Q355B Mining Steel Structure Conveyor Gallery and Transfer Tower with Customized Size and High Load Bearing Capacity

A mining plant is a network of conveyor galleries and transfer towers, with the process buildings hung off it. Every mining steel structure on the site is designed from the process data rather than from a building code. Most of the steel goes into that network, and almost all of the difficulty does too: long spans, high supports, dust, abrasion and a site where the biggest crane may be the one you brought.

Conveyor galleries  •  Transfer towers  •  Screening plants  •  Q355B  •  AS 4100 / SANS / GB

• Conveyor galleries. Elevated, inclined or horizontal, carrying the belt, the walkway, the cables and the maintenance access. Usually the largest single steel item on the project.
• Transfer towers. Where one belt drops onto another, or onto a screen. Tall, heavily loaded, and full of openings for chutes and access.
• Crushing and screening plants. Frames that carry vibrating equipment, which means dynamic loads and a structure that must not resonate.
• Stockpile sheds and reclaim tunnels. Long spans over material, with the machine acting on the pile underneath.
• Headframes and hoisting towers. Concentrated loads, small footprint, high consequence.
• Support buildings. Workshops, warehouses, control rooms and laboratories — the same steel buildings as any industrial site, with a different corrosion category.

Belt tension is a permanent horizontal force at the pulley, not a wind load. Material falling onto a chute is an impact, not a live load. A vibrating screen applies a dynamic force at a frequency, and the structure has to be stiff enough that the frequency does not land on a natural mode.

None of that is in a building code. It comes from the process data: belt tension, chute geometry, equipment mass and operating frequency. A fabricator who has only built warehouses will price the tonnage and miss the loads.

Where ore strikes steel — chute liners, skirt boards, impact beds — the answer is wear plate, not paint. Where the steel simply stands in the atmosphere, the answer is a coating system selected for the corrosivity category: C4 for most inland plants, C5 for coastal or heavily dust-laden sites.

Hot-dip galvanizing plus a topcoat is the usual combination for a plant that has to last twenty years without access for repainting. The coating thickness is specified as a number, not as "heavy duty".

Mining steel structure projects are remote. The erection crane is smaller than the shop crane, the laydown area is limited, and every hour of site welding costs more than an hour in the factory.

So the structure is broken into modules: a gallery into 12 m bolted sections, a tower into panels that fit a container or a flat rack, connections designed as bolted with site welds only where there is no alternative. Every piece is match-marked against the erection drawing, and the packing list follows the erection sequence rather than the fabrication sequence.

Mining steel structure projects usually name a standard rather than accept a local one. AS 4100 and AS/NZS 1554 for Australian-owned projects, SANS 10162 for South African, GB 50017 for Chinese-owned operations, and a client specification on top of any of them.

The documentation is part of the product: mill certificates to EN 10204 3.1, an inspection and test plan agreed before fabrication, NDT to the specified percentage, dimensional records and a packing list that matches the marks. On a remote site, a missing certificate can stop a shipment.

Send these and we return the module breakdown, the weight and a quotation.