Conveyor Sidewalls and Transfer Chutes for Mining and Bulk Handling
Sidewalls and chutes are the material containment and transfer structures that keep bulk material on the conveyor, direct material flow between conveyor stages, and absorb the impact of material loading at transfer points. In heavy mining and bulk handling environments, they are subject to continuous abrasive wear from the transported material and impact loading at loading zones—making material selection, liner geometry, and construction quality the primary determinants of service life and maintenance cost.
Mine Components manufactures conveyor sidewalls and transfer chutes in wear-resistant steel for scraper conveyors, belt conveyors, and gravity transfer applications in underground mining, surface mining, coal handling, and aggregate processing.
Applications
Scraper conveyor sidewalls — the lateral containment panels above the pan side that prevent material overflow from the chain conveyor. In underground coal applications, sidewalls are subject to convergence loading from the roof and rib as well as abrasion from the coal being transported. They must maintain dimensional integrity to preserve clearance for the scraper chain and flights.
Belt conveyor loading zone sidewalls (skirting) — at transfer points where material drops onto a belt conveyor, sidewalls (skirt boards or skirting) contain the material during the settling zone and prevent spillage onto the conveyor structure. These components experience continuous abrasion from the underside of the material stream and impact from lump material striking the inner face.
Transfer chutes — the structural channels that direct material flow from one conveyor to another, from a crusher discharge to a conveyor, or from a screen to a stockpile. Chute geometry determines the material trajectory and velocity; liner material and thickness determine the time between liner replacement campaigns. Chute wear is concentrated at impact zones (where the material stream first contacts the chute surface) and at slide zones (where material travels at high velocity along the surface).
Rock boxes and dead boxes — static material accumulation zones installed at high-energy impact points in transfer chutes to allow material to build up and protect the structural chute behind it. Rock box geometry is engineered to trap a stable layer of process material that then absorbs the impact from incoming material rather than the structural steel of the chute.
Material Selection for Wear Resistance
The optimal material for a sidewall or chute liner depends on the nature of the wear mechanism—whether the primary wear mode is abrasion (sliding contact with the material), impact (high-velocity particle impact), or a combination of both.
Wear-resistant steel plate (350–400 HB) — the standard choice for most conveyor sidewall and chute applications. Provides a good combination of abrasion resistance and toughness to resist impact loading. Suitable for coal, aggregate, and general mining applications where lump size is moderate and impact energy is manageable.
High-hardness wear plate (450–500 HB) — for applications with highly abrasive material (iron ore, copper ore, hard limestone, quartzite) or high sliding velocity. Provides significantly longer liner life in abrasion-dominated applications but is more susceptible to cracking under severe impact or from thermal cycling in exposed outdoor installations.
Chromium carbide overlay (CCO) plate — for extreme abrasion applications where standard wear plate service life is unacceptably short. CCO plate consists of a mild steel or low-alloy base plate with a chromium carbide hard-facing layer deposited by automatic welding. The hard-facing layer (typically 55–65 HRC) provides outstanding resistance to fine particle abrasion. CCO plate is less suited to high-energy impact applications due to the brittle nature of the hard-facing layer.
Cast basalt and ceramic liners — for fine particle, high-velocity abrasion applications in coal handling, cement, and chemical processing where both CCO plate and standard wear steel have proven insufficient. These materials offer the highest abrasion resistance of any available liner but are brittle under impact and must be installed in applications where lump material contact is excluded by upstream screening.
We advise on liner material selection based on the material type, lump size distribution, conveyor speed, transfer height (drop energy), and current liner service life. In most cases, a trial installation of two or three candidate materials in adjacent liner positions provides the most reliable basis for a material selection decision.
Chute Design Principles
Beyond liner material selection, chute geometry has a significant influence on wear rate and material flow behavior. A chute designed with an overly steep impact angle causes material to strike the liner at high velocity, concentrating wear at the impact zone. A chute with insufficient flow gradient causes material to stall, increasing compressive abrasion and creating blockage risk for sticky materials.
We produce chutes to client-supplied designs as well as advising on geometry modifications to address recurring wear problems. Common modifications that extend chute liner life include: reducing the material impact angle through curved or angled deflector sections, installing rock boxes or dead-bed zones at primary impact points, providing liner attachment designs that allow liner replacement from outside the chute body (reducing maintenance access requirements), and segmenting liners to allow replacement of the highest-wear zones independently of sections that are not yet worn.
Construction and Liner Attachment
Sidewalls and chute structures are fabricated from structural steel (S355 or equivalent) with wear liner attached by counter-sunk bolts, welded studs, or plug welding depending on liner material and maintenance access requirements. Bolt-on liners are preferred where liner replacement frequency is high, as they can be replaced without cutting or grinding. Welded or plug-welded liners provide a smoother material contact surface but require cutting for replacement.
For chutes subject to very high impact loading, we design and fabricate structural reinforcement into the chute body to prevent deformation of the structural shell independent of the liner wear life. Shell deformation that follows liner wear-through can require structural repair rather than simple liner replacement, significantly increasing maintenance cost and downtime.
Customization
All sidewall and chute components are produced to client drawings or to dimensions agreed following a site survey or review of existing component drawings. We support the full range of customization: modified liner thickness, alternative liner materials in the same structural form, reinforced attachment systems for high-vibration environments, access doors and inspection hatches integrated into the chute structure, and modified flange geometry for retrofitting to existing conveyor structures.
Quality Assurance
Deliveries include material certification for structural steel and liner plate, dimensional inspection records, weld inspection records, and where specified, hardness verification of liner surfaces. Documentation is provided per batch with full traceability.
Ordering and Lead Times
Standard-geometry sidewall panels and simple chute sections: 3–5 weeks. Complex fabricated chute assemblies with multiple liner zones and integrated access provisions: 6–10 weeks depending on size and complexity. Liner plate supply in standard sizes can often be expedited where the structural fabrication is being handled locally.
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Related Components
Sidewalls and chutes are commonly supplied alongside Scraper Pan Sides, Connecting Housings, and for belt conveyor applications, Frames and Structural Supports. See the Material Transfer and Chute Systems application page for a system-level overview of transfer chute design considerations.