When purchasing granulation equipment, users are used to asking about the fertilizer granulator machine price first. However, making a decision based solely on price often leads to problems. Besides price, there are at least three more crucial considerations when choosing between an organic fertilizer granulator machine and a flat die pelleting machine.

First, the characteristics of the raw materials. Organic fertilizer raw materials vary greatly in moisture content, ranging from livestock manure to straw and mushroom residue. Flat die pelleting machines use dry extrusion and are suitable for materials with a moisture content below 20% and high powderiness, producing dense and hard cylindrical pellets. If the moisture content is high or there are many fibers, the flat die is prone to clogging. A disc or agitator pelleting machine should be selected, which can handle 25%-35% wet materials. Choosing the wrong process, even if it’s cheap, cannot compensate for the losses caused by clogging.

Second, efficiency and energy consumption. Flat die pelleting machines have a production capacity of 0.5-3 tons per hour, do not require drying, and have lower overall energy consumption. Large-scale organic fertilizer granulator machines have a production capacity of 5-10 tons per hour, but require a supporting drying system, significantly increasing the overall energy consumption of the production line. Equipment specifications should be determined by working backward from the planned production volume to avoid mismatches.

Thirdly, there are long-term operating costs. Inexpensive carbon steel granulators experience wear and tear on the pressure rollers and dies within months, disrupting production. Alloy steel or high-chromium wear-resistant materials are initially 30%-50% more expensive, but their lifespan is significantly extended, resulting in a lower cost per ton. When using biological agents, ease of cleaning and corrosion resistance should also be considered.

In summary, flat die pelleting machines are suitable for low to medium production volumes, dry processes, and dry manure/straw raw materials; disc or agitator-type granulators are suitable for wet material processing and high production volumes. It is recommended to first clarify the raw material condition and production target, then compare materials and energy consumption, and finally consider the price. These three considerations beyond price are key to choosing the right equipment.