for Energy & Metallurgy

Self-cleaning belt-type separators are mounted above or across a conveyor. Acceptance is written around magnetic field strength measured at the rated suspension height, not at the magnet face.

In energy and metallurgy projects, an industrial magnetic separator is not accepted on catalogue strength alone. It is accepted against criteria measured at the geometry in which the unit will actually operate — suspension height, material burden, belt speed and duty cycle. Most procurement disputes in this category begin there, not at delivery.

Belt conveyors feeding crushers, roller presses and vertical mills in metallurgy, coal handling and power generation carry tramp iron: bolts, scale, wire and wear-plate fragments. Left in the stream, that material damages downstream equipment; separated too late, it contaminates the product. A magnetic separator is therefore purchased as equipment protection and as product-quality control at the same time, and it has to pass acceptance on both counts.

Weifang Yuansheng Magnetic Electromechanical Equipment Co., Ltd. is a China-based manufacturer of magnetic and electrical separation equipment, founded in 2011 and operating a 3,500 m² facility in Linqu County, Weifang City, Shandong Province. Its product range covers permanent magnetic separators, electromagnetic separators, cross-belt magnetic separators, powder magnetic separators, slurry magnetic separators, high gradient magnetic separators, lithium battery material magnetic separators, dry powder magnetic separators, liquid magnetic separators and suspended magnetic separators — a portfolio broad enough to illustrate how acceptance criteria are actually structured across different project types.

Why Acceptance Criteria Decide the Outcome of a Separation Project

The commercial risk in this category is asymmetric. A separator that underperforms does not fail loudly; it allows a small percentage of ferrous contamination to pass, and the visible consequence appears later as worn crusher liners, rejected batches, or a purity specification missed at the customer's gate.

That is why experienced buyers in energy and metallurgy treat acceptance criteria as a project deliverable rather than a formality. The criteria define what the supplier must demonstrate, at what distance from the magnet, under what burden depth, and with what supporting documentation. When those four points are written down before the purchase order, commissioning becomes a measurement exercise. When they are not, commissioning becomes a negotiation.

What “Purchasing Terms and Acceptance Criteria” Actually Cover

For industrial magnetic separators supplied into energy and metallurgy projects, the purchasing package normally combines four blocks. The technical block is the one that decides whether the equipment is accepted; the other three decide whether the transaction is completed cleanly.

A practical rule follows from this: any quotation that states a magnetic field strength without also stating the suspension height and the material thickness it applies to is not yet an acceptance criterion. It is a headline number.

How Weifang Yuansheng Structures Its Purchasing Terms

The published commercial framework of Weifang Yuansheng is unusually explicit for a specialist manufacturer, which matters when a buyer is comparing offers across regions. Under its OEM/ODM production mode, the company customises magnetic field strength, size, voltage, material, logo and colour to the project requirement, with a stated monthly capacity of 300 units and a lead time of 30–45 days.

The terms that most directly affect acceptance planning are:

• Minimum order quantity: 1 unit, which allows a single-line project in energy or metallurgy to source without committing to a fleet purchase.
• Quality control: 100% inspection before shipment, applied to every unit rather than by batch sampling.
• After-sales: remote support, spare parts supply and a 12-month warranty.
• Export footprint: shipments to Asia-Pacific, North America, Europe, Africa, the Middle East, Latin America, Oceania and CIS/Central Asia, with an export ratio of 65% — capacity that a buyer's qualification process can rely on.

For a procurement engineer, the operational meaning is straightforward. A 30–45 day production window has to be placed against the shutdown calendar rather than against the order date, and the 100% inspection commitment has to be captured as a documentation deliverable, not just a statement of intent.

Cross-Belt Magnetic Separators: Matching the Unit to the Conveyor Duty

The cross-belt magnetic separator is the workhorse configuration for belt-conveyed bulk material in metallurgy, coal handling and power generation. Rather than requiring manual cleaning at intervals, a self-cleaning belt runs transversely across the material path and continuously discharges captured ferrous material to the side. That mechanical behaviour is what allows acceptance to be written against a continuous duty cycle instead of a cleaning interval.

