Power point presentation on cryogenic grinding

1. Seminar
On
Cryogenic Grinding

2. CONTENTS
 Introduction
 What is Cryogenic Grinding Application of
Cryogenics
 Cryogenic Grinding Technology
 Advantages of Cryogenics
 Application of Cryogenic Grinding
 Problems with Conventional Grinding
 Advantages of Cryogrinding with Liquid
Nitrogen
 Future Prospects
 References

3. INTRODUCTION
• The term “Cryogenics” originates from Greek word
which means creation or production by means of cold.
• As prices for energy and raw materials rise and concern
for the environment makes safe waste disposal difficult
and Costly, resource recovery becomes a vital matter for
today’s business.
• Cryogenic grinding technology can efficiently grind
most tough materials and can also facilitate Cryogenic
recycling of tough composite materials and multi
component scrap.

4. WHAT IS CRYOGENIC GRINDING
 Cryogenic grinding, also known as freezer
milling, freezer grinding, and cryomilling, is the
act of cooling or chilling a material and then
reducing it into a small particle size.

5. APPLICATION OF CRYOGENICS
 In biology – for preservation and in treatment of
diseases.
 In food industry – for food handling and processing
 In nuclear and high – energy physics
 Metal fabrication

6. CRYOGENIC GRINDING TECHNOLOGY
 For pulverizing many materials, cryogenic grinding
technology increases productivity and lowers power
costs.
 Many elastic or "soft" materials are very difficult to
pulverize, requiring long cycle times and high energy
consumption.
 This combination decreased productivity and increased
costs unnecessarily.
 Cryogenic grinding involves cooling a material below its
embrittlement temperature with a cryogenic fluid,
typically liquid nitrogen or, in certain applications,
carbon dioxide.

7. ADVANTAGES OF CRYOGRINDING
 Higher production rate.
 Lower energy consumption.
 Finer particle size .
 More uniform particle distribution.
 Lower grinding cost.
 No heat generation which is good while grinding
spices, pharmaceuticals and scrap plastics.
 Provides an inert atmosphere thus eliminating the
possibility of oxidation.

8. APPLICATIONS OF CRYOGENIC GRINDING
 CryoGrinding of steel
 Thermoplastics
 Thermo sets
 Adhesives & Waxes
 Explosives
 Spices

9. PROBLEMS WITH CONVENTION
GRINDING
 Loss of etheric oil
 Clogging and gumming of themill
 Oxidation and related degradation

10. ADVANTAGES OF CRYOGRINDING WITH LIQUID NITROGEN
 Higher retention of etheric oils
 Prevention of oxidation and rancidity
 Increased throughput and power saving
 Finer particle size
 Reduction in microbial load
 Possibility of fine grinding of difficult spices

11. FUTURE PROSPECTS
 As the cost of raw materials and energy is
increasing day by day, it is very necessary to use
optimum quantity and at the same time getting
the required quality.
 By using CryoGrinding technology these aspects
can be met efficiently. By using this we can also
recycle tough and composite materials.
 It has many significant advantages over
conventional grinding. This also leads to value
addition to the product. CryoGrinding is
economically viable, if liquid nitrogen costs are
not formidable.

12. REFERENCES
 www.google.com
 www.wikipedia.com
 www.studymafia.org

13. THANKS