Magnafloc 919 Equivalent — Anionic PAM for Mineral Processing
The archived Ciba Specialty Chemicals technical sheet (February 2004) identifies Magnafloc 919 as an ultra-high-molecular-weight anionic polyacrylamide granular powder for coal, copper and iron-ore tailings clarification, gold cyanidation CCD washing and mineral-slurry centrifugation. The sheet does not state a charge-density figure. ChinaPAM routes 919 replacement inquiries through two named grades: CNfloc 1054V at very high molecular weight and high charge for the majority of mineral thickener and tailings duty, and CNfloc 1082 at very high molecular weight and low charge where low-charge bridging governs the slurry. The settling test decides which route wins on your process.
Head-to-Head Comparison
Side-by-side data: Our equivalent vs Ciba Magnafloc 919
| Parameter | Our Equivalent | Ciba Magnafloc 919 |
|---|---|---|
| Product form | Anionic PAM granular powder | Anionic PAM granular powder |
| Molecular-weight position | Very high (1054V and 1082 on ChinaPAM scale) | Ultra high as described in the Ciba technical sheet |
| Charge position | High (1054V) or Low (1082) on ChinaPAM scale; selected by slurry test | Not stated in the archived Ciba technical sheet |
| Primary mineral duties | Tailings clarification, CCD washing, thickener and centrifugation duty | Coal/copper/iron-ore tailings, gold CCD and centrifugation |
| Recommended stock make-up | 1–3 g/L | 0.25–0.5% (2.5–5 g/L) in the February 2004 sheet |
| Maximum stock make-up | 5 g/L | 5 g/L in the February 2004 sheet |
| Selection route | Two grades ranked on the buyer's slurry test | Technical-service selection stated by Ciba |
| Documents | Selected-grade TDS plus current-batch COA at quotation | Archived February 2004 technical sheet |
Specifications
| Primary Route | CNfloc 1054V — Very High MW / High charge |
| Secondary Route | CNfloc 1082 — Very High MW / Low charge (bridging duty) |
| Positioned Against | Ciba Magnafloc 919 |
| Type | Anionic polyacrylamide powder |
| Recommended Make-up | 1–3 g/L |
| Maximum Make-up | 5 g/L |
| Dissolution Time | ≤60 min |
| Packaging | 25 kg PP woven bags + PE liner |
Key Features
- Two named ChinaPAM routes ranked by charge demand, not by assumed equivalence
- Competitor duty traced to the archived Ciba technical sheet dated February 2004
- Coal, copper and iron-ore tailings, gold CCD washing and mineral centrifugation covered
- Selected-grade TDS and current-batch COA issued with quotation
- Free sample available for cylinder settling or jar-test comparison
Applications
- Coal tailings clarification
- Copper and iron-ore tailings clarification
- Gold cyanidation CCD washing
- Mineral slurry centrifugation
- General mineral thickener feed flocculation
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What the Ciba 2004 Technical Sheet Confirms
The archived Ciba Specialty Chemicals technical sheet, dated February 2004, gives a clear product identity: Magnafloc 919 is an ultra-high-molecular-weight anionic polyacrylamide supplied as an off-white granular powder. The document names five principal duties — coal, copper and iron-ore tailings clarification, gold cyanidation CCD washing, and centrifugation of mineral slurries including clays.
The sheet reports 98% below 1000 µm particle size, 0.75 g/cm³ bulk density, pH 7.0 for a 1% solution, and a normal dry-substrate dosage range of 2–200 g/t. Stock-solution concentration is stated as 0.25–0.5% maximum. Those are the published figures. The sheet does not state a charge-density descriptor. That missing field is the reason this page offers two ChinaPAM routes rather than one cross-reference.
Two Named Routes, One Slurry Decision
CNfloc 1054V is the primary route. It sits at very high molecular weight and high charge on the ChinaPAM scale. High-charge anionic grades anchor strongly to the mineral surface through electrostatic interaction and deliver fast initial settling on most copper, iron-ore and coal tailings circuits. Start here when 919 is being used on standard thickener or tailings duty.
CNfloc 1082 is the low-charge bridging route. It sits at very high molecular weight and low charge. Low-charge grades perform where the slurry carries enough natural surface charge that additional electrostatic anchoring from a high-charge polymer causes over-flocculation or restabilisation, and where the duty needs long bridging chains rather than charge-driven attachment. Include 1082 in the trial when 1054V over-doses at low addition rate or when the settling curve flattens unexpectedly.
