Description
Drawing-based liner plates for the stationary chute between a crusher outlet and the receiving conveyor, feeder, screen or bin.
Crusher discharge chute liner plates protect the fixed structure immediately below or beside the crusher outlet. This zone can receive a concentrated stream of newly crushed material, intermittent surges, rebound and sliding abrasion before the material settles onto the next item of equipment. EB China supplies replacement liner panels manufactured to approved drawings, wear maps, material specifications, fixing details and inspection requirements.
This product is for the stationary discharge chute and transition assembly. It does not include internal crusher wear parts such as mantles, concaves, jaw plates, blow bars or rotor components. It is also distinct from the downstream conveyor head-chute liners used where material leaves a belt. Defining that equipment boundary at the RFQ stage prevents drawing revisions and mismatched spare-part lists.
Defined equipment boundary
Outlet liners, impact surfaces, sidewalls and transitions are separated from crusher internals and receiving-equipment liners.
Wear-zone layout
Material, thickness and panel size can be assigned by measured impact, sliding and low-wear zones instead of one blanket specification.
Shutdown-ready supply
Permanent part IDs, inspection records and position-based packing support controlled replacement during a planned shutdown.
Featured-image disclosure: the real quarry transfer-station image is Figure 15 from Doroszuk, Król and Wajs, Energies 14(13), 4008 (2021), used under CC BY 4.0. It provides industrial transfer context and is not an EB China installation. Cropping and presentation layout may differ from the source; no equipment-performance claim is inferred from the image.
Scope and equipment boundary
| Area | Typical scope | Boundary question |
|---|---|---|
| Crusher internals | Mantle, concave, jaw plate, cheek plate, blow bar or internal frame protection. | Is the part inside the crusher manufacturer’s pressure or crushing chamber? If yes, it is normally outside this product scope. |
| Crusher outlet interface | Throat, flange, short adaptor or removable protection immediately after the machine outlet. | Who controls the mating dimensions and allowable clearance: the crusher OEM or the chute designer? |
| Stationary discharge chute | Impact plate, sidewall, rear wall, transition, lip and access-adjacent liner panels. | Which panels belong to the fixed chute BOM and which drawing revision is approved? |
| Receiving equipment | Feeder deck, screen feed box, conveyor loading zone or bin inlet protection. | Where does the chute terminate and the receiving-equipment wear package begin? |
For the upstream side, see Crusher Feed Chute Liners. For a belt head-chute application, see Conveyor Discharge Chute Liner Plates. Keeping separate drawings and part numbers for these functions improves traceability and reduces accidental substitution.
Why the crusher discharge zone needs a dedicated liner plan
The discharge stream can differ from the crusher feed in particle-size distribution, velocity, shape and flow consistency. Newly fractured rock may present angular edges, while surges can move the impact footprint from one panel to another. A short drop may be dominated by sliding abrasion; a long or offset drop may add concentrated impact and rebound. Wet fines can pack behind a lifted edge or accumulate at a joint. These mechanisms do not justify a material choice by themselves, but they explain why a generic “hardest plate available” instruction is not enough.
A useful liner plan begins with the flow path and service evidence. Mark the normal stream, surge envelope, rebound area, build-up locations and measured remaining thickness on a liner map. Record whether wear is uniform, one-sided or concentrated around joints and fixings. Then divide the chute into maintainable panels that preserve opening, access and lifting limits.
Interfaces to show on the drawing
- Crusher outlet flange, throat or OEM-controlled clearance envelope.
- Material-flow direction, expected impact footprint and maximum stream envelope.
- Minimum clear opening after all liner thicknesses and fastener heads are included.
- Receiving conveyor, feeder, screen or bin interface, including required clearances.
- Chute shell datums, structural supports, access doors and removable maintenance panels.
- Dust extraction, water spray, inspection port and sensor locations that must remain unobstructed.
- Fixing access from the shell side and the safe removal direction for each panel.
- Panel numbers, orientation marks, drawing revision and replacement sequence.
Wear zones and liner functions
| Zone | Observed duty | Drawing and RFQ focus |
|---|---|---|
| Outlet throat | Concentrated flow, occasional bridging and close equipment clearances. | OEM boundary, minimum opening, replaceable-part ownership and access. |
| Primary impact surface | First contact, high local energy and rebound toward side or rear walls. | Impact footprint, support span, panel mass, toughness and fixing protection. |
| Sliding path | Continuous abrasion after the stream has been redirected. | Flow-facing joints, smooth transitions, wear allowance and replacement limit. |
| Sidewall/rebound zone | Intermittent contact that may become severe during surges or off-center flow. | Left/right identity, upper wear margin, joint alignment and inspection access. |
| Lower transition and lip | Stream convergence, possible build-up and transfer into receiving equipment. | Taper, radius, final opening, protrusions and downstream clearance. |
| Low-wear/access zone | Limited direct contact but important for safe removal and shell protection. | Avoid unnecessary panel mass while preserving complete coverage and access. |
Material options for approved service conditions
Available material families can include rolled wear plate, high-chrome cast iron, Ni-Hard or a buyer-specified alloy. Selection must consider the real combination of impact, sliding abrasion, support, temperature, corrosion, fabrication, attachment and removal. Nominal hardness alone does not predict service life in an unsupported or misaligned panel.
