This document discusses cryogenic grinding, which involves cooling a material to be ground to its embrittlement temperature using a cryogenic fluid like liquid nitrogen. Cryogenic grinding offers several advantages over conventional grinding, such as increased productivity, lower power consumption, smaller particle sizes, and minimal loss of volatile components. It can eliminate problems with conventional grinding like high heat generation, tensile residual stresses, oxidation, and loss of essential oils. Potential applications of cryogenic grinding include recycling composite materials, grinding thermosets, explosives, and spices.

1. Shirdi Sai Institute of Science and Engineering

3. OBJECTIVES
INTRODUCTION
PROBLEMS IN CONVENTIONAL GRINDING
WORKING
ADVANTAGES OF CRYOGRINDING
EXPERIMENTAL STUDIES
APPLICTONS
B.SANDHYA

5. CRYOGENICS
The term “cryogenics” originated from the
Greek word which means creation or
production by means of cold . Cryogenic is
sum.. Liquid nitrogen is the most commonly
used element . In cryogenics and legally is
purchasable around the world .

7. GRINDING
• The process is carried out with a grinding
wheel made up of grits for removing
materials from work piece surface
• Grinding can be classified in two types
Grinding for material removal
Grinding for powdering

10. PROBLEMS IN CONVENSTIONL
GRINDING PROCESS
• High heat generation
• Introduction of tensile residual stress
• Less local life
• Clogging and gumming of the mill
• Oxidation
• Loss of Etheric oil in spice grinding

11. ELIMINATING PROBLEMS
Now… elimination of all these problems are
require. But…
HOW…??

12. Here comes the necessity of
CRYOGENIC
GRINDING
…also known as Freeze Grinding

13. CRYOGENIC GRINDING
Cryogenic grinding involves the cooling a
material its embrittelment temperature with
cryogenic fluid . Typically Liquid Nitrogen or in
certain applications ,liquid Carbon Dioxide is
used

14. The process has several benefits
• Ability to process soft or elastic material
• Increased productivity
• Low power consumption
• Small size particles
• Minimal loss of volatile component

16. ADVANTAGES OF CRYOGENIC
GRINDING
• Increased throughput & power saving
• Finer particle size
• Lower grinding cost
• No heat generation
• Provides an inert atmosphere
• Provides clean and pollution free environment

19. APLICATIONS
• Recycling of composite material
• Thermo plastics
• Thermo sets
• Explosives
• Spices

22. ANY QUSENTIONS??
IN THIS PRESENTATION