How to Check the Magnetism Loss of a Permanent Magnetic Iron Remover?

release time:

2024-10-16

The permanent magnetic suspended iron remover is installed above the belt conveyor to remove mechanical iron such as iron filings and bolts mixed into quartz sand. However, many customers report that after a period of us

The permanent magnetic suspension iron remover is installed above the belt conveyor to remove mechanical iron such as iron filings and bolts mixed into quartz sand. However, many customers report that after the equipment has been used for some time, the iron-absorbing effect drops noticeably, and iron impurities above the belt still travel downstream. The problem is usually not the magnetic block itself, but the suspension height and material layer thickness.

永磁悬挂式除铁器现场.jpg

Excessive suspension height is the primary cause of poor iron-absorbing performance. The magnetic force of a suspension iron remover decays sharply as distance increases. When the suspension height exceeds 200mm, the magnetic force is basically ineffective on iron impurities at the bottom of the material layer. It is recommended to control the suspension height between 150-200mm, with the specific value adjusted according to belt width and material layer thickness. The inspection method is simple: place a few iron nuts on the belt and observe whether they can be picked up. If they cannot be picked up, the height is too high, and the suspension chain or bracket needs to be adjusted downward.

An excessively thick material layer can also cause iron impurities to be missed. When the material layer thickness exceeds 80mm, the magnetic force cannot reach iron filings buried in the bottom layer, and they directly enter the next process with the material. A leveling plate or distributor can be installed in front of the iron remover to control the material layer thickness at 50-80mm. When the feed rate needs to be increased, priority should be given to widening the belt or reducing belt speed, rather than simply piling the material layer higher.

Demagnetization of the magnetic block or seal damage can also cause a decrease in magnetic force. Permanent magnetic iron removers work for long periods in humid and dusty environments. After the seal ages, the magnetic block is affected by moisture and demagnetizes. Use a gaussmeter once a quarter to check the magnetic field strength on the magnet surface. If it drops by more than 20% from the initial value, open it up to inspect the seal and magnetic block condition, and replace demagnetized magnetic blocks in time.

During daily inspections, pay attention to whether the iron discharge port is unobstructed. If adsorbed iron filings accumulate too thickly and are not cleaned in time, magnetic shielding will form and affect subsequent adsorption performance. For equipment operation-related issues, you are welcome to call Shanlu Heavy Industry: Manager Zhang 13583776655 (same on WeChat).

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