Organic fertilizer drum type screening machine

Table of Contents

• How Does This Screener Actually Work?
• The composition structure of the screening machine
• Why Is Screening So Important for You?
• Definition and Function
• Installation and commissioning of drum screening machine
• Parameter table of drum screening machine
• Can It Handle My Sticky Materials?
• Successful case of drum screening machine
• The price and market of drum screening machines
• Application scope of drum screening machine
• Where Does It Fit in My Production Line?
  • Position 1: After Composting (Pre-Screening)
  • Position 2: After Granulation and Drying (Final Screening)
• Frequently Asked Questions (FAQ)
• Introduction to Fude Machinery Company

How Does This Screener Actually Work?

The machine works by tumbling material inside a large, gently sloped, rotating cylinder or “drum” that is lined with a screen. Smaller particles fall through the screen holes, while larger particles travel down the length of the drum and exit at the end.

The principle behind the Rotary Drum Screener, sometimes called a trommel screen, is very simple and effective. We designed it for high efficiency and extreme durability. Imagine a long, hollow pipe made of screen mesh, tilted at a slight angle and spinning slowly.

• Feeding the Material: Raw material, like finished fertilizer granules, is fed into the higher end of the drum.
• Rotation and Tumbling: As the drum rotates, it gently lifts and tumbles the material. This constant motion does two things. First, it prevents the material from clogging up. Second, it makes sure every single particle comes into contact with the screen surface many times.
• Separation by Size: The screen is made with holes of a specific size, for example, 4 millimeters. Any particle smaller than 4mm will fall through the screen onto a conveyor belt below. This is your finished, correctly sized product.
• Discharging Large Particles: Any particle larger than 4mm cannot pass through the holes. Because the drum is tilted, these oversized particles slowly travel down the length of the drum and exit at the lower end. These particles are then sent back to your fertilizer crusher to be broken down again.

We can also build multi-stage screeners. These have different screen sizes along the drum’s length, allowing you to separate your material into three or four different sizes in a single pass.

The composition structure of the screening machine

• Motor: Provides power source.
• Reducer: Reduce the speed of the motor to a speed suitable for drum screening work.
• Drum device: The core component adopts a cylindrical structure, with a mesh installed inside to achieve material screening through rotation.
• Framework: The structure that supports the entire equipment, welded from steel plates and channel steel.
• Sealing cover: prevents dust leakage generated during the screening process, protects the environment and the health of operators.
• Import and export: used for the input of materials and the discharge of screened materials.

Why Is Screening So Important for You?

Screening is critical because it directly controls the quality and value of your final product. It also makes your entire production line more efficient by eliminating waste and creating a closed-loop system.

Without a good screening process, you are leaving money on the table. A Rotary Drum Screener provides three huge benefits that go straight to your bottom line.

• Guarantees Premium Product Quality

Your customers want a uniform product. Granules that are all the same size look more professional, are easier to package, and spread more evenly on fields. A bag of fertilizer with dust, powder, and giant lumps looks cheap and is difficult to use. By separating out the perfectly sized 2-4mm granules, you create a premium product that you can sell for a higher price.

• Creates an Efficient, No-Waste System

A screening machine is the key to an efficient production loop.

versized Granules are not waste. They are sent back to the crusher and then returned to the fertilizer granulator.

Undersized Fines (dust and small particles) are also not waste. They are sent directly back to the granulator to be reformed into new granules.
This means that 100% of your raw material eventually becomes a saleable product.

Definition and Function

Installation and commissioning of drum screening machine

Parameter table of drum screening machine

model	Diameter (mm)	Speed (r/min)	Power (kw)	Output (t/h)
GS 1.0*3.0	1000	22	3	1.5-2
GS 1.2*4.0	1200	17	4	2-3
GS 1.5*6.0	1500	14	5.5	3-5
GS 1.8*6.0	1800	13	7.5	5-8

Can It Handle My Sticky Materials?

Yes, our Rotary Drum Screeners are specifically designed to handle wet, sticky materials like fresh compost or high-moisture fertilizer without clogging. We include a built-in, automatic cleaning device.

