The dry extrusion technology is used to compress the water content of 2-8% and powder fertilizer into granules. After crushing, finishing and screening process, the block materials are programmed to meet the requirements of granular materials.
Dry rolling granulation mainly relies on external pressure, so that the material is forced to pass through the gap between two opposite rotating rollers and compress into pellets. In the process of rolling, the actual density of materials can be increased by 1.5-3 times, so as to meet certain strength requirements. The machine is affordable and has high output.
Principle of double roll extrusion granulator
All kinds of dry powder materials are added into the silo from the equipment department, and then enter into two equal rollers through degassing and spiral extrusion. The rolls rotate relatively, and the materials are forced to be sent between the two rollers. The rollers bite the materials into the gap for compression. After the materials pass through the compression area, the surface tension and gravity of the materials make them enter the rotary shaker for screening. The qualified products are sent to the finished product warehouse through the conveyor. The materials under the powder screen are sent back to the raw material bin again for secondary rolling through the conveyor. The extrusion pressure of powder granulating machine can be adjusted by the pressure of hydraulic cylinder according to the needs of granulation operation. It can improve quality and yield.
By changing the groove form of roll surface, sheet, strip and flat spherical materials can be obtained to meet the needs of customers.
Characteristics of dry powder fertilizer granulating machine
1. The material is forced to be compressed by mechanical pressure, and no additives are added to ensure the purity of the product.
2. The dry powder is directly granulated without using drying machine, which is more conducive to the connection and transformation of the existing production process.
3. The particle strength is high, and the increase of bulk density is more significant than other granulation methods. It is especially suitable for increasing the bulk density of products.
4. Control environmental pollution, reduce waste and packaging costs, and improve product transportation capacity.
5. Compact structure, convenient maintenance, simple operation, short process flow, low energy consumption, high efficiency, low failure rate, suitable for a wide range of raw materials, rolling pressure can be freely adjusted according to different materials.
6. The feeding and feeding device adopts frequency conversion stepless adjustment control, with high degree of automation, one person multi machine control, low labor intensity and long-term continuous operation.
7. The main transmission parts are made of high-quality carbon steel and stainless steel, which greatly improves the wear resistance, brain corrosion, high temperature resistance and pressure resistance, so the machine has a long service life.
Commentaires