Post on 17-Feb-2017
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