This is a very common problem that we have solved. Many producers know that trying to screen wet compost or sticky granules can be a nightmare. The screen holes quickly get plugged with material, a problem called “blinding.” When the screen is blinded, nothing can pass through, and the machine stops working effectively.

To prevent this, we equip our Rotary Drum Screeners with a cleaning mechanism.

• Cleaning Brush: For many applications, a long, rotating nylon brush is positioned on top of the drum. As the drum turns, the brush actively cleans the screen holes, pushing out any material that tries to stick.
• Tapping Hammer: In other designs, a series of small hammers continuously tap on the outside of the screen. This vibration is enough to dislodge any sticky particles and keep the screen mesh clear.

This feature means you can screen your material at the ideal moisture level for your process without worrying about constant stops to clean the machine. It ensures consistent performance and high throughput, even with difficult materials.

Successful case of drum screening machine

The price and market of drum screening machines

The price of organic fertilizer drum screening machine varies depending on factors such as brand, model, and specifications. In the market, there is a significant price difference for equipment provided by different manufacturers, and consumers can choose the appropriate equipment based on their own needs and budget.

Application scope of drum screening machine

Organic fertilizer drum screening machine is widely used in the screening work of livestock and poultry organic fertilizer fermentation, straw, sugar residue, mining, building materials and other industries, especially suitable for the grading screening of organic fertilizer.

Where Does It Fit in My Production Line?

A Rotary Drum Screener is used in two main places in a fertilizer production line. You can use it right after composting to prepare raw material, or at the very end of the line for final product quality control.

The placement of your screener depends on your goal. Both positions are essential for creating a high-quality product in a complete fertilizer production line .

Position 1: After Composting (Pre-Screening)

After your raw organic material has been fully composted using a compost turner , it often contains large, non-composted items like wood chips, stones, or plastic.

• Why screen here? Screening the compost before it enters the rest of your process is a critical first step. It removes these contaminants, which protects your more delicate machines like crushers and granulators from damage.
• The Result: You get a fine, uniform organic powder that is perfect for mixing and granulation.

Position 2: After Granulation and Drying (Final Screening)

This is the most common and most important use for the screener. It is the final quality control checkpoint before bagging.

• Why screen here? The granulation and drying process never produces 100% perfectly sized granules. You will always have some that are too big and some that are too small.
• The Result: The screener separates the final product into three streams: the perfect granules (to packaging), the oversized granules (back to the crusher), and the undersized fines (back to the granulator). This ensures every bag you sell contains only the best product.

Frequently Asked Questions (FAQ)

Question 1: What is the difference between a rotary screener and a vibrating screen?
A Rotary Drum Screener is better for bulk materials and can handle higher moisture content. It is perfect for compost and fertilizer granules. A vibrating screen shakes a flat screen deck and is generally used for finer, drier powders where very precise separation is needed.

Question 2: How do I choose the right screen mesh size?
The mesh size depends entirely on your target product specification. The most common size for standard fertilizer granules is a range of 2mm to 4mm. We will work with you to select the precise mesh size to meet your market’s needs.

Question 3: What kind of maintenance does this machine need?
It requires very little maintenance. Because of its simple design and slow rotation speed, wear and tear is minimal. You will just need to perform regular lubrication of the bearings and support rollers and occasionally check the screen for any signs of wear.

Question -4: Can I change the screen to make a different product size?
Yes. The screen sections on our machines are designed to be replaceable. You can easily unbolt an old screen section and install a new one with a different hole size. This gives you the flexibility to produce different product grades with a single machine.

Introduction to Fude Machinery Company

The production equipment includes: fermentation raking machine, dryer, granulator, crusher, mixer, round throwing machine, organic fertilizer production line, etc. The company will continue to adhere to the business philosophy of “quality first, customer first” and provide higher quality metal equipment solutions for global customers.
Since its establishment in 2015, Fude Machinery has been committed to providing high-quality and high-performance metal equipment solutions to global customers. With advanced production technology, strict quality control, and continuous innovative research and development capabilities, we have received customer satisfaction praise.