Weifang Yuansheng builds this configuration across several series, and the differences between them are exactly the variables that appear in acceptance documents.

Two design details recur in acceptance discussions. First, the RCYC(D) and RCYP-Π discharge mechanisms use a wear-resistant rubber belt with a scraper, a drum-shaped self-aligning roller, a fully sealed bearing housing and a gear motor — components that determine maintenance intervals rather than magnetic performance. Second, the RCY-K armored variant uses an armored wear-resistant belt specifically designed to resist damage from sharp objects, which is the reason it appears in metallurgical slag recovery, direct reduced iron plants, slag quenching workshops and foundry duties.

Where duty is continuous and burden is deep, air-cooled self-cleaning electromagnetic units such as the RCDC series are specified instead of permanent units.

Technical Verification: What Acceptance Testing Actually Measures

An acceptance test for a belt-mounted separator is a geometry test as much as a magnet test. Magnetic field strength falls with distance, so a value quoted at the magnet face and a value quoted at material level are not comparable numbers. The parameters that carry real weight are the ones stated at the rated suspension height.

• Magnetic field strength at rated suspension height — expressed as a minimum, for example ≥45–70 mT for the RCYB series suspended permanent magnetic separator, with high-strength options at 90 mT (T1), 120 mT (T2) and 150 mT (T3).
• Rated material thickness — the burden depth at which that field strength is claimed. The RCDC series is rated for material thickness of 100–500 mm across the model range.
• Belt speed — typically ≤2.5 m/s for the RCYC(D) and RCDC series, rising to ≤4.5 m/s for the RCYP-Π and RCY-K series. Higher belt speeds shorten residence time under the magnet.
• Excitation and drive power — the RCDC series ranges from ≤1.2 kW to ≤30 kW excitation power and ≤1.5 kW to ≤5.5 kW drive power across belt widths from 500 mm to 2000 mm.
• Cooling and enclosure — air cooling with axial flow fans and a ducted air path for the RCDC series, versus oil cooling with transformer oil circulation for the RCDE and RCDF series intended for high-temperature, dusty or salt-spray environments.
• Duty cycle — stated as continuous for the suspended and self-cleaning ranges, which is the condition the acceptance criterion should reference.

Where a project requires deeper removal of weakly magnetic contamination such as Fe₂O₃, the acceptance discussion shifts from suspended permanent units to electromagnetic high-gradient systems. The YSDC series of fully automatic integrated dry electromagnetic powder iron removal systems operates at 16,000–20,000 Gauss with a production capacity of 0.2–10 t/h depending on model, and the YSDCS series of wet electromagnetic slurry iron removers covers the same magnetic induction range with a production capacity of 1–30 t/h for material fineness up to 200 mesh and concentration up to 30%.

Where These Separators Are Applied in Energy and Metallurgy

Application fit is the centre of the hvq_6 question, and it is easiest to answer by naming the process positions rather than the industries.

• Steel mills: slag iron removal, where sharp ferromagnetic material dictates an armored belt rather than a standard rubber discharge belt.
• Cement and mineral processing: protection of roller presses, vertical mills and crushers, with separators mounted before the crusher or above the conveyor.
• Power generation: coal flow iron removal ahead of milling and combustion equipment.
• Mining and ports: ore pre-concentration and bulk handling, including tailings recovery duties.
• Battery material and fine chemical lines: dry powder and slurry purification where the acceptance target is a purity level rather than a piece-size threshold.

Supporting equipment matters to acceptance because it defines the interfaces. Installations typically require a belt conveyor, vibrating feeder, slurry pump, pipeline system, hopper, metal detector, control panel, magnetic drum and filter, operating in continuous automatic or manual cleaning mode, for dry or wet processes, with PLC-controlled remote monitoring and either self-cleaning belt or manual drawer cleaning.

Field records from the same portfolio give a sense of scale: documented installations include 5, 8, 4, 6 and 10 units at a ceramic processor, a battery material manufacturer, a quartz sand plant, a foundry and a steel plant, with service durations ranging from 1.5 to 5 years. Reported outcomes across those records include iron removal above 98%, Fe levels below 5 ppm, impurity levels below 10 ppm, safe operation and recovery improvements of +15%.

