OSENC Magnetic Separation
Magnetic Separation for Aggregate and Quarry Plants
In aggregate and quarry lines, magnetic separation is normally used to remove bucket teeth, drill steel, bolts, wire, and other tramp iron before crushers, screens, or conveyors are damaged. Start with a suspended magnet above the feed conveyor; select it from actual burden depth, belt speed, suspension height, iron size, and discharge requirement.
Where to Install Magnetic Protection
| Position | Purpose | Main check |
|---|---|---|
| Before primary/secondary crusher | Remove damaging large iron | Deep burden and largest critical iron |
| Above transfer conveyor | Catch exposed iron after material disturbance | Headroom, speed, discharge clearance |
| At conveyor head | Continuous separation at discharge | Whether a magnetic head pulley fits the conveyor |
Quarry Conditions That Change Selection
- High bulk density increases burden mass and working distance.
- Large lumps can shield smaller iron and strike the magnet or cleaning belt.
- Dust, rain, vibration, and outdoor temperature affect drives, bearings, guards, and electrical components.
- Sharp iron may damage a self-cleaning belt.
- Steel idlers and support structure can distort the active field.
Manual or Self-Cleaning?
Manual cleaning may fit occasional tramp iron and planned shutdowns. Continuous quarry operation or frequent bucket teeth, wire, and bolts normally requires review of a self-cleaning overband. The cleaning belt needs a safe iron discharge route and maintenance access.
What Magnetic Protection Does Not Replace
A magnet does not replace controlled loading, metal detection where required, crusher protection controls, or inspection. It will not reliably remove aluminum, copper, or iron fully locked inside a large rock. Define the smallest critical target and test it under realistic burden conditions.
Commissioning Checks
Measure the final magnet height and peak burden, verify that captured iron clears the conveyor and guards, and confirm cleaning-belt direction and tracking where applicable. Test representative iron at the top and bottom of the normal burden using an approved safe procedure. Record belt speed, depth, iron size, placement, and result.
Required Project Information
Send material, maximum lump size, capacity, bulk density, belt width/speed/trough, normal and surge burden depth, iron photographs, proposed position, available space, environment, operating hours, and cleaning requirement.
Quarry Inputs That Change Separator Size and Position
Use these inputs to decide whether the proposed separator and process position fit the real operating duty.
| Equipment direction | A suspended magnet is normally reviewed for large tramp iron above a belt; a head pulley or drum can be considered for continuous removal of smaller liberated ferrous pieces at a controlled discharge point. |
|---|---|
| Material condition | Record rock type, crushed-size distribution, fines, bulk density, moisture, clay content, abrasion and the maximum burden depth created by feeder or transfer surges. |
| Target iron or magnetic fraction | Describe drill steel, teeth, liner fragments, bolts, mesh and wire by typical and maximum size, burial depth and the downstream equipment they could damage. |
| Throughput and presentation | Provide design and normal t/h, belt width, belt speed, trough angle, loading profile and peak layer depth instead of selecting from belt width alone. |
| Installation and access | Confirm suspension steelwork, magnet-face height, access road or lifting route, discharge-bin clearance, outdoor exposure and safe cleaning or belt-maintenance area. |
| Test or acceptance | Validate the proposed working height with representative targets at center and edges of the burden, including the deepest credible operating layer. |
What We Need to Configure This Project
Input set for Magnetic Separation for Aggregate and Quarry Plants
- How we use your data: We compare your material, contamination risk, production target and line interface before we configure a proposal or rule out an unsuitable option.
- Material: name and composition; dry or wet; powder, granule, lump, fibre or slurry; minimum, maximum and typical particle distribution; moisture, stickiness, tendency to cake or bridge, abrasiveness, corrosiveness, bulk density, normal temperature and maximum temperature.
- Production and target: normal and peak throughput, continuous or batch feed, feed uniformity, contaminant or recovery target, magnetic response if known, typical and maximum target size, initial concentration, acceptable residual and whether product loss is permitted.
- Installation: belt width and speed, normal and maximum burden depth, magnet position and rated working distance, available suspension and maintenance space, support and lifting arrangement; cleaning method, permitted shutdown, contact-material, wear and corrosion requirements; indoor, outdoor, washdown, high-humidity, dusty or hazardous-area conditions.
- Supporting project files: drive voltage, frequency and phase where a self-cleaning unit is considered; control interface and any site air requirement; destination country; current drawings, site photographs, running video and a representative material/contaminant sample when testing is needed.
- What you receive next: We use the confirmed inputs to prepare a project-specific drawing and inspection plan. We do not treat performance as confirmed until the agreed design and any required representative test or site acceptance establish the result.
Project Support
Send your material and process conditions
We can review the process point, material shape, iron source, capacity, available space and cleaning method before recommending a magnetic separator layout.
Frequently Asked Questions
Why is “Manual or Self-Cleaning” important for this decision?
Manual cleaning may fit occasional tramp iron and planned shutdowns. Continuous quarry operation or frequent bucket teeth, wire, and bolts normally requires review of a self-cleaning overband.
What Magnetic Protection Does Not Replace?
A magnet does not replace controlled loading, metal detection where required, crusher protection controls, or inspection.
Why is “Commissioning Checks” important for this decision?
Measure the final magnet height and peak burden, verify that captured iron clears the conveyor and guards, and confirm cleaning-belt direction and tracking where applicable.