Description:
GFZL series dry roller extrusion granulator is well designed and developed by our company according to customer's needs, on the basis of absorbing foreign advanced powder granulation technology carefully. This equipment can make powder raw materials directly into granular products satisfying the requirement of users, without adding any intermediates and additives. After granulation product size is uniform and the bulk density increases significantly, at the same time, it can effectively control pollution and reduce the waste of powder. It has scientific design, compact structure, simple technological process, convenient operation and usage, thus it is the ideal choice for granulation of your powder product.
GFZL series dry roller extrusion granulator adopts dry roller-extrusion technology, and it compact the powder with less than 10%of moisture content into tablets, then through crushing, granule processing, sifting or screening, the tablet material is turned to granules meeting application requirement. The granulator mainly relies on the outer compaction to force the material to go through the gap between two rollers rotating reversely, and then the material is compacted into tablets.During the compaction course, the exact compacted density of the material can increase by 1.5~3 times, so as to achieve a certain compactness requirements.

Working Principle:
When the raw powder material is degassed, then by the vibration feeding hopper, all kinds of powder materials are fed into the main sheet-rolling hopper evenly after being rationed by the horizontal screw feeder, keeping a constant feed granules in the main sheet-rolling hopper, and then longitudinal (or vertical) cone screw exerts to the powder material for pre-compression to form rolled sheets and conveys to the arc-shaped groove for two rollers. On two rollers’ surfaces there are evenly distributed oblate arc grooves or the diamond grooves, through a pair of gear meshing transmission, two rollers rotate reversely at same speed, and bite the material which is conveyed to the groove mouth by the conical screw into the groove, and instantaneously the forced compaction is conducted. After being compacted, as the pressure decreases, the materials fall off naturally from the groove under the action by its elasticity (surface tension) and gravity. Then extruded out finger-like strip agglomerated materials enter the crusher to be crushed by rotary knife group. The crushed material enters the granule-processing system. Through the rotary knife group or assembly, The granules and partial powder material to be processed is extruded into the rotary vibrating sifter for screening. Thus according to the size requirements from the user, the material receive sifting-out treatment and classification, thus uniform granular product conforming to the requirements of the quality is obtained, and the qualified products are sent to the product warehouse through screw conveyor or bucket elevator, and the sifted out unqualified powder will be returned to raw material bin through screw conveyor for being compacted again. Thus a closed recycling treatment is accomplished.
The compacting pressure can be adjusted though the hydraulic oil cylinder pressure in accordance with the demands for roller extrusion granulation operation.
Through changing the form of the groove on the roller, slice, strip and flat ball material can be obtained.

Features:
1. Material is compacted and shaped by mechanical pressure, it may not add any additives such as wetting agent. The dry powder can be granulated directly, and the product purity is ensured..
2. Particle compactness can be adjusted: by adjusting the roller pressure, the compactness of the finished product is controlled.
3. cycle operation, to achieve continuous production.
4. The output of finished product is high, and single unit output can reach more than 2000 kg/h (bulk density 1.5 x 103 kg/m).
5. Dry powder is granulated directly, no need to subsequent drying process, as is more favorableto the connection and transformation of thee existing process.
6. The compactness of granule is high, more remarkable bulk density rise than other granulation modes,especially it is suitable for the cases where product bulk density increases.
7. It can control environmental pollution, reduce the powder waste and packaging cost, and raise the capacity of product transport.
8. Compact structure, convenient maintenance, simple operation, technological process is short, low energy consumption, high efficiency, low failure rate, wider material application range,and the roller pressure can be adjusted freely according to different materials.
9. Feeding device and conveyance device adopt frequency conversion stepless control, and the automation level is high, which can achieve one person controls multiple machines. The labor intensity is lower and it can operate continuously for a long term and etc.
10. The main transmission parts all adopt high quality alloy material, stainless steel, titanium material,chrome and other surface-treated alloy，as greatly improves the capacity of abrasion-resistance, corrosion resistance, high temperature resistance and pressure resistance. Therefore this machine has a longer service-life.

Application:
Petrochemical industry, Bioengineering, Metal powder, Fine chemical, Pharmaceutical industry, Food-stuff, Pesticide, Chemical fertilizer, Mineral & coal.

Typically Applied Materials:
Granular capsule, pigment, detergent, catalyst, strontium carbonate, chemical fertilizer, White carbon black, inorganic salts, Chlorine Cyanide Urea, Bleaching agent, Pesticide, Oxide and etc.

Industrial Recycling Dust Materials:
Powder of Iron Foundry, converter dust, Lead, Zinc, filtrated dust, Aluminum dust, Grinding and other dust.
Note:During granule compacting process, some certain binder can be used for granule compacting when granule material is compacted between two rollers rotating reversely.