Apron Feeder Discharge Chute Liner Plates

Apron feeder discharge chute liner plates protect the transition where heavy, often coarse material leaves the feeder pans and enters a crusher, conveyor chute or downstream process. EB China manufactures replacement liner panels to approved drawings, wear maps and inspection requirements for mining, quarrying, cement and bulk-material plants.

What this product covers

This product covers replaceable wear panels installed in the discharge transition associated with an apron feeder. Depending on the equipment arrangement, the liner set may include discharge-end sidewall plates, transition chute panels, impact-zone plates, lower side liners, curved or bent corner pieces, closure plates and interface panels around structural members.

The liner is distinct from the apron feeder pan itself, chain, roller, sprocket and drive components. It is also distinct from the receiving crusher wear parts. Defining these boundaries on the general arrangement prevents ambiguous quotations and helps the maintenance team assign each part number to the correct assembly.

Why the discharge transition requires its own liner plan

An apron feeder meters material, but the discharge chute still experiences changing loading conditions. Large lumps can strike a local zone, smaller particles can slide along the lower wall, and off-centre loading can produce concentrated wear on one side. The most economical liner set is therefore not automatically one grade or one thickness everywhere. It is a drawing-controlled arrangement in which panel size, material, thickness, fixing and joint direction follow the actual wear map and maintenance access.

Typical interfaces to identify on the drawing

Wear zones and practical design responses

Before changing thickness or alloy, compare the physical wear map with the flow direction and liner drawing. Our guide to chute liner wear mapping and replacement planning provides a practical way to record remaining thickness by panel ID.

Material routes

Material selection should be tied to impact severity, abrasion mechanism, required toughness, usable thickness, fixing method and the owner’s approved specification. Common drawing-based routes include abrasion-resistant steel plate such as NM grades and cast high-chromium iron components for selected severe-abrasion zones. These are not interchangeable by name alone.

For a comparison of the two main routes, see high chrome cast iron vs NM wear plate. Material choice should be approved for the specific service rather than inferred from a photograph.

Panel geometry available to drawing

• Flat rectangular, trapezoidal and irregular-profile liner plates
• Bent liner plates for transition corners and discharge-end profiles
• Curved panels where the chute shell or material path requires a radius
• Handed left/right side liners with permanent part identification
• Panels with reliefs for ribs, welds, access openings or structural attachments
• Multi-piece liner sets organized by equipment tag and drawing position

Critical geometry should be dimensioned from stable datums. Avoid relying only on a worn removed liner: edge loss, deformation and enlarged holes can reproduce the failure in the new part.

Fixing options

Fixing selection depends on access, chute structure, liner thickness and the site replacement method. EB China can process round holes, slotted holes, countersunk holes, plug-weld openings or stud-backed arrangements when defined on approved drawings.

Where external maintenance access is available, review our bolt-on chute liner plates. The article on stud-backed versus bolt-on fixing also helps buyers document the decision.

Joint layout and flow direction

Panel joints are part of the wear system. Show the normal material-flow arrow, upstream/downstream panel sequence, permitted gap, overlap or step, and any edge-bevel requirement. Unsupported edges and poorly oriented overlaps can create local attack or material packing. Use a numbered liner map so the installation crew can confirm orientation before tightening or welding.

For a drawing review sequence, use the panel joint, gap, overlap and flow-direction checklist.

Thickness planning

Thickness should be selected from service evidence rather than a universal table. Record new thickness, measured remaining thickness, operating hours or tonnes, local wear mechanism and planned shutdown interval. Also confirm that a thicker panel will not reduce required clearance, obstruct access, increase unsupported mass or interfere with adjacent moving equipment.

Our liner thickness selection guide explains the input data buyers should collect before revising the drawing.

Dimensional and quality inspection

An inspection plan should identify characteristics that affect fit, assembly and traceability. Depending on the order, the agreed scope may include:

• Overall length, width, thickness and profile against the approved drawing
• Hole size, location, slot orientation and countersink geometry
• Bend angle, inside radius and handed orientation
• Material certificate or chemistry report when required by the purchase specification
• Hardness testing at agreed locations and frequency
• Visual and dimensional inspection of cast surfaces or fabricated edges
• Part marking, drawing revision, heat/batch traceability and quantity check
• Photographic inspection record, packing list and other agreed documents

Required documents must be stated in the RFQ and purchase order. They are not assumed to be identical for every liner package. See our guide to quality documents for custom chute liners.

