The GZL series dry rolling granulator is used in the dry extrusion process technology to compress powdered materials with a moisture content of less than 5% into clusters. After crushing, granulation, and screening processes, the clustered materials are transformed into granular materials that meet the requirements for use. Dry rolling granulation mainly relies on external pressure to force the material through the gap between two counter rotating rollers, compressing it into a ball. During the rolling process, the apparent density of the material can increase by 1.5-3 times, thereby achieving a certain strength requirement.
Various dry powder materials are added from the top of the equipment, and after degassing and spiral preloading, they enter two equal rolling rolls. The rolling rolls rotate relative to each other, and the materials are forced into the gap between the two rolls. The grooved rolling rolls bite the materials into the gap and are forced to compress them. After passing through the compression zone, the surface tension and weight of the materials naturally release them. The detached finger shaped agglomerates enter the crusher and are crushed by a rotating blade. The crushed material enters the granulator and is sieved by a rotary vibrating screen through a rolling blade. Qualified products are transported to the finished product warehouse through a conveyor. The powdered screened material is sent back to the raw material warehouse for secondary rolling through a conveyor, and the squeezing force can be adjusted by the pressure of the hydraulic cylinder according to the needs of the granulation operation. By changing the groove form of the roller surface, sheet, strip, and flattened spherical materials can be obtained.
The raw materials are fed into the bucket elevator through the feeding port via a screw conveyor, and the raw material powder is sent into the vibrating raw material bin. The material is then fed into the variable frequency screw feeder through a quantitative feeding machine for pre compression. The pre compressed material is pressed into the middle of two pairs of pressure rollers that are opposite to each other for compaction. The pressing force is transmitted to the material through the pushing force of the oil cylinder from the pressure rollers. The compacted sheet-like material is automatically removed from the tank and enters the crusher, where it is crushed into unevenly sized particles, and then enters the granulator for trimming. The trimmed particles are squeezed out through a sieve plate with mesh holes and enter the screening machine. The finished particles are sieved and then sent to the finished product warehouse through a bucket elevator. The screened powdered material is returned to the raw material bin through a screw conveyor and compacted again to complete a closed cycle.
The material is compressed and formed by mechanical pressure without adding any wetting agent, ensuring the purity of the product. Directly producing dry powder without the need for subsequent drying processes is more conducive to the connection and transformation of existing production processes. The particle strength is high, and the increase in bulk density is more significant than other granulation methods. Especially suitable for increasing the density of product stacking. It can control environmental pollution, reduce powder waste and packaging costs, and improve product transportation capacity. Compact structure, easy maintenance, simple operation, short process flow, low energy consumption, high efficiency, low failure rate, adaptable to a wide range of raw materials, and roller pressure can be freely adjusted according to different materials. The feeding and feeding device adopts electromagnetic stepless adjustment and variable frequency stepless adjustment control, with high degree of automation and the ability to achieve multi machine control by one person, and low labor intensity. The main transmission components are made of high-quality alloy materials, stainless steel materials, titanium materials, chromium and other surface alloys, greatly improving wear resistance, corrosion resistance, high temperature resistance and pressure resistance, making the machine have a longer service life.
