Dry Powder Mixers Chemical Agitator

Dry powder mixers are essential in the chemical industry for blending powders, granules, and bulk solids to achieve uniform mixtures. They often incorporate specialized agitators to handle cohesive, abrasive, or sensitive materials, ensuring efficient mixing without degradation. Common applications include pharmaceuticals, agrochemicals, pigments, polymers, and fertilizers.

Dry Powder Mixers Chemical Agitator Video

Common Types of Dry Powder Mixers and Their Agitators

1. Ribbon Blenders Horizontal U-shaped trough with a double-helical ribbon agitator (inner and outer ribbons moving material in opposite directions). This creates convective flow for thorough blending. Ideal for free-flowing to moderately cohesive dry powders in chemicals. Fast mixing, scalable for large batches.

2. Paddle Mixers Similar to ribbon but uses angled paddle agitators for gentler action and fluidized-zone mixing. Suited for fragile or heat-sensitive chemical powders; less shear than ribbons.

3. Conical Screw Mixers (Nauta Mixers) Conical vessel with a orbiting helical screw agitator that lifts material from the bottom while the screw rotates. Gentle, excellent for precise chemical blends with varying densities; minimal dead zones.

4. V-Cone or Tumble Blenders No internal agitator (tumbling action); optional high-speed intensifier bar agitator for deagglomeration. Best for free-flowing, non-cohesive powders; high purity with easy cleaning.

Salient Features of Dry Powder Mixer

• Available in working capacity of 5 liters – 25,000 liters.

• Available in all grades of stainless steel, carbon steel and special alloy steels.

• Ribbon agitator for center discharge.

• Designed for atmospheric operation.

• Top cover depending on the length of the blender.

• Centrally located Flush bottom discharge valve.

• Stuffing boxes with easily disassembled housings. Pure Teflon gland packing provided.

• Stainless steel surfaces are polished to desired standards. All exterior non-stainless surfaces are painted with enamel paint.

• Squirrel Cage, Three Phase Induction Motors suitable for 415 Volts, 50 Hz.

• Worm Reduction Gearbox.

• Single Speed Drive.

• Blender is mounted on supports providing adequate discharge clearance.

• We have shaft sealing options of Mechanical Seal, Gland Packing or Double Mechanical Seal as per requirements.

Applications of Dry Powder Mixers Chemical Agitator

Ribbon type Blenders are uses in wide range of industrial applications in pharmaceutical, cosmetic, chemical, food, nutraceutical, herbal, agriculture and allied industry. The ribbon mixer’s flexibility for blending powders with its ability to perform heating, cooling, coating, and other processes make it very popular blender. The following are the major applications of the Ribbon Blender:

Pharmaceuticals Application: Bulk Drugs, API and Nutraceuticals

Cosmetics Application: Talcum Powder, Eye shadow, Face powders, laundry detergents

Chemicals Application:

Dyes, Intermediates, Pigments, Pesticides, Fine Chemicals, Rubber Chemicals, Abrasives, engineered plastic resins, Epoxy resins, Carbon black, Fire retardants, Polyethylene, Chemicals, Gypsum, PVC compounding, cleaning compounds, Plastic powders.

Food Applications:

Infant formula, Cocoa mix, Instant salad dressing, Cake mixes, Seasonings, Flavorings, Gelatin, Milk Powder, Pet foods, Bakery premixes, Cake mixes, Instant breakfast cereals, Spice blends, Dietary supplements, Instant drink blends, Spices, Dried food products

Agriculture Application:

Insecticides, Pesticides, Fertilizers, Pesticides and herbicides, Bird seeds

Other Applications:

Handling large Dry and wet powder volume, Crystalline products, Low viscosity paste and liquid in chemicals.

Process Operation of Ribbon Blender

Material is charged in the blender through nozzles or feed-hoppers mounted on the top cover of the blender. Suppose if screw feeder is opted with mixer, then material to be load onto screw feeder and it will feed powder into blender. Filling to be done about 70 percent of the total volume of the container. This is generally up to the level of the outer ribbon’s tip. After feeding completes then please close the top cover of the blender and tighten the latches. Now start the machine form the control panel.

During the blending operation, the outer ribbons of the agitator interchange the material from the ends to the center while the inner ribbons transfer the material from the center to ends. Radial movement is achieved because of the rotational motion of the ribbons. The difference in the peripheral speeds of the outer and inner ribbons results in axial movement of the material along the horizontal axis of the blender. As a result of the radial and the counter-current axial movement, homogenous blending is achieved in short time. Blending is generally performed in 15 to 20 minutes cycle time. Mixing efficiency of ribbon blender depends upon particle size and its bulk density. Generally, ribbon mixer blender with 95% efficiency in most of the cases. Ingredients with similar particle size and bulk densities tend to mix faster as compared to ingredients with variation in these attributes.

After mixing, material is discharged from a discharge valve located at center bottom of container. The discharge can be fitted with any of these valves like slide-gate, butterfly, flush bottom, spherical and other types depending on the application. The operation of the valves can be manual or pneumatically actuated as per requirements. Sifter can be installed at discharge of the blender for sieving the output materials.  Ribbon blenders can be designed for multiple discharge ports. Unlike tumbling blenders where 100% discharge of material is achieved by gravity, in a ribbon blender the material is discharged by rotation of the ribbon agitator. Finished powder can be collected directly on mobile container or can discharge onto conveyor for further operations.

Technical Specification of Ribbon Blender

* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.