The two routes are intentionally different. They cover the charge range most commonly encountered in the duties the Ciba sheet lists. The settling test on your slurry identifies the ChinaPAM route that fits your process.
| Observed duty or trial result | Primary route | Secondary route trigger | Decision metric |
|---|---|---|---|
| Standard mineral thickener or tailings | CNfloc 1054V | Add 1082 if clarity ceiling at optimum dose | Settling rate and supernatant clarity |
| Coal preparation circuit | CNfloc 1054V | Add 1082 if overdose response is flat | Compacted-bed height and clarity |
| Gold CCD washing | CNfloc 1054V | Add 1082 if wash-stage clarity limits recovery | Floc integrity after dilution |
| High-shear centrifugation feed | CNfloc 1054V | Add 1082 for stronger bridging under shear | Floc recovery after controlled shear |
| Slurry with high natural surface charge | CNfloc 1082 | — | Overdose curve and restabilisation onset |
Trial Failure Modes to Control
Incomplete hydration creates false underperformance. Powder added too quickly forms fisheyes: dry cores wrapped in hydrated gel. Keep make-up concentration inside the ChinaPAM range, disperse powder gradually into the vortex, and use the full dissolution period before comparing grades.
A high-shear pump between the addition point and the settling stage can erase a good polymer choice by breaking the formed floc. If the bench result is strong but the plant result collapses, move the addition point downstream of the highest-shear zone where practical.
Recording only the largest visible floc misses the dose-response curve. The winning dose is the lowest stable point that meets settling rate, clarity and underflow targets together — overdosing often improves initial floc size while worsening final clarity or bed compaction.
Dosage Guide
Prepare ChinaPAM powder at 1–3 g/L, never above 5 g/L, and allow up to 60 minutes for complete dissolution. Start the settling test at the incumbent Magnafloc 919 dose, then bracket lower and higher doses to locate the operating window for the selected route.
Frequently Asked Questions — Magnafloc 919 Equivalent — Anionic PAM for Mineral Processing
Which ChinaPAM grade should I start with for Magnafloc 919 duty?
Start with CNfloc 1054V. It sits at very high molecular weight and high charge on the ChinaPAM scale and covers the majority of mineral thickener and tailings duties where Ciba 919 was specified. Add CNfloc 1082 to the trial when the slurry responds better to low-charge bridging than to charge-driven flocculation — both are real catalogue grades and the settling test decides which route wins.
What does the original Magnafloc 919 sheet actually confirm?
The archived Ciba technical sheet identifies Magnafloc 919 as an ultra-high-molecular-weight anionic polyacrylamide granular powder. It lists coal, copper and iron-ore tailings clarification, gold cyanidation CCD washing and mineral-slurry centrifugation as principal uses. It reports 0.25–0.5% maximum stock concentration and a dosage range of 2–200 g/t. It does not state a charge-density figure, so this page does not invent one.
How should the two routes be trialled?
Prepare each ChinaPAM grade at 1–3 g/L, never above 5 g/L, and allow up to 60 minutes for complete dissolution. Run equal-dose cylinder tests against the incumbent product, then rank initial settling rate, supernatant clarity, compacted-bed height and floc response to gentle shear. The route that clears the incumbent on those four metrics at the lowest stable dose is the one we supply.
Why does ChinaPAM offer two routes rather than one?
Because the Ciba sheet does not publish charge density, ChinaPAM uses a two-route selection: CNfloc 1054V for the high-charge mineral-slurry position and CNfloc 1082 for low-charge bridging. The slurry test identifies the route for your process water, solids loading and circuit.
What documents come with the quotation?
The quotation names the selected ChinaPAM grade. We provide that grade's available TDS and the current-batch COA, together with SDS and the free sample test protocol.
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Trademark notice. Ciba Magnafloc 919 and all other third-party product and brand names on this page are trademarks or registered trademarks of their respective owners. Henan Jinghua New Material Technology Co., Ltd. is not affiliated with, endorsed by, sponsored by or authorised by those owners, and no such relationship is implied. Those names are used here for the sole purpose of identifying the products our grades are compared against, which is necessary to describe what we supply. Our products are independently manufactured and are not licensed copies. Grade descriptors quoted for third-party products are taken from each manufacturer’s own published literature and follow that manufacturer’s own scale; we do not publish figures those manufacturers do not publish. Performance on your process should be confirmed by jar test or CST test before any change of supply.