Rotary Drum Granulator Machine

What is rotary drum granulator machine

Rotary drum granulator  is a fertilizer machine that can make material to a specific shape. It is one of the key equipment in compound fertilizer production. Our machinery designs this machine with many years of experience in fertilizer production. It has the characteristics of beautiful appearance, simple operation, low energy consumption, long service life, uniform drying, convenient maintenance, etc. This product is suitable for cold and hot granulation and the large-scale production of high, medium and low concentration compound fertilizers. More and more fertilizer manufacturers prefer to use it to produce fertilizer granules.

Rotary drum granulator machine for sale
Rotary drum granulator machine for sale

What is the structure of the rotating drum pelletizer

In order to meet customers’ granulation needs, our engineers racked their brains to design this rotary drum granulating equipment. It consists of five parts:

  • Bracket: The bracket supports the entire rotating part of the body, and the force is large. Therefore, the supporting parts of the drum pellitizer are all welded with medium carbon steel plate and channel steel. It has reached strict quality standards and special process requirements. So it has met the needs of this machine. In addition, what is more important is the roller on the shelf. Considering the large friction between it and the rolling belt of the body, our factory specially uses high-quality anti-corrosion and wear-resistant material. It greatly improves the service life of the drum pelleting machine. Moreover, our engineers design swivel hooks at the four corners of the supporting wheel frame, they are convenient for loading, unloading and transportation.
Rotary drum granulator manufacturing in SX
Rotary drum granulator manufacturing in SX

  • Transmission part: Transmission part is important because the whole body relies on it to work. The main motor and reducer installed on the transmission frame are both ISO national inspection-free products with reliable quality. The motor drives the belt pulley, the V-belt and the reducer, and transmits to the main shaft to make the machine work.
  • Big gear: It is on the body and engages with the transmission pinion to drive the body to work in the opposite direction. The gear adopts high-tech wear-resistant material, which makes the machine last longer.
  • Roll belt: It is fixed on both sides of the body to support the entire body.
  • Machine body: Drum  granulating machine makes use of high-quality medium carbon steel plate and special rubber plate or acid-resistant stainless steel plate as lining, which can archive automatic scar removal without the traditional scraper device.
Details of rotary drum granulator
Details of rotary drum granulator

How does a drum granulator work in fertilizer manufacturing

If you want to know whether drum granulator is suitable for you, it is a compulsory course to learn its working principle. You can understand it from two aspects:

  • Granulating method: Wet type granulation is the main operation way of rotating drum granulator. Through a certain amount of water or steam, the base fertilizer fully reacts in a chemical way after being wet in the drum body. Then under certain liquid conditions, the rotating motion of the drum  makes the material particles get squeezed together in granules.
  • Working process: On one hand, the main motor drives the belt and belt pulley, and transmits to the driving shaft through the reducer. Then the open gears on the driving shaft mesh with the large gear ring and work in the opposite direction. On the other hand, the material is added from the input port and passes through the cylinder. During this process, the special structure inside the cylinder helps to turn powder materials into granules. Finally the finished particles flow out through the discharge port. The continuous entry of materials and the continuous rotation of the granulator are secrets to realize mass production.
Fertilizer granules produced by drum pelletizer
Fertilizer granules produced by drum pelletizer

What convenience the rotary cylinder granulator can provide

Compared with other granulating machines, rotary cylinder granulator has many advantages. This is the reason why many fertilizer producers use it in their fertilizer making.

  • Long service life: Rorary drum granulator machine use high quality special rubber plate or acid-resistant stainless steel as lining. So the raw materials are not easy to stick to the cylinder and the machine has high performance in anti-corrosion and heat preservation.
  • Low power consumption: The granulating rate can reach 70% and there is a small amount of returned materials. The particle size of the returned materials are small, so it is convenient to re-granulate.
  • Low moisture: During the process of granulation,  injecting steam can increase the temperature of the material. Therefore the moisture content of the material will become low after the materials become granular fertilizer.  It helps to improve drying efficiency.
  • Wide applications: It is suitable for organic and compound fertilizer production; cold and hot granulation; high, medium and low concentration compound fertilizer; small, medium and large fertilizer production.

Rotary pelleting machine in organic and compound fertilizer production lines

You can use the rotary drum granulator machine alone or combine with other equipment to form a fertilizer production line. Batching machine, compost equipment, mixer, crusher, dryer, cooler and other auxiliary fertilizer equipment, various combinations, you can choose as you like. There are two rotary drum granulator production lines with high representatives.

100,000 tons/year compound fertilizer production line with rotary drum granulator machine

First, you must secure that your materials are suitable for the production line. This production line produces granular fertilizer from a variety of raw materials, such as urea, ammonium chloride, ammonium sulfate, monoammonium phosphate (MAP), diammonium phosphate (DAP), potassium chloride (MOP), potassium sulfate (SOP), etc. You can choose material according to your needs. The capacity of this production line reaches 100,000 tons/year, and the largest capacity of rotary drum granulator is 15-30t/h, so using one set drum granulator is enough. If you use the other granulator, there are two sets needed at least. In addition, rotating drum pellitizer has low power, which means low energy consumption. It is an optimal choice for mass compound fertilizer production.

20t/h rotary drum fertilizer granulation line
20t/h rotary drum fertilizer granulation line

30,000 tons/years organic fertilizer production line with drum granulating machine

During organic fertilizer making, you also can use a rotary pelleting machine, its raw material includes industrial residue, agricultural waste, animal manure, etc. Most materials all have high moisture content, which will make subsequent drying more laborious. But using a drum granulator, you can inject  steam to increase the temperature of the material. Then the moisture content becomes low and  subsequent drying becomes more convenient. Moreover, it has a special rubber and acid-resistant stainless steel lining, so the materials are not easy to stick to the wall. Reducing the loss of materials and lower fertilizer production cost. After processing, those organic waste will be turned into products with sales value.

Complete process of compound fertilizer making
Complete process of compound fertilizer making

 

Except the two production lines, we also provide other lines with different capacity, such as 20,000t/y or 50,000t/y, complete sets of equipment for organic or compound fertilizer production can procure from us. If you need rotary drum granulators or other fertilizer machines, you can contact us for details.

Factors influencing granulation effect in rotary drum granulation

Time and frequency of material rolling in the granulator

These two are the primary factors that determine the granulating rate and particle roundness. Because the material depends on the surface tension, the right amount of liquid, the extrusion force generated by the rolling materials to granulate. During the process, it takes small particles as the core and rolling to absorb other materials, finally bonding into balls. So within a certain period of time, the higher the rolling frequency, the higher the granulation rate, and the more rounded granule.

Too much material sticks on the inner wall of granulator

Too much material sticking to the wall will increase the friction between the material and the cylinder wall. Then the material in the machine will be lifted too high and thrown down from the top, so the particles are not round and too large.

There are two reasons for this situation: First, there are too many viscous materials. We can solve this situation by changing the process formula and reducing the amount of viscous materials. In addition, if the granulator has  non-smooth interior, the materials also have the possibility of  sticking. In this case, we can increase the smoothness of the granulator by changing the internal material.

Delivery of rotary drum pellet making machine
Delivery of rotary drum pellet making machine

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