Sulfur coating equipment installed for Australian customers

Sulfur coating equipment installed for Australian customers

The sulfur coating equipment installed for Australian customers has been engaged in fertilizer processing and production for a long time, with rich technical and market advantages. In order to improve production efficiency, sulfur coating equipment has been added. Greatly improve the production efficiency and quality of enterprises

Sulfur coating equipment mainly refers to industrial machinery used for fertilizer coating. The core function of this equipment is to evenly wrap molten sulfur on the surface of fertilizer particles (such as urea), forming a slow-release film layer to achieve slow release of nutrients and supplement sulfur elements.

Main types and working principles
Centrifugal coating machine: By rotating the centrifugal device, fertilizer particles are rolled in the coating chamber, and molten sulfur is sprayed or sprayed on the surface of the particles to achieve uniform coating using centrifugal force. This equipment is usually equipped with a heating system to prevent sulfur from solidifying during the coating process.

Molten sulfur spraying system: The core process is to send preheated urea particles into the spraying chamber and wrap them with flowing molten sulfur. This process is often assisted by microcrystalline wax sealant and silicon magnesium soil regulator to construct a three-layer coating structure for precise control of nutrient release rate.

Key components
Heating system: used to melt sulfur and maintain its liquid state, preventing solidification due to temperature drop during the coating process.

Coated warehouse and silo: Coated warehouse is the area where fertilizer particles come into contact with sulfur and complete the coating reaction; The silo may be used for storing or pre-processing raw materials, with a permanent mesh between the two to prevent uncoated fertilizers from falling into the silo.

Mixing and centrifugation device: The mixer ensures uniform mixing of materials; The centrifugal device controls the coating time and separation efficiency by adjusting the rotational speed, reducing sulfur waste.

Process characteristics and advantages
Cost advantage: As a coating material, sulfur has a much lower cost than polymer resin materials, making it an economical choice for slow-release fertilizers.

Dual function: After being decomposed by microorganisms in the soil, the sulfur film layer not only slowly releases nitrogen, but also provides sulfur nutrients for crops, and has the function of improving saline alkali land.

Technological evolution: In the early days, pure sulfur coating had problems with film brittleness and easy cracking. Later, technologies such as sulfur resin double-layer film were developed to improve the durability and controlled release stability of the film.

Application Scenario:
The sulfur coated equipment is mainly used to produce sulfur coated urea (SCU), a slow-release fertilizer. Its core application scenarios are concentrated in the agricultural field, aiming to achieve slow release of nutrients, improve fertilizer utilization efficiency, and improve soil environment.

Slow release fertilizer production: This equipment sprays molten sulfur onto the surface of preheated urea particles to form a three-layer coating structure (basic sulfur layer, microcrystalline wax sealing layer, and silicon magnesium soil regulating layer), controlling the nitrogen leaching rate within 24 hours and 7 days, thereby achieving slow release of nitrogen elements.

Saline alkali land improvement: After application, sulfur coated urea releases sulfur elements that can neutralize alkaline soil. At the same time, the pore structure of the coating layer helps to adsorb water, increasing soil water retention by about 18%. In the application of black soil in Northeast China, it can significantly reduce the number of topdressing times and increase crop yield.
Improving nutrient utilization efficiency: Through the synergistic release of dual nutrients, the fertilizer produced by this equipment can increase nitrogen utilization efficiency by 15% -20% and promote the activation of insoluble phosphorus in the soil. It is suitable as a base fertilizer or topdressing for crops such as corn, reducing nutrient loss.

In addition, the sulfur coating equipment also involves the pretreatment of sulfur raw materials and the packaging of finished products, but its core value lies in the realization of the slow-release function of fertilizers.