Seals
Mining and mineral processing seal map: pit to port
Quick answer
A one-page map of a mining and processing chain, from drilling and haul trucks to mills, flotation and the port, with the main seal duty at each stage.
How to read the map
The boxes follow the ore from the pit through crushing, grinding and flotation to storage and shipping. The numbered dots show the main seal duties at each stage. Mobile equipment sits at the front of the chain, big rotating mills in the middle, and wet, slurry-handling equipment at the end.
Stage by stage: seal duty and what usually goes wrong
| Stage | Main seal duty | What usually goes wrong | What helps |
|---|---|---|---|
| Drilling and loading | Hydraulic cylinders, track pins, swing drives | Rod seals scratched by dirt, pin seals worn by grit | Strong wipers, abrasion-resistant materials, sealed track pins |
| Haul trucks | Wheel hubs, drivelines, suspension cylinders | Slow-speed, full-stroke duty, then short fast strokes when empty, wears rod seals unevenly | Metal face or cassette seals on rotating parts, self-lubricating rod materials on cylinders |
| Primary and secondary crushing | Dust exclusion, oil retention in drives | Shock loads open clearances and let dust in | Multi-lip protection with V-rings, regular grease purge |
| Conveyors and stockpile | Pulley shafts and gearbox outputs under abrasive dust | Lips wear and bearings run contaminated | Wear-resistant polyurethane lips, extra V-rings |
| SAG and ball mills | Large trunnions, gear drives, washdown | Oil leaks and slurry ingress through worn felt or single lips | Double or triple lip split seals with a purge feature |
| Cyclones, pumps, flotation | Slurry and water exclusion on pump and agitator shafts | Abrasive slurry gets under the lip, shafts wear | Shaft sleeves, flush or purge, suitable lip material |
| Thickeners and filters | Slow drives and wet conditions | Corrosion and water ingress | Corrosion-resistant materials, sealed bearings |
| Loadout and port | Conveyors, stackers, ship loaders | Outdoor weather, salt and dust | Sealed units, covers, regular inspection |
What the map tells a planner
- Mobile equipment seals fail most often per year and need the toughest materials
- Mill trunnions and drives are the highest-cost seal jobs, so downtime planning matters most there
- Wet processing turns every lip seal into a slurry exclusion seal
- A single wear sleeve or purge line can add many months of life
Takeaway. Seal trouble moves along the chain: mobile hardware at the front, big shafts in the middle, slurry at the end. Plan the seal choice for each zone.
Put it to work in the tool