Trommel Screen

Introduction to Trommel Screen

A trommel screen is a sorting machine commonly used in various industries, including aggregates production. It is designed to separate waste materials based on particle size, providing high sorting accuracy.

The trommel screen consists of a cylindrical body divided into sections, tailored to specific requirements. The sections usually have sieve holes arranged in increasing size, with each section having the same size of sieve holes.

The trommel screen is an effective tool for controlling the separation of particles, allowing for efficient sorting of different materials based on their size. Its versatility and accuracy make it a valuable machine in industrial settings and aggregates production.

How to Select a Suitable Trommel Screen?

The screen

The selection of a trommel screen involves considering two main factors: the production process of the screen and the size of the screening hole.

There are two common types of screens used for trommel screens: knitting screens and punching screens. Knitting screens are typically made of round steel with uniform wire diameter. However, if the material being screened has a high proportion, it can lead to screen deformation and material leakage. Knitting screens are also more complex to produce, resulting in higher costs and maintenance expenses.

On the other hand, punching screens are made of ordinary carbon steel or stainless steel. They have a simpler production process and are designed with bent punching plates and solid joint interfaces for increased durability. As a result, trommel screens equipped with punch plate screens are the preferred choice in the market.

The size of the screening hole is crucial and should meet the specific screening requirements. Conducting material tests or providing information about the material size to professional engineers can help determine the appropriate screen hole size for optimal performance.

Converter

The converter used in the trommel screen must enable proper operation. During the co-rotation of the screen cylinder, the converter should ensure smooth and normal co-rotation, without any reverse rotation. It is important to avoid reversing the rotation of the screen body abruptly, as this can lead to motor short-circuiting or severe deformation of the screen body. Instead, deceleration should be performed gradually to ensure that the screen body remains stationary when reverse rotation occurs. This precaution is essential for maintaining the integrity and functionality of the trommel screen.

The screening effect of the trommel screen

The screening effect of a trommel screen is an important consideration when selecting one. While the rotation speed of the screen barrel is often emphasized by first-time buyers, it is equally important to assess the efficiency of the screen in terms of its screening capabilities.

To evaluate the screening effect of a trommel screen, it is recommended to bring a sample of the material to the factory for testing. During the test, you can observe the screening efficiency, the discharge of screened material, and whether any blockages or clogging occur. These factors will provide a clear understanding of the trommel screen’s performance and suitability for your specific screening needs.

In addition to the screening effect, there are several other factors to consider when choosing a trommel screen. These include the type and characteristics of the material to be screened, the desired output requirements (such as particle size and capacity), the working environment (including factors like temperature, humidity, and cleanliness), and the expected working period (whether it will be used continuously or intermittently).

To ensure an optimal selection, investors are advised to consult with engineers or industry experts who specialize in trommel screens. Their expertise can help minimize time wasted on trial and error, and ensure that the chosen trommel screen meets the specific requirements and conditions of the application.

Applications of Trommel Screen

Trommel screen is aimed at grading various sticky and wet materials like refractory materials, coal, sand stone, coke, lime, gold sand, and so on. The finished product has uniform size to meet the production requirements.

It plays an important part in electric power, mining, coking plants, cement production, ore beneficiation, metallurgy, building materials and chemical industry and any other industrial areas.

Trommel screen separate materials into different sizes of particles

Here are some specific examples of its applications.

1. Stone material factory: Trommel screens are used to grade different sizes of stones and separate soil and stone powder.
2. Sand production line: Trommel screens are instrumental in separating sand and stone in the production process.
3. Coal industry: Trommel screens are commonly used to separate coal blocks and coal powder, as well as in the coal washing process.
4. Chemical industry and ore beneficiation: Trommel screens are utilized for grading different particles and separating powder from blocks in these industries.

Applications of Trommel Screen

Performance Benefits

• Strong Adaptability and Wide Application: Trommel screens are highly adaptable to various material types, including sticky, wet, dirty, and miscellaneous materials. They can be used in industries such as mining, building materials, transportation, energy, and chemical industry for efficient product classification.
• Low Noise, High Efficiency, and Environmental Protection: Trommel screens are designed to minimize operational noise, meeting national standards. They also produce less dust pollution while achieving high screening efficiency, resulting in cost savings and environmental protection.
• Advanced Lubrication System for Long Service Life: Trommel screens employ an advanced lubrication system that ensures convenient and fast lubrication, effectively extending their service life. The system covers key components, such as rotating bearings, roller bearings, gears, movable bearings, and sliding planes.
• Small Installation Angle for High Screening Efficiency: Trommel screens are installed at a small angle, allowing sufficient material retention time during operation. This maximizes the screen’s effectiveness while maintaining work efficiency.
• Customized Solutions by Professional Engineers: With a team of experienced engineers, trommel screens can be customized to meet the specific needs of different customers. This includes various specifications and vibration modes tailored to specific requirements.
• Easy Inspection, Maintenance, and Operation Stability: Trommel screens are designed with simplified structures to facilitate daily inspection and maintenance. Additionally, the cylinder of the trommel screen can be closed, enhancing operational stability and maximizing return on investment.

