Fertilizer Machine Manufacturer Introduces How to Produce Compound Fertilizer Granules

The common granulation processes of compound fertilizer include tower granulation, rotary drum granulation (NPK fertilizer production line), spray granulation and so on. As fertilizer machine manufacturer, let’s introduce these production processes from the perspective of fertilizer production.


  1. High tower granulation process is mainly used for the production of high concentration nitro compound fertilizer. It can directly use concentrated ammonium nitrate solution, eliminating the links of spraying granulation, and granular compound fertilizer eliminates the process of crushing operation. At the same time, the compound fertilizer granules produced by the high tower granulation process are very uniform, the qualified rate is very high, the quality is good, easy to dissolve, and the caking phenomenon will not occur.


  1. Rotary drum granulator has little restriction on compound fertilizer formulation, high production yield, low investment and construction speed. It is favored by investors of small and medium-sized compound fertilizer plants and widely used in compound fertilizer production. The complete drum granulation process is a NPK compound fertilizer production line, which includes fertilizer granulator, automatic batching system, mixer, crusher, drum dryer, drum cooler, coating machine, packaging machine and other equipment.

NPK compound fertilizer production line


  1. The spray granulation process adopts the slurry method. The slurry is sprayed into the equipment by heating and pumping, so that the moisture in the slurry is vaporized and separated, and the retained solid forms a granular compound fertilizer. This kind of process is widely used in large-scale compound fertilizer production. Its advantages are that it can be used to produce NPK compound fertilizer, and can also be used to produce ammonium phosphate compound fertilizer. At the same time, it has less energy consumption, large production scale and low production cost. The quality and strength of the products are very good.


Tianci fertilizer machine manufacturer with many years of experience. The drum granulation NPK compound fertilizer production line is our main equipment product. Among the equipment sold, it is highly praised by many fertilizer factories internationally.

Production process of potassium chloride by disc granulator machine

In the production of potassium chloride granular fertilizer, fertilizer granulator can be used to granulate powder. The particles produced by disc granulator are spherical and have good strength, which can be widely used in agricultural production.


Disc Pan Granulator

In the granulation process of disc pan granulator, it is necessary to add a binder to make the granules shape. Binder can be compounded by common inorganic minerals in a certain proportion. Binder has synergistic effect when potassium chloride is pelleted. The effect of pelletizing rate and particle strength is good when the binder is used for pelletizing. Potassium chloride was granulated by disc pan granulator machine, and the granules were spherical.


NPK Fertilizer Production Line

NPK fertilizer production line deals with potassium chloride fertilizer. First, all raw materials are mixed by the batching system, and the material is crushed by chain mill to the appropriate size. The disc granulator makes the powder into granules. After drying and cooling, the granules of potassium chloride are coated with protective film by the fertilizer coating machine to complete the granular processing of potassium chloride.

Disc Granulator NPK Fertilizer Production Line


When applying potassium chloride, attention should be paid to the appropriate period of potassium application. Generally, the application period of potassium fertilizer should be early or not late, and should be used as base fertilizer and early recovery period. When the application amount of potassium fertilizer is less, it can be used as base fertilizer once, and when the application amount of potassium fertilizer is more or the soil texture is lighter, the application effect is better divided into base fertilizer and topdressing fertilizer. Soil nutrients and fertilization status should also be taken into account in determining the suitable application period of potassium fertilizer. In severe potassium deficiency soils, all potassium fertilizers should be used as base fertilizers in medium soil potassium supply, and suitable organic fertilizers should be applied as base fertilizers, combined with topdressing.


Note the method of application of potassium chloride. The concentrated application of potassium fertilizer is beneficial to improve its utilization rate and obtain better results. However, it is not advisable to have direct contact with seeds or seedlings. For general crops, a combination of soil fertilization and foliar fertilization can be used.

Detailed analysis of process flow of NPK fertilizer production line

The NPK compound fertilizer production line is a comprehensive and scientific compound fertilizer production flow line, which plays an extremely important role for the user’s own production demand, cost control and economic benefit improvement. Generally speaking, the NPK fertilizer production line mainly includes raw material distribution, mixing and agitation, material pulverization, granulation and discharge, primary classification, material drying, secondary grading, finished product coating and packing etc., through effective process control and material selection, Comprehensively grasping the required material targets, the production and use of compound fertilizers have achieved the desired results.

NPK fertilizer production line

Especially with the grasp, refinement and classification of the concept of ecological planting, green planting, resource utilization and recycling, the demand and demand level of the NPK compound fertilizer production line have been maximized. Moreover, as the technology continues to mature and continue to advance, the production processes of each branch are refined and subdivided. For example, for raw material ingredients, the industry generally adopts the ratio of urea, ammonium chloride, ammonium phosphate and ammonium nitrate, and is equipped according to a certain proportion, and also needs to have the conditions of the local soil itself. For example, there is also a great demand for material granulation. Before the material is fed into the fertilizer granulator machine for granulation, the material should be uniformly stirred, pulverized uniformly, and the overall shape is good, and this step is in the process of the NPK fertilizer production. It is a must and the most important part.


As a leading fertilizer machine manufacturer in China, we can produce different kinds of fertilizer granulator machine for the fertilizer manufacturing process, welcome to inquiry.

For the optimization, adjustment and upgrading of the NPK compound fertilizer production line, as well as the control and scientific management of the entire assembly line operation; it has played a positive role in saving manpower, reducing costs, long-term production and profit improvement.


