Causes and solutions to handle material jamming in the crusher

During the operation of the crusher, material jamming or clogging often occurs. It seriously affects production capacity, equipment life and operating efficiency. Through many years of practical observations at crushing stations, it can be seen that operating errors, inappropriate material selection or installation errors are the main causes of this phenomenon.

The article below will analyze the causes and propose solutions. Help businesses overcome the problem of material jamming in the crusher. Ensure stable operation of the production line, optimizing production efficiency.

1. Main causes of material jamming in the crusher

1.1 High humidity and adhesion of raw materials

The most common cause of mill jamming is the high moisture content of the input material. When the raw materials have a high water content, they easily stick together and stick to the internal parts of the mill. This is especially serious with the lines cone crusher, jaw crushing, and VSI crusher.

For example, in the process of crushing limestone or clay with high moisture content, small particles are easy to stick to the crushing hammer, crushing jaw or lining plate, forming a layer of hard material that causes the machine to operate inefficiently or stop completely.

1.2 High viscosity or contains many impurities

Some natural stones have a high clay content or contain many organic impurities, which increases the viscosity of the material. When entering the crusher, these particles cannot separate from each other but form a sticky mass, leading to blockage in the crushing chamber.

This often occurs when crushing basalt or mudstone with a high clay content, reducing the material release capacity and increasing the risk of machine jamming.

1.3 Raw materials are overloaded or not suitable for the equipment

Each type of crusher has a limit on the size of the input material. If the material is too large or has the wrong shape, the machine will not be able to process it quickly enough. This leads to clogging.

For example, if jaw crusher Designed to handle maximum size rocks 500mm but input materials up to 700mm, it is very easy to get material stuck, overloaded or broken grinding shaft.

1.4 The discharge slot is smaller than necessary

Another important cause is that the discharge slot of the crusher is not adjusted properly. When the discharge slot is too small, the crushed material cannot be discharged quickly, causing stagnation in the crushing chamber. If not handled promptly, this situation will cause the machine to stop working. There is a possibility of increased risk of damage.

1.5 Errors in operation and maintenance

Improper operation or inadequate maintenance can also cause material jamming. Some common errors include:

• Do not check the moisture and size of the raw materials before grinding.
• Feeding raw materials too fast, exceeding machine capacity.
• Not cleaning the grinding chamber surface causes old material to stick and clog.

2. Solution to overcome material jam in the crusher

2.1 Controlling raw material moisture before grinding

To limit material jamming due to high humidity, it is necessary to raw material pretreatment process before being fed into the crusher. Some effective methods include:

• Use a vibrating screen to remove excess moisture.
• Dry the raw materials before grinding under suitable temperature conditions.
• Use industrial dryers for materials with high humidity levels exceeding the standard.

This is especially important in manufacturing. artificial sand, where small particles easily adhere if not first dehydrated.

2.2 Choosing the right type of crusher

Each mill line has Ability to handle various materials, so it is necessary to ensure that the input material matches the equipment specifications.

For example:

• Jaw crusher Suitable for large, hard, low clay materials.
• Cone crusher Works well with medium to high hardness rocks, but input size control is required.
• VSI Crusher is the optimal choice for creating artificial sand from granite, dry limestone.

2.3 Adjust the discharge slot appropriately

If the crusher is frequently clogged. Check and adjust the discharge slot within the appropriate range.

• For jaw crusher, the distance between the two crushing jaws should be adjusted. Ensure the material can be discharged easily.
• For cone crusher, it is necessary to check the opening of the discharge gate. Avoid material accumulation in the crushing chamber.
• With hammer mill, should monitor the wear of the sieve. Avoid the case of the sieve being clogged and causing material blockage.

2.4 Improve equipment operation and maintenance skills

Training of operators with specialized knowledge will help reduce errors in the grinding process. Operators need:

• Understand the power limits of the machine and do not exceed the load.
• Perform periodic maintenance to check the lubrication system and wear of the grinding parts.
• Regularly clean the grinding chamber to remove deposits, reducing the risk of material jamming.

3. Conclusion – Optimize operations to limit material jamming

Material jamming in the mill not only causes production interruptions. It also increases maintenance costs, equipment wear and tear, and reduces overall efficiency. Therefore, controlling raw material moisture, selecting the right specifications, providing intensive operator training, and adjusting the discharge slots properly are important solutions to optimize the grinding process.

If your business is having problems with material clogging in the crusher. Contact us immediately. Nguyen Vinh to get advice on the best solution for crushing and screening lines.

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