A tunnelling-slurry polymer purchase must identify the treatment stream and distinguish solids removal from the properties required elsewhere in the slurry circuit. Excavated fines and conditioning agents can change response. Anionic PAM is a candidate for a tested separation duty, not an automatic solution for every bentonite-containing material.
Define the separation point and circuit boundary
Record which stream is being treated, the fines and solids range, relevant conditioning agents and water chemistry. Explain whether recovered water returns to a process with specific rheology or quality requirements. A treatment decision should not modify the active slurry properties by an unreviewed assumption. Provide representative normal and difficult samples under the site procedure, rather than a simplified mineral mixture that omits relevant additives.
Screen the formed solids under controlled chemistry
Keep upstream treatment fixed while comparing candidates and dose. Where coagulant is used, include its baseline so polymer contribution is interpretable. Anionic charge alone does not overcome every dispersant or clay condition. The selection guide helps organize water, particle and chemical effects. A poor response should prompt method and family review, not a universal recommendation for stronger anionicity.
Check water and dewatered solids outcomes
Assess clarification, compaction and the installed downstream dewatering duty. If a press is used, record filtrate, cake release and the practical cycle. Reuse compatibility remains a separate process check. The mineral-filter purchasing criteria are useful for that residual route. Do not infer excavation performance, ground-support suitability or any civil-engineering outcome from a solids-separation test.
Buy for the demonstrated campaign
Define candidate identity, treatment stage, preparation and tested feed range in the supply approval. Include changes expected as the excavated material varies, with a procedure for reviewing a new condition. Confirm package handling, protected storage and supplier-acknowledged delivery arrangements. A short project trial should not authorize unrecorded substitution or use at another process point simply because both applications share the word slurry.
Record the purchase decision
Complete the following checks with actual measurements, observations or an agreed document reference. Keep an untested condition visible as a limitation rather than assuming equivalence. The candidate code, sample identity and trial method must remain attached to the decision so purchasing and operations approve the same product and duty.
| Check | Evidence | Order decision |
|---|---|---|
| Boundary | Treatment point and return-water destination | Polymer use remains within its reviewed process role |
| Feed range | Excavated fines and conditioning chemistry | Trial represents campaign variability |
| Result | Separator and reuse evidence | No unsupported excavation or engineering claim |
Send a useful sample and quotation enquiry
Send treatment-stream identity, excavated fines range, conditioning agents, solids and water data, and the separation equipment. Include reuse restrictions, package-handling conditions and project demand. Identify the expected campaign change that would require another sample review.
Include quantity, packaging preference and destination separately from the technical approval. Use the anionic PAM sample worksheet to define the candidate screen and confirm quality documents and delivered supply scope for the selected identity. Gongyi Xinqi Polymer Co., Ltd. can review the requirements. Availability, commercial terms and application suitability require confirmation; a process name does not establish a universal dose or guaranteed operating result.
Request a focused sample review
Send solids, water, separator and purchasing requirements for this duty.