Improving the granulation rate of drum granulator is conducive to improving the efficiency of the whole NPK compound fertilizer production line. Whatsapp: +86- Tel: + 86-371-63290355 ... The optimum dosage of calcium, magnesium and phosphorus fertilizer is not more than 10 kg per ton, usually 5 kg per bushel. ...
The results showed that the optimal filling level of the shear granulator was about 9%, which was slightly lower than that of the drum granulator (12%). ... Compared with the drum granulator, the ...
Drum granulator is a kind of fertilizer granulator machine can make the material into a specific shape. Drum granulator is one of the key equipment of the compound fertilizer industry. It is suitable for large-scale production of cold …
The strike point differs according to the filling degree of the drum. For example, for an over-loaded drum, most of strike points are found to be on the bottom solid bed surface, while for the case of optimum-loaded drum, the bottom solid bed is no longer exists (see Figure 1).
It has been suggested that the optimum drum speed is half the critical speed, where the critical speed is defined as the speed at which the dry material will be carried around the drum by ...
However, fast firing rate causes transient changes in both the drum-boiler steam pressure and drum level, in addition to the potential of developing of thermal stresses in the walls of steam risers.
The continuous production of 3 to 4.5 mm NPK-granules is achieved by spraying an appropriate mixture onto recycle or reflux (undersize) product in a rotating drum.
Q: The drum granulator is in a misaligned state. How to adjust the position? Answer: 1 The riding wheel is worn. Repair or replace the riding wheel according to the degree of wear. 2 gear wear. You can fix, remove and replace gears according to the wear rate of the drum granulator. Q: The drum granulator gear is in a misaligned state. How to ...
The results showed that the optimal filling level of the shear granulator was about 9%, which was slightly lower than that of the drum granulator (12%). However, the uniformity, bed permeability and the fracture strength of the granules from the shear granulator were significantly better than those from the drum granulator.
The granulation drum is a wet granulation (aka tumble-growth, agitation, or non-pressure agglomeration) device, following the same principles as other wet granulation equipment, which utilize motion, in combination with a liquid binder (in most cases), to promote granule formation. The …
Granulation kinetics studies indicate 5 min of granulation to be the optimum residence time. The optimum granulation moisture content is dependent on the iron oxide ore sinter feed blends …
The drum is made of St37 material with a wall thickness of 12 mm. According to the researches, drum granulators with 10t/h production capacity are generally operated effectively at 11 rpm. For this reason, the drum granulator was designed to have a drum speed of 11 rpm, engine speed of 1450 rpm, and a total gear ratio of (i) 131.8.
the degree of filling of the drum, usually controlled by an internal ring separating the spraying and tumbling sections, ... For a given drum and a given granular product, there is an optimal peripheral speed that gives the …
It has been identified that the drum rotation-rate, bed depth (material charge), and moisture content of solids are practical decision (design) parameters for system optimisation. …
A schematic diagram of the drum granulator is shown in Fig. 1. The drum was transparent Plexiglas with a diameter of 7.5 cm and a width of 12.0 cm. The drum was mounted axially with a motor connected to one end to allow for rotation of the drum. An opening at the other end allowed for a sparger to be inserted into the drum.
In choosing between a drum granulator and a disc pelletizer, the drum is often chosen because it offers a higher throughput than the disc pelletizer. The rotary drum also has the advantage of being a "closed" system, meaning that …
According to the researches, drum granulators with 10t/h production capacity are generally operated effectively at 11 rpm. For this reason, the drum granulator was designed to have a …
Optimum drum speed is also influenced by the powder flow properties of the feed material. Figure 8.1. A typical disc granulator (Capes, 1985) ... In contrast to discs, there is no output size classification in drum granulators and high recycle rates of off-size product are common. The desired granule motion is a tumbling,
granulator. The total length of the drum is 8m and the drum diameter is 2m. The drum is gear driven and has a tilt angle of 2-3°. 2-4 mm granules with a moisture content of about 60-65% (for fertiliser) are obtained in the drum granulator. The drum granulator process started with the preliminary preparation process. In
Major process parameters in all types of granulators are the liquid volume [7, 24,27], granulator size, rotation speed, inclination angle [29,30,31] and filling rate [32]. The …
The fluidized-bed granulator (FDG) involves the use of a fluidized bed in a drum granulator, which is a horizontal cylinder fitted with internal flights.