Zoneding Trommel Screen in Different Customer Sites

Working Principle

A trommel screen typically operates in conjunction with a crushing machine and a belt conveyor. The raw materials that have been crushed are fed into the trommel screen.

The first step is to tilt the rotary trommel on its rack. The motor is connected to the drum device through a reducer and shaft coupling, which drives the drum device to rotate around its axis. As the material enters the drum device, the drum’s tilt and rotation cause the material on the screen surface to be turned over and rolled.

Under the influence of gravity, the properly sized material (which is smaller than the screen openings) will be discharged through the outlet at the bottom end of the drum, while the material that does not meet the desired size criteria (which is larger than the screen openings) will be discharged through the outlet at the end of the drum.

The rotation and rolling of the drum enable any material that becomes stuck in the sieve holes to be ejected, thereby preventing blockages in the trommel screening machine.

This working principle ensures the effective separation and classification of materials based on their size, allowing for the desired product to be obtained while preventing any unnecessary material from passing through the screen.

Zoneding Trommel Screen Shipment and in the Workshop

Common Faults of Trommel Screen and According Solutions

While the trommel screen has a simple structure and low maintenance costs, customers may encounter some operational issues due to a long service time, operator unfamiliarity, or other factors. Based on customer feedback and experience, Zoneding engineers have compiled a list of common failures and their corresponding solutions for trommel screens.

Screen Blockage: Material getting stuck in the screen holes, leading to reduced screening efficiency or even a complete blockage.
Solution:

Regularly inspect and clean the screen surface to remove any debris or obstructions.
Adjust the inclination angle of the trommel screen to facilitate the free movement of materials down the screen.
Optimize the feed rate to prevent overloading and ensure smooth material flow.
Uneven Discharge: The trommel screen discharging material unevenly, resulting in the accumulation of material on one side.
Solution:

Check and adjust the drum device’s level and stability.
Examine the alignment of the trommel screen with the belt conveyor to ensure a smooth transfer of material.
Inspect and adjust the tension of the drive belts to maintain a consistent rotation speed.
Excessive Noise or Vibration: Unusual noises or excessive vibrations during operation, which may affect the stability and performance of the trommel screen.
Solution:

Inspect and tighten all bolts and connections to ensure proper assembly and minimize vibration.
Check for any worn or damaged components, such as bearings or rollers, and replace them if necessary.
Adjust the drum device’s balance to reduce vibrations and noise.
Low Screening Efficiency: The trommel screen fails to achieve the desired level of screening efficiency, resulting in poor separation of materials.
Solution:

Ensure that the screen is properly tensioned and securely fastened.
Regularly inspect and clean the screen surface to remove any buildup or clogging.
Adjust the drum rotational speed and inclination angle to optimize the screening process.
By addressing these common faults and implementing the suggested solutions, operators can ensure smooth and efficient operation of trommel screens, maximizing their performance and lifespan.

Faults	Causes	Solutions
Poor-quality finished product from trommel screen	Screen hole is blocked.	Clean the screen hole regularly
Low screen efficiency	The material is of high moisture.	Dewater the material ahead of time or increase the mesh of the screen hole.
Low rotating speed of the trommel screen	The conveyor belt is loose.	Adjust the equipment transmission belt tightness timely to avoid harm to the machine service life.
Hot bearing	The bearing needs to be oiled or cleaned.	Regularly clean and oil the bearing, replace the seal and check if the oil to the bearing meets the standards or not; replace the bearing if it is worn out seriously.
Locked trommel screen roller	The seal sleeve maybe blocked.	Clean the shaft sleeve
Irregular noise of the rotating trommel screen	Tightness degree of screen tightness, wearing degree of bearing, bolts to hold the parts, etc.	Pay regular check to screen, the bearings, bolts and other parts and timely adjust them according to standards.

Zoneding Trommel Screen in Beijing Customer Site

Trommel Screen Manufacturer

Zoneding Machine, with over 40 years of experience in mineral processing technology research, is a reputable manufacturer specializing in the production of various types of trommel screens. Their trommel screen design incorporates a mature production concept and benefits from the expertise of a dedicated technical research and development team, ensuring the creation of high-quality trommel screen equipment.

Being a professional trommel screen manufacturer, Zoneding Machine offers authentic and competitive equipment quotations, making it an excellent choice for those seeking affordable trommel screens.

General Specification

Model	Yield(m³/h)		Power (kw)
	Sieve hole(2mm)	Sieve hole(30mm)
YTS1230	12	100	5.5
YTS1240	14	120	5.5
YTS1250	15	140	5.5
YTS1530	18	150	5.5
YTS1540	18	150	7.5
YTS1550	20	180	11
YTS1560	22	200	11
YTS2040	25	250	15
YTS2050	30	300	15
YTS2060	35	350	18.5

Please note that the information provided is subject to change due to advancements in technology. Zoneding Machine reserves the right to modify the data without prior notice. Additionally, the performance of the machines may vary depending on the specific application. To obtain more detailed and up-to-date information, it is recommended to engage in an online chat with Zoneding engineers.