What is Nitro-based NPk compound fertilizer and its production process?

What is Nitro Based npk compound fertilizer and its characteristics?

Nitro based npk compound fertilizer is a new type of chemical fertilizer that has been developing rapidly in my country in the past 10 years. It uses ammonium nitrate as the nitrogen source, adds phosphorus, potassium and other compound fertilizer raw materials, and performs secondary processing to produce high-concentration compound fertilizer.
Nitro compound fertilizer also contains nitrogen, phosphorus, potassium and other nutrients needed for crop growth. It has balanced nutrients and high content of active ingredients. It can be used as base fertilizer and top dressing for various cash crops, oil crops, and dryland crops. It is widely used in various types of crops. It can also save a lot of fertilizer packaging, transportation, storage and fertilization costs. It is a high-quality fertilizer with significant yield increase effect and good economic and social benefits.
At present, nitro compound fertilizer products have been demonstrated in different regions, different soils, various fields and commercial crops in the country. Compared with the same amount of urea, the application of nitro nitrogen fertilizer can increase the yield of crops by 8%-25%, and the quality has been significantly improved.

What are the 3 types of production processes of nitro compound fertilizer?

At present, our country’s chemical fertilizer industry mainly uses nitrogen, phosphorus, and potassium as raw materials, and uses physical or chemical synthesis methods to produce three-element compound or compound fertilizers.
With the development of the chemical fertilizer industry, new processes are constantly emerging, such as the process of preparing nitro compound fertilizer using the chelation method. Although the chelation process can promote the synergy between various nutrients and improve the absorption of nutrients in the soil, Transformation and utilization, but chelating agents need to be added during the production process, and whether it can be industrially produced requires further verification.
The main production processes of nitro compound fertilizer include drum spray granulation process, tower melt granulation process and pellet compound granulation process.

What is Nitro compound fertilizer spray drum granulation process?

The drum shotcreting granulation process is a relatively mature production process in the industry and is also a process route with a wide range of applications. The process mainly uses ammonium nitrate solution, ammonium dihydrogen phosphate and potassium salt as the main raw materials.
This process is mainly a physical process, using half slurry pelletizing and two-stage drying to return the material. In the production process, the drum equipment can directly use the high-temperature concentrated ammonium nitrate solution drawn from the concentration section of the ammonium nitrate workshop as raw material, and use the sensible heat and crystallization heat of the ammonium nitrate solution to provide the heat required for material granulation, so that the material bed can roll The particles reach the appropriate particle size through continuous coating, bonding and crystallization.

What are the 2 advantages of Spray drum granulation method of nitrate based compound fertilizer?

Nitro based npk compound fertilizer spray drum granulation process

The use of ammonium nitrate solution in the drum spraying process is safer than the use of solid ammonium nitrate, and avoids the explosion hazard that exists when solid ammonium nitrate raw materials are crushed;
At the same time, two-stage low-temperature drying in series is used in the drying process, which not only avoids the loss of nitrogen caused by high-temperature decomposition, but also ensures the moisture content requirements of the final product. Several domestic factories have adopted this method to produce nitro compound fertilizers, and there have been no safety problems in the past few years. However, this production process involves a large area of land, a long process, and a large number of equipment.

What is the principle of nitro compound fertilizer tower melt granulation process?

The tower melt granulation process uses nitric acid, phosphoric acid, ammonia and potassium salt as the main raw materials, uses mixed acid to neutralize, the slurry is concentrated and potassium is added, and the tower granulation process is completed.
This process mainly takes advantage of the low viscosity and good fluidity characteristics of the ammonium nitrate solution in the components. It mixes nitric acid and phosphoric acid, ammoniates and then concentrates. The crushed potassium chloride is quickly mixed with the slurry under stirring. The mixed slurry is sprayed into a thin stream through the centrifugal granulator, and then falls from the top of the tower in the form of a single droplet, cooling and crystallizing.

What are the advantages of tower prilling granulation of nitro compound fertilizer?

The tower melt granulation process uses concentrated ammonium nitrate solution without drying, which simplifies the subsequent drying operation. Simple operation makes it easier to automate operations. At the same time, it is cooled and agglomerated into granules during the granulation process, and has gradually solved technical problems such as poor flow of high-viscosity solid-liquid mixtures and easy clogging of granulation nozzles.

What are the disadvantages of tower prilling granulation of nitrate based compound fertilizer?

However, the tower granulation process has higher requirements for production process control from a safety perspective. Because when the ammonium nitrate solution is concentrated, the material is prone to overheating and decomposition, causing the generation and accumulation of nitrogen oxides. Therefore, during the production process, it is necessary to ensure the normal operation of the spray condensation system to maintain the negative pressure of the flash chamber.
At the same time, in the potassium-doping mixing process, adding KC1 to the mixture at low pH and high temperature will worsen the thermal stability of each component of the mixture, so it may decompose and release nitrogen oxide and HC1, creating an explosion hazard.

What is the mixing granulation of nitro compound fertilizer method?

The nitro compound fertilizer pelletization compound granulation process is a simple physical process. The process is mainly to add some of the required main raw materials to the granulator according to the proportion, add adhesive to improve the viscosity of the materials, and continuously rotate the granulator to make the materials in the machine stick together based on the viscosity of the raw materials. , and grow into balls to obtain particles of a certain particle size, which can be dried.

