Steinert Magnetic Separators: A Field Guide to Choosing the Right System (And Knowing When Not To)

First, a quick note. If you searched for 'steinert' and meant a person—like 'heidi lodish steinert' or 'nicole griggs steinert high school'—or if you're chasing a fantasy football stat like 'how many fumbles does henry have' and the names 'ford' and 'jones jr' are involved, this is the other Steinert. The one that builds magnetic separators, eddy current sorters, and sensor-based sorting equipment. If that's not what you need, no hard feelings.

If it is what you need, this guide will help you choose—because there's no single best Steinert machine. There's only the right machine for your material, your volume, and your deadline.

There is no universal 'best Steinert.' There's the right machine for your material, your volume, and your deadline.

A Quick Word on How I Think About This

I'm an applications engineer at an equipment integration firm, and for the past eight years I've coordinated more than 200 rush orders for magnetic separation and sorting systems. Some were $3,000 parts. Actually, the cheapest was a $600 sensor cable, but the process was the same. Some were quarter-million-dollar lines. In every case, the same three questions drive the decision: How much time do we have? Can anyone actually hit that time? And what happens if it fails?

That's why I don't answer 'which Steinert should I buy?' with a model number. It depends. So let me give you a decision tree instead.

Scenario A: You're Pulling Ferrous Metal Out of a Non-Magnetic Product

This is the classic magnet job. You have crushed concrete, glass, plastic granules, fertilizer, or wood chips, and you need to remove steel contamination before shipment or further processing.

Use a magnetic separator—an overbelt magnet or a magnetic drum. A magnetic drum is often better for finer feed because the material is in contact with the magnetic field longer. Steinert's drum units are common here. Keep the feed layer thin and the belt speed moderate. Don't start with a sensor sorter; it's overkill for ferrous removal.

One counterintuitive thing I've learned: bigger isn't always better. Everything I'd read said oversized magnets give you safety margin. In practice, I saw a plant install a larger magnet, then had to speed the belt up to avoid a bottleneck. The faster belt shortened contact time, and fine iron recovery got worse. A smaller magnet at a slower speed outperformed it. So don't oversize without thinking about belt speed and feed depth.

Scenario B: You're Recovering Non-Ferrous Metal From Shredder Residue or Ash

For aluminum, copper, and other non-ferrous metals in 2–80 mm particles, an eddy current separator is the no-brainer starting point. The Steinert NES series is built for this. The rotating magnetic rotor induces eddy currents in conductive particles and throws them out of the waste stream.

Important: remove ferrous metal first. If you feed steel into an eddy current separator, it can damage the belt and interfere with the field. Also, keep in mind that stainless steel is more conductive than people assume. If your target is aluminum but your feed contains stainless grinding fines, a single eddy current pass won't give you a clean product. That's a red flag—not a reason to abandon the eddy current. You need a sensor sorter downstream.

If you're in a rush, don't rebuild a failed rotor as a money-saving shortcut. I've seen three rebuilt rotors fail within months. The OEM replacement cost more, but it also came with a warranty and a commissioning date. In emergency mode, pay for certainty.

Scenario C: You Need to Sort Complex Materials Beyond Magnetizability

This is where sensor-based sorting comes in. If you're dealing with mixed alloys, insulated wire, contaminated glass, or e-scrap, magnets and eddy currents can't tell the difference between copper and brass, or between aluminum and a plastic that looks identical. Steinert's sensor systems—using color, X-ray transmission, or induction sensing—can.

But I'll be honest about the limitations. Sensor sorters need dry, sized, single-layer feed. If your material is sticky, wet, or loaded with fines, the sensor can't see enough to make good decisions. And below a certain throughput, the operating cost outweighs the recovery gain.

That last point goes against the marketing you'll hear. Conventional wisdom in scrapping is 'automation always beats manual sorting.' In my experience, manual sorting is still the rational choice for very low-volume, high-variability lines. At a certain scale, sensor sorting is fantastic. Below that scale, it's an expensive ornament. There's no shame in doing the math.

Scenario D: It's an Emergency and the Line is Down

From the outside, a rush order looks like a supplier just working faster. The reality is that an emergency usually means changing the machine selection entirely. When a separator fails on a Thursday and a client has a Tuesday deadline, the selection criteria change completely. We're not choosing the perfect machine anymore. We're choosing the machine that can be delivered, installed, and commissioned in the available window.

In those situations, I follow a simple triage ritual:

• Check for a demo or rental unit first. Steinert's Practice Center and regional dealers keep test machines moving. A used or demo unit might be on site in days, not months.
• Stick to standard configurations. Custom voltage or special belt widths add lead time. If a standard unit will work, buy standard and modify the surrounding process instead.
• Pay for dedicated freight. In our December 2024 rush, we paid $3,900 for a 700-mile flatbed run. I want to say that was the exact number, but don't quote me on it—freight rates change. It was definitely less than the $1,800/hour line downtime the client was facing.
• Get a written commissioning date. A quote with an 'estimated' ship date isn't enough. Ask the supplier to commit to start-up, or you'll pay rush fees with no guarantee.

This approach won't give you optimal recovery from day one. Sometimes you accept a lower-than-spec output to get the line running. That's the honest trade-off of emergency procurement.

Where Steinert Isn't the Answer

Steinert builds good equipment. I'm happy to say so. But if I recommend it in the wrong context, we all lose credibility. So here's when to consider something else:

• If your throughput is under 5 t/h and the material isn't high-value, a simple magnet plus manual sorting may be smarter.
• If your feed is wet and sticky, eddy current and sensor sorters will underperform. Drying is a separate cost that often kills the business case.
• If you're selling a mixed product with no purity specification, you may not need separation at all. That sounds like heresy from someone in this industry, but sometimes 'good enough' is good enough.

Understanding these limits is exactly why a Steinert system—when it is the right fit—tends to be worth it. It's not because it's the best. It's because it's the appropriate tool for a defined job.

How to Tell Which Scenario You're In

Still unsure? Use this quick checklist:

1. Write down the feed. Particle size, moisture, shape, and contaminants matter more than brand.
2. Define the output. What product are you trying to sell? What contaminant will cause a penalty?
3. Estimate your tonnage honestly. A 3 t/h line doesn't need the same technology as a 30 t/h line.
4. Test it. If you're in Scenario B or C, run a bulk sample through Steinert's Practice Center before buying. As of January 2025, that's still the most useful hour you can spend. Nothing on a datasheet tells you as much as six tonnes of your actual material.

Bottom Line

So, bottom line: there is no universal 'best Steinert.' There's the right magnet for ferrous removal, the right eddy current for non-ferrous recovery, and the right sensor sorter for complex alloys—and sometimes no Steinert at all. The key is knowing your scenario, testing your material, and being clear about whether you're in a normal purchase or an emergency replacement.

If you're not sure which branch you're on, start with the checklist and a test run. That will tell you more than any forum debate about model numbers.

Search Intent Note

This article is about Steinert separation technology. If you searched for 'heidi lodish steinert,' 'nicole griggs steinert high school,' 'ford,' 'jones jr,' or 'how many fumbles does henry have,' you're looking for a different Steinert. That's a person or a school, not the German engineering company. No hard feelings—this kind of search confusion happens all the time.