How to get NPK granules coated?

Processing sulfur coated urea in 15 t / h NPK fertilizer production line
Sulfur coated urea is a kind of coated slow release nitrogen fertilizer. In the process of NPK fertilizer production line, spherical urea is coated with a layer of molten sulfur to improve the physical properties of urea.

Sulfur coated urea is increasing in agricultural applications. With the increase of high concentration fertilizer application rate, the application amount of sulfur-containing super phosphate was relatively reduced, and the crop yield increased. The amount of desulfurization in soil increases, and the area of sulfur deficient land is expanding at home and abroad.

Therefore, the application of sulfur coated urea can not only improve the utilization rate of nitrogen, but also supplement the sulfur in soil.

Fertilizer Drying Machine for Chicken Manure
Fertilizer Drying Machine for Chicken Manure

Sulfur urea fertilizer production line equipment

Zhengzhou SX Heavy Industry Technology Co., Ltd. produces various NPK fertilizer production lines, organic fertilizer production lines and fertilizer granulation production lines. As shown in the figure, our plant specially designed a 15 t / h sulfur coated urea fertilizer production line. Sulfur urea production line equipment: 1 loader feeding hopper, 3 large angle belt conveyors, 1 rotary drum heater, 1 coating machine, 2 rotary drum powder machines and 1 fertilizer packaging machine for npk.

Processing technology of sulfur coated urea in NPK fertilizer production line

Urea particles are heated by a heater and then coated with a sulfur-containing outer film. After urea coating, it is sent to powder machine by large angle belt conveyor. The powder machine sprays particles to seal the cracks of the coating and reduce the biodegradation of the sulfur coating. Two series of machines are used to ensure the quality of fertilizer. The coating of NPK fertilizer production line on the outer layer of urea ensures the slow release of fertilizer efficiency.

The outer envelope provides a physical barrier for urea, so that urea is slowly permeated by water and decomposed by microorganism. In the soil environment, urea gradually diffuses through the envelope, and releases nutrients slowly through the envelope cracks and the structure formed naturally on the envelope surface.

How to make npk fertilizer graules?

The physical and chemical properties, apparent structure and internal structure of products produced by different NPK compound fertilizer production processes are different. It leads to the difference of nutrient release, soil acidity and root zone nutrient change, which affects the relationship between nutrient release rate and soil nutrient supply and demand, and finally leads to crop growth. Differences in yield and fertilizer efficiency.

NPK Fertilizer Production Line Design Layout

Therefore, the difference of fertilizer efficiency between different processes of compound fertilizer is due to the differences of physical and chemical properties and structural characteristics of compound fertilizer itself, as well as the difference of manufacturing technology. In order to improve crop yield and fertilizer efficiency, NPK fertilizer production process must be improved.

NPK fertilizer production process solid aggregate method

In this method, single alkali fertilizers (such as urea, ammonium nitrate, ammonium chloride, ammonium sulfate, ammonium phosphate, potassium chloride and sulfuric acid) are used as raw materials. After grinding to a certain fineness, the raw materials are gathered and granulated in the drum of the rotary granulator by adding water and heating.

In the process of granulation, a small amount of phosphoric acid and ammonia can be added into the rotary drum granulator to improve the granulation conditions of NPK fertilizer production. It is one of the methods widely used in the world to obtain compound fertilizer products by drying, sieving and cooling granular materials. This method was used by the early United States, India, Japan, Thailand and other Southeast Asian countries.

Production of NPK compound fertilizer by solid polymerization

Zhengzhou SX fertilizer machine manufacturer, with strong technical strength, advanced fertilizer granulation technology, excellent product quality and perfect service system, has become a fertilizer production equipment industry by customers praise and trust manufacturers. We provide NPK fertilizer production machinery, and can design professional compound fertilizer production process for you. Our NPK compound fertilizer production equipment sells well in China, as well as the United States, South Korea, Malaysia, Australia, Thailand, Vietnam, Indonesia, Philippines, Pakistan and other countries.