Twin Drum Mixing Systems

Mixing is movement of each particle to an exact position with other Particles, and avoid segregation of already mixed material.

• Homogeneous mixing independent of particle size and density.
• Free particle movement.
• Minimal heat generation
• Gentle mixing
• Low chear

• Quick inspection
• Easy cleaning

• Fast emptying
• Reduced segregation
• Minimal residue

• Various steel options available.

• Low friction
• Minimal wear
• Low maintenance
• Low running cost

• Overlapping paddles
• Optimal particle movement
• Fluidization
• Short mixing time
• Control of main particle movement
• Insignificant dynamic forces on structural steel work and buildings

The complete design of STAR TRACE Mixer Combine fast mixing with slow shaft speed and gentle product handling resulting in highly homogenous mixes after extremely short mixing times.

Carefully positioned paddles on two low speeds, counter rotating shafts create a fluidized zone with low power consumption.

This means very low shear and friction which in turn makes the mixer ideal for fragile products which cannot tolerate rough handling.

We are able to add liquids at much higher rates than normally possible, due to the high particle movement capacity and fluidization of the particles. All the material surfaces are constantly being exposed for maximum dispersion. It is possible to add small or large amounts of liquid, with high or low viscosity to powders, granules or pellets.

The STAR TRACE mixer consists of twin drums with two counter rotating rotors and specifically angled paddles. The rotors overlap in the centre of the mixer and the paddles completely sweep the bottom and mix all the material at the same time.

In zone B the materials have a main movement counter clockwise at the perimeter of the mixer.

Simultaneously there are movements in the fluidized zone A both up and down, left and right and back and forth, All the time with space between the particles allowing free and random movement.

The interaction of the two zones is the key to the unique fore berg mixing Technology as all particles are transported into a highly homogeneous mix.

The STAR TRACE mixer is very flexible in filling volume. The model number indicates the NOMINAL filling level i.e., the level just above the rotor shafts, and is not to be mistaken for the total mixing volume.

From our nominal filling level of 100% variations from 40% to 140% can be tolerated with the same perfect mixing results. The mixing time may be a few seconds longer than normal when mixing very small or very large batches.

When adding liquid to powders which tend to agglomerate, a Flow Distortion Bar (FDB) is used to improve the performance. The FDB consists of a rapidly rotating bar with pins. It creates a moving curtain of material over the paddles during spraying for maximum exposure and adding of shear.

When higher shear is required the use of Pin Mill System is employed. It consists of two rapidly rotating bars with pins and a stationary shroud. The Pin Mill system is used for breaking lumps and agglomerates which may be present. When using FDB and Pin, Mill System the mixer should not be under filled.

Model	Batch Size (Liters)			Motor Rating (H.P) *
	Min	NOR	MAX	STD	MAX
ST - 20	8	20	28	1.0	1.5
ST – 60	24	60	84	3.0	5.0
ST – 120	48	120	168	5.0	7.5
ST – 200	80	200	280	5.0	7.5
ST – 350	140	350	490	5.0	10.0
ST – 500	200	500	700	10.0	20.0
ST – 750	300	750	1050	15.0	30.0
ST – 1200	480	1200	1680	20.0	40.0
ST – 2000	800	2000	2800	40.0	60.0
ST – 2500	1000	2500	3500	40.0	60.0
ST – 3600	1440	3600	5040	5.0	75.0
ST – 5000	2000	5000	7000	60.0	100.0

STD - Standard Motor Rating
MAX - Maximum Motor Rating
* The motor rating is dependent on the material, Bulk density etc. To be mixed. Technical data might be changed without warning.

Provide easy access for inspection and cleaning of the mixer interior. The doors are constructed to be flush inside the mixer when closed and are easily maintained.

(Guards removed)

Model ST - 60 to ST - 2000 include a heavy duty multiple link chain drive with chain tensioner. ST-20 has direct gear wheel drive. ST-2500 and upwards include direct mounted, interconnected shaft drive.

(Discharged doors)

The models up to ST - 2000 are equipped with two direct acting air cylinders on each door. From ST - 2000 and upwards one cylinder per side activate a self activate a self locking device.

Abrasives Agrochemicals Animal feed Break pad material Cement Ceramics Cereals Chemicals Coating Coffee Construction material Detergent Diamond powder Dry mortar

Electrode mass Explosives Fertilizer Fish food Flour Fly ash Fruit Fungicide treatment Glass Meal Metal powder Milk Powder Muesli Peat Petfood Pharmaceuticals

Plastics Polymer Chip Premixes Powders Research & Development Road Lining Material Salt Sand Sewage Sludge Snacks Soups Sugar Thermosetting Powder Vegetable Vitamins

Start	After 2 Seconds	After 5 Seconds	After 10 Seconds