May I ask what this production process is called?
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The last edit to this post was made by Nitrogen, phosphorus, potassium on 2009-10-27 at 14:18. The mixture of „ammonium phosphate, ammonium sulfate, potassium chloride, and fillers“ is fed into a drum granulator; „phosphatic fertilizers“ or „urea“ are dissolved in a tank to form a liquid, which is then sprayed onto the powdered raw materials through nozzles inside the drum granulator. Then it goes into the dryer, cooler, screening, and packaging process. What is this process called? Enter
2# sunhs1962 – I don’t seem to have heard of this name before.
Authoritative explanation: (Quoted below) Slurry-based granulation process. The principle of the slurry-based granulation process is that a portion of the basic fertilizer used for granulation is fed into the granulator in the form of a slurry. This slurry can be a urea solution or melt (with a urea concentration of over 95%), or it can be an eutectic compound formed from a urea solution and potassium chloride (or potassium sulfate). Within the granulator, this slurry, along with phosphorus sources such as calcium superphosphate and ammonium phosphate, as well as potassium salts (potassium chloride or potassium sulfate), is applied or combined to form pellets. Depending on the different types of granulators, this process can be further divided into the following granulation methods: drum granulation process ； Disk granulation process ； Spray granulation process ； Biaxial granulation process ； Fluidized bed granulation process. Due to its low melting point, urea does not crystallize or solidify easily, resulting in a low balling rate. Through research and development, slurries have been prepared by adjusting their composition or by adding special materials in order to improve the balling properties and achieve better granulation conditions. This is the technical key to this process.
In terms of composition, it is a compound fertilizer made from N, P, and K; a layer of urea or **phosphate fertilizer is sprayed on its surface for coating； It can be named the granulation process for melt-enveloped compound fertilizer
Although urea and nitramine phosphate fertilizers enter the material layer in a molten state. It is actually a type of granulation method. It’s the same as urine melting and urine granulation; it’s just that nitramine phosphate fertilizer is added.
This is probably similar to urea melting; it can also be considered a granulation method
There’s no need to pursue a particular name for it; names are merely given by humans, and it’s just a matter of whether the name sounds appealing or not. Essentially, it’s a compound fertilizer – several types of fertilizers are combined together using binders to create a new product. It’s quite simple; it involves physical changes, and machine operation can be used to replace manual labor. The key lies in the equipment used, and this process is so simple that even a farmer can understand it.
Personal opinion: Generally speaking, it is called spray drum granulation method–when urea is used, it is urea-based spray drum granulation; when **phosphate fertilizer** is used, it is phosphate fertilizer spray drum granulation.
This is a type of granulation method; it also falls under the category of slurry-based granulation, and can be referred to as spray granulation. This granulation method is also quite widely used.