Measures about Reducing Mining Screen Plugging & Blinding

Material plugging often occurs in the use of mining screen. There are several reasons for screen plugging as the shape of material varies. We analyze the common reasons for plugging and their respective solutions. We hope this article can help you solve these problems.

Common Reasons for Screen Plugging

We consider that there are three main reasons for plugging and blinding after analysis.

The particle size of the crushed stone is similar to the size of the screen aperture
In the process of stone screening, such particles are stuck in the aperture and cannot pass through the screen smoothly, and cause screen plugging. This kind of plugging is also known as near-sized plugging.
Flat particles take a large proportion in materials due to crushing or the material itself
These flat particles cannot go through the screen smoothly. Besides, they also spread out and gather together, preventing other materials from screening and plugging the aperture.
The material contains much moisture or requires washing
On one hand, the fine particles are bonded together by water when the stone material contains a large proportion of mud or the material requires washing. On the other hand, the mud blinds the screen, resulting in the materials are hard to be screened and causing blinding.

Many particles are stuck in the aperture of the mining screen

Mining screen plugging

Mining screen blinding

Solutions

In order to effectively solve the above-mentioned problems, we can change the aperture structure of the mining screen to prevent plugging and blinding. Here are some measures that can prevent plugging and blinding.

Change the shape of the aperture from square to rectangular.

A piece of slot mining screen is displayed.

Under the premise of satisfying the construction requirements, we can adopt mining screens with rectangular openings such as slot wire mesh. For example, change the square aperture of 3.5 mm × 3.5 mm to the rectangular aperture of 3.5 mm × 4.5 mm. However, as the direction of aperture varies, it will certainly affect the screening efficiency or the service life of the screen to some extent. Generally, if the shapes of stone particles are relatively regular without much flat materials and the materials are dry without moisture, mining screens with rectangular apertures are recommended.

Adopt square self-cleaning screen.

A piece of square self-cleaning mining screen is displayed.

This kind of mining screen employs crimped wires with slight vibrations. All wires can vibrate independently from one another, thus achieving an excellent anti-clogging effect. If the stone grading requirements are high and many flat particles are required such as stone screening needed in highway asphalt pavement, square self-cleaning screen is your first choice.

Adopt supported square self-cleaning screen.

A piece of supported square self-cleaning mining screen is displayed

This screen also employs crimped wires with slight vibrations. However, a straight wire is added between two crimped wires to maintain the correct aperture size under heavy loads and high impact material screening. Supported square self-cleaning screen is also applicable to screenings with higher grading requirements. However, it is mainly used for screening stones with a particle size of 8 mm below.

Adopt wave wire self-cleaning screen.

A piece of wave wire self-cleaning mining screen is displayed.

The working principle of the wave wire self-cleaning screen is to use the vibration difference between the two wave wires to prevent blocking. If there are stone particles stuck in the middle of the two wave wires, the two wires will vibrate up and down respectively, allowing the particles stuck in the middle pass through smoothly, and achieving a great anti-blocking effect. For intermediate transitional screening, such as adding a secondary screening between the coarse screening and the fine screening, wave wire self-cleaning screen is highly recommended. This screen has higher screening efficiency and is suitable for screenings with much dust, for example the screening of tailings.

If the measures aforesaid cannot solve your problem, please contact our technicians or engineers, we will provide you with a custom technical solution.

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