What are the disadvantages of nitro compound fertilizer pelletizing method and compound granulation?

Although no chemical reaction occurs during pellet compounding and granulation, since the process requires viscous raw materials, there are strict requirements on the selection of raw materials.
During the granulation and drying process of this process, the materials are easily bonded together when heated to form a muddy paste, which reduces the granulation and pelletizing rate. It is also easy to form scale on the walls of granulators, dryers and other equipment, causing Difficulty cleaning. Therefore, the pellet compound granulation process has an increasingly high elimination rate for the production of high-nitrogen varieties of nitro compound fertilizers.
At the same time, because the pellet compounding and granulating process is a relatively old process route, most of them are small factories with backward technology and rudimentary equipment. Generally, it is only suitable for producing fertilizer seeds with less than 30% of total nutrients. It is a low-end route and its market share is declining year by year.
Through a brief discussion of the three relatively mature industrial production processes of nitro compound fertilizers, it can be seen that the pellet compounding method is a relatively backward process and is gradually being eliminated; while the tower melt granulation process and the drum Shotcrete granulation is currently widely used in large and medium-sized enterprises.
However, when it comes to selectivity, we must comprehensively consider the raw material route, processing technology, equipment and production safety.

What are the advantages of nitro compound fertilizer?

Compared with traditional chemical fertilizers, the advantages of nitro compound fertilizers are: nitro compound fertilizers contain two forms of nitrogen fertilizers. Nitrate nitrogen can be directly absorbed by crops and takes effect quickly; ammonium nitrogen fertilizer has a long effect, ensuring a continuous supply of nutrients and a long-lasting fertilizer effect, so that the crops are full in the early stage and do not lose fertilizer in the later stage.
Nitro compound fertilizer is easily soluble in water and has good solubility.
Nitrate cannot be adsorbed by soil particles, is highly mobile, and is relatively easily absorbed by plant roots. It can promote the early growth of crops, enter the vigorous period earlier, and promote early maturity;
As a quality element, potassium in nitro compound fertilizer can ensure full grains in the later period and improve quality. 5. Does not contain chloride ions or has low chloride ion content.
The sulfur in nitro compound fertilizer helps plants synthesize glucosides and increases aroma and flavor.

What are the disadvantages of nitro compound fertilizer?

It is highly hygroscopic and can be converted into liquid after absorbing moisture during the rainy season.
Easy to lose nitrogen. Under waterlogged or anaerobic soil conditions, nitrate ions are denitrified due to the action of denitrifying bacteria, forming nitrogen oxide gas or nitrogen that cannot be utilized by crops. Denitrification often occurs in paddy fields.

What kind of soil is nitro compound fertilizer suitable for?

Dry land. Drought is common in the vast western and northern regions of my country.
The application effect is better on neutral or alkaline (slightly alkaline) soil.

What kind of crops is nitro compound fertilizer suitable for?

Nitro compound fertilizer is generally ideal for top dressing in dry farming and has a good yield-increasing effect. When used in paddy fields, nitrate nitrogen easily enters the reducing layer of the paddy field with water. In the reducing layer, due to denitrification, it is reduced to nitrogen or oxidized nitrogen and escapes from the water surface and is volatilized, causing crop nitrogen deficiency. In addition, anaerobic decomposition may also produce more hydrogen sulfide gas, which may poison the seedling roots and cause abnormal physiological phenomena such as “red leaves, yellow leaves” in the seedlings.
Nitro compound fertilizer is effective when used on chlorine-sensitive crops, such as most fruit trees, Chinese medicinal materials, etc.
Nitro compound fertilizer is more effective when applied to sulfur-loving crops. Such as potatoes, soybeans, peanuts, rapeseed, onions, garlic, etc.

Domestic market forecast of nitro compound fertilizer

On the one hand, the domestic nitro compound fertilizer market has huge potential. Fertilizer companies that can produce nitro compound fertilizer will maintain their dominant position in the future, and the market prospects are promising.
According to statistics, in recent years, the area of cultivated land used to grow vegetables and fruits in my country has increased by more than 1 million hectares per year on average, and now reaches about 32 million hectares. Theoretically, there are 700 million acres of cultivated land in my country suitable for the application of nitro compound fertilizers.
According to relevant agricultural technical indicators, their demand for nitrosulfide-based compound fertilizers is approximately 30 million tons. From the perspective of nitrogen alone, it is estimated that my country’s current nitrate nitrogen fertilizer market capacity is 4-5 million tons, and the long-term market capacity is 8-10 million tons.
From the perspective of supply, my country’s actual nitrate nitrogen fertilizer production is currently less than 1 million tons. There are more than 20 nitro compound fertilizer manufacturers with a total production capacity of about 5 million tons. There are not many compound fertilizer companies with ammonium nitrate resources. It is estimated that there are about 10 million tons of nitrate nitrogen projects (nitro-containing compound fertilizer) currently under construction.

Conclusion:

This year, the nitro compound fertilizer market is also constantly expanding, and the market demand is also expanding. Many manufacturers have made money by making high-tower compound fertilizers, which has led to more manufacturers launching a large number of new projects. In this way, the production capacity will be reduced in a short period of time. It will not have a big impact on the price, but the sudden increase in production capacity after the new production line is put into mass production will cause the price to drop rapidly. Therefore, we still advise everyone here that the market is risky and investment needs to be cautious.