Can a SAG mill feed throat liner be manufactured from photographs alone?

Photographs help identify the part type. Manufacturing also requires the full model, drawing reference or drawing, internal and external profiles, axial length, flange hole pattern, orientation, material and adjoining interfaces.

Should throat liner material prioritize hardness or toughness?

Large ore impacts are common at the SAG feed end, so fracture resistance and structural support come first. Assess abrasion, slurry conditions, current service life and failure locations when selecting wear-resistant alloy steel, composite construction or other material candidates.

SAG MILL THROAT LINER

Feed Throat Liner

Replaceable feed-end wear part · Supplied to drawing references, interfaces and operating requirements

Installed in the SAG mill feed throat to protect the underlying structure from ore and guide material into the mill. ANRANST provides mill identification, material assessment, drawing review, quality control and finished-part delivery.

Equipment SAG / AG mills

Installation Position Feed-end throat and inlet passage

Main Loads Large-particle impact, abrasion and slurry erosion

Identification requirements Model, drawing reference, profiles, hole pattern and adjoining interfaces

Throat liner identification diagram. Manufacture is governed by the approved installation drawings, dimensions and material requirements.

Part Function

Protect the feed end and maintain a continuous inlet passage

The throat liner sits between the feeder, trunnion or inner feed-end liners. Its internal and external profiles, axial length, flange and hole positions determine correct seating, fastening and a continuous passage to adjoining liners.

Parts with the same name are not necessarily interchangeable. Even mills of the same diameter may use different drawing references because of differences in OEM, shell length, feed-end version, rotation direction or modifications.

Internal and external profiles Passage cross-section, tapered surfaces, curvature and minimum clearance

Mounting Interfaces Flange, hole positions, counterbores, fasteners and adjoining liners

Orientation markings Feed direction, rotation direction, top/bottom orientation and assembly datums

Delivery scope Individual parts, matching fasteners, identification and inspection documents

Position and Performance

Address impact fracture at the feed end before optimizing wear life

Assess component design, rear support, fastening and material as a single system.

Feed impact zone

Check large ore impacts, locally thin sections, casting radii and cracks around holes. Adequate core toughness and continuous support are essential.

Passage wear zone

Check sliding abrasion, slurry erosion, uneven flow and profile changes. An effective passage and safe remaining thickness must be maintained as wear progresses.

Attachment and sealing zone

Check contact surfaces, bolt preload, slurry leakage around holes, steps between adjoining parts and looseness. Inspect the fastening system when replacing the working surface.

Materials and Manufacturing Processes

Screen material candidates for impact, abrasion and support conditions

Specify the final grade, chemical composition, hardness and heat treatment in the approved drawing and technical agreement.

Tough, Wear-Resistant Alloy Steel For throat liners exposed to substantial impact that require structural load capacity and fracture resistance. Select the steel grade and heat treatment according to section thickness, impact energy and wear requirements.

Rubber-Metal Composite Construction Combines elastomer cushioning with a metal working surface in an engineering-approved design. Check reinforcement, encapsulation, bonding and fastening interfaces.

Wear-Resistant Rubber Consider only for suitable feed sizes, temperatures, slurry conditions and structural arrangements. Assess tearing, cutting, reinforcement and fastening.

High-Hardness White Iron Wear Surfaces Consider only in local or composite arrangements with controlled impact and reliable support. High hardness alone does not make a material suitable for every SAG throat liner.

Metso mill lining literature treats the feed end, shell, discharge and trunnion as distinct functional areas, with metal, rubber and composite lining systems. Confirm each replacement against the installed drawings and site conditions. Metso Mill Liners

Failure Diagnosis

Use cracks, uneven wear and looseness to assess materials and interfaces

Photographs of used parts and wear measurements provide more useful information than a material name alone.

Observed condition	Priority checks	Improvement Options
Cracking around holes, at rib roots or in thin sections	Large-particle impact, radii, abrupt section changes, hardness, casting defects, rear contact and preload	Improve fracture resistance, transitions, support, heat treatment and nondestructive inspection
Localized uneven wear on the feed side	Uneven feed flow, impact point, rotation direction, passage profile, steps between adjoining parts and worn clearances	Adapt profiles and materials to the impact and flow conditions in each zone, and restore a continuous passage
Loose bolts or slurry leakage	Grip length, seating surfaces, washers, seals, lubrication, preloading method and contact	Restore the complete fastening and sealing system, and record installation torque or bolt elongation
Rapid working-surface wear without fracture	Ore abrasiveness, flow velocity, liner thickness, current material, hardness gradient and target service life	Improve profile retention and wear resistance while maintaining the required toughness

Drawing References and Inquiry Details

Identify the installed mill before specifying the individual part

Match confirmed OEM drawing references, third-party drawing references and spare part numbers to the installed model and drawing revision.

Equipment identification

OEM, series, full model, serial number, year of manufacture, feed-end version and modification history.

Part references and drawings

OEM drawing references, third-party drawing references, spare part numbers, drawing revisions, assembly drawings and adjoining part references.

Key dimensions

Internal and external profiles, axial length, flange, hole positions and diameters, liner thickness, interfaces, weight and orientation.

Material information

Current material, chemical composition, hardness, heat treatment, composite construction, inspection results and samples from used parts.

Operating conditions and service life

Ore, feed size, abrasiveness, slurry, steel balls, throughput, installation date and actual service life.

Failure records

Overall and close-up photographs, crack locations, wear measurements, looseness, slurry leakage and the reason for replacement.

Related Equipment and Parts

Connect equipment, OEM configuration, lining system and material selection

Use this page to bring together part identification, material requirements and RFQ details from any of these routes.

SAG Mill Lining Systems Return to the complete feed-end, shell, discharge and drive system. General SAG Mills Information Explore the equipment structure, operating principles and component locations. Metso SAG Mill Equipment Identify the installed equipment by brand, series, model and drawing reference. Wear-Resistant Alloy Steel Review impact, abrasion, heat treatment and quality control requirements.

Request a SAG Mill Feed Throat Liner Proposal and Quotation

Provide the full model, drawing reference, drawings, photographs of used parts, key dimensions, material, operating conditions and service-life records.

Send Details for a Quote

Manufacturing Services in China

From Technical Assessment to Finished-Part Delivery

Technical advice, supplier introductions, quality control and finished-part delivery.

Technical Advice

Review the installed equipment, part interfaces, materials, operating conditions and failures.

Supplier Introductions

Coordinate manufacturing of wear-resistant castings, composite liners, machined parts and fasteners.

Quality Control

Track materials, heat treatment, dimensions, nondestructive inspection, weight and trial assembly with matching parts.

Finished-Part Delivery

Deliver the complete package of parts, fasteners, identification, inspection records and installation documents.