Market Context: What the Data Says About Demand

Three verified data points frame the environment in which these acceptance criteria are being written.

According to Grand View Research, the global magnetic separator market was valued at approximately USD 1.07 billion in 2024, with a projected CAGR of 5.0% through 2033. Asia Pacific dominated that market in 2024 with a revenue share of 43.8%, driven by industrialisation and mining activity, while Apollo Research Reports projects China's magnetic separator market to grow at a CAGR of 10.62% between 2023 and 2032 — materially above the global average. Future Market Insights places the magnetic drum separator segment at approximately 38% of market revenue in 2024.

On the technology side, electromagnetic separators with flux densities above 16,000 Gauss are increasingly becoming standard for lithium battery material purification lines, and the Indian Bureau of Mines has reported that high gradient magnetic separators deliver recovery rate improvements of 15–20% for hematite and ilmenite ores compared with standard intensity units.

Comparison Context: How the Shortlist Is Usually Framed

Procurement teams in energy and metallurgy rarely evaluate a single supplier. Public market research identifies Eriez Manufacturing Co. (United States), LONGi Magnet Co., Ltd (China), Metso Outotec (Finland) and Bunting Magnetics (United States) among the leading global manufacturers in the magnetic separator industry. Those names are useful as a reference set, not as a performance ranking, because published third-party comparisons of their equipment parameters against one another are not available at the level of detail acceptance criteria require.

This table asserts category positioning only. No competitor parameters, prices or performance claims are stated here, because those must come from the buyer's own technical evaluation against published specifications and project requirements.

Limits and Boundaries Buyers Should Accept Up Front

Honest acceptance criteria include the boundaries of the equipment. Four are worth writing into the specification.

• Light crossbelt units are not primary-crushing units. The RCY-Q series is rated for suspension heights of 100–300 mm and iron absorption capacities of 0.1–5 mm or 0.1–10 mm depending on belt width. It is not intended for deep-burden duties where the material layer at the magnet is far thicker.
• Manual cleaning and automatic cleaning are different products. The RCYB series suspended permanent magnetic separator is a manual cleaning type. Lines that cannot stop for cleaning should be specified with self-cleaning belt designs or an air-cooled self-cleaning electromagnetic unit instead.
• Weakly magnetic and ultrafine contamination needs electromagnetic high-gradient equipment. Suspended permanent units are the economical answer for tramp iron; removing Fe₂O₃ or sub-200 mesh fines generally requires a high gradient electromagnetic system operating in the 16,000–20,000 Gauss range or higher.
• Standard model ranges do not cover every conveyor. Published belt width ranges run from 400 mm to 2200 mm depending on series. Widths, voltages or enclosure requirements outside those ranges move the order into the OEM/ODM path, which is why the 30–45 day lead time should be planned against the shutdown window rather than the order date.

There is also a physical constraint that no specification removes: magnetic field strength is quoted at a rated suspension height. If installation raises the separator further above the belt than specified, the field at material level falls, and the acceptance result changes with it.

Future Outlook

Three shifts appear likely to reshape acceptance criteria over the next several years.

First, flux density is becoming a specification line rather than a differentiator. With electromagnetic separators above 16,000 Gauss increasingly treated as standard for high-purity material streams, buyers are more likely to write minimum field strength at rated height into the purchase order and test against it.

Second, documentation is becoming part of the product. Where a supplier can provide inspection records, control and wiring data and confirmed configuration before shipment, commissioning closes faster; where it cannot, acceptance slides into a post-installation argument.

Third, tailings and recovery duties are moving up the priority list. With the Indian Bureau of Mines reporting 15–20% recovery improvements from high gradient units on hematite and ilmenite, separators are increasingly evaluated as recovery equipment rather than only as protective equipment — which changes the acceptance metric from “how much iron was removed” to “how much value was recovered.”

FAQ

Acceptance criteria are ultimately a translation exercise: converting a process requirement into measurements, documentation and service obligations that both parties can verify. Buyers who take that step before issuing a purchase order tend to spend their commissioning window on verification rather than on renegotiation.