High Shear MillIntroduction

High Shear Mixer is a tradition designed for each application. The number of elements and design specifics are determined by the specific application.

Mixers can be jacketed or electrically heated, and supplied with fixed or removable mixer element assemblies. Sizes range from 2 mm to 2 meters and larger in diameter.

High Shear Mill ranges from laboratory scale to industrial scale.

The shear force, in the shear mill is the leading force that causes size reduction of the material or a particle.

It is a type of Disc Mill. This apparatus is used for the bargain of particles into ultra-fine particles.

High Shear Mill is a double wheeled disc mill, in which one disc is motionless while, the other is portable or rotary.

A high-shear mixer can be used to generate emulsions, suspensions and granular goods.

It produces consistent mixtures of ingredients that do not logically mix.

Working Principle The material is fed through the hopper into the center of the stationary disc, straight into the stationary chamber. The rotating disc crushes and grinds the material or particle through attrition force at high speed until it is fine enough to pass through the pores of the screen. The crushed and the ground product is then collected in the discharge vessel.

Parts of High Shear Mill

The parts of high shear mill are given as;

Feed Hopper

Grinding Discs

Discharge Disc

Electric Motor

Features

Feed Size <20mm

Grind Size Up-to 100mm

Gap Width Setting 0.1mm----15mm

Feed Material Medium/Hard/Brittle

Motor Power 1500W

Drive 3-Phase Geared Motor

Advantages

Provides exceptional mixing or blending of two liquids, a liquid and a gas, two gases, or two powders.

Plug flow device (first in, first out).

Little and uniform residence time.

Uniform temperature.

No “hot-spots”.

Can be used for materials with low to high viscosities, Up-to 20,000 poise or more.

No maintenance (since no moving parts).

Can process highly corrosive materials.

High degree of mixing in short overall length.

Efficient Operation.

SUBMITTED TO;

ENGR. MEHWISH BATOOL

COURSE TITLE

PARTICULATE TECHNOLOGY (LAB)

GROUP MEMBERS

Applications Processes:

• Mixing

• Polymerization

• PH control

• Neutralization

• Gas mixing

• Powder mixing

• Extrusion

Industrial Applications

• Polymer Processing.

• Fiber Production.

• Plastics Extrusion.

• Foods including edible oil, mayonnaise, ice cream, chocolate, beverage, milk, yogurt, and cheese.

• Pharmaceutical.

• Injection Molding

• Fine Films.

Disadvantages High capital, maintenance and operating

costs

Produces dust.

Granules are less spherical than tumbling granulators.

Expensive operation.

Materials Elements can be constructed of;

• Stainless Steel

• Teflon

• Carbon Steel

• PVC

• PP (Polypropylene)

• PE (Polyethylene)

• FRP (Fiberglass Reinforced Plastics)

• Tantalum