Double Layer Ribbon Powder Mixer Machine 800-1200kg Batch 15kW Drive

Blending is where many powder plants lose money quietly: an under mixed batch has to be reworked, an over mixed batch segregates. The WLDH horizontal ribbon mixer removes both risks by using a double layer ribbon that creates a forced convection pattern inside the trough. The outer ribbon pushes material from both ends toward the centre while the inner ribbon returns it from the centre to both ends, so the whole 800 to 1200 kg batch is exchanged several times per minute instead of relying on gravity or a single rotating drum.

That forced convection is why the horizontal ribbon mixer handles viscous, cohesive and slightly damp powders that refuse to blend in a tumbling mixer, and why it accepts liquid addition and paste dispersion in the same vessel. A jacket can be welded onto the trough, turning the blender into a combined mixing and drying or reaction unit, which is common in chemical, food and pharmaceutical intermediates where a wet mass must be homogenized before the next stage.

• Double Layer Ribbon Convection Mixing: the counter-flow between the outer and inner ribbon eliminates the dead zones that form at the ends of a single shaft paddle blender, giving a coefficient of variation of 5% or better in 8 to 12 minutes.
• High Loading Coefficient: the horizontal ribbon mixer fills up to 60% of the trough volume, so a compact 2000 L vessel holds an 800 to 1200 kg batch and saves both floor space and building height compared with a vertical blender.
• Viscous and Paste Capability: cohesive powders, wet granules and paste with up to 30% liquid addition are blended without balling, which suits pigment, detergent, ceramic and pharmaceutical wet mass preparation.
• Jacket Type Heating Option: a dimple or half pipe jacket on the trough and on the shaft allows hot water, steam or cooling brine to be circulated, so drying, cooling or a mild reaction can be carried out during blending.
• Full Discharge Butterfly Valve: a large bottom outlet with a pneumatic butterfly valve empties the trough in under two minutes with minimal residue, and a full opening inspection cover allows fast cleaning between products.
• Low Drive Power per Ton: a 15 to 22 kW drive handles more than one ton per batch, which is roughly a third of the installed power of an equivalent paddle blender working at the same throughput.

The horizontal ribbon mixer is chosen where throughput is high and the recipe changes less often, which is exactly the profile of the following duties:

1. Chemical powder blending: pigment, titanium dioxide, calcium carbonate, detergent powder and plastic additive masterbatch.
2. Food and feed premix: flour blends, seasoning, vitamin and mineral premix, where liquid fat or molasses is sprayed onto the powder bed.
3. Pharmaceutical wet mass preparation before granulation, replacing a slot mixer with a faster and more uniform batch.
4. Ceramic and refractory bodies requiring water distribution through a dry powder base.
5. Paste and slurry homogenizing in a jacketed trough with heating during blending.

Because discharge is fast and residue is low, the horizontal ribbon mixer also fits plants that run the same formula continuously in three shifts, where the limiting factor is turn around time rather than mixing quality.

Why choose a double layer ribbon instead of a single paddle shaft? A single shaft pushes material in one direction and leaves stagnant zones at both trough ends, so blend time rises sharply above 500 kg. The double layer ribbon of this horizontal ribbon mixer drives material in two opposing directions at once, which is why an 800 to 1200 kg batch reaches uniformity in 8 to 12 minutes.

Can the 2000 L unit handle 1200 kg? Yes, for powders with a bulk density above 0.6 g/cm³. For light powders the batch is limited to roughly 800 kg so that the loading coefficient stays under 60% and the ribbon is not buried.

Is a jacket really useful for a powder blender? It is when the same vessel must dry, cool or heat the blend. A jacketed horizontal ribbon mixer with hot water at 90 °C removes 3% to 5% surface moisture during a 30 minute blend, which is often enough to avoid a separate dryer.

How is the machine cleaned between products? The top cover opens fully and the discharge valve opens the entire trough bottom, so an operator can reach every surface. A CIP spray ball option is available for pharmaceutical use where validated cleaning is required.

The horizontal ribbon mixer is delivered as a single welded assembly on a steel skid, wrapped in export plywood with the drive and the electrical panel protected separately. Dynamic balancing of the ribbon shaft, a no load run test, weld inspection and a material certificate are completed before shipment. The warranty covers 12 months, and we supply shaft seals, discharge valve seals and drive belts as a recommended two year spare kit together with installation drawings.