Dry roll press granulator
DH series dry roll press granulator adopts dry rolling technology to compress the powdery materials with moisture content ≤ 5% into pieces or tablets, then going through the processes of breaking into granules and screening to make the lump materials into granules that meet the requirements of application. Dry roll press granulator mainly depends on the manner of external pressure to force the material going through the gap between two relatively turning rollers to compress into laminar particles. During course of roller pressing, the real density of materials can increase 1.5~3 times thus reaching certain demands of granular strength.
|Model||Roller Diameter (mm)||Valid Usable width (mm)||Roller speed (rpm)||Rolled sheet output (kg/h)||Final product output (kg/h)||Granule size (mm)||Main unit power (kw)||Total power (kw)||Diamension (m)
|Total weight (t)|
1.Without any additives, dry powders are granulated directly.
2.Granular strength can be adjusted by adjusting the pressure of roller, control strength of final products.
3.Cycle operations to achieve continuous production.
4.Materials are force to compress molding by mechanical pressure, without any additives, the product’s purity is guaranteed.
5.Dry powders are granulated directly without follow-up drying process, the existing production process is easy to convergence & transformation.
6.Granular strength is high, compared with other granulating methods, the improvement soft bulk density are significant，especially for the occasion where increase the proportion of product accumulation.
7.A wide range of raw materials can be used, granular strength can be freely adjusted according to different materials.
8.Compact structure, easy maintenance, simple operation, short process, low energy consumption, high efficiency, low failure rate.
9.Control environmental pollution, reduce waste and powder packaging costs, and improve product transport capacity.
10.Feeding device adopts frequency adjustment control, high automation ,one can control multi-machine, has the features of low labor intensity and long term continuous operation, etc.
11.Major transmission components use high quality alloy material. Stainless steel, titanium, chromium and other surface alloys which greatly improved wear resistance, corrosion resistance, high temperature and pressure capabilities, so that this machine has one long service life.
The raw material is evenly fed into the feeding hopper through the quantitative feeder. The rolling machine uses a pair of rolls with holes, leaving a certain gap with each other, and the two rolls rotate in opposite directions at the same rotation speed. One roll bearing chock does not move in the frame, and the other roll bearing chock moves along the frame rails, tightly pressing against each other by means of hydraulic cylinders. A plurality of holes of the same shape and size are regularly arranged on the surface of the roll, and the troughs are aligned with the troughs.
At this time, the dry powdery material continuously and uniformly feeds the two rolls from above and between the two rolls, and the material first flows freely, and then enters the biting area and is gradually bitten into the trough by the rolls. With the continuous rotation of the roll, the space occupied by the material is gradually reduced and material is gradually compressed, and reaches the molding pressure. Subsequently, the pressure gradually decreases, and the pressed block loses its own weight and falls off the hole to enter the crushing and granulating device, and the obtained finished product is a granular qualified product, which is subjected to scale packaging. The powder and the unqualified super large particles from the powder mouth are re-entered into the feeding hopper by the returning auger conveyor and mixed with the fresh material to be added to the pre-feeding hopper to enter the next process.