In fact, if you use common NPK materials or certain mineral powders, it won’t cause more wear and tear on the rollers. Typically, under standard conditions, double roller fertilizer granulator can last up to 1500 tons of NPK granular fertilizer production. For example, urea, ammonium sulfate, ammonium chloride, calcium carbonate, limestone, zeolite, bentonite and other similar powder or lumps. Moreover, when extruding NPK fertilizer powder directly for granulation, you needn’t to add other auxiliary materials. However, if you make compound fertilizer granules from finer mineral powder, the extrusion pressure between the two rollers alone is not enough forming. Also, you can add 20% water appropriately for better granulation effect.

In general, some compound fertilizer materials are slightly acidic. When the rollers press these materials, the temperature will rise up. Therefore, through certain physical and chemical reactions, these raw materials can corrode the roll coating and ball socket shape over a long period of time. Honestly, this extruder pelletizer can produce approximately 800 tons of fertilizer granules from corrosive substance. For instance, you can use ammonium chloride, potassium nitrate, calcium chloride, calcium nitrate, manganous sulfate, monoammonium phosphate, etc. to make fertilizer pellets. What’s more, regular cleaning and maintenance can extend the service life of the roll dies.

Indeed, organic fertilizer granulation raw materials include chicken manure, pig manure, kitchen waste, sawdust, bean dregs, biogas residues, mushroom residues and so on. At the beginning, you should handle these materials by compost machines for fermentation and decomposition. After organic fertilizer composting, these materials contain 30-35% moisture content. And you’d better age to reduce water for a few days before granulation. Because organic compost has high moisture and strong stickiness, it is easy to clog and damage the roll molds. As a result, double roller compaction pelletizer has a maximum lifespan of processing 500 tons of organic waste.

Proper maintenance can significantly extend the service life of roller granulating machine. Firstly, regular cleaning is crucial. And you remove residues, especially when processing corrosive materials. Secondly, proper lubrication reduces friction and prevents the machine parts from wearing out prematurely. In addition, operators should avoid overloading the granulator, as excessive load can accelerate wear. Lastly, you should frequently inspect the roller skins for wear and tear. Then, you can replace worn-out parts promptly to prevent further damage.

What is the key part for operational efficiency of a double roller extrusion granulator? Besides, what is the important section of an roller extruder granulator or roller compaction technology. Of course, they are the roller sheets. These sheets are the primary contact points where powders are pressed into uniform granules. Therefore, the material chosen for the roller sheets must exhibit outstanding strength and durability to withstand the pressure and friction of the process.

For this reason, the roller sheets are made from 20GrMoTi, a high-performance alloy that provides exceptional wear resistance and mechanical properties suitable for the intense requirements of the dry granulation process. The composition of 20GrMoTi includes chromium, molybdenum, and titanium, which contribute to the alloy’s hardness and stability, ensuring that the roller sheets maintain their shape and functionality over an extended period, even under continuous operation.

The use of 20GrMoTi in the construction of roller sheets enables the granulation machinery to operate at peak efficiency, producing high-quality granules with consistent size and density. It also reduces the frequency of maintenance and replacement, thereby enhancing the overall productivity of the granulation process.

By incorporating 20GrMoTi into the design of the roller sheets, we ensure that our extrusion granulators are equipped to meet the rigorous demands of modern industrial applications.

The double roller extrusion granulator, also known as a dry granulation press or roller compactor, is a pivotal piece of equipment in the granulation process, which transforms fine powders into densified and compacted granules. The machine’s structural material is of paramount importance, as it needs to endure continuous operational stress and strain. For this reason, the main frame and components of the extrusion granulator are constructed from boiler steel, specifically the Q235 grade.

This material is renowned for its impressive strength and resilience, making it an excellent choice for heavy-duty machinery. Q235 boiler steel is characterized by its high tensile strength and yield point, ensuring that the machinery can withstand the substantial pressure exerted during the compaction process. Moreover, its resistance to deformation and cracking under stress guarantees a long service life for the granulator, ultimately leading to reduced maintenance requirements and operational downtime.

Thus, the utilization of Q235 boiler steel in the construction of the extrusion granulator not only ensures the robustness and longevity of the machinery but also underpinning the reliability and consistency of the granulation process.