Part marking and shutdown staging

Apron feeder discharge liners are often replaced during a short shutdown. Each package can be organized around the buyer’s equipment tag, chute position, drawing number, revision and panel ID. A packing list that follows the installation sequence reduces sorting time and helps prevent a left/right panel from being installed in the wrong position.

For planning details, review the part marking and shutdown staging guide.

Information required for quotation

When no reliable liner drawing exists

Provide the general arrangement, clear photographs with scale, a numbered wear map and dimensions from stable chute datums. If removed liners are measured, identify worn or missing edges rather than treating them as the original profile. EB China can review the manufacturing information and highlight missing dimensions, but the final replacement drawing must be approved by the responsible buyer or engineer before production.

Related products

• Crusher feed chute liners for the upstream or crusher-feed transition
• Hopper liners for storage and reclaim structures
• Conveyor transfer-point wear liners for downstream conveying interfaces
• Custom chute liners for drawing-based assemblies outside a standard equipment label

Real-photo context and image licensing

The featured photograph shows a historical belt-conveyor transfer point from the U.S. National Archives / Bureau of Reclamation and is a U.S. federal government public-domain work. Source: Wikimedia Commons file page. It was resized and JPEG-optimized. The inline underground transfer-point photograph is credited in its caption under CC BY 4.0. Both images illustrate real bulk-material transfer environments; neither depicts an EB China installation, an EB China product, or a customer project.

Technical reference

For general apron-feeder component and maintenance context, see the Metso Apron Feeder Handbook. Supplier literature is used only as general equipment context; the buyer’s approved equipment drawings and specifications govern the manufactured liner package.

Operating data that changes the liner requirement

Two discharge chutes with similar dimensions can have very different wear behaviour. Include the normal and maximum throughput, bulk density, representative lump-size range, moisture or clay content, feed interruptions, known tramp-metal events and the downstream equipment condition. If the feeder speed changes by operating mode, identify the modes used when the abnormal wear occurs.

Photographs are most useful when they show the complete material path and include the panel ID or a marked-up drawing. Close-up images alone can hide whether the damage is caused by first impact, redirected flow, joint wash-through or an alignment problem. Where possible, provide thickness readings from more than one shutdown so the wear rate can be compared rather than guessed from a single inspection.

Maintainability and replacement sequence

Panel design should reflect how the liner can actually be removed. Confirm the access door size, lifting points, available handling equipment, back-side fastener access and whether adjacent panels must be removed first. A smaller modular panel may be easier to handle, while too many joints can increase installation time and create additional edge locations. The preferred balance depends on the shutdown method and the wear map.

Site work must follow the owner’s isolation, lockout, stored-energy, confined-space, lifting and hot-work procedures. A replacement liner drawing does not replace a site-specific risk assessment or an approved installation procedure.

Manufacturing handoff and revision control

After technical clarification, the approved manufacturing package should contain the final drawing revision, part schedule, material requirement, critical tolerances, inspection plan and marking convention. Any deviation or proposed manufacturability change should be recorded before production. For repeat orders, quote the previous EB China order reference together with the current equipment drawing revision so that superseded geometry is not reproduced unintentionally.

Where several grades are used in one chute, the BOM and liner map should identify the material of every panel. Permanent or durable temporary marks must remain readable through inspection, packing and site staging.

Frequently asked procurement questions

Can EB China quote from a worn sample?

A worn sample can support material and profile review, but it should be combined with stable datum measurements, the equipment arrangement and buyer-approved replacement geometry. Severe wear can remove the original edges and distort hole positions.

Can one thickness be used for the entire discharge chute?

It can be specified, but it may not be the most economical or maintainable choice when impact and sliding zones differ. A wear map helps determine whether zoning is justified.

Are apron feeder pans included?

No. This page concerns the discharge chute liner plates around the feeder interface. Feeder pans, chains, rollers, sprockets, drives and crusher internals should be identified as separate equipment components.

What files are preferred?

A controlled PDF is useful for approval, while DWG, DXF or STEP data can reduce transcription work for complex profiles. The PDF drawing and its revision remain the reference unless the purchase specification states otherwise.

Request a drawing review and quotation