Detailed explanation of the working principle of compound fertilizer equipment

Zhengzhou Tianci Machinery specializes in the production of compound fertilizer equipment. The following is a detailed introduction to the working process of the NPK fertilizer production line and the mechanical equipment used. Hope to help you.

fertilizer machine

The following is detailed description:
1. Selection of raw materials: According to the formula operation, add additives, trace elements, N, P, K, etc. to the mixer machine for mixing. The advantage of alternate mixing with two compound fertilizer equipment is: continuous production, improved efficiency, greatly Reduce the labor intensity of people.

2. Mixing raw materials and ingredients: mixing and pulverizing with a horizontal pulverizer unique to the compounding equipment, the pulverizer can thoroughly pulverize the added bulk materials, so that the raw materials are completely mixed.

3. Granulation: Granulation is a very important step in the NPK fertilizer production line. There are also many kinds of fertilizer granulator machine. The specific classifications are: drum granulator, disc granulator, extrusion granulator, and these three granulators are the most widely used in the NPK fertilizer production.

4. Drying the granules to increase the hardness: The granulated compound fertilizer has formed granules, but since there is still moisture and the hardness does not meet the requirements, it must be dried.

5. Cooling granules: The dried granules are transferred to a cooling machine for cooling to a normal temperature, which further increases the strength of the composite fertilizer granules and further reduces the moisture.

6. Screening: After cooling, the composite fertilizer particles will have powdery particles. The fine powder and large particles will be completely sieved out by the sieving machine. The fine powder will be directly returned to the mixer and mixed with the raw materials through the return belt conveyor, and then participate in the granulation process again. After the large particles are pulverized, the fine powder is returned to the mixer through the same return belt conveyor.

7. Packing: Packing with packaging machine. After the worker puts on the bag and triggers the switch, the packaging machine automatically completes the bag, blanks and bags. At the same time, the feeding device is automatically and automatically fed. When the weighing weight of the weighing system reaches the set value, the feeding is automatically ended, and the operator puts on a new packaging bag for the next packaging process.

Zhengzhou Tianci Machinery is one of leading fertilizer machine manufacturers in China, provides you with relevant introduction and working principle of compound fertilizer equipment. We hope to help you. The company welcomes new and old customers to visit, visit and negotiate.

How to improve the pelletizing rate of NPK fertilizer production

NPK compound fertilizer is characterized by simple composition, high nutrient content, low dosage, quick fertilizer effect, convenient application, transportation and storage, and rapid improvement of yield and quality. In order to produce large quantities of high-quality compound fertilizer, the first step is to produce good fertilizer granules.


The main factors influencing NPK fertilizer production line are as follows:

  • Production equipment;
  • Process technology;
  • Physical and chemical properties of raw materials;
  • Production formula and added conditioner;
  • Air temperature and air volume at the outlet of the dryer;
  • Temperature and liquid phase quantity of granulating materials;
  • Material flow;
  • Material return ratio;
  • Quality of operators;
  • Climatic conditions.

Only by integrating the above factors into making fertilizer granules, can we produce NPK fertilizer with high yield and good quality, one of which is indispensable.

  1. Improving the performance of NPK fertilizer production equipment is the basis

Choose qualified production equipment, choose well-equipped, complete test means, reliable product quality manufacturers, under the guidance of experienced personnel to buy, late equipment management and maintenance personnel to have a certain professional level. Zhengzhou Huaqiang Co.Ltd are leading agricultural fertilizer machine manufacturers in China. We has strong technical strength in fertilizer machines. All of our products comply with international quality standards and greatly appreciated in a variety of different markets throught the world.


  1. Choosing ammonium phosphate with good viscosity as raw material is the premise

The pelletization of NPK fertilizer mainly depends on the viscosity of ammonium phosphate and conditioner, and the poor viscosity of ammonium phosphate directly affects the pelletization rate of compound fertilizer. Therefore, when purchasing ammonium phosphate, we should consider not only nutrient content and price, but also its viscosity. From the actual production experience, the viscosity of diammonium phosphate is better than that of monoammonium phosphate.


  1. Ensuring the fineness of raw materials and feedbacks is essential

The finer the powder of the raw material, the better the viscosity of the material, the more important it is to improve the efficiency of the crusher

Chain crusher to help make the big granules into the fine powder and get back to fertilizer granulator machine. It is simple and compact in structure, cover small area, easy maintenance such characters, crushing effect is good, smooth operation, easy to clean.


  1. Material mixing is an important measure to improve the NPK fertilizer production line efficiency

The material is mixed evenly, on the one hand, the mixer mixes the fresh material evenly, on the other hand, the mixer combines the returned material and the fresh material evenly. Because the fine powder in the returned material is mostly potassium and nitrogen with poor viscosity, it is the material that is least likely to form into a ball, while the fresh material has better viscosity and is easy to form into a large ball in production. Mix the two thoroughly to prevent the formation of large balls and too much powder.


  1. Suitable moisture and pelletizing temperature are the key

Only when the temperature and water content of granulating materials are adjusted to the optimal point can the granulation area be ensured to be normal.

The disc fertilizer granulator is suitable for the production with small yield, and the rotary drum granulator is suitable for the mass production of NPK fertilizer. Addition of moisture during granulation requires certain experience of operators.


  1. Suitable air volume and stable furnace temperature are the preconditions

The size of the air volume directly affects the drying effect, the air volume in the dryer, the drying effect is good. If the air volume is too large, it is easy to extract the powder in the simplified body, and the wind speed should be less than 2m/s.Best cooling head end temperature difference is about 100℃, the import and export temperature cannot frequent adjustment. When urea is used as nitrogen source, the temperature should be determined according to the amount of urea. The more urea is used, the lower the drying operation temperature will be.