Drum sieve

Types of Drum Sieves

A drum sieve refers to a type of industrial sifting equipment often used in the separation of solid particles. It is made in a cylindrical shape and further rotated to facilitate the screening process of varied materials. There are two main kinds of drum sieves: the perforated drum sieve and the patch drum sieve.

• Perforated drum sieves: This sieve features a perforated cylinder. Additionally, it is manufactured with a fixed frame and feeding chutes. The sieve then moves over a receiving conveyor. This type of drum sieve is supported by roller bearings or often trunnioned on the side. It is widely used in the oilseed industry to separate oil, meal, and seeds.
• Patch drum sieves: Also known as the non-perforated drum sieve, it incorporates screens attached to a cylindrical framework. The screens are made of diverse materials with different mesh sizes. In some situations, patch drum sieves can be upgradeable to drift-separation units. This means they can easily be mounted on a frame without the support of a drilling unit. Consequently, enabling the sieve patches to float within the conveying air stream. This enables it to attain a higher separation efficiency. Additionally, the patch drum sieves can be used in various fields to separate solids from liquids or different solid mixtures.

Generally, a rotary drum sieve works by feeding the material to be screened into the rotating drum, either through gravity or a belt feeder. The drum then rotates around its horizontal axis, causing the material to stratify as the larger particles are filtered out through the screen openings while the smaller ones pass through the sieve.

Specification & Maintenance

The specifications of a drum sieve may vary according to the manufacturer and the use that it is going to be given. Usually, the parameters include the material of manufacture, type, mesh aperture, power, capacity, among others.

In the following lines, some key features of the drum sieve are revealed.

• Material of manufacture: Usually, the industrial trommel screen is manufactured in stainless steel or carbon steel, depending on the demands of the customer. When the material used for the sieve is carbon steel, it is usually painted with anti-corrosive paint to extend the useful life of the equipment.
• Type: Drum sieves can be classified into different types according to the separating principle. One of the most common is the trommel, which relies on the rolling movement of the drum.
• Mesh aperture: The mesh aperture of the sieve can be variable according to the class of material to be separated. The aperture can go from 0.5 mm to 50 mm. Sometimes it can be even more extensive, such as when separating stones in a quarry.
• Power: The power that drives the trommel drum also varies. Generally, it can be from 2 HP to 40 HP. In some cases it can be much more.
• Capacity: The capacity of the trommel drum sieve also varies according to the size and the power that drives it. Generally, the smaller ones can separate from 1 to 10 tons per hour, and the biggest ones can separate up to 200 tons per hour or more.

Usually, when it comes to industrial sieves, maintenance is mostly periodic inspections. Operators should pay attention to bolts and fittings to see if any of them need adjustment or maintenance. Also, they should inspect the trommel drum for cracks, corrosion, or damage. If there are any, they should sort them out immediately. The trommel drum has to be lubricated regularly. The friction that power transmission elements have requires them to be oiled or greased according to the manufacturer's instructions. Lubricate the bearings, seals, and other moving parts.

V-belts and other transmission elements should also be inspected periodically for wear or looseness. They should be adjusted or replaced if necessary. The power of the motor should be checked from time to time as well as the drums'revolution. Manufacturers usually supply instructions with the recommended motor power and drum speed for the trommel to operate efficiently. They should be followed to ensure that the sieve works appropriately and to avoid excessive wear and tear of the trommel's parts.

If the sieve is exposed to the elements, such as rain, snow, or sun, it ought to be covered to prevent damage outlined in the previous paragraph. Businesses that have undergone sieve inspections for corrosion because it's common for these devices to suffer from corrosion due to chemical reactions facilitated by humidity and temperature.

Usage scenarios of drum sieves

• Construction industries: Fracture drum sieves are beneficial to the construction industry. They have various applications, like screening stones, gravel, sand, or other aggregates used for construction. The open-hole drum sieve also separates diverse building materials, including wood chips, packaging materials, or insulation fibers.
• Food industry: A metal drum sieve can separate unconsumed raw materials or spoiled food, thus preventing unnecessary waste. Food drum sieves also play a vital role in the processing and production of food. Breweries use them to screen hops and other solid residues during beer production. Bakeries use them for grain screening and flour refining.
• Chemical industry: In chemical production and processing, chemical drum sieves can isolate solid and liquid phases, suppress impurities, and enhance product quality. For example, in pharmaceutical production, they can filter out valuable drugs for encapsulation and packaging. In the pigment manufacturing industry, they can be used to sift pigments and dyes.
• Environmental management: Drum sieves also have a significant role in environmental management. Waste treatment facilities use them to sort municipal solid waste. By isolating recyclable materials like plastics, metals, and paper, they can enter the corresponding recycling procedures.
• Agricultural production: Agricultural factories utilize drum sieves for seed screening and soil classification.

How to choose drum sieves

Business buyers need to consider several factors when choosing drum sieves for industrial applications. They should start by identifying the materials and applications for which they intend to use the drum sieves. Different industries use drum sieves for different purposes, so the buyer needs to get a sieve that will satisfy their specific need.

Next, buyers need to consider the separation characteristics of the drum sieves they want to purchase. The mesh size and filter surface of the drum sieves they are choosing will have an impact on the desired separation. When considering the characteristics of the drum sieve, the buyer needs to put the sieve's effectiveness, available filter surface, and particle size into careful consideration.

Buyers need to check the construction material of the drum sieve they want to choose. The construction material affects the durability and compatibility of the drum sieve. Buyers should get drum sieves constructed with materials that are suitable for their applications and corrosive conditions.

Buyers need to consider the operation and maintenance requirement of a drum sieve before choosing one. Different drum sieves have different operational complexities and maintenance requirements. Therefore, after considering the operation and maintenance requirements of the drum sieve candidate, buyers should choose to purchase those that can be integrated successfully into their workforce and maintenance system.

More importantly, buyers need to consider their sieves' integration and scalability features. The functionality, capacity, and flexibility of the industrial drum sieves filtering capabilities are essential to consider when choosing the sieves. Buyers should look for a drum sieve that can integrate with existing systems and, at the same time, have expandable features so it can adapt to future needs as their business grows.

Finally, buyers must consider the supplier reputation. They should choose reputable suppliers that have a good track record. This ensures that the buyers have a drum sieve that offers performance and reliability according to industry standards.

Drum Sieve Q&A

Q1: What is the difference between a drum sieve and a rotary drum screen?

A1: The drum sieve is designed to separate solid particles from liquids. There may be varying mesh sizes to achieve different outcomes. On the other hand, the rotary drum screen is mainly used in wastewater treatment. It separates solid materials from water. Also, the rotary drum screens can be used to separate oversized materials in the mining industry.

Q2: Can a drum sieve be repaired after it is damaged?

A2: Yes, a drum sieve can be repaired after damage. The parts that are damaged can be replaced, including the frame, rollers, and mesh. In some cases, the drum may be repaired if the damage is minimal.

Q3: What are some safety precautions to take when using a drum sieve?

A3: Always wear safety gear, including goggles, earmuffs, gloves, and a mask. The drum sieve operates at high speed and can throw out dust and debris. Therefore, it is better to be cautious and avoid all risks. Ensure all safety guards are in place before operating the sieve.

Q4: Can a drum sieve be automated?

A4: Yes. In fact, many modern drum sieves are automated. They are fitted with a feeding system to help streamline operations. Automation helps improve productivity and efficiency in the industry.