China permanent magnetic separator

China permanent magnetic separator is not just equipment for removing ferromagnetic impurities. This is a precision tool that solves three problems at the same time: protects crushing and grinding plants from damage, increases the purity of the final product by 92–98%, and reduces downtime of production lines by 35–60%. We have seen this in 17 projects over the past two years - from cement plants in Kazakhstan to processing complexes in Belarus.

Why “permanent” is not a synonym for “simple”

Many buyers believe: “since there is no power supply, that means there is no need for setup.” This is a dangerous misconception. A permanent magnetic separator works due to the residual induction of NdFeB magnets, but its effectiveness depends not on one parameter, but on four interrelated ones:

• Magnetic field gradient- not just force, but the rate of its decline by 1 mm. For weak structures, the gradient drops by 40% already with a gap of 3 mm. For proven solutions - no more than 12%;
• Work area shape— flat plates only work with thin layers of material (up to 25 mm). High bulk density flows require semi-circular or V-shaped dies;
• Material flow rate— when exceeding 1.8 m/s, even a strong magnet loses 30% of its grip. In real conditions, we always measure the speed of the belt or chute before making calculations;
• Temperature stability— NdFeB loses 0.11% magnetization for every degree above +80 °C. In production with high heat generation without thermal compensation, the service life is halved.

This is why we abandoned universal solutions back in 2015. EveryoneChina permanent magnetic separator, supplied to the EAEU, is adapted to the specific fraction, humidity and temperature of the raw material.

What breaks most often - and how to avoid it

In 68% of cases, the decrease in efficiency is not due to the magnet, but due to three hidden factors:

1. Accumulation of “magnetic sludge”- when the particles are magnetized and form a dense layer on the surface. It blocks the incoming flow and reduces the holding force. Solution: automatic self-cleaning at intervals of 3–15 minutes, depending on contamination;
2. Incorrect gutter angle- at an angle of less than 22°, the material “sticks”; at an angle of more than 38°, it flies out of the coverage area. The optimal range is 25–32°;
3. No pre-screening— particles larger than 80 mm create turbulence and screen small impurities. We always recommend installing a separator after the screen with a cell of 25x25 mm.

At one plant in Uzbekistan, after the implementation of these three rules, the time between technical inspections increased from 48 to 216 hours. Simply because they began to eliminate the cause, not the effect.

How to choose - without overpayments and compromises

If you are comparing offers, pay attention not to the brand of the magnet, but to three documents:

• Test certificate in real conditions- not a laboratory protocol, but a report indicating: the mass of the starting material, operating time, amount of collected impurities, ambient temperature;
• Certificate of conformity GOST R ISO 9001— it confirms that the production process is controlled, and not just the final product;
• Warranty card linked to serial number— for reliable manufacturers, the warranty begins not from the date of shipment, but from the date of commissioning (confirmed by a certificate).

LONGI Corporation has been producing such solutions since 1993. The Fushun plant occupies 140,000 m² and employs more than 1,200 people, 60% of whom are engineers with higher education. 4,000 units of equipment are produced annually. EveryoneChina permanent magnetic separatorgoes through 7 stages of control: from checking the coercive force of magnets to testing on a vibration stand at a frequency of 35 Hz for 4 hours.

The future is adaptability, not power

Today's market demands not stronger magnets, but smarter systems. We are seeing three trends:

• MES integration— separators with RS-485 and Modbus RTU modules are already supplied to enterprises where downtime is recorded in real time;
• Modularity— the ability to replace one section of the magnetic matrix without stopping the entire line saves up to 11 hours per month;
• Digital diagnostics— temperature and vibration sensors warn of deviations 72 hours before possible failure.

China permanent magnetic separator is no longer a “black box” on the tape. It is part of the digital quality loop. Its task is not to remove iron, but to ensure that each ton of product meets the declared purity class. Detailed technical specifications, connection diagrams and calculation examples are available on the websiteljmagnet.ru.