flocculant — it bridges those small aggregates into larger, faster-settling flocs. They are often used together: PAC first for coagulation, then PAM for flocculation.

Anionic PAM with molecular weight 17-22 million (SGFLOC A623, A603) for tailings dewatering and mineral processing. Lower MW (12-14M, SGFLOC A608) for coal washing. See our mining industry page for detailed recommendations.

Cationic PAM with 30-50% charge density. Belt press: SGFLOC C8058 (30-35% charge). Centrifuge: SGFLOC C8070 (35-40%). Filter press: SGFLOC C8088 (45-50%). See our municipal wastewater page.

PAC offers 30-50% lower dosage, wider pH tolerance (5-9 vs 6.5-7.5), less sludge production, and better performance in cold water. Residual aluminum is significantly lower. Our drinking water grade PAC meets WHO standards.

Dissolve 1-5g PAM powder in 1 liter of clean water (0.1-0.5% concentration). Use slow mechanical stirring at 100-300 rpm for 60 minutes until fully dissolved. Important: Never use high-speed mixers — they shear the polymer chains and reduce flocculation performance. Use the solution within 24 hours.

The only reliable way is jar testing with your actual wastewater. Typical dosage ranges: Mining tailings 2-10g/ton, municipal sludge 3-8 kg/ton DS, textile 1-5 mg/L after PAC coagulation. We provide free jar test guidance with every sample.

Anionic PAM: 2 days. Cationic PAM: 1 day. After this time, the polymer chains begin to degrade and flocculation performance drops. Always prepare fresh solution daily.

Use clean water with neutral pH (6-8) and low hardness. Avoid water with high iron or dissolved salts — these can interfere with polymer dissolution. Tap water or process water is usually fine.

Store in a cool, dry place at 0-35°C. Keep bags sealed when not in use — PAM absorbs moisture from the air which causes clumping and reduces shelf life. Shelf life: 2 years in unopened bags.

MOQ is 1 metric ton for bulk orders. For testing, we provide free 500g-1kg samples — request a sample here.

Yes. We provide 500g-1kg free samples for jar testing. Our technical team guides you through the test procedure and helps select the optimal product grade. Request a free sample.

We accept T/T (bank transfer), L/C (letter of credit), and PayPal for sample orders. Standard terms: 30% deposit to start production, 70% balance before shipment.

Production: 7-15 days after deposit confirmation. Ocean freight: 7-30 days depending on destination port. Air freight and DHL/FedEx available for urgent or small orders. We ship from Shanghai and Qingdao ports.

Standard: 25kg PE bag with inner plastic liner, 40 bags per pallet. Also available: 500kg and 1000kg jumbo bags. Custom packaging and private labeling available on request.

Molecular weight indicates polymer chain length. Higher MW generally means stronger flocculation and faster settling — but it also means slower dissolution and higher viscosity. For most mining applications, 15-22 million MW is optimal. For some applications, a lower MW with higher charge density works better. The right MW depends on your specific wastewater.

Solid content is the percentage of active polymer in the powder. Our anionic PAM has ≥95% solid content, meaning at least 95% of what you buy is active flocculant. The remaining <5% is moisture and manufacturing byproducts. Higher solid content = better value, less waste.

Charge density measures how many charged sites are on each polymer chain — it affects how strongly the polymer binds to particles. For cationic PAM, higher charge density (35-50%) is better for sludge with high organic content. Too much charge can cause overdosing and restabilization. Jar testing determines the optimal charge density.

Drinking water grade (Al2O3 28-30%): Meets WHO standards for heavy metals — As ≤0.0002%, Pb ≤0.001%, Cd ≤0.0002%, Hg ≤0.00001%. Industrial grade (Al2O3 27-29%): Higher heavy metal tolerance, suitable for wastewater treatment. Both grades perform similarly for coagulation; the difference is purity.

We are a professional manufacturer with ISO 9001, ISO 14001, and ISO 45001 certified production. Our factory produces PAM and PAC directly — no middlemen, factory-direct quality and pricing.