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.

Common problems of NPK compound fertilizer production

NPK compound fertilizer is synthesized from chemical raw materials needed by various plants. NPK fertilizer has played a significant role in increasing production and income of agricultural production. So what are the common problems in the NPK fertilizer production process and what needs to be known about the equipment for the production of NPK fertilizer?


  1. Specialized NPK fertilizer production equipment is naturally used for fertilizer production, but due to the nature of compound fertilizer itself, fertilizer equipment is easy to be corroded, and some frequently used equipment has been seriously corroded in less than a year. Normal loss is inevitable, but necessary equipment maintenance can prolong the service life of fertilizer processing equipment.


  1. When crushing raw materials, we should try our best to ensure that there are no large hard blocks in the raw materials. In the compound fertilizer raw materials, if there are stones or even iron blocks, it will cause serious damage to the high-speed rotating mill rotor. Only by ensuring that the raw materials are clean and free of impurities can the equipment of fertilizer production process not be affected.


  1. Mechanical equipment relies on motor and reducer to obtain power source. Periodically adding lubricating oil to fertilizer granulator machinecan better ensure their operation. There are many types of lubricating oil, so we should choose suitable grease according to the principle of climate and mechanical transmission. For example, in cold areas and hot and humid environment, it is necessary to select the appropriate lubricant to ensure better operation of the equipment. In addition, when filling oil, control the amount of oil, so as not to affect the effect too little, or too much waste.


  1. Different equipments have different productivity. We should use the equipments reasonably according to their productivity. For example, in the compounding stage of fertilizer manufacturing process, forklift trucks should be allowed to drop materials slowly when feeding into silos, so as not to damage the equipment. When mixing, the raw materials should not be too full, and materials should be added after the start of the mixer, in order to avoid equipment damage due to excessive stirring resistance.

NPK fertilizer production process

In short, there are many details about the production of NPK fertilizer. Only by maintaining the fertilizer production equipment can they work better and bring us more benefits.


The working principle of the disc granulator in the fertilizer production line

The disc granulator machine is mainly used in the NPK fertilizer production line and organic fertilizer production line to produce various granular products; it’s also used in pharmaceutical products, fertilizers, feeds, etc. Adopting the overall arc structure, the granulation rate can reach above 93%. The granulation tray has three discharge ports, which facilitates intermittent production operations, greatly reduces labor intensity and improves labor efficiency.

disc granulator machine

Disc fertilizer granulator machine working principle:
The raw meal powder is uniformly wetted by the atomized water in the mixer to form a spherical core having a uniform particle size, and then fed into a ball plate for ball formation. The moisture of the ball should be controlled at 12-14%. Most of the water should be added in the twin-shaft mixer. Only a small amount of supplementary water is added to the ball plate, and the amount of water added is controlled to be about 0 to 3%. The dry powder granulation is directly added to the ball-forming plate, and the proper amount of water is sprayed. The raw material nucleus enters the spherical disk and is subjected to centrifugal force, friction and gravity in the disk, and moves along the parabola. Due to the cohesiveness and plasticity of the material, the cores are bonded to each other and gradually grow up during the movement. When the inclination angle of the ball disc, the height of the disc edge, the rotation speed and the moisture are constant, the balls of different particle sizes roll downward from the edge of the disc at different disengagement angles due to different gravity. During the continuous rolling process, the ball continuously discharges the water in the ball out of the surface. Due to the cohesiveness of the material and the natural volatilization of the surface liquid film, the ball has certain strength, and then the disk is rotated with the tilting of the disk. The sides are discharged out of the pan.

Disc granulator performance advantages:
1. The raw materials are suitable for a wide range of applications. They can be used for granulation of various raw materials such as compound fertilizer, medicine, chemical feed, coal, metallurgy, etc., and can produce various concentrations and various types (including organic fertilizer, inorganic fertilizer, and magnetic fertilizer etc.) of compound fertilizer.
2. The disc granulator is light in weight, low in height, and flexible in process;
3. The machine has simple structure, convenient adjustment and superior performance.
4. The use of unique unpowered combination scraper integration reduces auxiliary power consumption.

5, high ball formation rate, large rounded particle strength, intuitive operation, easy maintenance and so on.

Fertilizer granulator machine is the core equipment for fertilizer manufacturing process. As one of leading fertilizer machine manufacturers in China, in addition to the disc granulator, we also produce other types of fertilizer granulator machines, and other equipment such as compost turning machines, mixer machine, crusher machine, etc.

