Drying, an indispensable process in the fertilizer production process, directly affects yield, quality and energy consumption. The rotary drum dryer can dry fertilizers with a moisture content of 70%-80% to 13%, which is an ideal machine for drying chemical fertilizers.
Which fertilizers need to be dried?
In the fertilizer production process, all kinds of chemical fertilizers need to be dried, including nitrogen fertilizer, phosphate fertilizer, potash fertilizer, compound (NPK) fertilizer, compost fertilizer, organic fertilizer, etc.
The following table will briefly introduce the composition and characteristics of these fertilizers:
| Types | Names | Composition (content) | Characteristics |
| Nitrogen fertilizer | Urea | N (46%) | Certain hygroscopicity, slow fertilizer effect |
| Ammonium sulfate | N (21%) | Weak hygroscopicity, soluble in water | |
| Ammonium chloride | N (25%) | ||
| Ammonium nitrate | N (35%) | Strong hygroscopicity, water solubility | |
| Phosphate fertilizer | Superphosphate | P205 (12-18%) | Caking, water solubility |
| Phosphorite powder | P205 (10-25%) | A bit slow fertilizer effect | |
| Potash fertilizer | Potassium chloride | K20 (50-60%) | Caking, soluble in water |
| Potassium sulfate | K20 (50-58%) | Hard to caking, soluble in water | |
| Compound (NPK) fertilizer | Ferrous sulfate | N (8%), P205 (45%) | Weak hygroscopicity, hard to caking |
| KDP | P205 (51%), K20 (34%) | ||
| Organic fertilizer | Livestock manure | Organic material(≥45%) | Slow fertilizer effect |
| Weeds, stems, straws, waste, etc. |