If you are looking for a reliable and efficient granulation equipment to produce high-quality NPK fertilizer, you should consider the rotary drum granulator. This machine is specially designed for large-scale fertilizer production, and it can produce granular NPK fertilizer with high granulation rate, uniform size, and good appearance.
The rotary drum granulator is composed of a rotating cylinder, a driving device, a support device, and a sealing device. The cylinder is coated with a special rubber sheet or acid-resistant stainless steel lining plate to prevent the raw materials from sticking to the drum wall. The cylinder is inclined slightly to facilitate the discharge of the granules.
The working principle of the rotary drum granulator is as follows:
1. The raw materials are mixed evenly according to the NPK fertilizer formula, and then they are sent to the feeding port of the granulator by a conveyor belt or a bucket elevator.
2. The raw materials enter the rotating drum, and they are lifted up by the internal flights along the drum wall. As the drum rotates, the raw materials fall down under the action of gravity and centrifugal force, forming small nuclei.
3. The small nuclei continue to grow as they roll along the drum wall, and they are sprayed with water or steam to increase the adhesion and moisture content of the materials. The water or steam also helps to adjust the temperature and pressure inside the drum, which are important factors for granulation.
4. The granules reach a certain size and shape, and they are discharged from the outlet of the drum. The granules are then dried, cooled, screened, and coated to obtain the final NPK fertilizer products.
The advantages of the rotary drum granulator are:
– It can produce various types of NPK fertilizer with different concentrations and ratios, such as 15-15-15, 20-20-20, 10-20-10, etc.
– It can handle large capacity of raw materials, ranging from 1 ton per hour to 30 tons per hour.
– It has a simple structure, easy operation, low maintenance cost, and long service life.
– It can produce spherical granules with good appearance and high strength, which are suitable for packing and transportation.
The rotary drum granulator is an ideal choice for large-scale NPK fertilizer production. If you are interested in this machine, please contact us for more details. We can provide you with customized solutions according to your specific needs and budget.