Other article for your reference:Chicken manure organic fertilizer production line

NPK fertilizer manufacturing process

In this article,brief introduction of complete equipment and process of compound fertilizer production line of Zhengzhou Huaqiang Heavy Industry Technology Co.Ltd.The npk fertilizer manufacturing process production of compound fertilizer is the general process of compound fertilizer production,which is of great significance for users to incest and fully understand the production of compound fertilizer.

npk fertilizer manufacturing process
The fertilizer manufacturing process of npk,compound fertilizer is roughly as follows:raw material proportioning,mixing,and stirring,agglomeration and crushing,material granulation,primary screening,particle drying,particle cooling,secondary grading of particles,coating of finished particles,quantitative packaging of finished particles,etc.
The following is a detailed introduction to each link of the production process of npk, compound fertilizer and in different producing parts it is equipped with different type fertilizer equipment:
The production process of npk,compound fertilizer includes raw material promoting,mixing,crushing and agglomeration,granulation,primary screening,particle,drying,particle cooling,secondary screening,particle coating of finished products and quantitative packaging of finished products.
NPK fertilizer manufacturing process

1.Raw materia ingredients:generally the raw materials can be the urea,ammonium nitrate,ammonium chloride,ammonium sulfate,potassium chloride and other raw materials can be selected and prepared in a certain proportion.
2.Mixing parts:Minx the prepared raw materials evenly to improve the overall uniform fertilizer efficiency content of the fertilizer particles,and use the horizontal mixer or disc mixer to mix the raw materials.
3.Agglomerate crushing:the raw materials with uniform mixture are crushed to facilitate the subsequent granulation processing,mainly using chain crusher,etc.
4.Material granulation:evenly stirred and crushed materials are sent to the granulator by belt conveyor for fertilizer granulator machine(drum granulator,disc granulator and roller press granulator can be used),which is an essential and most important step in the production process of compound fertilizer.
5.Primary screening:preliminary screening of semi-finished particles.Unqualified particles are returned to the mixing and mining link for reprocessing.Generally,roller screener is used to sceeen the granulator.
6.Particle drying:the particles made by the granulator and screned by the first stage are sent to the dryer to dry the moisture contained in the particles,so as to increase the particle strength and facilitate the storage.Generally,the rotary dryer is used in the fertilizer manufacturing process.Sometimes,the series of fertilizer dryer is also equipped in the organic fertilizer production line.
7.Particle cooling:the dried fertilizer particles are easy to agglomerate due to their high temperature.After cooling,they are easy yo be stored and transported in bags and stored by a cooler.
8.Secondary grading of particles:The cooled particles are graded,the unqualified particles are crushed and regranulated,and the qualified products are screened out,which can be screened by the secondary drum screener machine.
9.Finsihed paticle coating:coating the qualified products to increase the brightness and roundness of the particles,so as to make the appearance more beautiful.Generally,the coating machine is used for coating.
10.Quantitative packaging of finished particles:the coated particles,which is to easy,the finished particles are sent to the silo by the belt conveyor for temporary srotage,and then connected to the electronic quantitative packaging scale,sewing machine and other automatic quantitative packaging and sealing bags,placed in the ventilation place for storage,so as to realize full automation.

Then production process of compound fertilizer is simple,the production process of npk, compound fertilizer production line is small,the floor area is small,the operation is simple,and the technical requirements are not high.

Economic Benefit of Producing Slow-acting NPK Complex Fertilizer

Because of the low utilization rate of chemical fertilizer, people try to make a slow-release and high-utilization fertilizer to meet the demand of nitrogen in different growth stages of crops, reduce the loss of nitrogen leaching and volatilization, reduce the fixation of phosphorus and potassium fertilizers in the soil, so that the fertilizer can supply nutrients according to the requirement of crop fertilizer. The available CaO, MgO, SiO 2 and various trace elements in fertilizers are also good soil amendments. The coated NPK fertilizer manufacturing process can produce suitable fertilizer products.


Slow release coated fertilizer manufacturing process

NPK Fertilizer Production Process

According to the sustainable development of agriculture and the demand of improving fertilizer utilization rate, Zhengzhou Tianci Fertilizer Machine Manufacturer has developed a slow-acting, high-utility coated complex fertilizer manufacturing process. The fertilizer manufacturing process is based on the instant granular fertilizer as the core, one or more slow-release plant nutrients as the coating, inorganic acid complex, slow solvent and other binders to wrap water-soluble fertilizer, forming a complex fertilizer with both quick-acting and slow-acting components. We provide fertilizer manufacturing process including fertilizer granulator machine, pulverizer, rotary dryers, coolers, drum screening machines, coating machines, packing machines and other equipment. The whole set of fertilizer production equipment can complete the processing and coating of the particles of the complex fertilizer, so that the fertilizer has high utilization rate in the soil.


Benefits of NPK Fertilizer Production Process

In the process of fertilizer production, the structure and composition of cladding layer can be adjusted to control the release rate of nutrients so as to reduce leaching loss and improve the utilization rate of fertilizers. This fertilizer product not only has the characteristics of slowly releasing nutrients, but also can meet the needs of nutrients for the whole growth period of crops and the ratio of nutrient utilization rate by one basal application. Conventional quick-acting fertilizer increased by 10-30 percentage points, the utilization rate of nitrogen fertilizer could reach 50%-70%, and the amount of fertilizer used could be reduced by 10%-40%. Due to the remarkable economic and social benefits of slow-acting and high-utilization wrapped complex fertilizer, and in line with the direction of fertilizer development, it is worth vigorously promoting.

Potassium chloride production process 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.

Pan Granulator NPK Fertilizer Production Line

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.


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.

