Technology of Dry Granulation Equipment

Mechanism: under the strong extrusion force, the solid powder in the closed space is compressed, and plastic deformation occurs, which makes the solid particles occlude, destroy and rearrange each other, and compact to form the particles with the required shape. The specific gravity of the particles is close to the true specific gravity of the material.

The flake materials are crushed, pelleted and sieved to obtain the granular products meeting the requirements of particle size; while the block materials are determined by the concave shape of the dry fertilizer pelleting machine, which can be directly packaged or stored after removing a small amount of flash and entrained powder after screening. The extrusion pressure between the two rollers can be adjusted by the pressure of the hydraulic cylinder according to the needs of granulation operation.

Main features:
(1) the plastic deformation of solid particles under the action of extrusion force forms the rearrangement and combination of particles;
(2) there is no need to add binder;
(3) no drying is needed in the subsequent process.

Main equipment:
The main types of operation equipment are: roller type extrusion granulator, flat die granulator.

High performance parts of dry granulator produced by ShunXin fertilizer machine supplier

  • Material of pressing wheel: it is made of special materials and is quenched and tempered at high temperature, so that the pressure wheel has good plasticity, toughness and strength, and improves the comprehensive mechanical properties;
  • Surface of pressing wheel: the surface of pressing wheel should produce the maximum friction force with the material, so as to produce the maximum adhesion force between the materials, which is conducive to improving the rolling effect and finally obtaining the ideal molding material. Therefore, different surface of the pressing wheel should be selected according to different materials;
  • Surface hardness treatment of pressing wheel: the most advanced surface hard ammoniation treatment technology in the world is adopted to ensure that the surface hardness is more than hvi200, and the depth of nitriding layer is 0.2mm, so that the pressure wheel has strong wear resistance, improve the anti fatigue strength, and make it have good corrosion resistance. Under normal use, the service life of the roller is guaranteed to be 5-12 years;
  • Structure of pressure wheel: unique and reasonable internal structure can make the surface of pressure wheel cool well
  • The material of pressure wheel is made of stainless steel 304-2b.

Notes on Cow Dung Granular Fertilizer Making

In order to solve a series of problems caused by a large amount of cow dung, it is better to compost and pelletize cow manure to make it become organic fertilizer, so as to create more benefits for economy, society and environment.

At present, the most common and valuable processing method is to convert cow dung into marketable organic fertilizer. Cow dung is a waste produced by cattle. It has high levels of organic matter and rich nutrients, including nitrogen, phosphorus and potassium, as well as many other essential nutrients. According to the data, cow dung contains 12.9%DM and excretes 0.15kg N, 0.04kg P and 0.08kg K per day. In addition, cow dung also contains high levels of ammonia, which can almost kill the growth of pathogens. Once the raw cow manure is composted by a professional composting turner, it can provide many benefits for plants and organic farms, which makes cow dung a very popular and useful raw material for organic fertilizer production.

As one of the most important sources for the preparation of effective biological / organic fertilizers, cow manure residues should be collected first. Heavy cow dung should be mixed with organic matter such as dead leaves, sawdust, wood ash, hay and straw. The mixed cow dung is then composted and fermented better through composting. After full composting, the cow dung is transferred to the crusher for crushing to ensure the smooth granulation process. Remember to choose the right organic fertilizer granulator according to the manure composting and production scale.

Generally, in order to facilitate packaging and storage, rotary dryer will be used to evenly dry the particles and eventually produce a uniform and high-quality final product. Finally, ShunXin Fertilizer Machinery also provide automatic packaging machines to achieve efficient, automatic and convenient organic fertilizer packaging and bagging solutions.

Working Principle and Advantages of Disk Fertilizer Granulator

  • How does the Disc Granulating Equipment Work?

The material and binder can be thoroughly mixed before entering the pelletizer. This produces a uniform mixture and uniformly disperses the binder.

Most of the moisture required to form the fertilizer balls can be added during the mixing process (in the form of adhesives), so it does not need to be done in the granulator, which can be a long process. Therefore, in many cases, the use of the mixer prior to the pan pelletizer usually increases productivity.

The pre conditioned material is densified by the motion exerted by the mixer. Because this densification is achieved by mixing, less binder is required to produce the same densification, thereby reducing the cost of the binder.

After conditioning, granulation will continue. For processes that do not use preprocessing steps, this is where the process begins. Here, the material is fed to the pelletizer at a continuous rate, and the binder is continuously added to it. Because of the adhesive, the fine powder of the material is sticky. When the granulating pan rotating, it will pick up more fine powder when it drops by its own weight. Its growth mode is similar to that of snowball.

Once the granules have reached the required size, they leave the pelletizer and are transported to the drying equipment by belt conveying machine.


  • Advantages of disc granulating machine:

Its structure is simple and easy to operate and maintain. In particular, since the fertilizer balls in the granulating disc can be directly seen, the replacement and adjustment are convenient and quick.

Low price, small installation area. At the same output, the price of the disc granulator in ShunXin Machinery is two-thirds, and the installation area required is about half of that of other kinds of fertilizer granulators.

It has classification effect. When the required granularity is reached, it will automatically eject from the edge of the disc. The particle size of the product is relatively uniform.

The product has high particle strength and good quality. Due to the gradual increase of pellets in rolling and falling process, it is not easy to be crushed and has smooth surface.