Copper Mine Transfer Chute Polyurea Wear Lining · Antofagasta
Copper concentrator transfer chutes and hoppers re-lined with 6mm spray polyurea to resist abrasion from coarse ore. Replaced bolt-on AR steel plate, cut changeout downtime, and extended wear-liner life 3x in a high-impact materials-handling circuit.
Customer Type
Copper Mining & Concentrator Operation
Industry
Mining · Materials Handling
Project Scale
14 transfer chutes + 6 hoppers · ~360 m²
Duration
11 days (scheduled shutdown)
The Challenge
A copper concentrator ran bolt-on abrasion-resistant (AR400) steel plate in its ore transfer chutes. Coarse, sharp run-of-mine ore wore plates through in 6-9 months, and each changeout meant confined-space hot work, fastener corrosion, and 1-2 shifts of circuit downtime. The operator needed a seamless, fast-return lining that survived high-impact abrasion without bolt holes as wear-initiation points.
Our Solution
During a scheduled shutdown, chute and hopper interiors were grit-blasted to SP 10 near-white and primed with a polyurea-compatible epoxy tie coat. Applied 6mm hand-sprayed pure polyurea using JYYJ-H-V6 high-pressure unit at 36 MPa with heated hoses for fast gel on vertical and overhead surfaces. Adjustable 1:1~1:2 ratio tuned for the cold Atacama night shift. Seamless monolithic film bridges weld seams and corners where AR plate left gaps.
What Pioneer Delivered
Not just a machine — a matched system, a trained crew on site, and after-sales backing end to end.
- On-site substrate survey with dew-point and steel-temperature monitoring before any spray — so the lining bonds, not blisters.
- A single-source system — JYYJ-H-V6 machine and pure polyurea material matched, tuned and warranted together, not sourced from three suppliers who blame each other.
- A spray crew trained for confined-space chute and hopper geometry and cold night-shift application — the hard part of polyurea is the operator, and we own it.
- Holiday-tested QA and a return-to-service plan built around the mine's scheduled shutdown — the chute went back to ore flow in under 24 hours, not days.
- Ongoing remote support for ratio and temperature tuning, plus re-order of the exact matched material — so the next wear cycle is a phone call, not a new project.
Execution Process
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1 · Surface Preparation
Grit-blast worn chute and hopper interiors to SP 10 near-white metal, stripping scale and worn ridges. A 75-100 µm angular profile is cut into the steel for a strong mechanical key.
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2 · Epoxy Tie Coat & Masking
Flanges and bolt lines are masked, then a polyurea-compatible epoxy primer is applied inside the recoat window for chemical adhesion. Dew point and substrate temperature are logged before spraying the cold night shift.
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3 · Polyurea Spray Application
Hand-spray 6 mm of pure polyurea with the JYYJ-H-V6 at 36 MPa, heated hoses giving a few-second gel for vertical and overhead surfaces. The monolithic film bridges weld seams and corners where bolt-on AR plate previously left gaps.
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4 · Cure & Return to Service
Tack-free within minutes and fully cured in under 24 hours. The lining is holiday-tested for pinholes and thin spots, then the chute is returned to ore flow — no fastener torque-down, no confined-space hot work.
Key Technical Highlights
Coating System
6 mm pure polyurea
Aromatic spray polyurea, 100% solids, zero VOC at application.
Spray Unit
JYYJ-H-V6 @ 36 MPa
High-pressure heated-hose plural-component rig for fast vertical/overhead gel.
Mix Ratio
1:1 ~ 1:2 adjustable
Tuned on-site for the cold Atacama night shift to hold gel and build.
Surface Prep
SP 10 + epoxy tie coat
Near-white blast with 75-100 µm profile, primed for chemical bond.
Wear Performance
3x liner life
Seamless, no bolt holes as wear-initiation points vs AR400 plate.
Return to Service
< 24 hours
Tack-free in minutes; full cure and holiday test within one day.
Project Gallery
On-site application and finished surfaces from this project.
Reference Design Targets
Design and specification targets for this application — not measured results from a specific customer project.
3x
Wear-liner service life
vs bolt-on AR400 plate
-60%
Changeout downtime
spray re-line vs plate replacement
6mm seamless
Lining application
no bolt holes / no seam gaps
<24 h
Return to service
after final coat cure
Why This Model Is Commonly Selected
The JYYJ-H-V6 is a 36 MPa hydraulic machine commonly selected for pure and hybrid polyurea coatings. High pressure and stable proportioning support fast-curing polyurea for seamless waterproofing and lining membranes.
Frequently Asked Questions
Why hydraulic for polyurea?
Does polyurea need special hose/temperature?
Recommended Configuration
- Main proportioning unit
- Fusion-compatible spray gun
- Two transfer pumps
- 15 m heated hose (7 m on D casting models)
- Tool kit
- IPPC export wooden case
Spray Foam Material Estimator
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Estimated values only. Actual consumption varies with substrate condition, operator technique, overspray and material performance. Assumes ~1:1 A/B and ~8 kg/min output.
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Reference Configuration: This page shows a reference machine configuration for a typical application, based on Pioneer's equipment specifications — not verified performance data from a specific customer project. Figures are design targets or typical values, not measured results. Verified delivery records (real machine + destination country + shipment photos) and documented customer projects are available on request.