The design of drum type granulators consists of selecting the optimum dimensions of the drum and its operating conditions, which will yield the desired granule size and specified quality, and the desired ... This second effect is based on the decrease of the coefficient of filling from the feed to the dis- charge end and the deviation of the ...
A dimensionless flow parameter combining the effects of Froude number, relative particle size and volume filling is proposed in this study, which controls the flow characteristics in a rational drum such as dynamic angle of repose, thickness of the flowing layer, relative free surface velocity, and the shear rates in the flowing layer.
The mixing and granulation performance and the effect of granulation on sintering indicators were analyzed. The results showed that the optimal filling level of the shear …
reactions. A granulator converts fine powdrs to granules via a series of physical rate processes. Chemical reactor engineering is very well established. We can apply many of the methologies from reaction engineering to approach granulator designT. here are four natural scales of analysis for a granulator or reactor (figure 1-4): 1.
The resulting NPK-paste has a composition of 12−28 wt.% H 2 O and is granulated in rotary drums, followed by screening and crushing to the commercial grade product. The overall flowsheet is given in Fig. 1. Undersize and crushed oversize fractions are recycled to the granulator. The product is further dried, cooled and evacuated to the silos.
diameter of granulator drum D = 0.25; 0,3; 0,35 and 0.40 m, drums length L=0.4 m, filling of the drum with granular material φ = 5% to 20%, angular velocity of the drum = 1.05 to 3.35 rad/s. The investigations were performed in four drums that had the same length L and different diameters. The range's change of drum angular velocity
For this reason, the drum granulator was designed to have a drum speed of 11 rpm, engine speed of 1450 rpm, and a total gear ratio of (i) 131.8. The frame is designed to allow the drum to operate ...
The optimal speed of the drum granulator is 35% to 50% of the critical speed. The small drum granulator takes a large value, and the large one takes a small value. ... equipped with locking rings to prevent material overflow and ensure the filling coefficient of the material inside the drum granulator. The filling coefficient is related to the ...
The results showed that the optimal filling level of the shear granulator was about 9%, which was slightly lower than that of the drum granulator (12%). However, the uniformity, bed permeability and the fracture strength of the granules from the shear granulator were significantly better than those from the drum granulator.
In practice, good granulation can be achieved in drums containing no internal flights at speeds nFr~0.3--0.5. For drums containing internal flights, the optimum speed for good …
Granulator: spherodizer or drum granulator Slurry feed d Crushed oversized and undersized particles Product is collected Roll crusher Oversized particles Product-sized particles Undersized particles Crushed oversized particles Figure 1:Schematic diagram of granulation loop. granulation process. The recycle feed ow rate as well
A dimensionless flow parameter combining the effects of Froude number, relative particle size and volume filling is proposed in this study, which controls the flow characteristics in a rational drum such as dynamic angle of repose, thickness of the flowing layer, relative free surface velocity, and the shear rates in the flowing layer.
optimum filling rate of drum granulator. ... IH 24 The influence of granulator diameter on densification 62 111 25 Densification factor for various materials in a drum granulator 63 HI 26 …
The production capacity (100 ton/h) and desired granule size were the first target parameters ... In modeling of the fluidized drum granulator, the solid axial flow rate is assumed to be
The moisture content should be at optimum levels depending on the material. Apparently, there is an optimum amount of liquid binder to produce granules. To a certain extent, the more liquid …
The drum granulator has the advantage of being a continuous and robust process, but since the rheology of dense granular flows is a matter of current research [1,182,25], the agglomeration ...