| Material family | Potential application | Checks before approval |
|---|---|---|
| NM400 / NM450 wear plate | Fabricated panels requiring a practical balance of abrasion resistance, forming and impact tolerance. | Thickness, rolling direction, bend radius, hole process, heat input, backing and fastener design. |
| NM500 wear plate | Severe sliding zones where shock loading, forming and attachment conditions are compatible. | Impact severity, unsupported span, bending requirement, panel size and safe replacement method. |
| High-chrome cast iron | High-abrasion zones that suit a cast section and controlled impact condition. | Section transitions, attachment, backing support, casting tolerance, edge loading and handling. |
| Ni-Hard or specified casting alloy | Drawing-defined cast liner applications with an established site specification. | Grade designation, chemistry/hardness criteria, impact condition, inspection and traceability. |
| Zone-specific mixed layout | Different grades or thicknesses assigned to impact, sliding and lower-wear zones. | Interface steps, substitution control, BOM clarity, spares policy and consistent part marking. |
Use the Chute Liner Material Grades Selection Guide as a comparison framework. The final grade and thickness require approval against site operating data and service history.
Panel geometry and maintainability
Panels may be flat, bent, tapered, curved, segmented or cast to an approved section. Geometry should be controlled from stable shell datums or a verified scan, not only from the thinnest edge of a worn sample. A heavily worn sample can hide original overlap, clearance and hole-center relationships.
Panelization is a maintenance decision as well as a manufacturing decision. One large panel reduces joints but may exceed the lifting limit or require removal of adjacent equipment. Smaller panels improve selective replacement but add joints and fixings. The drawing should state the maximum individual mass, permitted lifting points, access envelope and replacement order. Mirrored parts need unique left/right markings even when their outlines appear similar.
Fixing options and backing condition
| Fixing method | Potential benefit | Essential checks |
|---|---|---|
| Standard bolt-on | Direct inspection and replacement where rear access is available. | Head exposure, hole clearance, shell condition, washer/nut access and installation procedure. |
| Countersunk bolt | Reduced projection on the wear face and smoother material passage. | Countersink geometry, remaining section, bolt seating, recess wear and removal access. |
| Stud-backed panel | Clean wear face with attachment from the shell side. | Stud position, attachment quality, shell holes, alignment, access and welding qualification where applicable. |
| Keyhole or retained slot | Potentially faster removal in a drawing-controlled system. | Installation direction, retention under vibration, slot wear, backing clearance and secondary restraint. |
| Plug-weld detail | Attachment where the approved maintenance method allows welding. | Weld procedure, heat input, access, shell protection, removal plan and inspection. |
Related configurations include Bolt-On Chute Liner Plates, Countersunk Bolt Wear Plates and Stud-Backed Chute Liner Plates. Loose fasteners, elongated holes or fretting marks are evidence to investigate the support and installation system, not merely reasons to supply a thicker replacement.
Panel joints and flow direction
Every liner map should carry a flow arrow. A raised upstream edge can receive direct impact, trap fines and start progressive lifting. Overlaps, gaps and butt joints must be drawn in relation to the material path, thermal condition and installation tolerance. Adjacent plates should not create an unplanned ledge that narrows the opening or redirects the stream into the shell.
When the old liner has moved, measure the shell datums and neighbouring panels before copying the joint. Record any packed material behind the liner because it can indicate a gap, loose fixing or distorted backing. See the Panel Joints, Gap, Overlap and Flow Direction Guide for drawing notes and inspection points.
Impact plate, rock box or lined transition
The discharge chute may redirect material with a replaceable impact plate, a material-on-material rock box or a continuously lined transition. These are flow-system choices, not interchangeable catalogue parts. An impact plate provides a defined sacrificial surface but concentrates load on its support. A rock box can retain a protective bed of material, but its capacity and cleanout behaviour must suit moisture and operating variability. A lined transition can provide a smooth route where impact is moderate and opening must be preserved.
If these components are already part of the approved design, quote them using their own drawings and location IDs. See Impact Plate Chute Liner Plates and Rock Box Chute Liner Plates. EB China does not infer or redesign a flow-control arrangement solely from a worn sample.
Dust, spillage and blockage interfaces
A liner replacement can affect the effective opening, surface steps and local flow path. Dust leakage or spillage may also originate from enclosure gaps, pressure conditions, loading instability or receiving-equipment interfaces. Therefore, a worn liner and a dust symptom should be documented together without assuming that liner hardness alone will solve the problem.
Show extraction take-offs, sprays, skirts, curtains, inspection ports and sensors on the arrangement drawing. The replacement panel must not obstruct these devices or reduce a designed ventilation passage. Where build-up occurs, provide photographs taken before cleaning, the material moisture range and the location of manual cleanout. Final dust-control and ventilation decisions remain the responsibility of qualified site engineers.
Thickness measurement and replacement limits
Record original thickness, measured remaining thickness, operating hours or tonnage and the measurement location. A single minimum value is less useful than a repeatable grid referenced to panel datums. The grid shows whether the stream is stable, shifting or attacking a joint. It also helps distinguish a genuinely under-specified wear zone from an abnormal loading condition.
