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Prilled urea is a common form of urea with various applications in various fields. The following is a detailed introduction to granular urea:
Prilled urea typically appears as small spherical particles. These particles are relatively uniform, normally ranging in diameter from 1 to 3 mm.
Its color is generally white or slightly light yellow, with a smooth surface and solid texture. Particles have good fluidity and can move smoothly in various containers and equipment, making them easy to store and transport.
The production process of prill urea involves a series of complex chemical reactions. Firstly, ammonia and carbon dioxide react under high temperature and pressure conditions to form ammonium carbamate. This reaction requires precise temperature and pressure control to ensure its smooth progress. Subsequently, ammonium carbamate is dehydrated and converted into urea.
Next, liquid urea is sprayed into the Prilling tower through a special nozzle. Inside the tower, urea droplets come into contact with air during their descent. Due to heat exchange and solvent evaporation, the urea droplets gradually cool and solidify into solid particles. The air circulation system inside the tower helps accelerate the cooling and solidification of urea particles and ensures the particles’ uniformity.
Prilled urea’s nitrogen content is as high as about 46%, making it an efficient nitrogen source. In agricultural production, it can provide sufficient nitrogen elements for plants, promote their growth and development, and increase crop yields.
For example, in the planting process of crops such as wheat and corn, the reasonable application of granular urea can significantly increase crops’ protein content and yield.
Prilled urea is characterized by slowly releasing nitrogen. It gradually dissolves in the soil, releasing nitrogen elements and providing a continuous nutrient supply for plants. This slow-release mechanism helps to improve fertilizer utilization and reduce nitrogen loss and waste.
For example, in the cultivation of some long-term crops, granular urea can meet the nitrogen demand of crops for a long time, avoiding nutrient waste and environmental pollution caused by excessive one-time fertilization.
Prilled urea has a low moisture absorption rate at room temperature. This means it is not easy to absorb moisture from the air during storage and remains dry. A low moisture absorption rate helps prevent moisture and clumping of granular urea during storage, extending its service life.
Base fertilizer: Prilled urea is used as a base fertilizer to provide a stable nitrogen supply for crops. Before planting, granular urea is applied to the soil to slowly release nitrogen through the action of soil microorganisms, providing long-term nutrient support for crop growth.
Topdressing: Crops should be topdressed in a timely manner according to their growth stage and needs during growth. Prill urea can provide additional nitrogen to crops through methods such as spraying and hole application, promoting crop growth and development.
Foliar fertilization: Prilled urea can be dissolved in water to make foliar fertilizer. Through foliar spraying, plants can quickly absorb nitrogen, improve the photosynthetic efficiency of leaves, and enhance crop stress resistance.
Soil improvement: The decomposition of prilled urea in soil produces ammonia and carbon dioxide, which helps improve soil structure and enhance soil fertility. It can regulate soil pH, increase soil permeability and water retention, and create a favorable soil environment for crop growth.
Chemical raw materials: Prilled urea is essential for many chemical products. For example, it can be used to produce urea formaldehyde resin and melamine. These products are widely used in plastics, coatings, adhesives, etc.
Industrial catalyst: Prilled urea is used in industrial production processes. For example, in the fields of synthetic rubber, plastics, etc., it can promote chemical reactions and improve product quality and yield.
Metal surface treatment: Prilled urea can be used for metal surface treatment, such as forming a protective film to prevent metal corrosion. It can also be used to clean metal surfaces and remove oil stains and impurities.
Feed additive: Prilled urea can be added to animal feed as a nonprotein nitrogen source. In ruminants’ rumens, urea is broken down to produce ammonia, which microorganisms utilize to synthesize protein, thereby increasing the animal’s protein levels. However, using prill urea as a feed additive requires strict dosage control to avoid animal poisoning caused by excessive intake.
Animal farming: During animal farming, it can be used as a nutritional supplement to provide additional nitrogen elements for animals. It can improve the growth rate and immunity of animals and enhance their health condition
Both Granular Urea and Prill Urea are common forms of urea. What are the differences between them? Please read Prilled Urea VS Granular Urea>>
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