Influence of production process on production of compound fertilizer

Compound fertilizer has the advantages of high nutrient content, less auxiliary components and good physical properties. It plays an important role in balanced fertilization, improving fertilizer utilization rate and promoting high yield and stable yield of crops. The appearance of compound fertilizer is generally granular. Due to different production processes, the color is not the same. Its main raw materials are ammonium sulfate, ammonium nitrate, ammonium carbonate, ammonium chloride, urea, potassium sulfate, potassium chloride, ammonium phosphate, etc.

In the NPK fertilizer production, we should pay more attention to the quality of the finished product, the high quality of the fertilizer granules, and the economic benefits of the crops are also very beneficial. The quality of the finished products is closely related to the production process of the compound fertilizer.

Influence of production process on production of compound fertilizer
(1) The bonding concentration is appropriate and the dosage is uniform, so that the material is easily wetted and agglomerated into balls without reducing the strength after forming the ball. The solid-liquid ratio should be selected between 1:0.05 and 0.2.

(2) All raw materials (except urea) must be pulverized to a certain degree of fineness, and the fineness of each raw material is similar to reduce segregation. At the same time, the material must be placed in the "after the ball" and "long ball area", it is strictly prohibited to cut in the "tight area". Pay attention to the surface moisture of the ball and master the position of the adhesive spray.

(3) It is necessary to add powder blasting agent in time. When the granulation tray of the fertilizer granulator machine continuously rotated, the calcium, magnesium and phosphorus fertilizers are tightly adhered to the surface of the granules, and the free water is converted into crystallization water or evaporated, so that the granules are dry and loose, and the granules are piled after 8 hours. It becomes dry and hard and does not require drying to meet the standard. However, the amount of calcium magnesium phosphate added should not exceed 30% of the total calcium. Otherwise, the water-soluble phosphorus is seriously degraded.

(4) Controlling the granulation temperature, too high and too low are not conducive to ball formation, generally 60 ~ 70 ° C is appropriate.