Replacement limits should account for structural support, fastener security, hole or recess condition, shell protection and the ability to remove the panel safely. Do not wait for perforation if the remaining section can no longer retain the fixing or bridge the support span. Conversely, replacing every panel at the first local low reading may waste usable life if selective replacement is approved and the adjacent interfaces remain sound.
Inspection and quality documentation
| Inspection item | Typical evidence | Acceptance basis |
|---|---|---|
| Material identity | Grade/specification, thickness, heat or batch reference and certificates where ordered. | Purchase specification and approved drawing/BOM. |
| Profile and forming | Outline, datums, bends, taper, radius and critical fit dimensions. | Drawing tolerances and agreed measurement method. |
| Fixing details | Hole/slot centers, countersinks, studs, recesses and attachment inspection. | Approved fixing drawing and installation interface. |
| Surface and hardness | Visual condition and hardness results when specified and technically applicable. | Material standard and agreed inspection plan. |
| Traceability | Equipment tag, part number, position, drawing revision and permanent orientation mark. | Approved liner map and packing list. |
| Shipment release | BOM reconciliation, inspection report, marking and location-based packing photographs. | Purchase order and document schedule. |
The Pre-Shipment Chute Liner Inspection Checklist can be adapted to the project. Critical dimensions should focus on fit, opening, joint alignment and fixing access rather than creating a long list of non-functional checks.
Part marking, spares and shutdown staging
Each plate should carry a durable part ID that matches the liner map and packing list. Include equipment tag, position, left/right orientation and drawing revision where space permits. Replacement kits can be packed by chute level, wall or shutdown sequence. Fasteners and small components should be identified separately so crews do not have to open every crate to locate one position.
Spare quantities can be based on wear-zone history rather than treating every panel equally. High-wear impact and sliding panels may justify more spares, while low-contact access panels may need only contingency coverage. The operating site remains responsible for its inventory policy and shutdown risk assessment.
RFQ information checklist
| Input | Provide if available | Purpose |
|---|---|---|
| Drawings | General arrangement, liner map, individual panels, revisions and mating interfaces. | Defines product boundary, geometry and part identity. |
| Crusher and receiving equipment | Make/model, outlet envelope, downstream machine, clearances and operating direction. | Prevents interference and scope ambiguity. |
| Material handled | Ore/mineral, maximum lump, grading, moisture, fines, temperature and contaminants. | Describes impact, abrasion, build-up and compatibility context. |
| Operating data | Normal/peak throughput, hours, start-stop pattern and known surge events. | Places observed wear in a service-life context. |
| Wear evidence | Clean and dirty photographs, measurement grid, tonnage/hours and failure notes. | Supports zone-specific review and avoids copying an abnormal condition. |
| Fixing and support | Fastener specification, rear access, shell/backing condition and installation method. | Controls hole details, attachment and fit. |
| Maintenance limits | Access opening, lifting limit, shutdown duration and preferred replacement sequence. | Controls panelization, marking and packing. |
| Quality documents | Certificates, inspection plan, reports, witness points and packing requirements. | Defines deliverables before production. |
If no reliable drawing is available
Send a numbered photo set, a liner location sketch, stable shell datums and measurements from more than one reference. Include the worn sample only as supporting evidence. Mark uncertain dimensions rather than presenting estimates as verified values. EB China can organize manufacturing information from supplied data, but the customer or its qualified engineer must approve the final geometry, material, clear opening, structural interface and installation method before production.
Related upstream and downstream wear parts
A crusher discharge liner should fit into a controlled wear-part chain. The upstream feed chute may require different impact and flow considerations, while the downstream receiving conveyor has its own loading-zone and containment interfaces. Relevant pages include Crusher Feed Chute Liners, Conveyor Transfer Point Wear Liners, Conveyor Discharge Chute Liner Plates and Custom Chute Liners.
Safety and engineering boundary: inspection, cleaning and liner replacement must follow the site’s guarding, isolation/lockout, stored-energy, lifting, working-at-height and confined-space procedures. Final crusher clearances, chute geometry, structural support, ventilation, dust control and installation approval remain the responsibility of qualified site personnel and the relevant equipment owner.
Request a crusher discharge chute liner quotation
Send the arrangement drawing, liner map, panel drawings, crusher and receiving-equipment interfaces, operating data, wear measurements, photographs, fixing details and document requirements. We will review the drawing-based manufacturing scope and identify missing information before quotation.
Technical and image references
- Metso: Chutes — equipment context distinguishing crusher feed and discharge chute applications.
- CDC/NIOSH: Dust Control at Conveyor Transfer Points — transfer enclosure and dust-control context.
- Doroszuk, Król and Wajs (2021), Energies 14(13), 4008 — source of the real quarry transfer-station featured image, Figure 15, CC BY 4.0.
Image-use note: external installation photographs are clearly identified and do not depict EB China projects. The EB China workshop composite is based on real manufacturing photographs with layout and tonal adjustments only. No external image implies endorsement, site ownership or guaranteed performance.
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