The high shear mill is a device used to reduce particle sizes through attrition force. It consists of a stationary disc and a rotating disc with a gap that particles are fed into. As the rotating disc spins at high speeds, the particles are crushed and grind against each other and the screens until they are small enough to pass through. High shear mills can be used across industries to mix, blend, and process liquids, gases, and powders. They provide efficient mixing through short processing times and uniform temperatures without hot spots. However, they also have high operating costs and produce dust during particle size reduction.

1. High Shear Mill
Introduction
 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.

2. 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