NPK fertilizer production line

The main equipment that NPK, compound fertilizer production line contains:
1.Automatic batching machine
2.Belt conveyor
5.Rotary drum granulator
8.Screening machine
9.Coating machine
10.Automatic packing machine
NPK fertilizer production line
1.This equipment has the less investment, good results and the great economic benefits.
2.Complete sets of equipment are compact, scientific and reasonable, and advanced in technology.
3.It can save energy , and has no waste discharge, stable operation, reliable operation and convenient maintenance.
4.The material has wide adaptability and is suitable for granulation of all kinds of raw materials such as compound fertilizer, medicine, chemical industry, feed and so on, and the product has high granulation rate.
It can produce all kinds of concentration, multiple types (including organic fertilizer, inorganic fertilizer, magnetized fertilizer, etc.) compound fertilizer. In particular, it can produce rare-earth, potash and ammonium bicarbonate series compound fertilizer granulating.

What is NPK Compound Fertilizer?

With the development of modern commercial crops, the quantity demands of organic fertilizer and npk compound fertilizer is increasing, especially the needs of nutrients elements from npk compound fertilizer is essential. however, what is npk compound fertilizer and what type fertilizer machines are used in the npk fertilizer  manufacturing process?

 In a fertilizer production process, which containing N, P, K and other main nutrients in two or more ingredients of fertilizer at the same time, it is known as compound fertilizer.Those who contain two kinds of main nutrition elements are called binary compound fertilizer, those who contain three kinds of main nutrition elements are called ternary compound fertilizer, those who contain three kinds of above nutrition elements are called multivariate compound fertilizer.

NPK fertilizermanufacturing process
The Nutrient Content Of Compound Fertilizer:

  Compound fertilizers are traditionally represented by the corresponding percentage of N-P2O5-K2O. If a compound fertilizer contains n10%, P2O5 20 % and K2O 10 %, the compound fertilizer is expressed as 10-20-10.

Some were also marked with S after the number of K2O content, such as 12-24-12 (S), which means that it contained K2SO4.
 In ternary compound fertilizer, each nutrient should be at least 4% and the total content should be within 25% ~ 60%. Low concentration compound fertilizer with total content of 25% ~ 30%, medium concentration compound fertilizer with total content of 30% ~ 40%, and high concentration compound fertilizer with total content of more than 40%.
The Fertilizer Manufacturing Process of NPK Compound Fertilizer:
 The compound fertilizer is manufactured by the professional npk compound fertilizer production line.
 The main equipment that NPK Fertilizer Production Line contains: Automatic batching machine, Belt conveyor, Mixer,Crusher, Rotary drum granulator, Dryer, Cooler, Screening machine, Coating machine, Automatic packing machine and these fertilizer equipment are also used in the line. it can produce  high, medium, low concentration compound fertilizer according to the different percentage of single fertilizer element. Material has wide adaptability.

 All production line has low cost,  high efficiency, energy-saving, and it is also suitable for the production of medicine, chemical industry, feed and so on. We have provided many sucessful cases for our clients. such as, 80,000 tons compound fertilizer combination production line,  1000 tons to 200,000 tons compound fertilizer production line and organic fertilizer produciton line annual output in home and abroad.

How to Solve Dust Pollution in Organic Fertilizer and NPK Fertilizer Production

Because of the characteristics of materials, a lot of dust will be produced in fertilizer production, which will pollute the environment. In order to avoid this problem, dust removal devices should be set up in the design of organic fertilizer manufacturing process and NPK fertilizer production project to solve the problem of dust emission.


Dust Problem in Organic Fertilizer Production Line

In the organic fertilizer production line, when the moisture content of raw materials is low, they are often crushed and uneven solids. When the raw materials are transported to the equipment, if they are transported in the open air, there is no effective sealing measures, so the dust concentration in the air of the organic fertilizer manufacturing site will be too high. In addition, most small and medium-sized enterprises lack effective treatment means when discharging exhaust gas, which leads to the emission of exhaust gas not up to the standard and dust pollution.


Dust Problem in NPK Fertilizer Production Process

Take NPK fertilizer production project as an example, because the raw material of NPK fertilizer is brittle, it is easy to form small particle dust. When the dust is disturbed by airflow, it is easy to fly. Because of the low water content of NPK fertilizer, the dust is easy to absorb and adhere to the equipment. Therefore, when grading by using the screening device, the dust can easily block the sieve holes of the screen, thereby affecting the grading effect and even damaging the screen. As a result, the screen must be frequently replaced, on the one hand, the production cost is increased, on the one hand, to improve production costs, on the other hand to reduce production efficiency.


To solve the problem of dust pollution in the fertilizer manufacturing process, it is necessary to set up a dust collector room and dust collector equipment in the process of fertilizer production. Tianci Fertilizer Machine Manufacturer have designed a special cyclone dust collector to remove dust from the organic fertilizer manufacturing process. And in the construction of fertilizer plant, dust collector room is more suitable for large NPK fertilizer production line, we can help customers build dust collector room.

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.

compound fertilizer equipment

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 and 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.