02-01-2016, 12:36 PM
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
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.
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.
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
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.
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.
APPLICATIONS OF CRYOGENIC GRINDING
CryoGrinding of steel
Thermoplastics
Thermo sets
Adhesives & Waxes
Explosives
Spices
PROBLEMS WITH CONVENTION GRINDING
Loss of etheric oil
Clogging and gumming of themill
Oxidation and related degradation
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
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.